XML 170 R114.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Segment and Geographic Information - Allocation of Property, Plant and Equipment, Intangible Assets and Goodwill (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
China |  |
Disclosure of geographical areas [line items] |  |
Property, plant and equipment, intangible assets and goodwill among countries that exceeded 10% | 22.00% | 23.00%
Thailand |  |
Disclosure of geographical areas [line items] |  |
Property, plant and equipment, intangible assets and goodwill among countries that exceeded 10% | 17.00% | 17.00%
Malaysia |  |
Disclosure of geographical areas [line items] |  |
Property, plant and equipment, intangible assets and goodwill among countries that exceeded 10% | 14.00% | 17.00%
Romania |  |
Disclosure of geographical areas [line items] |  |
Property, plant and equipment, intangible assets and goodwill among countries that exceeded 10% | 14.00% |
United States |  |
Disclosure of geographical areas [line items] |  |
Property, plant and equipment, intangible assets and goodwill among countries that exceeded 10% | 12.00% | 13.00%

X
- Definition Percentage Of Entities Non-current Assets Other Than Financial Instruments, Deferred Tax Assets, Post-Employment Benefit Assets, And Rights Arising Under Insurance Contracts + References No definition available. + Details
Name: | cls_PercentageOfEntitiesNoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostEmploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
Namespace Prefix: | cls_
Data Type: | num: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 domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfGeographicalAreasLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_TH
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_MY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_RO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |