XML 151 R95.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Pension and Non-pension Post-employment Benefit Plans - Actuarial Gains and Losses, Net of Tax, Recognized in OCI (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of analysis of other comprehensive income by item [line items] |  |  |  |
Loss on pension annuity purchase (see note 16(c)) |  | $ 17,000,000 | $ 0 | $ 0
Actuarial losses recognized during the year |  | 1,200,000 | (17,100,000) | 7,000,000
Income tax (recovery) expense |  | 0 | 1,400,000 | 0
Income tax (recovery) expense |  | (700,000) | (700,000) | (2,100,000)
Pension and non-pension post-employment benefit plans |  |  |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |  |  |
Cumulative losses, beginning of year |  | (4,100,000) | 13,000,000 | 6,000,000
Actuarial losses recognized during the year | $ 17,000,000 |  |  |
Cumulative losses (gains), end of year |  | $ 14,100,000 | $ (4,100,000) | $ 13,000,000

X
- Definition Cumulative Gain (Loss) On Defined Benefit Plans + References No definition available. + Details
Name: | cls_CumulativeGainLossOnDefinedBenefitPlans
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Income Tax Relating To Remeasurements Of Defined Benefit Plans, Accumulated Other Comprehensive Income + References No definition available. + Details
Name: | cls_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansAccumulatedOtherComprehensiveIncome
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other Comprehensive Income, Net of Tax, Gain (Loss) on Settlement + References No definition available. + Details
Name: | cls_OtherComprehensiveIncomeNetofTaxGainLossonSettlement
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph ab -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_ab&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 90 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_90&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of other comprehensive income, net of tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_91_a&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_7&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |