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Leases - Liability Continuity (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Presentation of leases for lessee [abstract] |  |
Beginning balance | $ 571 | $ 694
Cash flows |  |
Principal payments | (160) | (149)
Interest payments | (31) | (38)
Non-cash changes |  |
Additions | 674 | 210
Interest expense | 31 | 38
Changes in foreign exchange and other | (24) | 25
Transfer to liabilities associated with assets held for sale | 0 | (209)
Ending balance | 1,061 | 571
Less current portion of lease liabilities | (195) | (132)
Non-current lease liabilities | $ 866 | $ 439

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- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of non-current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
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- Definition Additions, Lease Liability + References No definition available. + Details
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- Definition Cash Flows From Used In Increase Decrease In Lease Liability Continuity [Abstract] + References No definition available. + Details
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- Definition Change In Foreign Exchange And Other, Lease Liability + References No definition available. + Details
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- Definition Lease Liability, Accretion + References No definition available. + Details
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- Definition Non Cash Transactions [abstract] + References No definition available. + Details
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- Definition Payments Of Lease Liabilities, Interest Payments + References No definition available. + Details
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- Definition Payments Of Lease Liabilities, Principal Payments + References No definition available. + Details
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- Definition Transfer To Liabilities Associated With Assets Held For Sale + References No definition available. + Details
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