0001030894-26-000044 | 10-Q | XBRL Viewer

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CAPITAL STOCK - Schedule of Capital Stock (Details) - Capital stock - shares shares in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issued and outstanding, beginning balance (in shares)	114.9	116.1
Issued from treasury to settle vested SBC (in shares)	0.2	0.1
Cancelled under NCIB (in shares)	(0.1)	(1.2)
Issued and outstanding, ending balance (in shares)	115.0	115.0

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

+ Details

- Definition

Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

+ References

+ Details

BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 30, 2026
Accounting Policies [Abstract]
BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of preparation: These unaudited interim condensed consolidated financial statements for the period ended June 30, 2026 (Q2 2026 Interim Financial Statements) have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial reporting, and the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information or footnote disclosures, normally included in annual financial statements prepared in accordance with GAAP, have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Q2 2026 Interim Financial Statements, in the opinion of management, reflect all normal and recurring adjustments necessary to present fairly our financial position, operating results and cash flows for the periods presented. Results for interim periods are not necessarily an indication of results to be expected for the year. The three and six months ended June 30, 2026 are referred to herein as Q2 2026 and 1H 2026, respectively. The Q2 2026 Interim Financial Statements should be read in conjunction with our 2025 annual consolidated financial statements and related notes (2025 AFS) which are included in our Annual Report on Form 10-K for the year ended December 31, 2025. The Q2 2026 Interim Financial Statements are presented in United States (U.S.) dollars, which is also Celestica's functional currency. Unless otherwise noted, all financial information is presented in millions of U.S. dollars (except percentages and per share/per unit amounts). We have reclassified certain prior period information to conform with the presentation of the current period. Basis of consolidation: These consolidated financial statements include our subsidiaries, all of which are wholly owned. Any subsidiaries that are formed or acquired during the year are consolidated from their respective dates of formation or acquisition. Inter-company transactions and balances are eliminated on consolidation. Use of estimates and judgments: The preparation of financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies, the reported amounts of assets, liabilities, revenue and expenses, and related disclosures with respect to contingent assets and liabilities. We base our judgments, estimates and assumptions on current facts, historical experience and various other factors that we believe are reasonable under the circumstances. The economic environment also impacts certain estimates and discount rates necessary to prepare our consolidated financial statements, including significant estimates and discount rates applicable to the determination of the fair values used in the impairment testing of our non-financial assets. Our assessment of these factors forms the basis for our judgments on the carrying values of our assets and liabilities, and the accrual of our costs and expenses. Actual results could differ materially from our estimates and assumptions. We review our estimates and underlying assumptions on an ongoing basis and make revisions as determined necessary by management. Revisions are recognized in the period in which the estimates are revised and may also impact future periods. Our review of the estimates, judgments and assumptions used in the preparation of the Q2 2026 Interim Financial Statements included those relating to, among others: our determination of the timing of revenue recognition, the determination of whether indicators of impairment existed for our assets and reporting units, our measurement of deferred tax assets and liabilities, our estimated inventory write-downs and expected credit losses, and customer creditworthiness. Any revisions to estimates, judgments or assumptions may result in, among other things, write-downs, accelerated depreciation or amortization, or impairments of our assets or our reporting units, any of which could have a material impact on our financial performance and financial condition. Due to global economic conditions, including the impact of ongoing trade conflicts, tariffs, and geopolitical conflicts, there has been and we expect there will continue to be uncertainty in the global economy. Management has made estimates and assumptions based on information available as of the date of issuance of the Q2 2026 Interim Financial Statements taking into consideration certain possible impacts due to the foregoing factors. These estimates may change, as new events occur, or additional information is obtained. Significant accounting policies: The Q2 2026 Interim Financial Statements have been prepared on a basis consistent with the accounting policies as described in note 2 to our 2025 AFS. Recently issued accounting pronouncements not yet adopted: In November 2024, the FASB issued ASU 2024-03 Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to provide more detailed disclosures of certain costs and expenses in the notes to the financial statements. Specifically, the guidance mandates a tabular disaggregation of relevant expense captions into categories including inventory purchases, employee compensation, depreciation, and intangible asset amortization. The accounting standard update is effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. In November 2025, the FASB issued ASU 2025-09 Derivatives and Hedging (Topic 815): Hedge Accounting Improvements, which expands the hedged risks permitted to be aggregated in a group of individual forecasted transactions in a cash flow hedge, provides a model to facilitate the application of cash flow hedge accounting to forecasted interest payments on variable-rate debt instruments and expands hedge accounting for forecasted purchases and sales of non-financial assets. ASU 2025-09 is effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. In December 2025, the FASB issued ASU 2025-12 Codification Improvements, which provides narrow-scope amendments to clarify, correct errors, and improve the consistency of various topics within the Accounting Standards Codification. The update addresses several technical issues, including refining diluted earnings per share calculations during loss periods, clarifying lease receivable disclosures, and removing obsolete Master Glossary terms to enhance the overall usability of the guidance. ASU 2025-12 is effective for annual periods beginning after December 15, 2026, with early adoption permitted. In December 2025, the FASB issued ASU 2025-11 Interim Reporting (Topic 270): Narrow-Scope Improvements, which clarifies interim disclosure requirements. ASU 2025-11 is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact that the updated standards will have on our consolidated financial statements and related disclosures. We believe that other recently issued accounting standards will either not have a material impact on the consolidated financial statements or will not apply to our operations.

REPORTING ENTITY	6 Months Ended
REPORTING ENTITY	Jun. 30, 2026
Accounting Changes and Error Corrections [Abstract]
REPORTING ENTITY	REPORTING ENTITY Celestica Inc. (referred to herein as Celestica, the Company, we, us, or our) is incorporated in Ontario with its corporate headquarters located in Toronto, Ontario, Canada. Celestica’s common shares (Common Shares) are listed on the New York Stock Exchange (NYSE) and Toronto Stock Exchange (TSX). Our operating and reportable segments consist of the Connectivity & Cloud Solutions (CCS) segment and the Advanced Technology Solutions (ATS) segment. See note 3 for further detail regarding segment information.

CONTINGENCIES (Details) ฿ in Millions, RON in Millions, $ in Millions		12 Months Ended
	Jun. 30, 2026 USD ($)	Dec. 31, 2024 THB (฿)	Dec. 31, 2021 RON
Romanian Tax Authority
Unrecorded Unconditional Purchase Obligation [Line Items]
Tax examination, estimate of possible loss	$ 7		RON 31
Thailand Tax Authority
Unrecorded Unconditional Purchase Obligation [Line Items]
Tax examination, estimate of possible loss	$ 12	฿ 403

CAPITAL STOCK - Narrative (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Oct. 29, 2025	Oct. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Treasury stock, share-based compensation plan settlement (in shares)	2	30	1,600	2,000
Treasury stock, common	$ 20.7		$ 20.7		$ 153.8
Share-based compensation cash settlement	0.8	$ 0.0	$ 326.3	$ 156.0
RSUs
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			3 years
RSUs \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			33.30%
RSUs \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			33.30%
RSUs \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			33.30%
Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			4 years
Employee Stock Option \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Four
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
PSUs
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award performance period			3 years
PSUs \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, awards granted, percentage of target			0.00%
PSUs \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, awards granted, percentage of target			200.00%
Share-Based Payment Arrangement
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation cash settlement	$ 0.8	$ 0.0	$ 326.3	$ 156.0
Treasury stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Treasury stock, common (in shares)	200		200		1,800
2024 NCIB
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share repurchase program, authorized, number of shares (in shares)							8,600
2025 NCIB
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share repurchase program, authorized, number of shares (in shares)						5,700
Share repurchase program, remaining authorized, number of shares (in shares)	5,500		5,500

CREDIT FACILITIES

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

CREDIT FACILITIES

We are party to a credit agreement (Credit Facility) with Bank of America, N.A., as Administrative Agent, and the lenders party thereto, which, as of an April 2026 amendment (April 2026 Amendment), includes a new term loan in the original principal amount of $250.0 (Term A Loan), a term loan in the original principal amount of $500.0 (Term B Loan), and a $1,750.0 revolving credit facility (Revolver). Prior to the April 2026 Amendment, the Credit Facility included a term loan in the original principal amount of $250.0 (Refinanced Term A Loan), the Term B Loan, and commitments of $750.0 under the Revolver. The Refinanced Term A Loan was fully repaid at closing of the April 2026 Amendment, using a substantial portion of the proceeds of the Term A Loan. Notwithstanding the repayment of the Refinanced Term A Loan in full and its replacement with the Term A Loan, for accounting purposes, this transaction was treated as a non-substantial modification of the Refinanced Term A Loan. Term A Loan (or its predecessor term loan, the Refinanced Term A Loan) and the Term B Loan are referred to as the "Term Loans."

The Term A Loan and the Revolver each mature in April 2031. The Term B Loan matures in June 2031. The Term A Loan requires quarterly principal repayments of $3.125 (commencing in September 2026). The Term B Loan requires quarterly principal repayments of $1.250. Both Term Loans require a lump sum repayment of the remainder outstanding at maturity.

Prior to the April 2026 Amendment, (a) borrowings under the Revolver bore interest, depending on the currency of the borrowing and our election for such currency, at: (i) term Secured Overnight Financing Rate (Term SOFR) plus 0.1% (Adjusted Term SOFR), (ii) Base Rate, (iii) Canadian Prime, (iv) an Alternative Currency Daily Rate, or (v) an Alternative Currency Term Rate plus a specified margin (each as defined in the Credit Facility prior to the April 2026 Amendment); (b) the margin for borrowings under the Revolver ranged from 1.50% to 2.25%, or from 0.50% to 1.25%, in each case depending on the rate we selected and a defined net leverage ratio; (c) commitment fees ranged from 0.30% to 0.45%, depending on our defined net leverage ratio; and (d) outstanding amounts under the Refinanced Term A Loan bore interest at Adjusted Term SOFR or Base Rate, plus a margin ranging from 1.50% to 2.25% for Adjusted Term SOFR borrowings and from 0.50% to 1.25% for Base Rate borrowings, in each case depending on the rate we selected and our defined net leverage ratio.

Subsequent to the April 2026 Amendment, (a) borrowings under the Revolver bear interest at varying rates (as specified therein), plus a margin ranging from 1.00% to 1.75%, or from 0.05% to 0.75%, in each case depending on the currencies of the borrowings we select and the corporate rating of the Company (as defined in the Credit Facility); (b) commitment fees range from 0.100% to 0.275%, depending on the corporate rating of the Company (as defined in the Credit Facility); (c) outstanding amounts under the Term A Loan bear interest at varying rates (as specified therein), plus a margin ranging from 1.00% to 1.75%, or from 0.05% to 0.75%, in each case depending on the rate we select and the corporate rating of the Company (as defined in the Credit Facility).

Outstanding amounts under the Term B Loan bear interest at Term SOFR plus 1.75% or the Base Rate plus 0.75%, depending on the rate we select.

At June 30, 2026, outstanding borrowings under the Term A Loan bore interest at Term SOFR plus 1.50%; outstanding borrowings under the Term B Loan bore interest at Term SOFR plus 1.75%.

The Credit Facility has an accordion feature that allows us to increase the Term Loans and/or commitments under the Revolver by an amount equal to the sum of (i) the greater of $700.0 and 10% of our consolidated total assets as of the date of the incurrence of such incremental borrowings, (ii) voluntary repayments and certain other retirements of the Term A Loan, and (iii) an unlimited amount to the extent that certain defined leverage ratios do not exceed specified limits, in each case subject to the satisfaction of certain terms and conditions.

The Revolver also includes a $100.0 sub-limit for swing line loans, providing for short-term borrowings up to a maximum of ten business days, as well as a $300.0 sub-limit for letters of credit (L/Cs), in each case subject to the overall Revolver credit limit.

We are also required to make annual prepayments of outstanding obligations under the Credit Facility (applied first to the Term Loans, then to the Revolver, in the manner set forth in the Credit Facility) ranging from 0% to 50% (based on a defined leverage ratio) of specified excess cash flow for the prior fiscal year. No prepayments based on excess cash flow were required in 2025, or will be required in 2026. In addition, prepayments of outstanding obligations under the Credit Facility (applied as described above) may also be required in the amount of specified net cash proceeds received above a specified annual threshold (including proceeds from the disposal of certain assets). No prepayments based on net cash proceeds were required in 2025, or will be required in 2026. Any outstanding amounts under the Revolver are due at maturity.

Our obligations under the Credit Facility and the obligations of the guarantees provided by our subsidiaries are secured by substantially all of our assets of the Company and of the subsidiary guarantors. The April 2026 Amendment adds a collateral fallaway provision under which the liens securing (x) our obligations under the Credit Facility and (y) the guarantees provided by certain subsidiaries will be automatically released upon the satisfaction of specified conditions. These conditions include (a) the Company obtaining and maintaining investment grade credit ratings from at least two nationally recognized statistical rating organizations, (b) the repayment in full of all outstanding principal of, accrued interest on, and prepayment premiums and all other amounts in respect of the Term B Loan and any incremental Term B Loan and (c) the absence of any default or event of default under the Credit Facility as of the date of such collateral fallaway.

We are required to comply with certain restrictive covenants under the Credit Facility, including those relating to the incurrence of certain indebtedness, the existence of certain liens, the sale of certain assets, specified investments and payments, sale and leaseback transactions, and certain financial covenants relating to a defined interest coverage ratio and leverage ratio that are tested on a quarterly basis. Our Credit Facility also limits share repurchases for cancellation if our consolidated secured leverage ratio (as defined in such facility) exceeds a specified amount (Repurchase Restriction). At June 30, 2026 and December 31, 2025, we were in compliance with all restrictive and financial covenants under the Credit Facility, and the Repurchase Restriction was not exceeded.

We have entered into interest rate swap agreements to hedge against our exposures to the interest rate variability on a portion of the Term Loans. See note 14 for further detail.

The following table sets forth, at the dates shown, outstanding borrowings under the Credit Facility, excluding ordinary course L/Cs; notional amounts under our interest rate swap agreements; and outstanding finance lease obligations:


	Outstanding borrowings				Notional amounts under interest rate swaps (note 14)
	June 30 2026		December 31 2025		June 30 2026		December 31 2025
Borrowings under the Revolver	$	—	$	—	$	—	$	—
Borrowings under the Term Loans:
Refinanced Term A Loan	$	—	$	231.2	$	—	$	120.0
Term A Loan	250.0		—		120.0		—
Term B Loan	490.0		492.5		230.0		230.0
Total	$	740.0	$	723.7	$	350.0	$	350.0

Total borrowings under Credit Facility	$	740.0	$	723.7
Unamortized debt issuance costs related to the Term Loans	(5.1)		(5.2)
Finance lease obligations (see note 6)	75.5		58.0
	$	810.4	$	776.5

Total Credit Facility and finance lease obligations:
Current portion	$	26.4	$	26.0
Long-term portion	784.0		750.5
	$	810.4	$	776.5

The following table sets forth, at the dates shown, information regarding outstanding L/Cs, guarantees, surety bonds and overdraft facilities:


	June 30 2026		December 31 2025
Outstanding L/Cs under the Revolver	$	10.4	$	10.8
Outstanding bank guarantees and surety bonds outside the Revolver	37.0		38.1
Total	$	47.4	$	48.9
Available uncommitted bank overdraft facilities	$	211.9	$	198.5
Amounts outstanding under available uncommitted bank overdraft facilities	$	—	$	—

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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Reference 30: http://www.xbrl.org/2003/role/disclosureRef
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Reference 34: http://www.xbrl.org/2003/role/disclosureRef
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Reference 35: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2026
Accounting Policies [Abstract]
Basis of preparation	These unaudited interim condensed consolidated financial statements for the period ended June 30, 2026 (Q2 2026 Interim Financial Statements) have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial reporting, and the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information or footnote disclosures, normally included in annual financial statements prepared in accordance with GAAP, have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Q2 2026 Interim Financial Statements, in the opinion of management, reflect all normal and recurring adjustments necessary to present fairly our financial position, operating results and cash flows for the periods presented. Results for interim periods are not necessarily an indication of results to be expected for the year. The three and six months ended June 30, 2026 are referred to herein as Q2 2026 and 1H 2026, respectively. The Q2 2026 Interim Financial Statements should be read in conjunction with our 2025 annual consolidated financial statements and related notes (2025 AFS) which are included in our Annual Report on Form 10-K for the year ended December 31, 2025. The Q2 2026 Interim Financial Statements are presented in United States (U.S.) dollars, which is also Celestica's functional currency. Unless otherwise noted, all financial information is presented in millions of U.S. dollars (except percentages and per share/per unit amounts). We have reclassified certain prior period information to conform with the presentation of the current period.
Basis of consolidation	These consolidated financial statements include our subsidiaries, all of which are wholly owned. Any subsidiaries that are formed or acquired during the year are consolidated from their respective dates of formation or acquisition. Inter-company transactions and balances are eliminated on consolidation.
Use of estimates and judgments	The preparation of financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies, the reported amounts of assets, liabilities, revenue and expenses, and related disclosures with respect to contingent assets and liabilities. We base our judgments, estimates and assumptions on current facts, historical experience and various other factors that we believe are reasonable under the circumstances. The economic environment also impacts certain estimates and discount rates necessary to prepare our consolidated financial statements, including significant estimates and discount rates applicable to the determination of the fair values used in the impairment testing of our non-financial assets. Our assessment of these factors forms the basis for our judgments on the carrying values of our assets and liabilities, and the accrual of our costs and expenses. Actual results could differ materially from our estimates and assumptions. We review our estimates and underlying assumptions on an ongoing basis and make revisions as determined necessary by management. Revisions are recognized in the period in which the estimates are revised and may also impact future periods. Our review of the estimates, judgments and assumptions used in the preparation of the Q2 2026 Interim Financial Statements included those relating to, among others: our determination of the timing of revenue recognition, the determination of whether indicators of impairment existed for our assets and reporting units, our measurement of deferred tax assets and liabilities, our estimated inventory write-downs and expected credit losses, and customer creditworthiness. Any revisions to estimates, judgments or assumptions may result in, among other things, write-downs, accelerated depreciation or amortization, or impairments of our assets or our reporting units, any of which could have a material impact on our financial performance and financial condition. Due to global economic conditions, including the impact of ongoing trade conflicts, tariffs, and geopolitical conflicts, there has been and we expect there will continue to be uncertainty in the global economy. Management has made estimates and assumptions based on information available as of the date of issuance of the Q2 2026 Interim Financial Statements taking into consideration certain possible impacts due to the foregoing factors. These estimates may change, as new events occur, or additional information is obtained.
Recently issued accounting pronouncements not yet adopted	Recently issued accounting pronouncements not yet adopted: In November 2024, the FASB issued ASU 2024-03 Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to provide more detailed disclosures of certain costs and expenses in the notes to the financial statements. Specifically, the guidance mandates a tabular disaggregation of relevant expense captions into categories including inventory purchases, employee compensation, depreciation, and intangible asset amortization. The accounting standard update is effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. In November 2025, the FASB issued ASU 2025-09 Derivatives and Hedging (Topic 815): Hedge Accounting Improvements, which expands the hedged risks permitted to be aggregated in a group of individual forecasted transactions in a cash flow hedge, provides a model to facilitate the application of cash flow hedge accounting to forecasted interest payments on variable-rate debt instruments and expands hedge accounting for forecasted purchases and sales of non-financial assets. ASU 2025-09 is effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. In December 2025, the FASB issued ASU 2025-12 Codification Improvements, which provides narrow-scope amendments to clarify, correct errors, and improve the consistency of various topics within the Accounting Standards Codification. The update addresses several technical issues, including refining diluted earnings per share calculations during loss periods, clarifying lease receivable disclosures, and removing obsolete Master Glossary terms to enhance the overall usability of the guidance. ASU 2025-12 is effective for annual periods beginning after December 15, 2026, with early adoption permitted. In December 2025, the FASB issued ASU 2025-11 Interim Reporting (Topic 270): Narrow-Scope Improvements, which clarifies interim disclosure requirements. ASU 2025-11 is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact that the updated standards will have on our consolidated financial statements and related disclosures. We believe that other recently issued accounting standards will either not have a material impact on the consolidated financial statements or will not apply to our operations.

- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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+ Details

CAPITAL STOCK (Tables)

6 Months Ended

Jun. 30, 2026

Share-Based Payment Arrangement [Abstract]

Schedule of Stockholders Equity

Activities with respect to our capital stock for the periods indicated are set forth below:


Number of shares (in millions)			Common Shares
Issued and outstanding at December 31, 2024			116.1
Issued from treasury to settle vested SBC			0.1
Cancelled under normal course issuer bids (NCIB)			(1.2)
Issued and outstanding at June 30, 2025			115.0

Issued and outstanding at December 31, 2025			114.9
Issued from treasury to settle vested SBC			0.2
Cancelled under NCIB			(0.1)
Issued and outstanding at June 30, 2026			115.0

Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award

Information regarding Common Shares purchases in Q2 2026, 1H 2026 and respective prior year periods, for cancellation and for SBC plan delivery obligations (including under ASPPs) is set forth below:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Aggregate cost (including transaction fees and excluding share buyback taxes) of Common Shares repurchased for cancellation	$	—	$	40.0	$	20.0	$	115.0
Number of Common Shares repurchased for cancellation (in millions) (1)	—		0.6		0.1		1.2
Weighted average price per share for repurchases	$	—	$	70.48	$	273.60	$	94.05
Aggregate cost (including transaction fees) of Common Shares repurchased for delivery under SBC plans	$	—	$	—	$	—	$	221.6
Number of Common Shares repurchased for delivery under SBC plans (in millions) (2)	—		—		—		1.7

(1) For Q2 2025 and 1H 2025, includes 0.6 million Common Shares purchased for cancellation under NCIB ASPPs.

(2) Consists entirely of SBC ASPP purchases through an independent broker.

Information regarding RSU, PSU, DSU and D-RSU grants to employees and directors, as applicable, for the periods indicated is set forth below (no stock options were granted in the periods below):


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
RSUs Granted:
Number of awards (in millions)	0.03		0.04		0.2		0.3
Weighted average grant date fair value per unit	$	423.30	$	112.21	$	304.70	$	119.55

PSUs Granted:
Number of awards (in millions, representing 100% of target)	—		0.02		0.1		0.2
Weighted average grant date fair value per unit	$	482.27	$	139.53	$	329.08	$	146.35

DSUs Granted:
Number of awards (in millions)	0.001		0.002		0.002		0.01
Weighted average grant date fair value per unit	$	342.67	$	152.67	$	282.41	$	103.83

D-RSUs Granted:
Number of awards (in millions)	0.01		—		0.01		—
Weighted average grant date fair value per unit	$	339.13	$	—	$	339.13	$	—

Schedule of Share-Based Payment Arrangement, Cost by Plan

Information regarding employee and director SBC expense and TRS FVAs (which represent changes in fair value of the TRS) for the periods indicated is set forth below:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Employee SBC expense in cost of sales	$	9.6	$	7.3	$	23.2	$	17.4
Employee SBC expense in SG&A	9.7		7.9		26.6		23.8
Total employee SBC expense	$	19.3	$	15.2	$	49.8	$	41.2

TRS FVAs: gains in cost of sales	$	(48.4)	$	(40.6)	$	(40.9)	$	(33.1)
TRS FVAs: gains in SG&A	(55.7)		(56.8)		(46.2)		(45.2)

Total TRS FVAs: gains	$	(104.1)	$	(97.4)	$	(87.1)	$	(78.3)

Combined effect of employee SBC expense and TRS FVAs	$	(84.8)	$	(82.2)	$	(37.3)	$	(37.1)

Director SBC expense in SG&A(1)	$	0.6	$	0.5	$	1.2	$	1.1

(1) Expense consists of director compensation to be settled with Common Shares, or Common Shares and cash.

LEASES - Schedule of Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Leases [Abstract]
Amortization of ROU assets	$ 2.7	$ 2.0	$ 4.8	$ 4.1
Interest on lease obligations	0.9	0.8	1.6	1.6
Operating lease expense	12.2	10.3	24.5	20.6
Short-term lease expense and variable lease expense	0.3	0.7	1.1	1.1
Total	$ 16.1	$ 13.8	$ 32.0	$ 27.4

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Tables)

6 Months Ended

Jun. 30, 2026

Financial Instruments and Risk Management [Abstract]

Schedule of Derivative Instruments

The tables below present information regarding the fair values of derivative instruments and the effects of derivative instruments on our consolidated financial statements:

Derivatives not designated as hedging instruments (economic hedges):


	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance sheet classification	June 30 2026		December 31 2025		Balance sheet classification	June 30 2026		December 31 2025
Foreign currency contracts	Other current assets	$	3.8	$	5.5	Other current liabilities	$	12.3	$	2.9
TRS	Other current assets	94.3		7.2		Other current liabilities	—		—


Loss (Gain) Recognized in Income	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Foreign currency contracts
Cost of sales	$	3.1	$	—	$	5.3	$	(0.3)
SG&A	3.7		(0.4)		9.3		2.2

TRS (see note 8)
Cost of sales	(48.4)		(40.6)		(40.9)		(33.1)
SG&A	(55.7)		(56.8)		(46.2)		(45.2)

Derivatives designated as cash flow hedges:


	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance sheet classification	June 30 2026		December 31 2025		Balance sheet classification		June 30 2026		December 31 2025
Foreign currency contracts (i)	Other current assets	$	3.6	$	12.1	Other current liabilities		$	21.4	$	1.5
Interest rate swaps (ii)	Other current assets	1.3		—		Other current liabilities		—		—
Interest rate swaps (ii)	Other non-current assets	2.3		0.4		Other non-current liabilities		—		2.8

(i) In the next twelve months, we estimate that $13.8 of existing losses, net of tax, will be reclassified from AOCI into our consolidated statements of operations. The maximum length of time we hedge our exposure to the variability in future cash flows for forecasted foreign currency transactions is 12 months.

(ii) In the next twelve months, we estimate that $0.9 of existing gains, net of tax, will be reclassified from AOCI into our consolidated statements of operations. The maximum length of time that we hedge our exposure to the variability in future cash flows for forecasted interest payments is 3 years.


Loss (Gain) Reclassified from AOCI into Income	Three months ended June 30				Six months ended June 30
(see note 9 for activities recorded in AOCI for the periods indicated)	2026		2025		2026		2025

Foreign currency contracts

Cost of sales	$	0.7	$	(2.6)	$	(6.0)	$	1.1
SG&A	0.8		(1.6)		1.7		(0.7)


Interest rate swaps
Finance costs	$	(0.1)	$	(1.9)	$	(0.3)	$	(3.7)
Miscellaneous expense	—		1.3		—		2.6

ACCOUNTS RECEIVABLE (A/R), NET (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Receivables [Abstract]
Accounts receivable, allowance	$ 39.5	$ 30.5
Contract asset, after allowance for credit loss	$ 325.4	$ 296.3

SEGMENT AND CUSTOMER REPORTING - Narrative (Details) - segment	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Number of operating segments			2
Number of reportable segments			2
Operating Segments \| Customer One \| Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| CCS
Segment Reporting [Line Items]
Concentration risk, percentage	32.00%	31.00%	34.00%	30.00%
Operating Segments \| Customer Two \| Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| CCS
Segment Reporting [Line Items]
Concentration risk, percentage	17.00%	13.00%	16.00%	13.00%
Operating Segments \| Customer Three \| Revenue from Contract with Customer Benchmark \| Customer Concentration Risk \| CCS
Segment Reporting [Line Items]
Concentration risk, percentage	14.00%		15.00%	10.00%

EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

Basic and diluted earnings per share are calculated by dividing net earnings by the following weighted average number of shares:


	Three months ended June 30		Six months ended June 30
(in millions)	2026	2025	2026	2025
Basic weighted average number of shares outstanding	115.0	115.1	115.0	115.5
Diluted effect of outstanding awards under SBC plans	1.2	0.8	1.0	0.9
Diluted weighted average number of shares outstanding	116.2	115.9	116.0	116.4

SEGMENT AND CUSTOMER REPORTING

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

SEGMENT AND CUSTOMER REPORTING

Segments:

Celestica serves customers in two operating and reportable segments. Our CCS segment consists of our Communications and Enterprise (servers and storage) end markets. Our ATS segment consists of our ATS end market, and is comprised of our Aerospace and Defense, Industrial, HealthTech, and Capital Equipment businesses. Segment performance is evaluated based on segment revenue, segment income and segment margin (segment income as a percentage of segment revenue). Segment income is defined as a segment's revenue less its cost of sales and its allocatable portion of selling, general and administrative expenses (SG&A) and research and development expenses (collectively, Segment Costs). See note 21 to our 2025 AFS for a description of the businesses that comprise our segments, how segment revenue is attributed, how costs are allocated to our segments, and how segment income and segment margin are determined.

Information regarding each reportable segment for the periods indicated is set forth below:


Revenue by segment:	Three months ended June 30								Six months ended June 30
	2026				2025				2026				2025
			% of total				% of total				% of total				% of total
CCS
Communications	$	2,653.2	56	%	$	1,641.2	57	%	$	5,063.8	58	%	$	3,068.9	56	%
Enterprise	1,157.1		25	%	433.1		15	%	1,987.5		23	%	846.8		15	%
	$	3,810.3	81	%	$	2,074.3	72	%	$	7,051.3	81	%	$	3,915.7	71	%

ATS	888.3		19	%	819.1		28	%	1,694.3		19	%	1,626.3		29	%

Total revenue	$	4,698.6			$	2,893.4			$	8,745.6			$	5,542.0


Segment Costs by segment:	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
CCS cost of sales	$	3,374.0	$	1,829.6	$	6,252.4	$	3,460.2
CCS other Segment Costs	106.4		73.5		191.8		137.2
ATS cost of sales	785.9		726.1		1,496.2		1,452.6
ATS other Segment Costs	46.0		49.5		93.7		89.5
Total Segment Costs	$	4,312.3	$	2,678.7	$	8,034.1	$	5,139.5


Segment income, segment margin, and reconciliation of segment income to earnings before income taxes:		Three months ended June 30								Six months ended June 30
	Note	2026				2025				2026				2025
				Segment Margin				Segment Margin				Segment Margin				Segment Margin
CCS segment income and margin		$	329.9	8.7	%	$	171.2	8.3	%	$	607.1	8.6	%	$	318.3	8.1	%
ATS segment income and margin		56.4		6.3	%	43.5		5.3	%	104.4		6.2	%	84.2		5.2	%
Total segment income		386.3				214.7				711.5				402.5
Reconciling items:
Finance costs		21.2				14.4				39.2				29.4
Interest income		(3.8)				(0.9)				(5.8)				(2.2)
Miscellaneous expense (income)	11	(0.7)				1.7				(0.9)				3.1

Employee SBC expense		19.3				15.2				49.8				41.2
TRS fair value adjustment (TRS FVA): gains		(104.1)				(97.4)				(87.1)				(78.3)
Amortization of intangible assets (excluding computer software)		9.9				9.9				19.9				19.9
Restructuring and other charges (recoveries)	10	2.9				14.5				(1.5)				18.4
Earnings before income taxes		$	441.6			$	257.3			$	697.9			$	371.0

Customers:

Three customers (all in our CCS segment) individually represented 10% or more of total revenue in Q2 2026 (32%, 17% and 14%) and 1H 2026 (34%, 16% and 15%).

Two customers (both in our CCS segment) individually represented 10% or more of total revenue in the second quarter of 2025 (Q2 2025) (31% and 13%). Three customers (all in our CCS segment) individually represented 10% or more of total revenue in the first half of 2025 (1H 2025) (30%, 13% and 10%).

- Definition

The entire disclosure for segment reporting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

RESTRUCTURING AND OTHER CHARGES (RECOVERIES) (Tables)

6 Months Ended

Jun. 30, 2026

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Other Charges, Net of Recoveries


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Restructuring charges (a)	$	2.9	$	12.8	$	5.1	$	15.0
Transition Costs (Recoveries) (b)	—		1.1		(3.4)		1.1
Acquisition costs (c)	—		0.3		3.4		0.9
Other charges (recoveries) (d)	—		0.3		(6.6)		1.4
	$	2.9	$	14.5	$	(1.5)	$	18.4

INVENTORIES - Schedule of Inventory (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Inventory Disclosure [Abstract]
Raw materials	$ 2,705.9	$ 1,783.1
Work in progress	236.1	144.6
Finished goods	459.7	260.3
Inventories	$ 3,401.7	$ 2,188.0

CREDIT FACILITIES - Schedule of Long-Term Debt Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Line of Credit Facility [Line Items]
Finance lease obligations (see note 6)	$ 75.5	$ 58.0
Total Credit Facility and finance lease obligations:	810.4	776.5
Current portion	26.4	26.0
Long-term portion	784.0	750.5
Line of Credit
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	740.0	723.7
Line of Credit \| Letter of Credit, Guarantees, Surety Bonds, and Overdraft Facilities
Line of Credit Facility [Line Items]
Long-term debt	47.4	48.9
Revolving Facility \| Line of Credit
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	0.0	0.0
Revolving Facility \| Line of Credit \| Interest rate swap derivatives
Line of Credit Facility [Line Items]
Notional amounts under interest rate swaps (note 14)	0.0	0.0
Secured Debt \| Line of Credit
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	740.0	723.7
Unamortized debt issuance costs related to the Term Loans	(5.1)	(5.2)
Secured Debt \| Line of Credit \| Refinanced Term Loan A
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	0.0	231.2
Secured Debt \| Line of Credit \| Term A Loan
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	250.0	0.0
Secured Debt \| Line of Credit \| Term B Loan
Line of Credit Facility [Line Items]
Total borrowings under Credit Facility	490.0	492.5
Secured Debt \| Line of Credit \| Interest rate swap derivatives
Line of Credit Facility [Line Items]
Notional amounts under interest rate swaps (note 14)	350.0	350.0
Secured Debt \| Line of Credit \| Interest rate swap derivatives \| Refinanced Term Loan A
Line of Credit Facility [Line Items]
Notional amounts under interest rate swaps (note 14)	0.0	120.0
Secured Debt \| Line of Credit \| Interest rate swap derivatives \| Term A Loan
Line of Credit Facility [Line Items]
Notional amounts under interest rate swaps (note 14)	120.0	0.0
Secured Debt \| Line of Credit \| Interest rate swap derivatives \| Term B Loan
Line of Credit Facility [Line Items]
Notional amounts under interest rate swaps (note 14)	230.0	230.0
Letter of Credit \| Line of Credit \| Letter of Credit, Guarantees, Surety Bonds, and Overdraft Facilities
Line of Credit Facility [Line Items]
Long-term debt	10.4	10.8
Bank Guarantees and Surety Bonds \| Line of Credit \| Letter of Credit, Guarantees, Surety Bonds, and Overdraft Facilities
Line of Credit Facility [Line Items]
Long-term debt	37.0	38.1
Bank Overdraft Facility \| Line of Credit
Line of Credit Facility [Line Items]
Long-term debt	0.0	0.0
Available uncommitted bank overdraft facilities	$ 211.9	$ 198.5

CREDIT FACILITIES (Tables)

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Schedule of Long-Term Debt Instruments


	Outstanding borrowings				Notional amounts under interest rate swaps (note 14)
	June 30 2026		December 31 2025		June 30 2026		December 31 2025
Borrowings under the Revolver	$	—	$	—	$	—	$	—
Borrowings under the Term Loans:
Refinanced Term A Loan	$	—	$	231.2	$	—	$	120.0
Term A Loan	250.0		—		120.0		—
Term B Loan	490.0		492.5		230.0		230.0
Total	$	740.0	$	723.7	$	350.0	$	350.0

Total borrowings under Credit Facility	$	740.0	$	723.7
Unamortized debt issuance costs related to the Term Loans	(5.1)		(5.2)
Finance lease obligations (see note 6)	75.5		58.0
	$	810.4	$	776.5

Total Credit Facility and finance lease obligations:
Current portion	$	26.4	$	26.0
Long-term portion	784.0		750.5
	$	810.4	$	776.5

The following table sets forth, at the dates shown, information regarding outstanding L/Cs, guarantees, surety bonds and overdraft facilities:


	June 30 2026		December 31 2025
Outstanding L/Cs under the Revolver	$	10.4	$	10.8
Outstanding bank guarantees and surety bonds outside the Revolver	37.0		38.1
Total	$	47.4	$	48.9
Available uncommitted bank overdraft facilities	$	211.9	$	198.5
Amounts outstanding under available uncommitted bank overdraft facilities	$	—	$	—

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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+ Details

EARNINGS PER SHARE (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
EARNINGS PER SHARE (Details) - shares shares in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share [Abstract]
Basic weighted average number of shares outstanding (in shares)	115.0	115.1	115.0	115.5
Diluted effect of outstanding awards under SBC plans (in shares)	1.2	0.8	1.0	0.9
Diluted weighted average number of shares outstanding (in shares)	116.2	115.9	116.0	116.4

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2026 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Todd Cooper [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	On June 4, 2026, Todd Cooper, President, Advanced Technology Solutions, entered into a trading plan that provides for the sale of up to an aggregate of 60,360 Common Shares. The plan will terminate on March 9, 2027, subject to early termination for certain specified events set forth in the plan.
Name	Todd Cooper
Title	President, Advanced Technology Solutions
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	June 4, 2026
Expiration Date	March 9, 2027
Arrangement Duration	278 days
Aggregate Available	60,360

SEGMENT AND CUSTOMER REPORTING - Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total segment income	$ 458.3	$ 272.5	$ 730.4	$ 401.3
Reconciling items:
Finance costs	21.2	14.4	39.2	29.4
Interest income	(3.8)	(0.9)	(5.8)	(2.2)
Miscellaneous expense (income)	(0.7)	1.7	(0.9)	3.1
Employee SBC expense	19.3	15.2	49.8	41.2
TRS fair value adjustment (TRS FVA): gains	(104.1)	(97.4)	(87.1)	(78.3)
Restructuring and other charges (recoveries)	2.9	14.5	(1.5)	18.4
Earnings before income taxes	441.6	257.3	697.9	371.0
Operating Segments
Segment Reporting [Line Items]
Total segment income	386.3	214.7	711.5	402.5
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Reconciling items:
Finance costs	21.2	14.4	39.2	29.4
Interest income	(3.8)	(0.9)	(5.8)	(2.2)
Miscellaneous expense (income)	(0.7)	1.7	(0.9)	3.1
Employee SBC expense	19.3	15.2	49.8	41.2
TRS fair value adjustment (TRS FVA): gains	(104.1)	(97.4)	(87.1)	(78.3)
Amortization of intangible assets (excluding computer software)	9.9	9.9	19.9	19.9
Restructuring and other charges (recoveries)	2.9	14.5	(1.5)	18.4
CCS \| Operating Segments
Segment Reporting [Line Items]
Total segment income	$ 329.9	$ 171.2	$ 607.1	$ 318.3
Segment margin, percentage	8.70%	8.30%	8.60%	8.10%
ATS \| Operating Segments
Segment Reporting [Line Items]
Total segment income	$ 56.4	$ 43.5	$ 104.4	$ 84.2
Segment margin, percentage	6.30%	5.30%	6.20%	5.20%

CAPITAL STOCK - Schedule of SBC Expense and RSU Activity (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
RSUs Granted:
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of awards granted (in shares)	30	40	200	300
Granted, weighted average grant date fair value (in dollars per share)	$ 423.30	$ 112.21	$ 304.70	$ 119.55
PSUs Granted:
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of awards granted (in shares)	0	20	100	200
Granted, weighted average grant date fair value (in dollars per share)	$ 482.27	$ 139.53	$ 329.08	$ 146.35
Equity awards other than options, percent of target achieved	100.00%	100.00%	100.00%	100.00%
DSUs Granted:
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of awards granted (in shares)	1	2	2	10
Granted, weighted average grant date fair value (in dollars per share)	$ 342.67	$ 152.67	$ 282.41	$ 103.83
D-RSUs Granted:
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of awards granted (in shares)	10	0	10	0
Granted, weighted average grant date fair value (in dollars per share)	$ 339.13	$ 0	$ 339.13	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
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Reference 26: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

RESTRUCTURING AND OTHER CHARGES (RECOVERIES)

6 Months Ended

Jun. 30, 2026

Restructuring and Related Activities [Abstract]

RESTRUCTURING AND OTHER CHARGES (RECOVERIES)


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Restructuring charges (a)	$	2.9	$	12.8	$	5.1	$	15.0
Transition Costs (Recoveries) (b)	—		1.1		(3.4)		1.1
Acquisition costs (c)	—		0.3		3.4		0.9
Other charges (recoveries) (d)	—		0.3		(6.6)		1.4
	$	2.9	$	14.5	$	(1.5)	$	18.4

(a) Restructuring charges:

Our restructuring activities consist primarily of actions to adjust our cost base to address reduced levels of demand in certain of our businesses and geographies. In Q2 2026, 1H 2026 and the respective prior year periods, our restructuring charges consisted primarily of cash charges related to employee terminations. At June 30, 2026, our restructuring provision was $4.0 (December 31, 2025 — $4.4), which we recorded in accrued and other current liabilities and provisions on our consolidated balance sheets.

(b) Transition Costs (Recoveries):

See note 14 to the 2025 AFS for a description of Transition Costs and Transition Recoveries. In 1H 2026, we recorded Transition Recoveries of $3.4, reflecting the gain on the disposal of certain real properties.

Acquisition costs consisted of consulting, transaction and integration costs related to potential and completed acquisitions.

(d) Other charges (recoveries):

In April 2024, we completed the acquisition of 100% of the interests of NCS Global Services LLC (NCS). The NCS acquisition agreement includes a potential earn-out of up to $20 if certain adjusted earnings before interest, taxes, depreciation and amortization targets are achieved during the period from May 2024 to April 2025. The fair value of such potential earn-out was estimated to be $6.6 at the acquisition date. During 1H 2026, the liability was re-measured to nil as the required targets were not met, resulting in a $6.6 gain.

In Q2 2025 and 1H 2025, we recorded other charges of $0.3 and $1.4, respectively, related to our transition as a U.S. domestic filer.

LEASES - Schedule of Other Information Related to Leases (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
ROU assets:
Operating lease ROU assets	$ 152.7	$ 124.1
Finance lease ROU assets (included in property, plant & equipment, net)	$ 65.8	$ 49.0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Total ROU assets	$ 218.5	$ 173.1
Current portion of lease obligations:
Operating lease liability (included in accrued and other current liabilities and provisions)	$ 32.5	$ 31.6
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued and other current liabilities and provisions	Accrued and other current liabilities and provisions
Finance lease liability (included in current portion of borrowings under credit facility and finance lease obligations)	$ 9.9	$ 9.5
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current portion	Current portion
Long-term portion of lease obligations:
Operating lease liability (included in other non-current liabilities and provisions)	$ 138.3	$ 107.6
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities and provisions	Other non-current liabilities and provisions
Finance lease liability (included in long-term portion of borrowings under credit facility and finance lease obligations)	$ 65.6	$ 48.5
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term portion	Long-term portion
Total lease obligations	$ 246.3	$ 197.2

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Schedule of Amount of Loss (Gain) Recognized in Income (Details) - Not Designated as Hedging Instrument, Economic Hedge - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Foreign currency contracts \| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 3.1	$ 0.0	$ 5.3	$ (0.3)
Foreign currency contracts \| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	3.7	(0.4)	9.3	2.2
TRS \| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(48.4)	(40.6)	(40.9)	(33.1)
TRS \| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (55.7)	$ (56.8)	$ (46.2)	$ (45.2)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(5)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Subparagraph (a)(6)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 4D
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

RESTRUCTURING AND OTHER CHARGES (RECOVERIES) - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Apr. 30, 2024
Restructuring Cost and Reserve [Line Items]
Current	$ 4,000,000.0		$ 4,000,000.0		$ 4,400,000
Transition Costs (Recoveries)	0	$ 1,100,000	(3,400,000)	$ 1,100,000
Other charges (recoveries)	0	$ (300,000)	6,600,000	$ (1,400,000)
NCS Global Services LLC
Restructuring Cost and Reserve [Line Items]
Percentage of voting interests acquired						100.00%
Contingent consideration, maximum potential earn-out						$ 20,000,000
Contingent consideration liability	$ 0		$ 0			$ 6,600,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Dec. 31, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Line of Credit Facility [Line Items]
Proceeds from TRS settlement	$ 246.6	$ 98.6	$ 0.0	$ 0.0	$ 0.0	$ 98.6
Line of Credit
Line of Credit Facility [Line Items]
Long-term debt, unhedged amount			390.0		390.0
Term A Loan \| Line of Credit \| Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, unhedged amount			130.0		130.0
Term B Loan \| Line of Credit \| Secured Debt
Line of Credit Facility [Line Items]
Long-term debt, unhedged amount			$ 260.0		$ 260.0
TRS
Line of Credit Facility [Line Items]
Derivative instrument, annual extensions period					1 year
Derivative notional amount (in shares)	1,250		1,250		1,250
Weighted average price per share (in dollars per share)	$ 288.87	$ 91.58
Interest Rate Swap June 2027 \| Term A Loan \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional amount			$ 80.0		$ 80.0
Interest Rate Swap June 2027 \| Term B Loan \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional amount			230.0		230.0
Interest Rate Swap June 2029 \| Term A Loan \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional amount			40.0		40.0
Interest Rate Swap June 2027 to June 2029 \| Term A Loan \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional amount			80.0		80.0
Interest Rate Swap June 2027 to June 2029 \| Term B Loan \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional amount			$ 230.0		$ 230.0

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2026

Jun. 30, 2025

Jun. 30, 2026

Jun. 30, 2025

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

$ 2,098.2

$ 1,556.8

$ 2,216.3

$ 1,896.0

Ending balance

2,479.6

1,757.9

2,479.6

1,757.9

Translation adjustments:

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

(38.2)

(34.8)

(36.0)

(35.5)

Reclassification of net loss (gain)

(1.8)

4.3

(4.0)

5.0

Ending balance

(40.0)

(30.5)

(40.0)

(30.5)

Cash flow hedge | Foreign exchange derivatives

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

(6.2)

(3.1)

9.0

(9.4)

Net gain (loss) before reclassifications

(8.5)

18.6

(17.6)

21.2

Reclassification of net loss (gain)

0.9

(3.4)

(5.2)

0.3

Ending balance

(13.8)

12.1

(13.8)

12.1

Cash flow hedge | Interest rate swap derivatives

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

(0.5)

(0.7)

(2.9)

1.4

Net gain (loss) before reclassifications

3.7

(1.0)

6.3

(2.6)

Reclassification of net loss (gain)

(0.1)

(0.6)

(0.3)

(1.1)

Ending balance

3.1

(2.3)

3.1

(2.3)

Employment benefit

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

27.1

22.9

28.2

25.9

Net gain (loss) before reclassifications

(0.1)

(2.6)

(0.2)

(5.0)

Reclassification of net loss (gain)

(1.0)

(0.5)

(2.0)

(1.1)

Ending balance

26.0

19.8

26.0

19.8

Accumulated other comprehensive loss (AOCI), net of tax

AOCI Attributable to Parent, Net of Tax [Roll Forward]

Beginning balance

(17.8)

^[1]

(15.7)

^[2]

(1.7)

^[1]

(17.6)

^[2]

Ending balance

$ (24.7)

^[1]

$ (0.9)

^[2]

$ (24.7)

^[1]

$ (0.9)

^[2]

[1]	Accumulated other comprehensive income (loss) is net of tax (see note 9).
[2]	Accumulated other comprehensive income (loss) is net of tax (see note 9).

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX

6 Months Ended

Jun. 30, 2026

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Translation adjustments:
Opening balance of foreign currency translation account	$	(38.2)	$	(34.8)	$	(36.0)	$	(35.5)
Foreign currency translation adjustments	(1.8)		4.3		(4.0)		5.0
Closing balance of foreign currency translation account	$	(40.0)	$	(30.5)	$	(40.0)	$	(30.5)

Foreign exchange derivatives (i):
Opening balance of unrealized net gain (loss) on currency forward cash flow hedges	$	(6.2)	$	(3.1)	$	9.0	$	(9.4)
Net gain (loss) on currency forward cash flow hedges	(8.5)		18.6		(17.6)		21.2
Reclassification of net loss (gain) on currency forward cash flow hedges to operations	0.9		(3.4)		(5.2)		0.3
Closing balance of unrealized net gain (loss) on currency forward cash flow hedges	$	(13.8)	$	12.1	$	(13.8)	$	12.1

Interest rate swap derivatives (i):
Opening balance of unrealized net gain (loss) on interest rate swap cash flow hedges	$	(0.5)	$	(0.7)	$	(2.9)	$	1.4
Net gain (loss) on interest rate swap cash flow hedges	3.7		(1.0)		6.3		(2.6)
Reclassification of net gain on interest rate swap cash flow hedges to operations	(0.1)		(0.6)		(0.3)		(1.1)
Closing balance of unrealized net gain (loss) on interest rate swap cash flow hedges	$	3.1	$	(2.3)	$	3.1	$	(2.3)

Employment benefit (i):
Opening balance of pension and non-pension post-employment benefit account	$	27.1	$	22.9	$	28.2	$	25.9
Net loss on pension and non-pension post-employment benefit plans	(0.1)		(2.6)		(0.2)		(5.0)
Amortization of net gain on pension and non-pension post-employment benefit plans	(1.0)		(0.5)		(2.0)		(1.1)



Closing balance of pension and non-pension post-employment benefit account	$	26.0	$	19.8	$	26.0	$	19.8

Accumulated other comprehensive loss (AOCI), net of tax	$	(24.7)	$	(0.9)	$	(24.7)	$	(0.9)

(i) Amounts were net of immaterial tax.

Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2026	Jul. 22, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2026
Document Transition Report	false
Entity File Number	001-14832
Entity Registrant Name	CELESTICA INC.
Entity Incorporation, State or Country Code	A6
Entity Tax Identification Number	98-0185558
Entity Address, Address Line One	5140 Yonge Street
Entity Address, Address Line Two	Suite 1900
Entity Address, City or Town	Toronto
Entity Address, State or Province	ON
Entity Address, Country	CA
Entity Address, Postal Zip Code	M2N 6L7
City Area Code	416
Local Phone Number	448-2211
Title of 12(b) Security	Common Shares
Trading Symbol	CLS
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		114,982,086
Amendment Flag	false
Document Period End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001030894

CAPITAL STOCK - Schedule of Common Shares Purchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Aggregate cost (including transaction fees and excluding share buyback taxes) of Common Shares repurchased for cancellation	$ 0.0	$ 40.0	$ 20.0	$ 115.0
Number of Common Shares repurchased for cancellation (in shares)	0.0	0.6	0.1	1.2
Weighted average price per share for repurchases (in dollars per share)	$ 0	$ 70.48	$ 273.60	$ 94.05
Aggregate cost (including transaction fees) of Common Shares repurchased for delivery under SBC plans	$ 0.0	$ 0.0	$ 0.0	$ 221.6
Number of Common Shares repurchased for delivery under SBC plans (in shares)	0.0	0.0	0.0	1.7
NCIB ASPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Common Shares repurchased for cancellation (in shares)		0.6		0.6

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 210
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-Topic 946
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-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
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-Topic 946
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-Publisher FASB
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+ Details

PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS

The components of net periodic benefit cost for the periods indicated are as follows:


	Pension Plans				Other Benefits Plans				Pension Plans				Other Benefits Plans
	Three months ended June 30				Three months ended June 30				Six months ended June 30				Six months ended June 30
	2026		2025		2026		2025		2026		2025		2026		2025
Service cost	$	0.6	$	0.5	$	1.0	$	0.8	$	1.2	$	1.0	$	2.1	$	1.6
Interest cost	2.6		2.6		0.8		0.8		5.3		5.1		1.5		1.5
Expected return on plan assets	(2.5)		(2.5)		—		—		(5.1)		(5.0)		—		—

Amortization of net gain	(0.1)		—		(0.9)		(0.5)		(0.2)		(0.1)		(1.8)		(1.0)

Net periodic benefit cost	$	0.6	$	0.6	$	0.9	$	1.1	$	1.2	$	1.0	$	1.8	$	2.1

The components of net periodic benefit cost, other than the service cost component, are included in miscellaneous expense in our consolidated statements of operations. See note 11. We generally record the service cost component in cost of sales and SG&A, depending on the nature of the expenses.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Topic 715
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-Name Accounting Standards Codification
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-Subparagraph (r)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

CAPITAL STOCK - Schedule of SBC Expense and TRS Fair Value Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee SBC expense	$ 19.3	$ 15.2	$ 49.8	$ 41.2
Total TRS FVAs: gains	(104.1)	(97.4)	(87.1)	(78.3)
Combined effect of employee SBC expense and TRS FVAs	(84.8)	(82.2)	(37.3)	(37.1)
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee SBC expense	9.6	7.3	23.2	17.4
Total TRS FVAs: gains	(48.4)	(40.6)	(40.9)	(33.1)
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee SBC expense	9.7	7.9	26.6	23.8
Total TRS FVAs: gains	(55.7)	(56.8)	(46.2)	(45.2)
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense \| Director
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee SBC expense	$ 0.6	$ 0.5	$ 1.2	$ 1.1

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

CONTINGENCIES	6 Months Ended
CONTINGENCIES	Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES Litigation: In the normal course of our operations, we may be subject to litigation, investigations and other claims, including legal, regulatory and tax proceedings. Management believes that adequate provisions have been recorded where required. Although it is not always possible to estimate the extent of potential costs, if any, management believes that the ultimate resolution of all such pending matters will not have a material adverse impact on our financial performance, financial position or liquidity. Taxes Matters: In 2021, the Romanian tax authorities issued a final assessment in the aggregate amount of approximately 31 million Romanian leu (approximately $7 at Q2 2026 period-end exchange rates), for additional income and value-added taxes for our Romanian subsidiary for the 2014 to 2018 tax years. In order to advance our case to the appeals phase and reduce or eliminate potential interest and penalties, we paid the Romanian tax authorities the full amount assessed in 2021 (without agreement to all or any portion of such assessment). We believe that our originally-filed tax return positions are in compliance with applicable Romanian tax laws and regulations, and continue to vigorously defend our position through all necessary appeals or other judicial processes. We are under examination by the Thailand tax authorities for tax years 2019 and 2020. The examination may lead to adjustments to our taxes with respect to the year under examination as well as other subsequent periods. In 2024, the Thailand tax authorities issued an assessment letter seeking to impose additional value-added taxes and surcharges in the aggregate amount of approximately 403 million Thai baht (approximately $12 at Q2 2026 period-end exchange rates) for our Thailand subsidiary for the 2019 tax year. We believe that our original positions with respect to the value-added taxes are in compliance with applicable Thailand tax laws and regulations, and continue to vigorously defend our position through all necessary appeals or other judicial processes. A bank guarantee has been issued for the maximum potential liability. In our major tax jurisdictions, we may be subject to income tax examinations for tax years from 2018 to present.

INVENTORIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
INVENTORIES - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Inventory Disclosure [Abstract]
Inventory write-down	$ 19.2	$ 12.8	$ 42.6	$ 29.3
Other current liabilities	$ 481.4		$ 481.4		$ 407.1

CREDIT FACILITIES - Narrative (Details) - Line of Credit - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Apr. 30, 2026	Mar. 31, 2026	Jun. 30, 2026
Minimum
Line of Credit Facility [Line Items]
Debt instrument, required prepayment, percentage of excess cash flow				0.00%
Maximum
Line of Credit Facility [Line Items]
Debt instrument, required prepayment, percentage of excess cash flow				50.00%
Secured Debt \| Term A Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 250,000			$ 250,000
Debt instrument, periodic payment, principal				$ 3,125
Secured Debt \| Term A Loan \| Variable Rate Component One \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.00%
Secured Debt \| Term A Loan \| Variable Rate Component One \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Secured Debt \| Term A Loan \| Variable Rate Component Two \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.05%
Secured Debt \| Term A Loan \| Variable Rate Component Two \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.75%
Secured Debt \| Term A Loan \| SOFR
Line of Credit Facility [Line Items]
Basis spread on variable rate				1.50%
Secured Debt \| Term A Loan \| Adjusted SOFR \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.50%
Secured Debt \| Term A Loan \| Adjusted SOFR \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate			2.25%
Secured Debt \| Term A Loan \| Base Rate \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.50%
Secured Debt \| Term A Loan \| Base Rate \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.25%
Secured Debt \| Term B Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	500,000			$ 500,000
Debt instrument, periodic payment, principal				$ 1,250
Secured Debt \| Term B Loan \| SOFR
Line of Credit Facility [Line Items]
Basis spread on variable rate				1.75%
Secured Debt \| Term B Loan \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate				0.75%
Secured Debt \| Refinanced Term A Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount			$ 250,000
Revolving Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,750,000		$ 750,000	$ 1,750,000
Accordion feature, increase limit	700,000			$ 700,000
Accordion feature, increase limit, percentage of total assets				10.00%
Revolving Facility \| Minimum
Line of Credit Facility [Line Items]
Commitment fee percentage		0.10%	0.30%
Revolving Facility \| Maximum
Line of Credit Facility [Line Items]
Commitment fee percentage		0.275%	0.45%
Revolving Facility \| Variable Rate Component One \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.00%	1.50%
Revolving Facility \| Variable Rate Component One \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%	2.25%
Revolving Facility \| Variable Rate Component Two \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.05%	0.50%
Revolving Facility \| Variable Rate Component Two \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		0.75%	1.25%
Revolving Facility \| SOFR
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.10%
Bridge Loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000			$ 100,000
Line of credit facility, term	10 days
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 300,000			$ 300,000

INCOME TAXES	6 Months Ended
INCOME TAXES	Jun. 30, 2026
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Interim period income tax expense or recovery is determined by multiplying the year-to-date earnings or losses before tax by management’s best estimate of the overall annual effective income tax rate, taking into account the tax effect of certain items recognized in the interim period. As a result, the effective income tax rates used in our interim financial statements may differ from management’s estimate of the annual effective tax rate for the annual financial statements. Our estimated annual effective income tax rate varies as the quarters progress, for various reasons, including as a result of the mix and volume of business in various tax jurisdictions within the Americas, Europe and Asia, in jurisdictions with tax holidays and tax incentives, and in jurisdictions for which a valuation allowance has been recognized to reduce net deferred tax assets to nil because management believes that it is more likely than not that the benefit will not be realized (i.e., based on our review of financial projections, no estimated future taxable profit will be available against which tax losses and deductible temporary differences could be utilized). Our annual effective income tax rate can also vary due to the impact of restructuring charges, foreign exchange fluctuations, operating losses, cash repatriations, and changes in our provisions related to tax uncertainties. Our Q2 2026 and 1H 2026 net income tax expense of $72.8 and $116.8, respectively, included tax expense related to Pillar Two global minimum tax legislation (GMT) of $9.0 and $16.2, respectively. Our Q2 2025 and 1H 2025 net income tax expense of $46.3 and $73.8, respectively, included withholding tax expense incurred to minimize the impact of GMT of $7.1 and $13.9, respectively. Our 1H 2025 net income tax expense also included a $3.0 of tax expense for tax uncertainties relating to one of our subsidiaries, offset in part by $1.9 of reversals of tax uncertainties relating to another of our subsidiaries.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
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-Topic 740
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-Name Accounting Standards Codification
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-Paragraph 1
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-Topic 740
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-Topic 946
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-Section S99
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (Tables)

6 Months Ended

Jun. 30, 2026

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Translation adjustments:
Opening balance of foreign currency translation account	$	(38.2)	$	(34.8)	$	(36.0)	$	(35.5)
Foreign currency translation adjustments	(1.8)		4.3		(4.0)		5.0
Closing balance of foreign currency translation account	$	(40.0)	$	(30.5)	$	(40.0)	$	(30.5)

Foreign exchange derivatives (i):
Opening balance of unrealized net gain (loss) on currency forward cash flow hedges	$	(6.2)	$	(3.1)	$	9.0	$	(9.4)
Net gain (loss) on currency forward cash flow hedges	(8.5)		18.6		(17.6)		21.2
Reclassification of net loss (gain) on currency forward cash flow hedges to operations	0.9		(3.4)		(5.2)		0.3
Closing balance of unrealized net gain (loss) on currency forward cash flow hedges	$	(13.8)	$	12.1	$	(13.8)	$	12.1

Interest rate swap derivatives (i):
Opening balance of unrealized net gain (loss) on interest rate swap cash flow hedges	$	(0.5)	$	(0.7)	$	(2.9)	$	1.4
Net gain (loss) on interest rate swap cash flow hedges	3.7		(1.0)		6.3		(2.6)
Reclassification of net gain on interest rate swap cash flow hedges to operations	(0.1)		(0.6)		(0.3)		(1.1)
Closing balance of unrealized net gain (loss) on interest rate swap cash flow hedges	$	3.1	$	(2.3)	$	3.1	$	(2.3)

Employment benefit (i):
Opening balance of pension and non-pension post-employment benefit account	$	27.1	$	22.9	$	28.2	$	25.9
Net loss on pension and non-pension post-employment benefit plans	(0.1)		(2.6)		(0.2)		(5.0)
Amortization of net gain on pension and non-pension post-employment benefit plans	(1.0)		(0.5)		(2.0)		(1.1)



Closing balance of pension and non-pension post-employment benefit account	$	26.0	$	19.8	$	26.0	$	19.8

Accumulated other comprehensive loss (AOCI), net of tax	$	(24.7)	$	(0.9)	$	(24.7)	$	(0.9)

(i) Amounts were net of immaterial tax.

INVENTORIES

6 Months Ended

Jun. 30, 2026

Inventory Disclosure [Abstract]

INVENTORIES

The components of inventories, net of applicable net realizable value write-downs, are as follows:


	June 30 2026		December 31 2025
Raw materials	$	2,705.9	$	1,783.1
Work in progress	236.1		144.6
Finished goods	459.7		260.3
	$	3,401.7	$	2,188.0

We recorded inventory write-downs of $19.2 and $42.6 for Q2 2026 and 1H 2026, respectively (Q2 2025 — $12.8; 1H 2025 — $29.3) in cost of sales.

We receive deposits from certain of our customers primarily to reduce risks related to excess and/or obsolete inventory. At June 30, 2026, our accrued and other current liabilities and provisions included $481.4 (December 31, 2025 — $407.1) of customer deposits.

RESTRUCTURING AND OTHER CHARGES (RECOVERIES) - Schedule of Restructuring and Other Charges, Net of Recoveries (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 2.9	$ 12.8	$ 5.1	$ 15.0
Transition Costs (Recoveries)	0.0	1.1	(3.4)	1.1
Acquisition costs	0.0	0.3	3.4	0.9
Other charges (recoveries)	0.0	0.3	(6.6)	1.4
Restructuring and other charges, net of recoveries	$ 2.9	$ 14.5	$ (1.5)	$ 18.4

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References + Details

MISCELLANEOUS EXPENSE (INCOME) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Other Income and Expenses [Abstract]
Components of net periodic benefit cost other than the service cost under pension and other post-employment benefit plans	$ (100)	$ 400	$ (300)	$ 500
Loss recognized on interest rate swaps	0	1,300	0	2,600
Gains on insurance claims settlement	(600)	0	(600)	0
Miscellaneous expense (income)	$ (700)	$ 1,700	$ (900)	$ 3,100

PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.6	$ 0.5	$ 1.2	$ 1.0
Interest cost	2.6	2.6	5.3	5.1
Expected return on plan assets	(2.5)	(2.5)	(5.1)	(5.0)
Amortization of net gain	(0.1)	0.0	(0.2)	(0.1)
Net periodic benefit cost	0.6	0.6	1.2	1.0
Other Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.0	0.8	2.1	1.6
Interest cost	0.8	0.8	1.5	1.5
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of net gain	(0.9)	(0.5)	(1.8)	(1.0)
Net periodic benefit cost	$ 0.9	$ 1.1	$ 1.8	$ 2.1

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (k)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Section 50
-Paragraph 5
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 5
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(1)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(2)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Subparagraph (j)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)(iv)(02)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
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-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-7

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 5
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 535.7	$ 595.6
Accounts receivable, net	3,338.2	2,638.1
Inventories	3,401.7	2,188.0
Other current assets	298.7	251.5
Total current assets	7,574.3	5,673.2
Property, plant and equipment, net	1,026.3	586.0
Operating lease right-of-use assets	152.7	124.1
Goodwill	332.9	333.1
Intangible assets, net	244.9	266.2
Deferred income taxes	206.2	156.4
Other non-current assets	250.3	74.1
Total assets	9,787.6	7,213.1
Current liabilities:
Current portion of borrowings under credit facility and finance lease obligations	26.4	26.0
Accounts payable	3,819.7	1,866.1
Accrued and other current liabilities and provisions	2,131.5	1,896.8
Income taxes payable	202.0	150.7
Total current liabilities	6,179.6	3,939.6
Long-term portion of borrowings under credit facility and finance lease obligations	784.0	750.5
Pension and non-pension post-employment benefit obligations	90.2	89.5
Other non-current liabilities and provisions	213.7	176.0
Deferred income taxes	40.5	41.2
Total liabilities	7,308.0	4,996.8
Equity:
Total equity	2,479.6	2,216.3
Total liabilities and equity	$ 9,787.6	$ 7,213.1

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Schedule of Derivatives not Designated as Hedging Instruments (Details) - Not Designated as Hedging Instrument, Economic Hedge - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent \| Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	$ 3.8	$ 5.5
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent \| TRS
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	94.3	7.2
Location, Statement of Financial Position, Balance [Axis]: cls:AccruedLiabilitiesAndOtherLiabilitiesAndProvisionsCurrent \| Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	12.3	2.9
Location, Statement of Financial Position, Balance [Axis]: cls:AccruedLiabilitiesAndOtherLiabilitiesAndProvisionsCurrent \| TRS
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	$ 0.0	$ 0.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement [Line Items]
Net earnings	$ 368.8	$ 211.0	$ 581.1	$ 297.2
Other comprehensive income (loss), net of tax
Loss related to defined benefit pension and non-pension post-employment benefit plans	(1.1)	(3.1)	(2.2)	(6.1)
Currency translation differences for foreign operations	(1.8)	4.3	(4.0)	5.0
Total other comprehensive income (loss), net of tax	(6.9)	14.8	(23.0)	16.7
Total comprehensive income	361.9	225.8	558.1	313.9
Foreign Exchange Forward
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on derivative hedges	(7.6)	15.2	(22.8)	21.5
Interest rate swap derivatives
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on derivative hedges	$ 3.6	$ (1.6)	$ 6.0	$ (3.7)

CAPITAL STOCK

6 Months Ended

Jun. 30, 2026

Share-Based Payment Arrangement [Abstract]

CAPITAL STOCK

Capital transactions:

Activities with respect to our capital stock for the periods indicated are set forth below:


Number of shares (in millions)			Common Shares
Issued and outstanding at December 31, 2024			116.1
Issued from treasury to settle vested SBC			0.1
Cancelled under normal course issuer bids (NCIB)			(1.2)
Issued and outstanding at June 30, 2025			115.0

Issued and outstanding at December 31, 2025			114.9
Issued from treasury to settle vested SBC			0.2
Cancelled under NCIB			(0.1)
Issued and outstanding at June 30, 2026			115.0

Common Share Repurchase Plans:

We have repurchased Common Shares in the open market, or as otherwise permitted, for cancellation through NCIBs, which allow us to repurchase a limited number of Common Shares during a specified period. The maximum number of Common Shares we are permitted to repurchase for cancellation under each NCIB is reduced by the number of Common Shares we arrange to be purchased by any non-independent broker in the open market during the term of such NCIB to satisfy delivery obligations under our SBC plans. We from time-to-time enter into automatic share purchase plans (ASPPs) with a broker, instructing the broker to purchase our Common Shares in the open market on our behalf, either for cancellation under an NCIB (NCIB ASPPs) or for delivery obligations under our SBC plans (SBC ASPPs), including during any applicable trading blackout periods, up to specified maximums (and subject to certain pricing and other conditions) through the term of each ASPP.

On October 30, 2024, the TSX accepted our notice to launch an NCIB (2024 NCIB), which allowed us to repurchase, at our discretion, from November 1, 2024 until the earlier of October 31, 2025 or the completion of purchases thereunder, up to approximately 8.6 million of our Common Shares in the open market, or as otherwise permitted, subject to the normal terms and limitations of such bids. One SBC ASPP and one NCIB ASPP were in effect during 1H 2025.

On October 29, 2025, the TSX accepted our notice to launch another NCIB (2025 NCIB), which allows us to repurchase, at our discretion, from November 3, 2025 until the earlier of November 2, 2026 or the completion of purchases thereunder, up to approximately 5.7 million of our Common Shares in the open market, or as otherwise permitted, subject to the normal terms and limitations of such bids. At June 30, 2026, approximately 5.5 million Common Shares remained available for repurchase under the 2025 NCIB either for cancellation or for SBC delivery purposes.

Information regarding Common Shares purchases in Q2 2026, 1H 2026 and respective prior year periods, for cancellation and for SBC plan delivery obligations (including under ASPPs) is set forth below:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Aggregate cost (including transaction fees and excluding share buyback taxes) of Common Shares repurchased for cancellation	$	—	$	40.0	$	20.0	$	115.0
Number of Common Shares repurchased for cancellation (in millions) (1)	—		0.6		0.1		1.2
Weighted average price per share for repurchases	$	—	$	70.48	$	273.60	$	94.05
Aggregate cost (including transaction fees) of Common Shares repurchased for delivery under SBC plans	$	—	$	—	$	—	$	221.6
Number of Common Shares repurchased for delivery under SBC plans (in millions) (2)	—		—		—		1.7

(1) For Q2 2025 and 1H 2025, includes 0.6 million Common Shares purchased for cancellation under NCIB ASPPs.

(2) Consists entirely of SBC ASPP purchases through an independent broker.

SBC:

From time to time, we pay cash to a broker to purchase Common Shares in the open market to satisfy delivery requirements under our SBC plans (see table above). In Q2 2026 and 1H 2026, we used 0.002 million Common Shares and 1.6 million Common Shares, respectively (Q2 2025 — 0.03 million; 1H 2025 — 2.0 million) to settle SBC awards. At June 30, 2026, the broker held 0.2 million Common Shares with a value of $20.7 (December 31, 2025 — 1.8 million Common Shares with a value of $153.8) for this purpose, which we report as treasury stock on our consolidated statements of changes in equity.

We grant restricted share units (RSUs) and performance share units (PSUs), and occasionally, stock options, to employees under our SBC plans. The majority of RSUs vest one-third per year over a three-year period. Stock options generally vest 25% per year over a four-year period. The number of outstanding PSUs that will actually vest varies from 0% to 200% of a target amount granted. The number of PSUs that will vest are based on the level of achievement of a pre-determined non-market performance measurement, subject to modification by our relative total shareholder return compared to a pre-defined group of companies, in each case over the relevant three-year performance period. We also granted deferred share units and director share units (collectively, DSUs), RSUs and Director RSUs (D-RSUs) to directors. DSUs vest upon retirement. D-RSUs vest on the first anniversary of the grant date, subject to continued service. See note 2(l) to the 2025 AFS for further detail.

Information regarding RSU, PSU, DSU and D-RSU grants to employees and directors, as applicable, for the periods indicated is set forth below (no stock options were granted in the periods below):


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
RSUs Granted:
Number of awards (in millions)	0.03		0.04		0.2		0.3
Weighted average grant date fair value per unit	$	423.30	$	112.21	$	304.70	$	119.55

PSUs Granted:
Number of awards (in millions, representing 100% of target)	—		0.02		0.1		0.2
Weighted average grant date fair value per unit	$	482.27	$	139.53	$	329.08	$	146.35

DSUs Granted:
Number of awards (in millions)	0.001		0.002		0.002		0.01
Weighted average grant date fair value per unit	$	342.67	$	152.67	$	282.41	$	103.83

D-RSUs Granted:
Number of awards (in millions)	0.01		—		0.01		—
Weighted average grant date fair value per unit	$	339.13	$	—	$	339.13	$	—

In Q2 2026 and 1H 2026, we made a cash payment of $0.8 and $326.3, respectively, for withholding taxes in connection with the SBC awards that vested during such periods (Q2 2025 — nil; 1H 2025 — $156.0).

We use the TRS agreement (TRS Agreement) to manage cash flow requirements and our exposure to fluctuations in the share price of our Common Shares in connection with the settlement of certain outstanding equity awards under our SBC plans. See note 14 for further detail.

Information regarding employee and director SBC expense and TRS FVAs (which represent changes in fair value of the TRS) for the periods indicated is set forth below:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Employee SBC expense in cost of sales	$	9.6	$	7.3	$	23.2	$	17.4
Employee SBC expense in SG&A	9.7		7.9		26.6		23.8
Total employee SBC expense	$	19.3	$	15.2	$	49.8	$	41.2

TRS FVAs: gains in cost of sales	$	(48.4)	$	(40.6)	$	(40.9)	$	(33.1)
TRS FVAs: gains in SG&A	(55.7)		(56.8)		(46.2)		(45.2)

Total TRS FVAs: gains	$	(104.1)	$	(97.4)	$	(87.1)	$	(78.3)

Combined effect of employee SBC expense and TRS FVAs	$	(84.8)	$	(82.2)	$	(37.3)	$	(37.1)

Director SBC expense in SG&A(1)	$	0.6	$	0.5	$	1.2	$	1.1

(1) Expense consists of director compensation to be settled with Common Shares, or Common Shares and cash.

LEASES

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

LEASES

The components of lease expense for the periods indicated are as follows:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Finance lease expense:
Amortization of ROU assets (i)	$	2.7	$	2.0	$	4.8	$	4.1
Interest on lease obligations (ii)	0.9		0.8		1.6		1.6
Operating lease expense (i)	12.2		10.3		24.5		20.6
Short-term lease expense and variable lease expense (i)	0.3		0.7		1.1		1.1

Total	$	16.1	$	13.8	$	32.0	$	27.4

(i) Recorded within either cost of sales or SG&A on the consolidated statements of operations based on the nature of the leased assets.

(ii) Recorded within finance costs on the consolidated statements of operations.

Other information related to leases:


	June 30 2026		December 31 2025
ROU assets:
Operating lease ROU assets	$	152.7	$	124.1
Finance lease ROU assets (included in property, plant & equipment, net)	65.8		49.0
Total ROU assets	$	218.5	$	173.1

Current portion of lease obligations:
Operating lease liability (included in accrued and other current liabilities and provisions)	$	32.5	$	31.6
Finance lease liability (included in current portion of borrowings under credit facility and finance lease obligations)	9.9		9.5
Long-term portion of lease obligations:
Operating lease liability (included in other non-current liabilities and provisions)	138.3		107.6
Finance lease liability (included in long-term portion of borrowings under credit facility and finance lease obligations)	65.6		48.5
Total lease obligations	$	246.3	$	197.2

LEASES

The components of lease expense for the periods indicated are as follows:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Finance lease expense:
Amortization of ROU assets (i)	$	2.7	$	2.0	$	4.8	$	4.1
Interest on lease obligations (ii)	0.9		0.8		1.6		1.6
Operating lease expense (i)	12.2		10.3		24.5		20.6
Short-term lease expense and variable lease expense (i)	0.3		0.7		1.1		1.1

Total	$	16.1	$	13.8	$	32.0	$	27.4

(i) Recorded within either cost of sales or SG&A on the consolidated statements of operations based on the nature of the leased assets.

(ii) Recorded within finance costs on the consolidated statements of operations.

Other information related to leases:


	June 30 2026		December 31 2025
ROU assets:
Operating lease ROU assets	$	152.7	$	124.1
Finance lease ROU assets (included in property, plant & equipment, net)	65.8		49.0
Total ROU assets	$	218.5	$	173.1

Current portion of lease obligations:
Operating lease liability (included in accrued and other current liabilities and provisions)	$	32.5	$	31.6
Finance lease liability (included in current portion of borrowings under credit facility and finance lease obligations)	9.9		9.5
Long-term portion of lease obligations:
Operating lease liability (included in other non-current liabilities and provisions)	138.3		107.6
Finance lease liability (included in long-term portion of borrowings under credit facility and finance lease obligations)	65.6		48.5
Total lease obligations	$	246.3	$	197.2

EARNINGS PER SHARE

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

EARNINGS PER SHARE

Basic and diluted earnings per share are calculated by dividing net earnings by the following weighted average number of shares:


	Three months ended June 30		Six months ended June 30
(in millions)	2026	2025	2026	2025
Basic weighted average number of shares outstanding	115.0	115.1	115.0	115.5
Diluted effect of outstanding awards under SBC plans	1.2	0.8	1.0	0.9
Diluted weighted average number of shares outstanding	116.2	115.9	116.0	116.4

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Schedule of Gain or (Loss) Reclassified from Accumulated OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Foreign currency contracts \| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivative Instruments, Gain (Loss) [Line Items]
Loss (Gain) Reclassified from AOCI into Income	$ 0.7	$ (2.6)	$ (6.0)	$ 1.1
Foreign currency contracts \| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Derivative Instruments, Gain (Loss) [Line Items]
Loss (Gain) Reclassified from AOCI into Income	0.8	(1.6)	1.7	(0.7)
Interest rate swap derivatives \| Location, Statement of Income, Balance [Axis]: us-gaap:InterestExpenseNonoperating
Derivative Instruments, Gain (Loss) [Line Items]
Loss (Gain) Reclassified from AOCI into Income	(0.1)	(1.9)	(0.3)	(3.7)
Interest rate swap derivatives \| Location, Statement of Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense
Derivative Instruments, Gain (Loss) [Line Items]
Loss (Gain) Reclassified from AOCI into Income	$ 0.0	$ 1.3	$ 0.0	$ 2.6

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

SEGMENT AND CUSTOMER REPORTING - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total revenue	$ 4,698.6	$ 2,893.4	$ 8,745.6	$ 5,542.0
Total Segment Costs	4,312.3	2,678.7	8,034.1	5,139.5
CCS
Segment Reporting [Line Items]
Total revenue	3,810.3	2,074.3	7,051.3	3,915.7
Cost of sales	3,374.0	1,829.6	6,252.4	3,460.2
Other segment costs	$ 106.4	$ 73.5	$ 191.8	$ 137.2
CCS \| Revenue from Contract with Customer, Segment Benchmark \| Segment Concentration Risk
Segment Reporting [Line Items]
% of total	81.00%	72.00%	81.00%	71.00%
CCS \| CCS, Communication Segment
Segment Reporting [Line Items]
Total revenue	$ 2,653.2	$ 1,641.2	$ 5,063.8	$ 3,068.9
CCS \| CCS, Communication Segment \| Revenue from Contract with Customer, Segment Benchmark \| Segment Concentration Risk
Segment Reporting [Line Items]
% of total	56.00%	57.00%	58.00%	56.00%
CCS \| CCS, Enterprise Segment
Segment Reporting [Line Items]
Total revenue	$ 1,157.1	$ 433.1	$ 1,987.5	$ 846.8
CCS \| CCS, Enterprise Segment \| Revenue from Contract with Customer, Segment Benchmark \| Segment Concentration Risk
Segment Reporting [Line Items]
% of total	25.00%	15.00%	23.00%	15.00%
ATS
Segment Reporting [Line Items]
Total revenue	$ 888.3	$ 819.1	$ 1,694.3	$ 1,626.3
Cost of sales	785.9	726.1	1,496.2	1,452.6
Other segment costs	$ 46.0	$ 49.5	$ 93.7	$ 89.5
ATS \| Revenue from Contract with Customer, Segment Benchmark \| Segment Concentration Risk
Segment Reporting [Line Items]
% of total	19.00%	28.00%	19.00%	29.00%

PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2026

Retirement Benefits [Abstract]

Schedule of Pension and Non-Pension Post-Employment Benefit Plans

The components of net periodic benefit cost for the periods indicated are as follows:


	Pension Plans				Other Benefits Plans				Pension Plans				Other Benefits Plans
	Three months ended June 30				Three months ended June 30				Six months ended June 30				Six months ended June 30
	2026		2025		2026		2025		2026		2025		2026		2025
Service cost	$	0.6	$	0.5	$	1.0	$	0.8	$	1.2	$	1.0	$	2.1	$	1.6
Interest cost	2.6		2.6		0.8		0.8		5.3		5.1		1.5		1.5
Expected return on plan assets	(2.5)		(2.5)		—		—		(5.1)		(5.0)		—		—

Amortization of net gain	(0.1)		—		(0.9)		(0.5)		(0.2)		(0.1)		(1.8)		(1.0)

Net periodic benefit cost	$	0.6	$	0.6	$	0.9	$	1.1	$	1.2	$	1.0	$	1.8	$	2.1

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Schedule of Derivatives Designated as Cash Flow Hedges (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within 12 months	$ (13.8)
Maximum length of time, foreign currency cash flow hedge	12 months
Interest rate swap derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within 12 months	$ 0.9
Maximum length of time, foreign currency cash flow hedge	3 years
Designated as Hedging Instrument \| Foreign currency contracts \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	$ 3.6	$ 12.1
Designated as Hedging Instrument \| Foreign currency contracts \| Location, Statement of Financial Position, Balance [Axis]: cls:AccruedLiabilitiesAndOtherLiabilitiesAndProvisionsCurrent
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	21.4	1.5
Designated as Hedging Instrument \| Interest rate swap derivatives \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	1.3	0.0
Designated as Hedging Instrument \| Interest rate swap derivatives \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	2.3	0.4
Designated as Hedging Instrument \| Interest rate swap derivatives \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	0.0	2.8
Designated as Hedging Instrument \| Interest rate swap derivatives \| Location, Statement of Financial Position, Balance [Axis]: cls:AccruedLiabilitiesAndOtherLiabilitiesAndProvisionsCurrent
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	$ 0.0	$ 0.0

ACCOUNTS RECEIVABLE (A/R), NET	6 Months Ended
ACCOUNTS RECEIVABLE (A/R), NET	Jun. 30, 2026
Receivables [Abstract]
ACCOUNTS RECEIVABLE (A/R), NET	ACCOUNTS RECEIVABLE (A/R), NET Allowance for credit losses: A/R is recorded net of allowance of $39.5 at June 30, 2026 (December 31, 2025 — $30.5). Contract assets: At June 30, 2026, our A/R balance included $325.4 (December 31, 2025 — $296.3) of contract assets recognized as revenue in accordance with our revenue recognition accounting policy.

- Definition

The entire disclosure for a transferor's continuing involvement in financial assets that it has transferred in a securitization or asset-backed financing arrangement, the nature of any restrictions on assets reported by an entity in its statement of financial position that relate to a transferred financial asset (including the carrying amounts of such assets), how servicing assets and servicing liabilities are reported, and (for securitization or asset-backed financing arrangements accounted for as sales) when a transferor has continuing involvement with the transferred financial assets and transfers of financial assets accounted for as secured borrowings, how the transfer of financial assets affects an entity's financial position, financial performance, and cash flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 108
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481296/860-20-55-108

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Operating activities:
Net earnings	$ 368.8	$ 211.0	$ 581.1	$ 297.2
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation and amortization	44.0	45.3	83.6	82.7
SBC	19.3	15.2	49.8	41.2
Total return swap (TRS) fair value adjustments	(104.1)	(97.4)	(87.1)	(78.3)
Restructuring and other charges (recoveries)	0.0	0.4	(10.0)	0.4
Unrealized losses on hedge derivatives	0.0	1.3	0.0	2.6
Deferred income taxes	(22.0)	(14.9)	(48.6)	(15.0)
Other	(3.7)	12.2	2.8	18.4
Changes in non-cash working capital items:
Accounts receivable	(170.8)	(151.9)	(700.1)	(218.8)
Inventories	(728.8)	(129.8)	(1,213.7)	(157.5)
Other current assets	(17.1)	(9.4)	12.7	(6.4)
Accounts payable, accrued and other current liabilities, provisions and income taxes payable	1,025.3	270.4	2,096.7	316.2
Net cash provided by operating activities	410.9	152.4	767.2	282.7
Investing activities:
Purchase of property, plant and equipment	(263.8)	(32.5)	(493.3)	(69.2)
Proceeds from sale of assets	0.0	0.0	11.1	0.0
Other	(2.5)	(2.5)	(2.5)	(2.5)
Net cash used in investing activities	(266.3)	(35.0)	(484.7)	(71.7)
Financing activities:
Borrowings under revolving loans	430.0	190.0	600.0	500.0
Repayments under revolving loans	(430.0)	(250.0)	(600.0)	(410.0)
Borrowings under term loans	250.0	0.0	250.0	0.0
Repayments under term loans	(229.3)	(4.3)	(233.7)	(8.7)
Principal payments of finance leases	(2.0)	(2.6)	(5.0)	(5.2)
Proceeds from issuance of capital stock	0.0	0.3	0.0	0.3
Repurchase of capital stock for cancellation	0.0	(40.0)	(22.6)	(117.7)
Purchase of treasury stock for SBC plans	0.0	0.0	0.0	(221.6)
Proceeds from TRS settlement	0.0	0.0	0.0	98.6
SBC cash settlement	(0.8)	0.0	(326.3)	(156.0)
Debt issuance costs paid	(4.8)	0.0	(4.8)	(0.2)
Net cash provided by (used in) financing activities	13.1	(106.6)	(342.4)	(320.5)
Net increase (decrease) in cash and cash equivalents	157.7	10.8	(59.9)	(109.5)
Cash and cash equivalents, beginning of period	378.0	303.0	595.6	423.3
Cash and cash equivalents, end of period	535.7	313.8	535.7	313.8
Supplemental disclosure information:
Interest paid	20.8	12.5	39.3	27.3
Net income taxes paid	74.7	50.6	145.5	56.2
Non-cash investing activity:
Unpaid purchases of property, plant and equipment at end of period	$ 180.0	$ 31.4	$ 180.0	$ 31.4

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2025

Statement [Line Items]

Repurchase of capital stock for cancellation

$ 40.7

^[1]

$ 116.9

^[2]

2025 NCIB

Statement [Line Items]

Repurchase of capital stock for cancellation

$ 40.0

$ 115.0

[1]	Consists of $40.0 paid to repurchase common shares for cancellation during the second quarter of 2025 and accrued share buyback taxes (see note 8).
[2]	Consists of $115.0 paid to repurchase common shares for cancellation during the first half of 2025 and accrued share buyback taxes (see note 8).

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References + Details

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Statement [Abstract]
Revenue	$ 4,698.6	$ 2,893.4	$ 8,745.6	$ 5,542.0
Cost of sales	4,121.1	2,522.4	7,730.9	4,897.1
Gross profit	577.5	371.0	1,014.7	644.9
Selling, general and administrative expenses	58.1	38.9	175.5	151.4
Research and development	46.3	34.0	87.5	51.6
Amortization of intangible assets	11.9	11.1	22.8	22.2
Restructuring and other charges (recoveries)	2.9	14.5	(1.5)	18.4
Earnings from operations	458.3	272.5	730.4	401.3
Finance costs	21.2	14.4	39.2	29.4
Interest income	(3.8)	(0.9)	(5.8)	(2.2)
Miscellaneous expense (income)	(0.7)	1.7	(0.9)	3.1
Earnings before income taxes	441.6	257.3	697.9	371.0
Income tax expense (recovery)
Current	94.8	61.2	165.4	88.8
Deferred	(22.0)	(14.9)	(48.6)	(15.0)
Income tax expense	72.8	46.3	116.8	73.8
Net earnings	$ 368.8	$ 211.0	$ 581.1	$ 297.2
Earnings per share:
Basic (in dollars per share)	$ 3.21	$ 1.83	$ 5.05	$ 2.57
Diluted (in dollars per share)	$ 3.17	$ 1.82	$ 5.01	$ 2.55
Weighted-average shares used in computing per share amounts (in millions):
Basic (in shares)	115.0	115.1	115.0	115.5
Diluted (in shares)	116.2	115.9	116.0	116.4

LEASES (Tables)

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

Schedule of Components of Leases and Other Lease Information

The components of lease expense for the periods indicated are as follows:


	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Finance lease expense:
Amortization of ROU assets (i)	$	2.7	$	2.0	$	4.8	$	4.1
Interest on lease obligations (ii)	0.9		0.8		1.6		1.6
Operating lease expense (i)	12.2		10.3		24.5		20.6
Short-term lease expense and variable lease expense (i)	0.3		0.7		1.1		1.1

Total	$	16.1	$	13.8	$	32.0	$	27.4

(i) Recorded within either cost of sales or SG&A on the consolidated statements of operations based on the nature of the leased assets.

(ii) Recorded within finance costs on the consolidated statements of operations.

Other information related to leases:


	June 30 2026		December 31 2025
ROU assets:
Operating lease ROU assets	$	152.7	$	124.1
Finance lease ROU assets (included in property, plant & equipment, net)	65.8		49.0
Total ROU assets	$	218.5	$	173.1

Current portion of lease obligations:
Operating lease liability (included in accrued and other current liabilities and provisions)	$	32.5	$	31.6
Finance lease liability (included in current portion of borrowings under credit facility and finance lease obligations)	9.9		9.5
Long-term portion of lease obligations:
Operating lease liability (included in other non-current liabilities and provisions)	138.3		107.6
Finance lease liability (included in long-term portion of borrowings under credit facility and finance lease obligations)	65.6		48.5
Total lease obligations	$	246.3	$	197.2

SEGMENT AND CUSTOMER REPORTING (Tables)

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

Information regarding each reportable segment for the periods indicated is set forth below:


Revenue by segment:	Three months ended June 30								Six months ended June 30
	2026				2025				2026				2025
			% of total				% of total				% of total				% of total
CCS
Communications	$	2,653.2	56	%	$	1,641.2	57	%	$	5,063.8	58	%	$	3,068.9	56	%
Enterprise	1,157.1		25	%	433.1		15	%	1,987.5		23	%	846.8		15	%
	$	3,810.3	81	%	$	2,074.3	72	%	$	7,051.3	81	%	$	3,915.7	71	%

ATS	888.3		19	%	819.1		28	%	1,694.3		19	%	1,626.3		29	%

Total revenue	$	4,698.6			$	2,893.4			$	8,745.6			$	5,542.0


Segment Costs by segment:	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
CCS cost of sales	$	3,374.0	$	1,829.6	$	6,252.4	$	3,460.2
CCS other Segment Costs	106.4		73.5		191.8		137.2
ATS cost of sales	785.9		726.1		1,496.2		1,452.6
ATS other Segment Costs	46.0		49.5		93.7		89.5
Total Segment Costs	$	4,312.3	$	2,678.7	$	8,034.1	$	5,139.5

Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated


Segment income, segment margin, and reconciliation of segment income to earnings before income taxes:		Three months ended June 30								Six months ended June 30
	Note	2026				2025				2026				2025
				Segment Margin				Segment Margin				Segment Margin				Segment Margin
CCS segment income and margin		$	329.9	8.7	%	$	171.2	8.3	%	$	607.1	8.6	%	$	318.3	8.1	%
ATS segment income and margin		56.4		6.3	%	43.5		5.3	%	104.4		6.2	%	84.2		5.2	%
Total segment income		386.3				214.7				711.5				402.5
Reconciling items:
Finance costs		21.2				14.4				39.2				29.4
Interest income		(3.8)				(0.9)				(5.8)				(2.2)
Miscellaneous expense (income)	11	(0.7)				1.7				(0.9)				3.1

Employee SBC expense		19.3				15.2				49.8				41.2
TRS fair value adjustment (TRS FVA): gains		(104.1)				(97.4)				(87.1)				(78.3)
Amortization of intangible assets (excluding computer software)		9.9				9.9				19.9				19.9
Restructuring and other charges (recoveries)	10	2.9				14.5				(1.5)				18.4
Earnings before income taxes		$	441.6			$	257.3			$	697.9			$	371.0

- Definition

Tabular disclosure of segment reporting. Includes, but is not limited to, reconciliation of reportable segment amount to corresponding consolidated total.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26A

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

MISCELLANEOUS EXPENSE (INCOME)

6 Months Ended

Jun. 30, 2026

Other Income and Expenses [Abstract]

MISCELLANEOUS EXPENSE (INCOME)

The components of miscellaneous expense (income) for the periods indicated are as follows:


		Three months ended June 30				Six months ended June 30
	Note	2026		2025		2026		2025
Components of net periodic benefit cost other than the service cost under pension and other post-employment benefit plans	12	$	(0.1)	$	0.4	$	(0.3)	$	0.5

Loss recognized on interest rate swaps	14	—		1.3		—		2.6
Gains on insurance claims settlement		(0.6)		—		(0.6)		—

		$	(0.7)	$	1.7	$	(0.9)	$	3.1

INVENTORIES (Tables)

6 Months Ended

Jun. 30, 2026

Inventory Disclosure [Abstract]

Schedule of Inventory

The components of inventories, net of applicable net realizable value write-downs, are as follows:


	June 30 2026		December 31 2025
Raw materials	$	2,705.9	$	1,783.1
Work in progress	236.1		144.6
Finished goods	459.7		260.3
	$	3,401.7	$	2,188.0

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
RON in Millions, $ in Millions

USD ($)

Capital stock

USD ($)

Treasury stock

USD ($)

Additional paid-in capital

USD ($)

Retained earnings

USD ($)

Retained earnings

RON

Accumulated other comprehensive income (loss)

USD ($)

Beginning balance at Dec. 31, 2024

$ 1,896.0

$ 1,632.8

$ (92.9)

$ 797.5

$ (423.8)

$ (17.6)

^[1]

Capital transactions:

Issuance of capital stock

0.3

5.9

(5.6)

Repurchase of capital stock for cancellation

^[2]

(116.9)

(17.2)

(99.7)

Purchase of treasury stock for SBC plans

(221.6)

Stock-based compensation (SBC)

(113.8)

112.3

(226.1)

Total comprehensive income:

Net earnings for the period

297.2

Other comprehensive income (loss)

16.7

^[1]

Ending balance at Jun. 30, 2025

1,757.9

1,621.5

(202.2)

466.1

(126.6)

(0.9)

^[1]

Beginning balance at Mar. 31, 2025

1,556.8

1,628.7

(205.6)

487.0

(337.6)

(15.7)

^[1]

Capital transactions:

Issuance of capital stock

0.3

0.8

(0.5)

Repurchase of capital stock for cancellation

^[3]

(40.7)

(8.0)

(32.7)

Stock-based compensation (SBC)

15.7

3.4

12.3

Total comprehensive income:

Net earnings for the period

211.0

Other comprehensive income (loss)

14.8

^[1]

Ending balance at Jun. 30, 2025

1,757.9

1,621.5

(202.2)

466.1

(126.6)

(0.9)

^[1]

Beginning balance at Dec. 31, 2025

2,216.3

1,619.8

(153.8)

343.3

408.7

(1.7)

^[4]

Capital transactions:

Issuance of capital stock

0.0

5.3

(5.3)

Repurchase of capital stock for cancellation

(20.0)

(1.0)

(19.0)

Stock-based compensation (SBC)

(274.8)

133.1

(300.1)

RON (107.8)

Total comprehensive income:

Net earnings for the period

581.1

Other comprehensive income (loss)

(23.0)

^[4]

Ending balance at Jun. 30, 2026

2,479.6

1,624.1

(20.7)

18.9

882.0

(24.7)

^[4]

Beginning balance at Mar. 31, 2026

2,098.2

1,623.7

(20.9)

0.0

513.2

(17.8)

^[4]

Capital transactions:

Issuance of capital stock

0.0

0.4

(0.4)

Stock-based compensation (SBC)

19.5

0.2

19.3

Total comprehensive income:

Net earnings for the period

368.8

Other comprehensive income (loss)

(6.9)

^[4]

Ending balance at Jun. 30, 2026

$ 2,479.6

$ 1,624.1

$ (20.7)

$ 18.9

$ 882.0

$ (24.7)

^[4]

[1]	Accumulated other comprehensive income (loss) is net of tax (see note 9).
[2]	Consists of $115.0 paid to repurchase common shares for cancellation during the first half of 2025 and accrued share buyback taxes (see note 8).
[3]	Consists of $40.0 paid to repurchase common shares for cancellation during the second quarter of 2025 and accrued share buyback taxes (see note 8).
[4]	Accumulated other comprehensive income (loss) is net of tax (see note 9).

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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-Section 65
-Paragraph 4
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-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/exampleRef
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Reference 9: http://www.xbrl.org/2003/role/exampleRef
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Reference 10: http://www.xbrl.org/2003/role/exampleRef
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Reference 11: http://www.xbrl.org/2003/role/exampleRef
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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References + Details

MISCELLANEOUS EXPENSE (INCOME) (Tables)

6 Months Ended

Jun. 30, 2026

Other Income and Expenses [Abstract]

Schedule of Components of Miscellaneous Expense (Income)

The components of miscellaneous expense (income) for the periods indicated are as follows:


		Three months ended June 30				Six months ended June 30
	Note	2026		2025		2026		2025
Components of net periodic benefit cost other than the service cost under pension and other post-employment benefit plans	12	$	(0.1)	$	0.4	$	(0.3)	$	0.5

Loss recognized on interest rate swaps	14	—		1.3		—		2.6
Gains on insurance claims settlement		(0.6)		—		(0.6)		—

		$	(0.7)	$	1.7	$	(0.9)	$	3.1

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
INCOME TAXES (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Tax Disclosure [Abstract]
Income tax expense	$ 72.8	$ 46.3	$ 116.8	$ 73.8
Withholding tax expense, Pillar Two, global minimum tax	$ 9.0	$ 7.1	$ 16.2	13.9
Tax expense for tax uncertainties				3.0
Reversals of tax uncertainties expense				$ 1.9

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT

6 Months Ended

Jun. 30, 2026

Financial Instruments and Risk Management [Abstract]

FINANCIAL INSTRUMENTS AND RISK MANAGEMENT

Our financial assets are comprised primarily of cash and cash equivalents, A/R, and derivatives used for hedging purposes. Our financial liabilities are comprised primarily of accounts payable, certain accrued and other liabilities, the Term Loans, borrowings under the Revolver, lease obligations, and derivatives used for hedging purposes.

Currency risk:

The majority of our currency risk is driven by operational costs, including income tax expense, incurred in local currencies by our subsidiaries. We cannot predict changes in currency exchange rates, the impact of exchange rate changes on our operating results, nor the degree to which we will be able to manage the impact of currency exchange rate changes. Such changes could have a material effect on our business, financial performance and financial condition. We enter into foreign currency forward contracts and swaps to hedge our foreign currency risk related to anticipated future cash flows, monetary assets and monetary liabilities denominated in foreign currencies.

Equity price risk:

We are party to the TRS Agreement with a third-party bank to manage our cash flow requirements and exposure to fluctuations in the price of our Common Shares in connection with the settlement of certain outstanding equity awards under our SBC plans. The TRS Agreement provides for automatic annual one-year extensions (subject to specified conditions), and may be terminated (in whole or in part) by either party at any time. The value of the TRS Agreement is determined by comparing the market price of our Common Shares to the fixed price paid by the counterparty for such shares (Strike Price). The counterparty under the TRS Agreement is obligated to make a payment to us upon its termination (in whole or in part) or expiration (Settlement) based on the increase (if any) in the value of the TRS Agreement over its term, in exchange for periodic payments made by us based on SOFR plus a specified margin applied to the Equity Notional Amount (defined in the TRS Agreement, as an amount equal to the product of (i) the number of Common Shares then subject to the TRS Agreement (notional quantity) multiplied by (ii) the Strike Price in effect). Similarly, if the value of the TRS Agreement decreases over its term, we are obligated to pay the counterparty the amount of such decrease upon Settlement. The TRS Agreement does not qualify for hedge accounting.

At June 30, 2026, our TRS Agreement had a notional quantity of 1.25 million Common Shares (December 31, 2025 — 1.25 million Common Shares).

In each of December 2025 and March 2025, we re-struck our TRS Agreement at a Strike Price of $288.87 per share and $91.58 per share, respectively, and received $246.6 and $98.6 from the counterparty, respectively, each of which was recorded in cash provided by financing activities in our consolidated statements of cash flows.

Interest rate risk:

Borrowings under the Credit Facility expose us to interest rate risk due to the potential variability of market interest rates (see note 7). In order to partially hedge against our exposure to interest rate variability on our Term Loans, we are party to various agreements with third-party banks to swap the variable interest rate with a fixed rate of interest for a portion of the borrowings thereunder. At June 30, 2026, associated with the Term A Loan, we had: (i) interest rate swaps with $80.0 notional amount expiring in June 2027; (ii) interest rate swaps with $40.0 notional amount expiring in June 2029; and (iii) interest rate swaps with $80.0 notional amount commencing June 2027 and expiring in June 2029. At June 30, 2026, associated with the Term B Loan, we had: (i) interest rate swaps with $230.0 notional amount expiring in June 2027; and (ii) interest rate swaps with $230.0 notional amount commencing in June 2027 and expiring in June 2029.

At June 30, 2026, the interest rate risk related to $390.0 of borrowings under the Credit Facility was unhedged, consisting of unhedged amounts outstanding under the Term Loans ($130.0 under the Term A Loan and $260.0 under the Term B Loan). See note 7.

Interest rate swaps are designated as cash flow hedges when the hedge relationship is effective and meets the hedge accounting criteria.

Our TRS Agreement exposes us to interest rate risk as interest payments on our TRS Agreement are based on a variable interest rate (see above).

Credit risk:

Credit risk refers to the risk that a counterparty may default on its contractual obligations resulting in a financial loss to us. We believe our credit risk of counterparty non-performance continues to be relatively low. We are in regular contact with our customers, suppliers and logistics providers to assess counterparty credit-related non-performance. If a key supplier (or any company within such supplier's supply chain) or customer fails to comply with their contractual obligations, this could result in a significant financial loss to us. We would also suffer a significant financial loss if an institution from which we purchased foreign currency exchange contracts and swaps, interest rate swaps, or annuities for our pension plans, or the counterparty to our TRS Agreement, defaults on their contractual obligations. With respect to our financial market activities, we have adopted a policy of dealing only with counterparties we deem to be creditworthy to help mitigate the risk of financial loss from defaults. Adjustments are made to our allowance for credit losses each period in connection with our ongoing credit risk assessments. See note 4.

Liquidity risk:

Liquidity risk is the risk that we may not have cash available to satisfy our financial obligations as they come due. We manage liquidity risk through maintenance of cash on hand and access to the various financing arrangements described in note 4 to our 2025 AFS and note 7 herein.

Hedging activities:

The tables below present information regarding the fair values of derivative instruments and the effects of derivative instruments on our consolidated financial statements:

Derivatives not designated as hedging instruments (economic hedges):


	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance sheet classification	June 30 2026		December 31 2025		Balance sheet classification	June 30 2026		December 31 2025
Foreign currency contracts	Other current assets	$	3.8	$	5.5	Other current liabilities	$	12.3	$	2.9
TRS	Other current assets	94.3		7.2		Other current liabilities	—		—


Loss (Gain) Recognized in Income	Three months ended June 30				Six months ended June 30
	2026		2025		2026		2025
Foreign currency contracts
Cost of sales	$	3.1	$	—	$	5.3	$	(0.3)
SG&A	3.7		(0.4)		9.3		2.2

TRS (see note 8)
Cost of sales	(48.4)		(40.6)		(40.9)		(33.1)
SG&A	(55.7)		(56.8)		(46.2)		(45.2)

Derivatives designated as cash flow hedges:


	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance sheet classification	June 30 2026		December 31 2025		Balance sheet classification		June 30 2026		December 31 2025
Foreign currency contracts (i)	Other current assets	$	3.6	$	12.1	Other current liabilities		$	21.4	$	1.5
Interest rate swaps (ii)	Other current assets	1.3		—		Other current liabilities		—		—
Interest rate swaps (ii)	Other non-current assets	2.3		0.4		Other non-current liabilities		—		2.8


Loss (Gain) Reclassified from AOCI into Income	Three months ended June 30				Six months ended June 30
(see note 9 for activities recorded in AOCI for the periods indicated)	2026		2025		2026		2025

Foreign currency contracts

Cost of sales	$	0.7	$	(2.6)	$	(6.0)	$	1.1
SG&A	0.8		(1.6)		1.7		(0.7)


Interest rate swaps
Finance costs	$	(0.1)	$	(1.9)	$	(0.3)	$	(3.7)
Miscellaneous expense	—		1.3		—		2.6