XML 122 R95.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Pension and Non-pension Post-employment Benefit Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of defined benefit plans [line items] |  |
Percentage of plan members that are active employees of the Company | 0.00% | 1.00%
Plan assets, at fair value | $ 213.5 | $ 214.1
Percentage of plan assets held with financial institutions with a rating of A- or above | 92.00% |
Number of basis points | 1.00% |
Pension Plan |  |
Disclosure of defined benefit plans [line items] |  |
Plan assets, at fair value | $ 211.2 | 211.8
Plan assets, decrease due to restrictions | (2.6) | (0.9)
Level 1 |  |
Disclosure of defined benefit plans [line items] |  |
Plan assets, at fair value | 30.9 | 32.1
Level 3 |  |
Disclosure of defined benefit plans [line items] |  |
Plan assets, at fair value | $ 182.6 | $ 182.0

X
- Definition Number of Participants Of Retirement Benefit Plan Receiving Benefits, Percentage + References No definition available. + Details
Name: | cls_NumberofParticipantsOfRetirementBenefitPlanReceivingBenefitsPercentage
Namespace Prefix: | cls_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Plan Assets Held With Financial Institutions With A Rating Of A- Or Above + References No definition available. + Details
Name: | cls_PercentageOfPlanAssetsHeldWithFinancialInstitutionsWithARatingOfAOrAbove
Namespace Prefix: | cls_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Plan Assets, Decrease Due To Restrictions + References No definition available. + Details
Name: | cls_PlanAssetsDecreaseDueToRestrictions
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Benefit Obligations + References No definition available. + Details
Name: | cls_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnBenefitObligations
Namespace Prefix: | cls_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_57_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_PlanAssetsAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ifrs-full_DefinedBenefitPlansThatShareRisksBetweenEntitiesUnderCommonControlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |