XML 105 R79.htm IDEA: XBRL DOCUMENT
v3.20.4

Capital Stock - Schedule of Repurchase Activities under NCIB and SVS Held for Delivery under SBC Plans (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended | 13 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 | Nov. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Aggregate cost of SVS repurchased for cancellation |  |  | $ 0.1 | $ 67.3 | $ 75.5 |
Aggregate cost of SVS repurchased for delivery under SBC plans |  |  | 19.1 | $ 9.2 | $ 22.4 |
Accrual for repurchase of stock under automatic share purchase plan | $ 15.0 |  | $ 15.0 |  |  |
SVS |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of SVS repurchased for cancellation (in millions) (in shares) |  |  | 6,200.0000 | 8,300,000 | 6,800,000 |
Aggregate cost of SVS repurchased for delivery under SBC plans |  |  | $ 19.1 | $ 9.2 | $ 22.4 |
Number of SVS repurchased for delivery under SBC plans (in millions) (in shares) |  |  | 2,900,000 | 1,200,000 | 2,100,000 |
Number of SVS held by trustee for delivery under SBC plans (in shares) | 2,400,000 |  | 2,400,000 | 1,700,000 | 1,900,000 | 1,700,000
Value of SVS held by trustee for delivery under SBC plans | $ 15.7 |  | $ 15.7 | $ 14.8 | $ 20.2 | $ 14.8
SVS | 2017 NCIB |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Aggregate cost of SVS repurchased for cancellation |  |  |  |  | $ 75.5 |
Number of SVS repurchased for cancellation (in millions) (in shares) |  |  |  |  | 6,800,000 |
Number of shares authorized to be repurchased (in shares) |  | 10,500,000 |  |  |  |
Share price |  |  |  |  | $ 11.10 |
SVS | 2018 NCIB |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Aggregate cost of SVS repurchased for cancellation |  |  |  | $ 67.3 |  |
Number of SVS repurchased for cancellation (in millions) (in shares) |  |  |  | 8,300,000 |  |
Number of shares authorized to be repurchased (in shares) |  |  |  |  |  | 9,500,000
Share price |  |  |  | $ 8.15 |  |
SVS | 2020 NCIB |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Aggregate cost of SVS repurchased for cancellation | $ 0.1 |  |  |  |  |
Number of SVS repurchased for cancellation (in millions) (in shares) | 6,200 |  |  |  |  |
Share price | $ 7.45 |  |  |  |  |

X
- Definition Accrual For Repurchase Of Stock Under Automatic Share Purchase Plan + References No definition available. + Details
Name: | cls_AccrualForRepurchaseOfStockUnderAutomaticSharePurchasePlan
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payments To Acquire Or Redeem Entity's Shares For Cancellation + References No definition available. + Details
Name: | cls_PaymentsToAcquireOrRedeemEntitysSharesForCancellation
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Share Price + References No definition available. + Details
Name: | cls_SharePrice
Namespace Prefix: | cls_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Repurchase Program, Number of Shares Authorized to be Repurchased1 + References No definition available. + Details
Name: | cls_StockRepurchaseProgramNumberofSharesAuthorizedToBeRepurchased1
Namespace Prefix: | cls_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Repurchased and Retired During Period, Shares + References No definition available. + Details
Name: | cls_StockRepurchasedAndRetiredDuringPeriodShares1
Namespace Prefix: | cls_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Treasury Stock, Shares, Acquired1 + References No definition available. + Details
Name: | cls_TreasuryStockSharesAcquired1
Namespace Prefix: | cls_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Treasury Stock, Shares, Acquired, Held by Trustee + References No definition available. + Details
Name: | cls_TreasuryStockSharesAcquiredHeldByTrustee
Namespace Prefix: | cls_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Treasury Stock, Value, Acquired, Cost Method, Held By Trustee + References No definition available. + Details
Name: | cls_TreasuryStockValueAcquiredCostMethodHeldByTrustee
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_PurchaseOfTreasuryShares
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=cls_SubordinateVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cls_ShareRepurchaseProgram1Axis=cls_TwoThousandSeventeenNCIBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cls_ShareRepurchaseProgram1Axis=cls_TwoThousandEighteenNCIBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cls_ShareRepurchaseProgram1Axis=cls_TwoThousandTwentyNCIBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |