XML 84 R57.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Basis of Preparation and Material Accounting Policies - Schedule of useful life of intangible assets (Details) | 12 Months Ended
--- | ---
Dec. 31, 2023
Intellectual property | Top of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 5 years
Intellectual property | Bottom of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 3 years
Other intangible assets | Top of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 15 years
Other intangible assets | Bottom of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 4 years
Computer software assets | Top of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 10 years
Computer software assets | Bottom of range |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life of intangible assets | 1 year

X
- Definition Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period + References No definition available. + Details
Name: | cls_UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod
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_DisclosureOfIntangibleAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=cls_IntellectualProperty1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_OtherIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_ComputerSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |