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Related Party Transactions - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) real_estate_partnership
Disclosure of transactions between related parties [line items] |
Term of agreement termination | 30 days
Number of real estate partnerships to purchase property | real_estate_partnership | 4
Entities with significant influence |
Disclosure of transactions between related parties [line items] |
Renewal term of Service Agreement | 1 year
Annual fee to be paid for Service Agreement | $ | $ 235,000
Key management personnel of entity |
Disclosure of transactions between related parties [line items] |
Percentage of interests in the Property Purchaser held by a Privately-held company (percent) | 27.00%
Percentage of interest held (percent) | 25.00%
Non-voting interest in the Assignee (percentage) | 5.00%

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- Definition Number Of Real Estate Partnerships, Related Party Transactions + References No definition available. + Details
Name: | cls_NumberOfRealEstatePartnershipsRelatedPartyTransactions
Namespace Prefix: | cls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Option To Obtain Non-Voting Interest, Related Party Transaction + References No definition available. + Details
Name: | cls_OptionToObtainNonVotingInterestRelatedPartyTransaction
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage Of Interest Held By Related Party, Related Party Transactions + References No definition available. + Details
Name: | cls_PercentageOfInterestHeldByRelatedPartyRelatedPartyTransactions
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage Of Interests Held By Privately-Held Company, Related Party Transactions + References No definition available. + Details
Name: | cls_PercentageOfInterestsHeldByPrivatelyHeldCompanyRelatedPartyTransactions
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- 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

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- 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

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- 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

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- 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
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_KeyManagementPersonnelOfEntityOrParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |