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Related Party Transactions - Additional Information (Details) - Entities with significant influence $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Disclosure of transactions between related parties [line items]
Renewal term of Service Agreement	1 year
Annual fee to be paid for Service Agreement	$ 235
Term of agreement termination	30 days

X

- Definition

Services Agreement, Annual Fee, Related Party Transactions

+ References

No definition available.

+ Details

Name:	cls_ServicesAgreementAnnualFeeRelatedPartyTransactions
Namespace Prefix:	cls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Services Agreement, Automatic Termination Period, Related Party Transactions

+ References

No definition available.

+ Details

Name:	cls_ServicesAgreementAutomaticTerminationPeriodRelatedPartyTransactions
Namespace Prefix:	cls_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Services Agreement, Renewal Term, Related Party Transactions

+ References

No definition available.

+ Details

Name:	cls_ServicesAgreementRenewalTermRelatedPartyTransactions
Namespace Prefix:	cls_
Data Type:	xbrli:durationItemType
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_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_JointControlOrSignificantInfluenceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: