0001030894-23-000008 | 20-F | XBRL Viewer

cls_WeightedAverageFairValueAtTheGrantDate

$ 8.60

cls_WeightedAverageFairValueAtTheGrantDate

8.36

cls_WeightedAverageFairValueAtTheGrantDate

12.17

cls_WeightedAverageFairValueAtTheGrantDate

9.88

cls_WeightedAverageFairValueAtTheGrantDate

9.49

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_WeightedAverageFairValueAtTheGrantDate

$ 14.27

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

$ (15,600,000)

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

(87,100,000)

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

(102,700,000)

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

(6,000,000.0)

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

(64,000,000.0)

Defined Benefit Plan, Amounts For Asset (Liability) Recognized In Statement Of Financial Position

cls_DefinedBenefitPlanAmountsForAssetLiabilityRecognizedInStatementOfFinancialPosition

(70,000,000.0)

cls_OtherCommitment1

25,300,000

cls_OtherCommitment1

20,600,000

cls_OtherCommitment1

15,600,000

cls_OtherCommitment1

12,200,000

cls_OtherCommitment1

11,400,000

cls_OtherCommitment1

18,000,000.0

cls_OtherCommitment1

103,100,000

cls_RightOfUseAssetForeignExchangeAndOther

(300,000)

cls_RightOfUseAssetForeignExchangeAndOther

(2,300,000)

cls_RightOfUseAssetForeignExchangeAndOther

cls_RightOfUseAssetForeignExchangeAndOther

(2,600,000)

cls_RightOfUseAssetForeignExchangeAndOther

cls_RightOfUseAssetForeignExchangeAndOther

(2,200,000)

cls_RightOfUseAssetForeignExchangeAndOther

(100,000)

Deferred Tax Expense (Income) Recognised In Profit Or Loss, Deferred Tax Liabilities

cls_RightOfUseAssetForeignExchangeAndOther

(2,300,000)

cls_DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilities

(200,000)

Deferred Tax Expense (Income) Recognised In Profit Or Loss, Deferred Tax Liabilities

cls_DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilities

200,000

Deferred Tax Expense (Income) Recognised In Profit Or Loss, Deferred Tax Liabilities

cls_DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilities

(5,000,000.0)

Deferred Tax Expense (Income) Recognised In Profit Or Loss, Deferred Tax Liabilities

cls_DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilities

(2,400,000)

Deferred Tax Expense (Income) Recognised In Profit Or Loss, Deferred Tax Liabilities

cls_DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilities

$ (7,400,000)

Repayments Of Borrowings, Percentage Of Specified Excess Cash Flow

cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow

0.00%

Repayments Of Borrowings, Percentage Of Specified Excess Cash Flow

cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow

50.00%

Disclosure Of Defined Benefit Plan Expense Recognized In Profit Or Loss Explanatory [Table Text Block]

cls_DisclosureOfDefinedBenefitPlanExpenseRecognizedInProfitOrLossExplanatoryTableTextBlock

The following table outlines the net expense recognized in our consolidated statement of operations for pension and non-pension post-employment benefit plans:


	Pension Plans Year ended December 31						Other Benefit Plans Year ended December 31
	2020		2021		2022		2020		2021		2022
Current service cost	$	1.9	$	2.5	$	0.3	$	3.2	$	3.4	$	3.1
Net interest cost	0.5		0.4		0.4		2.4		2.4		2.7
Past service cost (credit) and settlement/curtailment losses	(0.8)		—		—		2.3		0.3		—
Plan administrative expenses and other	1.1		1.3		0.6		—		—		—
	2.7		4.2		1.3		7.9		6.1		5.8
Defined contribution pension plan expense (note 18(c))	10.6		11.6		12.3		—		—		—
Total expense for the year	$	13.3	$	15.8	$	13.6	$	7.9	$	6.1	$	5.8

Reclassification Adjustments On Gain (Loss) On Purchase Of Annuities Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnPurchaseOfAnnuitiesRecognizedInOtherComprehensiveIncomeNetOfTax

$ 200,000

Reclassification Adjustments On Gain (Loss) On Purchase Of Annuities Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnPurchaseOfAnnuitiesRecognizedInOtherComprehensiveIncomeNetOfTax

Reclassification Adjustments On Gain (Loss) On Purchase Of Annuities Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnPurchaseOfAnnuitiesRecognizedInOtherComprehensiveIncomeNetOfTax

Deferred Tax Relating To Business Combinations, Deferred Tax Liabilities

cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities

30,700,000

Deferred Tax Relating To Business Combinations, Deferred Tax Liabilities

cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxLiabilities

30,700,000

Adjustments For Increase (Decrease) In Trade Accounts Payable, Accrued And Other Current Liabilities And Provisions

cls_AdjustmentsForIncreaseDecreaseInTradeAccountsPayableAccruedAndOtherCurrentLiabilitiesAndProvisions

117,000,000.0

Adjustments For Increase (Decrease) In Trade Accounts Payable, Accrued And Other Current Liabilities And Provisions

cls_AdjustmentsForIncreaseDecreaseInTradeAccountsPayableAccruedAndOtherCurrentLiabilitiesAndProvisions

556,900,000

Adjustments For Increase (Decrease) In Trade Accounts Payable, Accrued And Other Current Liabilities And Provisions

cls_AdjustmentsForIncreaseDecreaseInTradeAccountsPayableAccruedAndOtherCurrentLiabilitiesAndProvisions

$ 813,400,000

Disclosure Of Detailed Information About Accumulated Other Comprehensive Income Explanatory [Table Text Block]

cls_DisclosureOfDetailedInformationAboutAccumulatedOtherComprehensiveIncomeExplanatoryTableTextBlock


		Year ended December 31
	Note	2020		2021		2022
Opening balance of foreign currency translation account		$	(14.6)	$	(10.3)	$	(18.0)
Foreign currency translation adjustments		4.3		(7.7)		(6.7)
Closing balance		(10.3)		(18.0)		(24.7)

Opening balance of unrealized net gain (loss) on currency forward cash flow hedges		$	3.1	$	11.6	$	(1.9)
Net gain (loss) on currency forward cash flow hedges(i)		9.0		(5.3)		(5.9)
Reclassification of net loss (gain) on currency forward cash flow hedges to operations(ii)		(0.5)		(8.2)		13.1
Closing balance(iii)		11.6		(1.9)		5.3

Opening balance of unrealized net loss on interest rate swap cash flow hedges		$	(12.1)	$	(16.5)	$	(6.9)
Net gain (loss) on interest rate swap cash flow hedges(iv)		(12.8)		2.4		18.1
Reclassification of net loss on interest rate swap cash flow hedges to operations		8.4		7.2		2.5
Closing balance(v)		(16.5)		(6.9)		13.7

Actuarial gains (losses) on pension and non-pension post-employment benefit plans	18	$	(9.1)	$	9.3	$	33.5
Reclassification of actuarial losses (gains) to deficit		9.1		(9.3)		(33.5)
Loss on purchase of pension annuities	18	(0.2)		—		—
Reclassification of loss on purchase of pension annuities to deficit	18	0.2		—		—
Closing balance		—		—		—

Accumulated other comprehensive loss		$	(15.2)	$	(26.8)	$	(5.7)

(i) Net of an income tax recovery of $1.6 for 2022 (2021 — net of a $0.5 income tax recovery; 2020 — net of a $0.8 income tax expense).

(ii) Net of a $2.2 release in income tax recovery associated with the reclassification of net hedge (gain) loss to the consolidated statements of operations for 2022 (2021 — net release of $0.6 in income tax expense; 2020 — net of nil income tax expense).

(iii) Net of an income tax expense of $0.5 as of December 31, 2022 (December 31, 2021 — net of a $0.1 income tax recovery; December 31, 2020 — net of $1.0 in income tax expense).

(iv) Net of an income tax expense of $5.0 for 2022 (2021 and 2020 — net of nil income tax expense).

(v) Net of an income tax expense of $5.0 as of December 31, 2022 (December 31, 2021 and December 31, 2020 — net of nil income tax expense).

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Liabilities

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilities

$ 200,000

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Liabilities

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilities

(200,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Liabilities

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilities

(1,700,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Liabilities

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilities

(700,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Liabilities

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilities

(2,400,000)

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

(3,100,000)

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

300,000

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

(2,800,000)

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

400,000

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

900,000

Deferred Tax Relating To Other, Deferred Tax Liabilities

cls_DeferredTaxRelatingToOtherDeferredTaxLiabilities

1,300,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Interest Expense

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnInterestExpense

6,300,000

Other Non-current Assets Recognised As Of Acquisition Date

cls_OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate

6,900,000

Other Comprehensive Income, Net of Tax, Gain (Loss) on Purchase Of Annuities

cls_OtherComprehensiveIncomeNetofTaxGainLossonPurchaseOfAnnuities

(200,000)

Other Comprehensive Income, Net of Tax, Gain (Loss) on Purchase Of Annuities

cls_OtherComprehensiveIncomeNetofTaxGainLossonPurchaseOfAnnuities

Other Comprehensive Income, Net of Tax, Gain (Loss) on Purchase Of Annuities

cls_OtherComprehensiveIncomeNetofTaxGainLossonPurchaseOfAnnuities

Reclassification Adjustments On Gain (Loss) On Defined Benefit Plan Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnDefinedBenefitPlanRecognizedInOtherComprehensiveIncomeNetOfTax

9,100,000

Reclassification Adjustments On Gain (Loss) On Defined Benefit Plan Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnDefinedBenefitPlanRecognizedInOtherComprehensiveIncomeNetOfTax

(9,300,000)

Reclassification Adjustments On Gain (Loss) On Defined Benefit Plan Recognized In Other Comprehensive Income, Net Of Tax

cls_ReclassificationAdjustmentsOnGainLossOnDefinedBenefitPlanRecognizedInOtherComprehensiveIncomeNetOfTax

(33,500,000)

Quarterly Repayments Of Borrowings, Classified As Financing Activities

cls_QuarterlyRepaymentsOfBorrowingsClassifiedAsFinancingActivities

4,562,500

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

300,000

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

300,000

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

700,000

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

Right-Of-Use Assets, Write Down Of Assets And Lease Terminations

cls_RightOfUseAssetsWriteDownOfAssetsAndLeaseTerminations

700,000

Hedged Item, Subject To Cancellation, Liabilities

cls_HedgedItemSubjectToCancellationLiabilities

50,000,000.0

cls_UnhedgedItemsLiabilities

297,200,000

cls_UnhedgedItemsLiabilities

180,400,000

cls_UnhedgedItemsLiabilities

116,800,000

cls_UnhedgedItemsLiabilities

460,400,000

cls_UnhedgedItemsLiabilities

195,400,000

Line Of Credit Facility, Maximum Borrowing Capacity1

cls_UnhedgedItemsLiabilities

265,000,000.0

cls_LineOfCreditFacilityMaximumBorrowingCapacity1

$ 600,000,000.0

Shares Repurchased During Period, Shares

cls_SharesRepurchasedDuringPeriodShares

6,200.0000

Shares Repurchased During Period, Shares

cls_SharesRepurchasedDuringPeriodShares

4,400,000

Shares Repurchased During Period, Shares

cls_SharesRepurchasedDuringPeriodShares

3,400,000

Employer Direct Benefit Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectBenefitPaymentsNetDefinedBenefitLiabilityAsset

$ (1,400,000)

Employer Direct Benefit Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectBenefitPaymentsNetDefinedBenefitLiabilityAsset

(100,000)

Employer Direct Benefit Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectBenefitPaymentsNetDefinedBenefitLiabilityAsset

(1,700,000)

Employer Direct Benefit Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectBenefitPaymentsNetDefinedBenefitLiabilityAsset

(2,400,000)

Employer Direct Settlement Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectSettlementPaymentsNetDefinedBenefitLiabilityAsset

Employer Direct Settlement Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectSettlementPaymentsNetDefinedBenefitLiabilityAsset

Employer Direct Settlement Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectSettlementPaymentsNetDefinedBenefitLiabilityAsset

(1,100,000)

Employer Direct Settlement Payments, Net Defined Benefit Liability (Asset)

cls_EmployerDirectSettlementPaymentsNetDefinedBenefitLiabilityAsset

$ 0

Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Annual Fees Paid To Board Of Directors, Cash

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash

0.00%

Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Annual Fees Paid To Board Of Directors, Cash

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash

25.00%

Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Annual Fees Paid To Board Of Directors, Cash

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsCash

50.00%

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

$ 0

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

(1,100,000)

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

1,100,000

Settlement Payments From Employer, Net Defined Benefit Liability (Asset)

cls_SettlementPaymentsFromEmployerNetDefinedBenefitLiabilityAsset

Income Tax Expense (Benefit), Reversal Of Tax Uncertainties Of Subsidiary

cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary

(4,900,000)

Income Tax Expense (Benefit), Reversal Of Tax Uncertainties Of Subsidiary

cls_IncomeTaxExpenseBenefitReversalOfTaxUncertaintiesOfSubsidiary

(5,700,000)

Lease Liability Under IFRS 16

cls_LeaseLiabilityUnderIFRS16

138,600,000

Lease Liability Under IFRS 16

cls_LeaseLiabilityUnderIFRS16

162,400,000

Borrowings And Lease Liabilities

cls_BorrowingsAndLeaseLiabilities

794,400,000

Borrowings And Lease Liabilities

cls_BorrowingsAndLeaseLiabilities

$ 786,100,000

Line of Credit Facility, Commitment Fee Percentage1

cls_LineofCreditFacilityCommitmentFeePercentage1

0.30%

Line of Credit Facility, Commitment Fee Percentage1

cls_LineofCreditFacilityCommitmentFeePercentage1

0.45%

Line of Credit Facility, Commitment Fee Percentage1

cls_LineofCreditFacilityCommitmentFeePercentage1

0.35%

Line of Credit Facility, Commitment Fee Percentage1

cls_LineofCreditFacilityCommitmentFeePercentage1

0.50%

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

$ 1,400,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

100,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

1,700,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

2,400,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

1,400,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

100,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

1,700,000

Payments From Employer, Net Defined Benefit Liability (Asset)

cls_PaymentsFromEmployerNetDefinedBenefitLiabilityAsset

2,400,000

Income Tax Expense (Income), Impact Of Foreign Exchange Translation

cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation

3,500,000

Income Tax Expense (Income), Impact Of Foreign Exchange Translation

cls_IncomeTaxExpenseIncomeImpactOfForeignExchangeTranslation

$ (5,100,000)

Contractual Obligation, Fiscal Year Maturity [Table Text Block]

srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock

At December 31, 2022, the aggregate remaining mandatory principal repayments under the Credit Facility are as follows (assuming no further mandatory principal repayments are required based on ECF or net cash proceeds):


	Total		2023		2024		2025		2026
Initial Term Loan	$	280.4	$	—	$	—	$	280.4	$	—
Incremental Term Loan (i)	$	346.8	$	18.25	$	18.25	$	18.25	$	292.0

(i) This assumes that the conditions required for a December 2026 maturity date are satisfied. If such conditions are not satisfied, the Incremental Term Loan matures (and all amounts outstanding thereunder are payable) on March 28, 2025.

Net Deferred Tax Assets Relating To Subsidiary

cls_NetDeferredTaxAssetsRelatingToSubsidiary

$ 5,000,000.0

Net Deferred Tax Assets Relating To Subsidiary

cls_NetDeferredTaxAssetsRelatingToSubsidiary

4,900,000

Net Deferred Tax Assets Relating To Subsidiary

cls_NetDeferredTaxAssetsRelatingToSubsidiary

8,300,000

Tax Expense (Income) Relating To Current And Future Withholding Taxes On Undistributed Foreign Earnings

cls_TaxExpenseIncomeRelatingToCurrentAndFutureWithholdingTaxesOnUndistributedForeignEarnings

18,300,000

Tax Rate Effect Of Revaluation Impact

cls_TaxRateEffectOfRevaluationImpact

7,600,000

Income Tax Expense (Benefit), RTP Adjustments Related To Prior Years

cls_IncomeTaxExpenseBenefitRTPAdjustmentsRelatedToPriorYears

(4,100,000)

Income Tax Expense (Benefit), Recognition Of Deferred Tax Assets Of Subsidiary

cls_IncomeTaxExpenseBenefitRecognitionOfDeferredTaxAssetsOfSubsidiary

$ (2,600,000)

Income Tax Incentive, Exemption Term, Incentive Three

cls_IncomeTaxIncentiveExemptionTermIncentiveThree

6 years

Tax Effect From Tax Incentives

cls_TaxEffectFromTaxIncentives

$ 21,000,000

Tax Effect From Tax Incentives

cls_TaxEffectFromTaxIncentives

15,000,000

Tax Effect From Tax Incentives

cls_TaxEffectFromTaxIncentives

10,000,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

300,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

2,200,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

300,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

300,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

1,800,000

Debt Issuance Costs, Line of Credit Arrangements, Net1

cls_DebtIssuanceCostsLineofCreditArrangementsNet1

Accounts Receivable And Other Current Assets Recognised As Of Acquisition Date

cls_AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate

68,900,000

Borrowing Facilities, Accelerated Amortization Of Deferred Financing Costs

cls_BorrowingFacilitiesAcceleratedAmortizationOfDeferredFinancingCosts

2,600,000

Non-current Portion Of Borrowings And Lease Liabilities

cls_NoncurrentPortionOfBorrowingsAndLeaseLiabilities

742,900,000

Non-current Portion Of Borrowings And Lease Liabilities

cls_NoncurrentPortionOfBorrowingsAndLeaseLiabilities

$ 733,900,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent

1.00%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent

1.00%

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

6,200.0000

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

4,370,000

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

3,140,000

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

Term of Strategic Plan

cls_TermOfStrategicPlan

3 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

Growth Rate Used To Extrapolate Cash Flow Projections, Term

cls_GrowthRateUsedToExtrapolateCashFlowProjectionsTerm

5 years

cls_UndiscountedLeasePaymentsToBePaid

$ 42,700,000

cls_UndiscountedLeasePaymentsToBePaid

30,900,000

cls_UndiscountedLeasePaymentsToBePaid

25,500,000

cls_UndiscountedLeasePaymentsToBePaid

21,200,000

cls_UndiscountedLeasePaymentsToBePaid

15,900,000

cls_UndiscountedLeasePaymentsToBePaid

56,900,000

Non-current Provisions And Other Non-current Liabilities

cls_UndiscountedLeasePaymentsToBePaid

193,100,000

cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities

39,800,000

Non-current Provisions And Other Non-current Liabilities

cls_NoncurrentProvisionsAndOtherNoncurrentLiabilities

32,500,000

Tax Effect Of Exchange Differences On Translation

cls_TaxEffectOfExchangeDifferencesOnTranslation

(8,600,000)

Tax Effect Of Exchange Differences On Translation

cls_TaxEffectOfExchangeDifferencesOnTranslation

1,200,000

Tax Effect Of Exchange Differences On Translation

cls_TaxEffectOfExchangeDifferencesOnTranslation

5,700,000

Current Borrowings And Lease Liabilities

cls_CurrentBorrowingsAndLeaseLiabilities

51,500,000

Current Borrowings And Lease Liabilities

cls_CurrentBorrowingsAndLeaseLiabilities

52,200,000

Stock Issued During Period, Value, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation

400,000

Stock Issued During Period, Value, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation

100,000

Stock Issued During Period, Value, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodValueTreasuryStockReissuedSharebasedCompensation

$ 2,200,000

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

20,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

20,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

50,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

10,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued, Share-based Compensation

cls_StockIssuedDuringPeriodSharesTreasuryStockReissuedSharebasedCompensation

300,000

cls_PaymentOfFinancingCostsAndWaiverFees

$ 29,500,000

^[1]

cls_PaymentOfFinancingCostsAndWaiverFees

26,000,000.0

^[1]

cls_PaymentOfFinancingCostsAndWaiverFees

50,000,000.0

^[1]

cls_PaymentOfFinancingCostsAndWaiverFees

50,000,000.0

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_PaymentOfFinancingCostsAndWaiverFees

26,000,000.0

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

(9,300,000)

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

9,300,000

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

33,500,000

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

(9,300,000)

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

9,300,000

Other Comprehensive Income, Net Of Tax, Gain (Loss) On Defined Benefit Plans

cls_OtherComprehensiveIncomeNetOfTaxGainLossOnDefinedBenefitPlans

33,500,000

Expense Relating To Short-Term Leases And Low-Value Leases

cls_ExpenseRelatingToShortTermLeasesAndLowValueLeases

3,700,000

Expense Relating To Short-Term Leases And Low-Value Leases

cls_ExpenseRelatingToShortTermLeasesAndLowValueLeases

1,500,000

Expense Relating To Short-Term Leases And Low-Value Leases

cls_ExpenseRelatingToShortTermLeasesAndLowValueLeases

$ 1,800,000

Number Of Votes Per Share

cls_NumberOfVotesPerShare

Number Of Votes Per Share

cls_NumberOfVotesPerShare

Payments To Acquire Or Redeem Entity's Shares For Stock-based Plans

cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans

$ 19,100,000

Payments To Acquire Or Redeem Entity's Shares For Stock-based Plans

cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans

20,600,000

Payments To Acquire Or Redeem Entity's Shares For Stock-based Plans

cls_PaymentsToAcquireOrRedeemEntitysSharesForStockbasedPlans

$ 44,900,000

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Numerator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Numerator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Numerator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator

Treasury Stock, Value, Acquired, Cost Method, Held By Trustee

cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee

$ 15,700,000

Treasury Stock, Value, Acquired, Cost Method, Held By Trustee

cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee

15,100,000

Treasury Stock, Value, Acquired, Cost Method, Held By Trustee

cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee

$ 16,700,000

Number of Participants Of Retirement Benefit Plan Receiving Benefits, Percentage

cls_NumberofParticipantsOfRetirementBenefitPlanReceivingBenefitsPercentage

1.00%

Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement

cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement

$ (200,000)

Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement

cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement

(200,000)

Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement

cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement

Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement

cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement

$ 0

Disclosure Of Information Of The Net Book Value Of Right-Of-Use Asset [Table Text Block]

cls_DisclosureOfInformationOfTheNetBookValueOfRightOfUseAssetTableTextBlock

The following table details the changes to the net book value of ROU assets during the periods shown:


	Land		Buildings		Other		Total
Balance — January 1, 2021	$	7.1	$	91.7	$	2.2	$	101.0
Additions (i)	0.1		42.1		0.4		42.6
Additions through business combination (note 3)	4.3		0.8		—		5.1
Depreciation	(0.5)		(31.0)		(0.5)		(32.0)
Write-down of assets and lease terminations(ii)	—		(0.3)		—		(0.3)
Foreign exchange and other	(0.3)		(2.3)		—		(2.6)
Balance — December 31, 2021	10.7		101.0		2.1		113.8
Additions (i)	—		63.0		0.4		63.4

Depreciation	(0.6)		(34.3)		(0.5)		(35.4)
Write-down of assets and lease terminations(ii)	—		(0.7)		—		(0.7)
Foreign exchange and other	—		(2.2)		(0.1)		(2.3)
Balance — December 31, 2022	$	10.1	$	126.8	$	1.9	$	138.8

(i) Represents new leases and lease renewals as result of extension of lease terms. Additions for 2021 were reduced by $0.4 in tenant improvement allowances that we received in connection with a building lease for one of our Atrenne sites.

(ii) Represents the write-down (in each case as restructuring charges) of certain ROU assets in connection with restructuring actions. See note 15(a).

Disclosure Of Detailed Information About Other Expense Explanatory [Table Text Block]

cls_DisclosureOfDetailedInformationAboutOtherExpenseExplanatoryTableTextBlock


	Year ended December 31
	2020		2021		2022
Restructuring charges, net of recoveries (a)	$	25.8	$	10.5	$	8.4


Transition Costs (Recoveries) (b)	—		1.2		(2.1)
Credit Facility-related charges (c)	—		3.0		—
Acquisition Costs (Recoveries) and Other (d)	(2.3)		(4.4)		0.4
	$	23.5	$	10.3	$	6.7

Percentage Of Plan Assets Held With Financial Institutions With A Rating Of A- Or Above

cls_PercentageOfPlanAssetsHeldWithFinancialInstitutionsWithARatingOfAOrAbove

92.00%

cls_PlanAssetsDecreaseDueToRestrictions

$ 900,000

cls_PlanAssetsDecreaseDueToRestrictions

1,600,000

cls_PlanAssetsDecreaseDueToRestrictions

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_PlanAssetsDecreaseDueToRestrictions

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

800,000

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

3,100,000

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

3,900,000

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

10,100,000

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

2,000,000.0

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

12,100,000

Impairment Loss Recognized In Profit Or Loss And Disposals, Property, Plant And Equipment

cls_ImpairmentLossRecognizedInProfitOrLossAndDisposalsPropertyPlantAndEquipment

$ (8,100,000)

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

0.00%

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

200.00%

Debt Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

3.00%

Debt Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

4.00%

cls_BusinessTransitionCostsRecoveries

$ 0

cls_BusinessTransitionCostsRecoveries

1,200,000

cls_BusinessTransitionCostsRecoveries

(2,100,000)

cls_BusinessTransitionCostsRecoveries

1,500,000

Equity Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_BusinessTransitionCostsRecoveries

$ (3,600,000)

cls_EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

2.00%

Equity Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

3.00%

cls_AcceleratedAmortizationOfFinancingCosts

$ 0

cls_AcceleratedAmortizationOfFinancingCosts

3,000,000.0

cls_AcceleratedAmortizationOfFinancingCosts

Insurance Annuities, Amount Contributed To Fair Value Of Plan Assets

cls_AcceleratedAmortizationOfFinancingCosts

2,600,000

cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets

328,700,000

Insurance Annuities, Amount Contributed To Fair Value Of Plan Assets

cls_InsuranceAnnuitiesAmountContributedToFairValueOfPlanAssets

182,000,000.0

Acquisition Costs and Other Adjustments

cls_AcquisitionCostsAndOtherAdjustments

(2,300,000)

Acquisition Costs and Other Adjustments

cls_AcquisitionCostsAndOtherAdjustments

(4,400,000)

Acquisition Costs and Other Adjustments

cls_AcquisitionCostsAndOtherAdjustments

$ 400,000

Insurance Annuities, Amount Contributed To Fair Value of Plan Assets, Allocation Percentage

cls_InsuranceAnnuitiesAmountContributedToFairValueofPlanAssetsAllocationPercentage

91.00%

Insurance Annuities, Amount Contributed To Fair Value of Plan Assets, Allocation Percentage

cls_InsuranceAnnuitiesAmountContributedToFairValueofPlanAssetsAllocationPercentage

85.00%

Other Assets, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_OtherAssetsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

4.00%

Other Assets, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage

cls_OtherAssetsAmountContributedToFairValueOfPlanAssetsAllocationPercentage

8.00%

Inventory Write Down, Percentage Related To Specified Aged Inventory

cls_InventoryWriteDownPercentageRelatedToSpecifiedAgedInventory

66.67%

cls_TreasuryStockSharesAcquired1

2,900,000

cls_TreasuryStockSharesAcquired1

1,900,000

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_TreasuryStockSharesAcquired1

3,900,000

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

$ (1,600,000)

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

(500,000)

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

800,000

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

5,000,000.0

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToGainsLossesOnCashFlowHedgesOfOtherComprehensiveIncome

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

800,000

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

600,000

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

(1,100,000)

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

(1,300,000)

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

(600,000)

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

Administrative Expenses, Net Defined Benefit Liability (Asset)

cls_AdministrativeExpensesNetDefinedBenefitLiabilityAsset

$ 0

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

3.80%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

1.10%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

1.10%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

4.60%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

4.60%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease1

4.60%

Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year1

cls_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear1

5.30%

Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year1

cls_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear1

5.20%

Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year1

cls_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear1

5.10%

Defined Benefit Plan, Ultimate Health Care Cost Trend Rate2

cls_DefinedBenefitPlanUltimateHealthCareCostTrendRate2

4.00%

Defined Benefit Plan, Ultimate Health Care Cost Trend Rate2

cls_DefinedBenefitPlanUltimateHealthCareCostTrendRate2

4.00%

Defined Benefit Plan, Ultimate Health Care Cost Trend Rate2

cls_DefinedBenefitPlanUltimateHealthCareCostTrendRate2

4.00%

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

$ 7,200,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

2,100,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

(3,200,000)

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

2,700,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

8,800,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

13,700,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

2,800,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

(10,700,000)

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

17,400,000

Deferred Tax Income (Expense), Recognised In Profit Or Loss, Deferred Tax Assets

cls_DeferredTaxIncomeExpenseRecognisedInProfitOrLossDeferredTaxAssets

23,200,000

Income Tax Relating To Reclassification Of Net Gain (Loss) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome

(2,200,000)

Income Tax Relating To Reclassification Of Net Gain (Loss) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome

(600,000)

Income Tax Relating To Reclassification Of Net Gain (Loss) On Cash Flow Hedges Of Other Comprehensive Income

cls_IncomeTaxRelatingToReclassificationOfNetGainLossOnCashFlowHedgesOfOtherComprehensiveIncome

$ 0

Disclosure Of Amounts Recognized In Balance Sheet Explanatory [Table Text Block]

cls_DisclosureOfAmountsRecognizedInBalanceSheetExplanatoryTableTextBlock

The following table outlines the plan balances as reported on our consolidated balance sheets:


	December 31, 2021						December 31, 2022
	Pension Plans		Other Benefit Plans		Total		Pension Plans		Other Benefit Plans		Total
Pension and non-pension post-employment benefit obligations	$	(20.7)	$	(86.8)	$	(107.5)	$	(13.1)	$	(63.9)	$	(77.0)
Current other post-employment benefit obligations	—		(0.3)		(0.3)		—		(0.1)		(0.1)
Non-current net pension assets (note 9)	5.1		—		5.1		7.1		—		7.1

	$	(15.6)	$	(87.1)	$	(102.7)	$	(6.0)	$	(64.0)	$	(70.0)

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

$ 1,100,000

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

1,100,000

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

4,400,000

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

400,000

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

(5,100,000)

Deferred Tax Relating To Items Credited (Charged) Directly To Equity, Deferred Tax Assets

cls_DeferredTaxRelatingToItemsCreditedChargedDirectlyToEquityDeferredTaxAssets

(300,000)

Deferred Tax Relating To Business Combinations, Deferred Tax Asset

cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxAsset

100,000

Deferred Tax Relating To Business Combinations, Deferred Tax Asset

cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxAsset

1,000,000.0

Deferred Tax Relating To Business Combinations, Deferred Tax Asset

cls_DeferredTaxRelatingToBusinessCombinationsDeferredTaxAsset

$ 1,100,000

Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period2

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardRequisiteServicePeriod2

3 years

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

$ (100,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

200,000

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(500,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(400,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(500,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(1,900,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(200,000)

Increase (Decrease) Through Net Exchange Differences, Deferred Tax Assets

cls_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssets

(2,600,000)

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

(3,100,000)

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

300,000

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

(2,800,000)

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

900,000

Deferred Tax Relating To Other, Deferred Tax Assets

cls_DeferredTaxRelatingToOtherDeferredTaxAssets

$ 900,000

Share Price

cls_SharePrice

$ 7.45

Share Price

cls_SharePrice

8.21

Share Price

cls_SharePrice

$ 10.45

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Benefit Obligations

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnBenefitObligations

1.00%

Defined Benefit Plan Disclosure [Table Text Block]

cls_DefinedBenefitPlanDisclosureTableTextBlock

We made the following plan contributions for the years indicated below and estimate our contribution for 2023 to be as follows:


	Year ended December 31						Estimated Contribution*
	2020		2021		2022		2023
Defined contribution plan	$	10.6	$	11.6	$	12.3	$	12.3
Defined benefit plan	5.1		6.1		4.1		3.2
Total	$	15.7	$	17.7	$	16.4	$	15.5

Non-pension post-employment benefit plans (i)	$	7.8	$	3.6	$	3.2	$	4.3

* Our actual contributions could differ materially from these estimates.

(i) Contributions for 2020 include higher settlement payments than in 2021 and 2022 as a result of higher employee terminations in connection with our restructuring actions during the year. See note 15(a).

Option Life, Shares Granted, Term

cls_OptionLifeSharesGrantedTerm

7 years

Amortisation, Intangible Assets Acquired Through Business Combination Other Than Goodwill

cls_AmortisationIntangibleAssetsAcquiredThroughBusinessCombinationOtherThanGoodwill

$ 18,000,000

Schedule Of Additional Information Of Expenses [Table Text Block]

cls_ScheduleOfAdditionalInformationOfExpensesTableTextBlock

Items included in our cost of sales and SG&A for the years indicated are set forth below:


	Year ended December 31
	2020		2021		2022
Employee-related costs	$	810.7	$	819.4	$	955.8
SBC expense included in above employee-related costs	25.8		33.4		51.0
Freight and transportation costs	107.9		142.5		186.1
Depreciation expense (i)	99.1		100.8		104.6
Rental expense (i)	4.5		2.4		3.0

(i) The amortization of ROU assets is included in depreciation expense. See note 7. We expense the costs of low-value and short-term leases in our consolidated statement of operations on a straight-line basis as rental expense. See note 11 for disclosure of these lease expenses.

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

$ 100,000

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

35,900,000

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

34,600,000

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

100,000

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

35,900,000

Payments To Acquire Or Redeem Entity's Shares For Cancellation

cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation

$ 34,600,000

Treasury Stock, Shares, Acquired, Held By Trustee

cls_TreasuryStockSharesAcquiredHeldByTrustee

2,400,000

Treasury Stock, Shares, Acquired, Held By Trustee

cls_TreasuryStockSharesAcquiredHeldByTrustee

1,400,000

Treasury Stock, Shares, Acquired, Held By Trustee

cls_TreasuryStockSharesAcquiredHeldByTrustee

1,500,000

Percentage Of Entities Property, Plant And Equipment

cls_PercentageOfEntitiesPropertyPlantAndEquipment

11.00%

Percentage Of Entities Property, Plant And Equipment

cls_PercentageOfEntitiesPropertyPlantAndEquipment

16.00%

Percentage Of Entities Property, Plant And Equipment

cls_PercentageOfEntitiesPropertyPlantAndEquipment

18.00%

Percentage Of Entities Property, Plant And Equipment

cls_PercentageOfEntitiesPropertyPlantAndEquipment

22.00%

Percentage Of Entities Property, Plant And Equipment

cls_PercentageOfEntitiesPropertyPlantAndEquipment

25.00%

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percentage of Shares Vested Dependent on Performance Achievements

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsPercentageofSharesVestedDependentonPerformanceAchievements

0.00%

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percentage of Shares Vested Dependent on Performance Achievements

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsPercentageofSharesVestedDependentonPerformanceAchievements

200.00%

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percentage of Shares Vested Dependent on Performance Achievements

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsPercentageofSharesVestedDependentonPerformanceAchievements

100.00%

Number Of Manufacturing Facilities

cls_NumberOfManufacturingFacilities

Share-Based Compensation By Share-Based Payment Award, Performance Period

cls_ShareBasedCompensationByShareBasedPaymentAwardPerformancePeriod

3 years

Percentage Of Entities Intangible Assets And Goodwill

cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill

49.00%

Percentage Of Entities Intangible Assets And Goodwill

cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill

48.00%

Percentage Of Entities Intangible Assets And Goodwill

cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill

42.00%

Percentage Of Entities Intangible Assets And Goodwill

cls_PercentageOfEntitiesIntangibleAssetsAndGoodwill

42.00%

Share-Based Payment Award, TSR Modifier, Premium

cls_ShareBasedPaymentAwardTSRModifierPremium

116.00%

Share-Based Payment Award, TSR Modifier, Premium

cls_ShareBasedPaymentAwardTSRModifierPremium

109.00%

Share-Based Payment Award, TSR Modifier, Premium

cls_ShareBasedPaymentAwardTSRModifierPremium

112.00%

Number Of Sites

cls_NumberOfSites

Release Of Indirect Tax Liabilities Previously Recorded In Connection With A Previous Acquisition Recognized In Acquisition Costs

cls_ReleaseOfIndirectTaxLiabilitiesPreviouslyRecordedInConnectionWithAPreviousAcquisitionRecognizedInAcquisitionCosts

$ 1,200,000

cls_AcquisitionRelatedCostsForPotentialAcquisitions

$ 200,000

Expected Volatility, Other Equity Instruments Granted

cls_ExpectedVolatilityOtherEquityInstrumentsGranted

30.00%

Expected Volatility, Other Equity Instruments Granted

cls_ExpectedVolatilityOtherEquityInstrumentsGranted

49.00%

Expected Volatility, Other Equity Instruments Granted

cls_ExpectedVolatilityOtherEquityInstrumentsGranted

52.00%

Disclosure Of Derecognition Of Financial Assets [Text Block]

cls_DisclosureOfDerecognitionOfFinancialAssetsTextBlock

ACCOUNTS RECEIVABLE:

A/R sales program and supplier financing programs (SFPs):

We are party to an A/R sales program agreement with a third-party bank to sell up to $405.0 (as amended in September 2022 to increase the previous limit of $300.0) in A/R on an uncommitted, revolving basis, subject to pre-determined limits by customer. This agreement provides for automatic annual one-year extensions (and was so extended in March 2022 and 2023). This agreement may be terminated at any time by the bank or by us upon 3 months’ prior notice, or by the bank upon specified defaults. We are required to comply with covenants, including those relating to the fulfillment of payment obligations and restrictions on the sale, assignment or creation of liens, with respect to A/R sold under this agreement. At December 31, 2022 and December 31, 2021, we were in compliance with these covenants. Under our A/R sales program, we continue to collect cash from our customers and remit amounts collected to the bank weekly.

As of December 31, 2022, we participate in three customer SFPs, one with a CCS segment customer and two with ATS segment customers (including a PCI customer commencing in November 2021). Pursuant to the SFPs, we sell A/R from the relevant customer to third-party banks on an uncommitted basis. The SFPs have indefinite terms and may be terminated at any time by the customer or by us upon specified prior notice. We utilize the SFPs to substantially offset the effect of extended payment terms required by these customers on our working capital for the period. Under our SFPs, the third-party banks collect the relevant receivables directly from the customers.

At December 31, 2022, we sold $245.6 of A/R (December 31, 2021 — $45.8) under our A/R sales program and $105.6 of A/R (December 31, 2021 — $98.0) under our SFPs.

The A/R sold under each of these programs are de-recognized from our A/R balance, and the proceeds are reflected as cash provided by operating activities in our consolidated statement of cash flows. Upon sale, we assign the rights to the A/R to the banks. A/R are sold net of discount charges, which are recorded as finance costs in our consolidated statement of operations.

Contract assets:

At December 31, 2022, our A/R balance included $292.9 (December 31, 2021 — $253.5) of contract assets recognized as revenue in accordance with our revenue recognition accounting policy.

Expected Life, Other Equity Instruments Granted

cls_ExpectedLifeOtherEquityInstrumentsGranted

3 years

Expected Life, Other Equity Instruments Granted

cls_ExpectedLifeOtherEquityInstrumentsGranted

3 years

Expected Life, Other Equity Instruments Granted

cls_ExpectedLifeOtherEquityInstrumentsGranted

3 years

Reduction Of Right-Of-Use Assets, Tenant Improvement Allowances

cls_ReductionOfRightOfUseAssetsTenantImprovementAllowances

$ 400,000

Number Of Supplier Financing Programs

cls_NumberOfSupplierFinancingPrograms

Risk Free Interest Rate, Other Equity Instruments Granted

cls_RiskFreeInterestRateOtherEquityInstrumentsGranted

1.40%

Risk Free Interest Rate, Other Equity Instruments Granted

cls_RiskFreeInterestRateOtherEquityInstrumentsGranted

0.20%

Risk Free Interest Rate, Other Equity Instruments Granted

cls_RiskFreeInterestRateOtherEquityInstrumentsGranted

1.40%

Disclosure Of Current Inventory [Table Text Block]

cls_DisclosureOfCurrentInventoryTableTextBlock

Inventories are comprised of the following:


	December 31
	2021		2022
Raw materials	$	1,585.8	$	2,130.6
Work in progress	71.2		84.1
Finished goods	40.0		135.6
	$	1,697.0	$	2,350.3

Equity Instruments Other Than Options, Granted In Period, Percentage Of Target

cls_EquityInstrumentsOtherThanOptionsGrantedInPeriodPercentageOfTarget

100.00%

Equity Instruments Other Than Options, Granted In Period, Percentage Of Target

cls_EquityInstrumentsOtherThanOptionsGrantedInPeriodPercentageOfTarget

100.00%

Equity Instruments Other Than Options, Granted In Period, Percentage Of Target

cls_EquityInstrumentsOtherThanOptionsGrantedInPeriodPercentageOfTarget

100.00%

Cash Acquired In Connection With Acquisition As Of Acquisition Date

cls_CashAcquiredInConnectionWithAcquisitionAsOfAcquisitionDate

$ 11,400,000

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

3 years

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

5 years

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

4 years

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

15 years

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

1 year

Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period

cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod

10 years

cls_AcquisitionRelatedCostsRecognizedAsExpenseForTransactionRecognizedSeparatelyFromAcquisitionOfAssetsAndAssumptionsOfLiabilitiesInBusinessCombinationNet

$ 6,100,000

Disclosure Of Defined Benefit Plan Expense Recognized In Other Comprehensive Income Explanatory [Table Text Block]

cls_DisclosureOfDefinedBenefitPlanExpenseRecognizedInOtherComprehensiveIncomeExplanatoryTableTextBlock

The following table outlines the gains and losses, net of tax, recognized in OCI and reclassified directly to deficit for the years shown:


	Year ended December 31
	2020		2021		2022
Cumulative losses, beginning of year	$	77.7	$	87.0	$	77.7
Loss on pension annuity purchases (see note 18(a))	0.2		—		—
Actuarial losses (gains) recognized during the year (i)	9.1		(9.3)		(33.5)
Cumulative losses, end of year (ii)	$	87.0	$	77.7	$	44.2

(i) Including a $5.0 income tax recovery for 2022 (2021 — nil ; 2020 — net of a $0.4 income tax recovery).

(ii) Net of income tax recovery of $6.5 as at December 31, 2022 (December 31, 2021 and December 31, 2020 — net of a $1.5 income tax recovery).

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod

4 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod

3 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod

3 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod

3 years

cls_CumulativeGainLossOnDefinedBenefitPlans

$ (77,700,000)

cls_CumulativeGainLossOnDefinedBenefitPlans

(87,000,000.0)

cls_CumulativeGainLossOnDefinedBenefitPlans

(77,700,000)

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_CumulativeGainLossOnDefinedBenefitPlans

(44,200,000)

cls_AcquisitionRelatedCostsReversalOfCostReleaseOfIndirectTaxLiabilities

$ 1,200,000

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

300,000

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

30,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

70,000.00

Stock Issued During Period, Shares, Treasury Stock Reissued1

cls_StockIssuedDuringPeriodSharesTreasuryStockReissued1

Cash Restructure Charges

cls_CashRestructureCharges

$ 7,500,000

Cash Restructure Charges

cls_CashRestructureCharges

9,800,000

Cash Restructure Charges

cls_CashRestructureCharges

$ 23,300,000

Percentage Of Entity's Profit (Loss) From Operating Activities

cls_PercentageOfEntitysProfitLossFromOperatingActivities

3.30%

Percentage Of Entity's Profit (Loss) From Operating Activities

cls_PercentageOfEntitysProfitLossFromOperatingActivities

4.50%

Percentage Of Entity's Profit (Loss) From Operating Activities

cls_PercentageOfEntitysProfitLossFromOperatingActivities

4.70%

Percentage Of Entity's Profit (Loss) From Operating Activities

cls_PercentageOfEntitysProfitLossFromOperatingActivities

3.50%

Percentage Of Entity's Profit (Loss) From Operating Activities

cls_PercentageOfEntitysProfitLossFromOperatingActivities

3.90%

Payment Of Debt Issuance Costs

cls_PaymentOfDebtIssuanceCosts

$ 800,000

Payment Of Debt Issuance Costs

cls_PaymentOfDebtIssuanceCosts

3,600,000

Payment Of Debt Issuance Costs

cls_PaymentOfDebtIssuanceCosts

600,000

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

(5,000,000.0)

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

(400,000)

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

(6,500,000)

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

(1,500,000)

Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income

cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome

$ (1,500,000)

Useful Lives Or Depreciation Rates, Property, Plant And Equipment, Period

cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod

40 years

Useful Lives Or Depreciation Rates, Property, Plant And Equipment, Period

cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod

40 years

Useful Lives Or Depreciation Rates, Property, Plant And Equipment, Period

cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod

3 years

Useful Lives Or Depreciation Rates, Property, Plant And Equipment, Period

cls_UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod

15 years

Services Agreement, Renewal Term, Related Party Transactions

cls_ServicesAgreementRenewalTermRelatedPartyTransactions

1 year

Services Agreement, Annual Fee, Related Party Transactions

cls_ServicesAgreementAnnualFeeRelatedPartyTransactions

$ 235,000

Services Agreement, Automatic Termination Period, Related Party Transactions

cls_ServicesAgreementAutomaticTerminationPeriodRelatedPartyTransactions

30 days

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

$ 100,000

^[2]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

15,000,000.0

^[2]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

15,100,000

^[2]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

70,000,000.0

^[3]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

(41,600,000)

^[3]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

28,400,000

^[3]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

50,300,000

^[4]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

1,800,000

^[4]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

(25,000,000.0)

^[4]

Stock Repurchased and Retired During Period, Value1

cls_StockRepurchasedandRetiredDuringPeriodValue1

27,100,000

^[4]

Key Management Personnel Compensation, Post-employment And Other Long-term Employee Benefits

cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits

200,000

Key Management Personnel Compensation, Post-employment And Other Long-term Employee Benefits

cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits

600,000

Key Management Personnel Compensation, Post-employment And Other Long-term Employee Benefits

cls_KeyManagementPersonnelCompensationPostemploymentAndOtherLongtermEmployeeBenefits

$ 500,000

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

2.10%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

1.40%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

1.80%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

2.90%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

2.50%

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate1

cls_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate1

3.20%

Increase (Decrease) Through Accretion and Net Exchange Differences, Other Provisions

cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions

$ 200,000

Increase (Decrease) Through Accretion and Net Exchange Differences, Other Provisions

cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions

(300,000)

Increase (Decrease) Through Accretion and Net Exchange Differences, Other Provisions

cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions

Increase (Decrease) Through Accretion and Net Exchange Differences, Other Provisions

cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions

(400,000)

Increase (Decrease) Through Accretion and Net Exchange Differences, Other Provisions

cls_IncreaseDecreaseThroughAccretionandNetExchangeDifferencesOtherProvisions

$ (500,000)

Pre-Tax Discount Rate Applied To Cash Flow Projections

cls_PreTaxDiscountRateAppliedToCashFlowProjections

18.00%

Pre-Tax Discount Rate Applied To Cash Flow Projections

cls_PreTaxDiscountRateAppliedToCashFlowProjections

15.00%

Pre-Tax Discount Rate Applied To Cash Flow Projections

cls_PreTaxDiscountRateAppliedToCashFlowProjections

18.00%

Plan Assets At Fair Value, Allocation Percentage

cls_PlanAssetsAtFairValueAllocationPercentage

100.00%

Plan Assets At Fair Value, Allocation Percentage

cls_PlanAssetsAtFairValueAllocationPercentage

100.00%

Accounts Payable And Current Accrued Liabilities Recognised As Of Acquisition Date

cls_AccountsPayableAndCurrentAccruedLiabilitiesRecognisedAsOfAcquisitionDate

$ 121,300,000

Borrowings, Number Of Prepayments

cls_BorrowingsNumberOfPrepayments

Disclosure Of Detailed Information About Non-current Assets Explanatory [Table Text Block]

cls_DisclosureOfDetailedInformationAboutNoncurrentAssetsExplanatoryTableTextBlock


		December 31
	Note	2021		2022
Net pension assets	18	$	5.1	$	7.1
Land rights		8.9		7.3
Deferred investment costs		2.4		1.7
Deferred financing costs		2.3		1.5
Interest rate swap derivative	20	0.5		18.7
Other		6.0		17.2
		$	25.2	$	53.5

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Unhedged Items, Impact On Interest Expense

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableUnhedgedItemsImpactOnInterestExpense

$ 3,000,000.0

Additions To Right-of-Use Assets Through Business Combination

cls_AdditionsToRightOfUseAssetsThroughBusinessCombination

4,300,000

Additions To Right-of-Use Assets Through Business Combination

cls_AdditionsToRightOfUseAssetsThroughBusinessCombination

800,000

Additions To Right-of-Use Assets Through Business Combination

cls_AdditionsToRightOfUseAssetsThroughBusinessCombination

Additions To Right-of-Use Assets Through Business Combination

cls_AdditionsToRightOfUseAssetsThroughBusinessCombination

5,100,000

Reversal Of Expense From Share Based Payment Transactions With Employees

cls_ReversalOfExpenseFromShareBasedPaymentTransactionsWithEmployees

8,400,000

Non-Current Land Rights

cls_NonCurrentLandRights

8,900,000

Non-Current Land Rights

cls_NonCurrentLandRights

7,300,000

Other Current Liabilities Recognised As Of Acquisition Date

cls_OtherCurrentLiabilitiesRecognisedAsOfAcquisitionDate

$ 8,100,000

Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount1

cls_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1

400,000

Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount1

cls_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1

300,000

Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount1

cls_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1

300,000

Letters Of Credit, Maximum Sub-Limit, Amount

cls_LettersOfCreditMaximumSubLimitAmount

$ 150,000,000.0

Borrowing Facilities, Accordion Feature, Higher Borrowing Capacity Option

cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption

150,000,000.0

Other Charges (Recoveries), By Function

cls_OtherChargesRecoveriesByFunction

23,500,000

Other Charges (Recoveries), By Function

cls_OtherChargesRecoveriesByFunction

10,300,000

Other Charges (Recoveries), By Function

cls_OtherChargesRecoveriesByFunction

6,700,000

Deferred Finance Costs

cls_DeferredFinanceCosts

2,300,000

Deferred Finance Costs

cls_DeferredFinanceCosts

$ 1,500,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable For Unrealized Gain, Percent

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableForUnrealizedGainPercent

0.25%

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable For Unrealized Loss, Percent

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableForUnrealizedLossPercent

0.25%

Deferred Tax Liabilities And Other Non-current Liabilities Recognized As Of Acquisition Date

cls_DeferredTaxLiabilitiesAndOtherNoncurrentLiabilitiesRecognizedAsOfAcquisitionDate

$ 38,000,000.0

Percentage of Debt Hedged

cls_PercentageOfDebtHedged

53.00%

Percentage of Debt Hedged

cls_PercentageOfDebtHedged

30.00%

Share-based Compensation Arrangement By Share-based Payment Award, Percentage Of Annual Fees Paid To Board Of Directors Paid In Form Of Awards

cls_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentageOfAnnualFeesPaidToBoardOfDirectorsPaidInFormOfAwards

100.00%

Other Assets, Miscellaneous, Noncurrent1

cls_OtherAssetsMiscellaneousNoncurrent1

$ 6,000,000.0

Other Assets, Miscellaneous, Noncurrent1

cls_OtherAssetsMiscellaneousNoncurrent1

$ 17,200,000

Schedule Of Credit Facility Activity [Table Text Block]

cls_ScheduleOfCreditFacilityActivityTableTextBlock

Activity under our Credit Facility for the periods indicated is set forth below:


	Revolver (i)		Term loans
Outstanding balances as of December 31, 2019	$	—	$	592.3

Amount repaid in Q1 2020	—		$	(60.9)

Amount repaid in Q2 2020	—		$	(61.0)




Outstanding balances as of December 31, 2020	$	—	$	470.4


Amount repaid in Q1 2021	—		(30.0)




Amount borrowed in Q4 2021	220.0		365.0
Amount repaid in Q4 2021	(220.0)		(145.0)
Outstanding balances as of December 31, 2021	$	—	$	660.4


Amount repaid in Q1 2022	—		(4.5625)

Amount repaid in Q2 2022	—		(4.5625)

Amount repaid in Q3 2022	—		(4.5625)

Amount repaid in Q4 2022	—		(19.5625)
Outstanding balances as of December 31, 2022	$	—	$	627.2

(i) In addition to borrowings for the acquisition of PCI, we drew on the Revolver for short term borrowings during certain quarters of 2020, 2021 and 2022, and repaid such borrowings in full within the quarter borrowed. Such intra-quarter borrowings and repayments, other than those related to the acquisition of PCI, are offset against each other, and are excluded from this table.

Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardExpirationPeriod1

10 years

Description of Accounting Policy for Other Financial Liabilities [Policy Text Block]

cls_DescriptionofAccountingPolicyforOtherFinancialLiabilitiesPolicyTextBlock

Financial liabilities that are not classified as FVTPL consist of our accounts payable (A/P), the majority of our accrued liabilities and certain other provisions, as well as borrowings under our credit facility, including our term loans. We initially recognize the carrying amount of such liabilities on our consolidated balance sheet at fair value plus transaction costs that are directly attributable to the issuance of such liabilities. These financial liabilities are measured at amortized cost subsequent to initial recognition. Borrowings within a particular quarter for short term working capital needs under our revolving credit facility that we repay in full within such quarter are netted against each other in our consolidated statements of cash flows.

Borrowings, Required Periodic Payment

cls_BorrowingsRequiredPeriodicPayment

$ 4,562,500

Share-based Compensation Award, Tranche Two1 [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

25.00%

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

33.33%

Share-based Compensation Award, Tranche Three1 [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

25.00%

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

33.33%

Share-based Compensation Award, Tranche One1 [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

25.00%

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

33.33%

Share-based Compensation Award, Tranche Four [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1

25.00%

Fire Event [Member]

Insurance Recovery, Inventory Losses

cls_InsuranceRecoveryInventoryLosses

$ 31,000,000

Insurance Recoveries Receivable

cls_InsuranceRecoveriesReceivable

$ 64,000,000

Mr. William A. Etherington [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period2

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardRequisiteServicePeriod2

90 days

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number Of Shares Owned By Individual

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual

475,000

Director [Member]

cls_WeightedAverageFairValueAtTheGrantDate

$ 5.64

cls_WeightedAverageFairValueAtTheGrantDate

8.98

cls_WeightedAverageFairValueAtTheGrantDate

10.18

cls_WeightedAverageFairValueAtTheGrantDate

5.71

cls_WeightedAverageFairValueAtTheGrantDate

8.92

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number Of Shares Owned By Individual

cls_WeightedAverageFairValueAtTheGrantDate

$ 10.44

Mr. Eamon Ryan [Member]

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual

30,000.00

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number Of Shares Owned By Individual

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesOwnedByIndividual

260,000

Minimum [Member]

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Unrealized Loss

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss

$ 2,100,000

Maximum [Member]

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Unrealized Loss

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnUnrealizedLoss

2,100,000

Two Thousand Twenty NCIB [Member]

Accrual For Repurchase Of Stock Under Automatic Share Purchase Plan

cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan

$ 15,000,000.0

Stock Repurchase Program, Number of Shares Authorized To Be Repurchased1

cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1

9,000,000

Two Thousand Twenty One NCIB [Member]

Stock Repurchase Program, Number of Shares Authorized To Be Repurchased1

cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1

9,000,000

SBC ASPP [Member]

cls_TreasuryStockSharesAcquired1

3,900,000

cls_TreasuryStockSharesAcquired1

700,000

Two Thousand Twenty Two NCIB ASPP [Member]

cls_TreasuryStockSharesAcquired1

Accrual For Repurchase Of Stock Under Automatic Share Purchase Plan

cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan

$ 0

Two Thousand Twenty Two NCIB [Member]

Stock Repurchase Program, Number Of Shares Remaining

cls_StockRepurchaseProgramNumberOfSharesRemaining

8,500,000

Stock Repurchase Program, Number of Shares Authorized To Be Repurchased1

cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1

8,800,000

TRS Agreement [Member]

Stock Repurchase Program, Number Of Shares Purchased

cls_StockRepurchaseProgramNumberOfSharesPurchased

400,205

Stock Repurchase Program, Weighted Average Price Per Share

cls_StockRepurchaseProgramWeightedAveragePricePerShare

$ 10.97

Share Repurchase Program, Term Of Automatic Annual Extension

cls_ShareRepurchaseProgramTermOfAutomaticAnnualExtension

1 year

NICB ASPP [Member]

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

2,500,000

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

2,800,000

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

Automatic Share Purchase Plan (ASPP) [Member]

Stock Repurchased And Retired During Period, Shares1

cls_StockRepurchasedAndRetiredDuringPeriodShares1

2,000,000.0

Two Thousand Twenty One SBC ASPP [Member]

Accrual For Repurchase Of Stock Under Automatic Share Purchase Plan

cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan

$ 33,800,000

Stock Repurchase Program, Number Of Shares Remaining

cls_StockRepurchaseProgramNumberOfSharesRemaining

3,000,000

Stock Repurchase Program, Number Of Shares Remaining

cls_StockRepurchaseProgramNumberOfSharesRemaining

3,000,000.0

Two Thousand Twenty One NICB ASPP [Member]

Accrual For Repurchase Of Stock Under Automatic Share Purchase Plan

cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan

$ 7,500,000

Associate Share Purchase Plan (ASPP) [Member]

Stock Repurchase Program, Number of Shares Authorized To Be Repurchased1

cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1

700,000

Total Return Swap Agreement [Member]

Notional Amount Of Shares Covered Under Total Return Swap Agreement

cls_NotionalAmountOfSharesCoveredUnderTotalReturnSwapAgreement

3,000,000

Celestica Share Unit Plan (CSUP) [Member]

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Numerator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Denominator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateDenominator

LTIP [Member]

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Numerator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateNumerator

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Rate, Denominator

cls_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionRateDenominator

Capital Shares Reserved for Future Issuance

cls_CapitalSharesReservedforFutureIssuance

9,900,000

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized1

cls_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorized1

29,000,000

Asia [Member]

Number Of Subsidiaries

cls_NumberOfSubsidiaries

China And Thailand [Member]

Deferred Tax Expense (Income) Relating To Temporary Differences, Undistributed Foreign Earnings

cls_DeferredTaxExpenseIncomeRelatingToTemporaryDifferencesUndistributedForeignEarnings

$ 16,500,000

Deferred Tax Expense, Related To Temporary Differences, Repatriation Of Undistributed Foreign Earnings, Portion Paid In Current Year

cls_DeferredTaxExpenseRelatedToTemporaryDifferencesRepatriationOfUndistributedForeignEarningsPortionPaidInCurrentYear

7,800,000

Deferred Tax Expense, Related To Temporary Differences, Repatriation Of Undistributed Foreign Earnings, Portion Paid In Current Year

cls_DeferredTaxExpenseRelatedToTemporaryDifferencesRepatriationOfUndistributedForeignEarningsPortionPaidInCurrentYear

$ 7,200,000

LAOS

Income Tax Holiday, Percentage

cls_IncomeTaxHolidayPercentage

100.00%

CHINA

Deferred Tax Expense (Income) Relating To Temporary Differences, Undistributed Foreign Earnings

cls_DeferredTaxExpenseIncomeRelatingToTemporaryDifferencesUndistributedForeignEarnings

$ 3,300,000

Deferred Tax Expense (Income) Relating To Temporary Differences, Undistributed Foreign Earnings

cls_DeferredTaxExpenseIncomeRelatingToTemporaryDifferencesUndistributedForeignEarnings

6,000,000.0

Tax Expense (Income) Relating To Current And Future Withholding Taxes On Undistributed Foreign Earnings

cls_TaxExpenseIncomeRelatingToCurrentAndFutureWithholdingTaxesOnUndistributedForeignEarnings

10,300,000

Deferred Tax Expense, Related To Temporary Differences, Repatriation Of Undistributed Foreign Earnings, Portion Paid In Current Year

cls_DeferredTaxExpenseRelatedToTemporaryDifferencesRepatriationOfUndistributedForeignEarningsPortionPaidInCurrentYear

$ 2,500,000

THAILAND

Income Tax Holiday, Percentage

cls_IncomeTaxHolidayPercentage

50.00%

Income Tax Holiday, Initial Percentage

cls_IncomeTaxHolidayInitialPercentage

100.00%

Income Tax Incentive, Number Of Incentives

cls_IncomeTaxIncentiveNumberOfIncentives

Income Tax Incentive, Exemption Percentage, Incentive One

cls_IncomeTaxIncentiveExemptionPercentageIncentiveOne

50.00%

Income Tax Incentive, Exemption Percentage, Incentive Two

cls_IncomeTaxIncentiveExemptionPercentageIncentiveTwo

100.00%

Income Tax Incentive, Exemption Term, Incentive Two

cls_IncomeTaxIncentiveExemptionTermIncentiveTwo

8 years

Income Tax Incentive, Exemption Percentage, Incentive Three

cls_IncomeTaxIncentiveExemptionPercentageIncentiveThree

100.00%

MALAYSIA

Income Tax Holiday, Percentage

cls_IncomeTaxHolidayPercentage

50.00%

Income Tax Holiday, Initial Term

cls_IncomeTaxHolidayInitialTerm

5 years

Sale Of Receivables Under Prior Facility Program [Member]

Transfer Of Financial Assets Accounted For As Sales, Maximum Limit

cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit

$ 405,000,000.0

Sale Of Receivables Under Facility Program [Member]

Transfer Of Financial Assets Accounted For As Sales, Maximum Limit

cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit

405,000,000.0

Transfer Of Financial Assets Accounted For As Sales, Maximum Limit

cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit

$ 300,000,000.0

Transfer Of Financial Assets Accounted For As Sales, Term Of Agreement Extensions

cls_TransferOfFinancialAssetsAccountedForAsSalesTermOfAgreementExtensions

1 year

Transfer Of Financial Assets Accounted For As Sales, Term Required Notice Before Termination

cls_TransferOfFinancialAssetsAccountedForAsSalesTermRequiredNoticeBeforeTermination

3 months

Transfer Of Financial Assets Accounted For As Sales, Amount Derecognized1

cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1

$ 245,600,000

Transfer Of Financial Assets Accounted For As Sales, Amount Derecognized1

cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1

45,800,000

Sale Of Receivables Under Supplier Financing Program [Member]

Transfer Of Financial Assets Accounted For As Sales, Amount Derecognized1

cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1

105,600,000

Transfer Of Financial Assets Accounted For As Sales, Amount Derecognized1

cls_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized1

$ 98,000,000.0

CCS Segment Customer [Member]

Number Of Supplier Financing Programs

cls_NumberOfSupplierFinancingPrograms

ATS Segment Customer [Member]

Number Of Supplier Financing Programs

cls_NumberOfSupplierFinancingPrograms

Mexico, Pesos

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ 400,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

(100,000)

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 100,000

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (400,000)

Thailand, Baht

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

1,200,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

(400,000)

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 400,000

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (1,100,000)

Canada, Dollars

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

1,100,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

(500,000)

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 500,000

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (1,100,000)

Romania, New Lei

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

United Kingdom, Pounds

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

Singapore, Dollars

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Malaysia, Ringgits

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ 1,200,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

(200,000)

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 200,000

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (1,200,000)

Japan, Yen

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

Euro Member Countries, Euro

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (200,000)

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 0

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

8 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ 200,000

China, Yuan Renminbi

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Other Comprehensive Income

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnOtherComprehensiveIncome

200,000

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnNetEarnings

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Net Earnings

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnNetEarnings

$ 0

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Impact On Other Comprehensive Income

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

12 months

cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnOtherComprehensiveIncome

$ (200,000)

Korea (South), Won

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

Line Of Credit Facility, Maximum Borrowing Capacity1

cls_MaximumLengthOfTimeHedgedInCashFlowHedge

4 months

Bridge Loan1 [Member]

cls_LineOfCreditFacilityMaximumBorrowingCapacity1

$ 50,000,000.0

Borrowings Maturity, Term

cls_BorrowingsMaturityTerm

10 days

Accounts Receivable [Member] | Customer Concentration Risk1 [Member]

cls_NumberOfCustomers

Sales Revenue, Net1 [Member] | Customer Concentration Risk1 [Member]

cls_NumberOfCustomers

cls_NumberOfCustomers

cls_NumberOfCustomers