XML 101 R72.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Credit Facilities and Lease Obligations - Additional Information (Details) - USD ($) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 29, 2021 | Dec. 06, 2021 | Oct. 27, 2021 | Apr. 27, 2020 | Mar. 07, 2019 | Jun. 30, 2020 | Dec. 31, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 05, 2021 | Dec. 31, 2018 | Nov. 30, 2018 | Jun. 30, 2018
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 0 |  |  |  |  |
Repayments of borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Proceeds from Toronto sale |  |  |  |  | $ 113,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of current borrowings |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 | $ 1,500,000 | $ 1,500,000 | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
Number of prepayments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
New credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | 660,400,000 |  |  |  |  |  |  |  |  |  |  | $ 660,400,000 |  |  |  |  |  |
New credit facility | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings, percentage of excess cash flow (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
New credit facility | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings, percentage of excess cash flow (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Term Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | 660,400,000 |  |  |  | 592,300,000 |  |  |  | 470,400,000 |  |  | $ 660,400,000 | 470,400,000 | $ 592,300,000 |  | $ 598,300,000 |  |
Repayments of borrowings |  |  |  |  |  |  | 145,000,000.0 | $ 30,000,000.0 | $ 61,000,000.0 | $ 60,900,000 |  |  |  |  |  |  |  | 175,000,000.0 | 121,900,000 | 213,000,000.0 |  |  |  |
Proceeds from borrowings |  |  |  |  |  |  | 365,000,000.0 |  |  |  |  |  |  |  |  |  |  | 365,000,000.0 | 0 | 48,000,000.0 |  |  |  |
Initial Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | $ 295,400,000 |  |  |  |  |  |  |  | 295,400,000 |  |  | 295,400,000 | 295,400,000 |  |  |  |  | $ 350,000,000.0
Repayments of borrowings |  |  |  | $ 47,000,000.0 |  | $ 1,500,000 |  |  |  | 875,000 |  |  |  |  |  |  |  | $ 875,000 |  |  |  |  |  |
Initial Term Loan | London Interbank Offered Rate LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  |  |  |  |  |  | 2.125% |  |  |  |  |  |  |  |  |  |  | 2.125% |  |  | 2.125% |  |  |
Incremental Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  | 175,000,000.0 |  |  | $ 0 | 175,000,000.0 |  |  |  | $ 250,000,000.0 |
Repayments of borrowings |  |  |  |  |  | $ 12,500,000 |  |  |  |  |  |  |  |  |  | $ 107,000,000.0 |  | 625,000 |  |  |  |  |  |
Amount of accordion feature |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000.0 |
Revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  | 0 | 0 | 0 |  | $ 159,000,000.0 |  |
Line of credit, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | 450,000,000.0 |  |  |  |  |  |  |  |  |  |  | $ 450,000,000.0
Repayments of borrowings | $ 5,000,000.0 | $ 215,000,000.0 |  |  |  |  | 220,000,000.0 | 0 | $ 0 | 0 | $ 0 | $ 53,000,000.0 | $ 44,000,000.0 | 110,000,000.0 |  |  |  |  |  | $ 207,000,000.0 |  |  |  |
Proceeds from borrowings |  |  | $ 220,000,000.0 |  |  |  | 220,000,000.0 |  |  |  |  |  |  | $ 48,000,000.0 |  |  |  |  |  |  |  |  |  |
Proceeds from Toronto sale |  |  |  |  | $ 110,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver | Credit facility prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Revolver | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fees (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.35% |  |  |
Revolver | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fees (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |
Revolver | London Interbank Offered Rate LIBOR | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.75% |  |  |
Revolver | London Interbank Offered Rate LIBOR | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |
First Incremental Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  | 145,000,000.0 |  |  |  |  |  | $ 30,000,000.0 |  | $ 60,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Incremental Term Loan | London Interbank Offered Rate LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |
Second Incremental Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  | 365,000,000.0 |  |  |  |  | $ 365,000,000.0 |  |  |  |  |  |  |  | $ 0 |  |  | 365,000,000.0 | $ 0 |  |  |  |  |
Quarterly repayment of borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,562,500 |  |  |  |  |  |
Proceeds from borrowings |  | 365,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Second Incremental Term Loan | London Interbank Offered Rate LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |
Revolving Facility Due March 28, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  | 600,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility accordion feature |  | $ 150,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit sub-limit |  |  |  |  |  |  | $ 150,000,000.0 |  |  |  |  |  |  |  |  |  |  | $ 150,000,000.0 |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fees (percent) |  | 0.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fees (percent) |  |  |  |  |  |  | 0.45% |  |  |  |  |  |  |  |  |  |  | 0.45% |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | London Interbank Offered Rate LIBOR | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | London Interbank Offered Rate LIBOR | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Base Rate | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Base Rate | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Margin for borrowings (percent) |  | 1.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Bridge Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  |  |  |  | $ 50,000,000.0 |  |  |  |  |  |  |  |  |  |  | $ 50,000,000.0 |  |  |  |  |  |
Revolving Facility Due March 28, 2025 | Bridge Loan | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 days |  |  |  |  |  |
Forecast | Incremental Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Forecast | Revolver | Credit facility prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |

X
- Definition Borrowing Facilities, Accordion Feature, Higher Borrowing Capacity Option + References No definition available. + Details
Name: | cls_BorrowingFacilitiesAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Borrowings Maturity, Term + References No definition available. + Details
Name: | cls_BorrowingsMaturityTerm
Namespace Prefix: | cls_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Borrowings, Number Of Prepayments + References No definition available. + Details
Name: | cls_BorrowingsNumberOfPrepayments
Namespace Prefix: | cls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Letters Of Credit, Maximum Sub-Limit, Amount + References No definition available. + Details
Name: | cls_LettersOfCreditMaximumSubLimitAmount
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option + References No definition available. + Details
Name: | cls_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line Of Credit Facility, Maximum Borrowing Capacity1 + References No definition available. + Details
Name: | cls_LineOfCreditFacilityMaximumBorrowingCapacity1
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line of Credit Facility, Commitment Fee Percentage1 + References No definition available. + Details
Name: | cls_LineofCreditFacilityCommitmentFeePercentage1
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Quarterly Repayments Of Borrowings, Classified As Financing Activities + References No definition available. + Details
Name: | cls_QuarterlyRepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Repayments Of Borrowings, Percentage Of Specified Excess Cash Flow + References No definition available. + Details
Name: | cls_RepaymentsOfBorrowingsPercentageOfSpecifiedExcessCashFlow
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The cash inflow from borrowings obtained. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 17 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_17_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the disposal of non-current assets or disposal groups classified as held for sale and discontinued operations. [Refer: Discontinued operations [member]; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_16&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 17 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_17_d&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for repayments of current borrowings. [Refer: Current borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_17&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_RepaymentsOfCurrentBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_TermLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_InitialTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=cls_LondonInterbankOfferedRateLIBOR1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_IncrementalTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_RevolvingFacilityDueJune2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=cls_CreditFacilityPrepaymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_FirstIncrementalTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_SecondIncrementalTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cls_RevolvingFacilityDueMarch282025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=cls_BaseRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cls_CreditFacility1Axis=cls_BridgeLoan1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |