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Derivative and Hedging Instruments - Reconciliation of Accumulated Other Comprehensive Income (Loss) Related to Net Investment Hedges (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Accumulated other comprehensive income (loss) [Roll Forward] |  |
Hedging gains (losses) recognized in AOCI during the year | $ (583) | $ 183
Foreign exchange translation risk | Net investment hedges |  |
Accumulated other comprehensive income (loss) [Roll Forward] |  |
Accumulated other comprehensive income (loss), beginning of year | 59 | (137)
Hedging gains (losses) recognized in AOCI during the year | (620) | 196
Reclassification from AOCI to income | 0 | 0
Accumulated other comprehensive income (loss), end of year | (561) | 59
Reclassification adjustment related to de-designated hedges as hedged item affects income | 0 | 0
Reclassification adjustment related to items for which the hedged future cash flows are no longer expected to occur | $ 0 | $ 0

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- Definition The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The gains (losses) recognised in other comprehensive income on hedges of net investments in foreign operations, net of tax, before reclassification adjustments. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 91 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_a&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2024-01-01 -Paragraph 6.5.13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_6.5.13_a&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24C -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_b_i&doctype=Standard -URIDate 2024-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24E -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2024-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 39 -IssueDate 2024-01-01 -Paragraph 102 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2024-en-r&anchor=para_102_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of reclassification adjustments related to cash flow hedges, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 92 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_92&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24E -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24C -Subparagraph b -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_b_iv&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Accumulated Other Comprehensive Income (Loss) + References No definition available. + Details
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- Definition Reclassification Adjustment Related To Items For Which Hedged Future Cash Flows Are No Longer Expected To Occur + References No definition available. + Details
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