XML 133 R103.htm IDEA: XBRL DOCUMENT
v3.19.1

Financial Instruments and Risk Management - Credit and Liquidity Risk (Details) - USD ($) | Dec. 31, 2018 | Nov. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of continuing involvement in derecognised financial assets [line items] |  |  |
Percent of gross accounts receivable over 90 days past due | 1.00% |  |
Allowance for doubtful accounts | $ 5,300,000 |  | $ 4,300,000
Factoring of receivables from facility program |  |  |
Disclosure of continuing involvement in derecognised financial assets [line items] |  |  |
Agreement to sell trade receivables, maximum capacity | $ 250,000,000 | $ 200,000,000.0 |

X
- Definition Financing Receivable, Percent Past Due2 + References No definition available. + Details
Name: | cls_FinancingReceivablePercentPastDue2
Namespace Prefix: | cls_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Transfer Of Financial Assets Accounted For As Sales, Maximum Limit + References No definition available. + Details
Name: | cls_TransferOfFinancialAssetsAccountedForAsSalesMaximumLimit
Namespace Prefix: | cls_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_16&doctype=Standard&book=B -URIDate 2017-03-09 + Details
Name: | ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DisclosureOfContinuingInvolvementInDerecognisedFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cls_DerecognitionOfFinancialAssetsByTypeOfTransferAxis=cls_SaleOfReceivablesUnderFacilityProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |