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Accumulated Other Comprehensive Income (Loss) (Details) - CAD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Disclosure of accumulated other comprehensive income loss [line items] |  |
Beginning balance | $ 2,313 | $ 1,208
Other Comprehensive Income (Loss), Before Tax | (433) | 372
Reclassification on Divestiture (Note 5) | (1,261) |
Income Tax (Expense) Recovery | 0 | (19)
Ending balance | 619 | 1,561
Pension and Other Post-Employment Benefits |  |
Disclosure of accumulated other comprehensive income loss [line items] |  |
Beginning balance | 69 | 55
Other Comprehensive Income (Loss), Before Tax | 13 | 14
Reclassification on Divestiture (Note 5) | 0 |
Income Tax (Expense) Recovery | (3) | (3)
Ending balance | 79 | 66
Private Equity Investments |  |
Disclosure of accumulated other comprehensive income loss [line items] |  |
Beginning balance | 156 | 85
Other Comprehensive Income (Loss), Before Tax | (26) | 139
Reclassification on Divestiture (Note 5) | 0 |
Income Tax (Expense) Recovery | 3 | (16)
Ending balance | 133 | 208
Foreign Currency Translation Adjustment |  |
Disclosure of accumulated other comprehensive income loss [line items] |  |
Beginning balance | 2,088 | 1,068
Other Comprehensive Income (Loss), Before Tax | (420) | 219
Reclassification on Divestiture (Note 5) | (1,261) |
Income Tax (Expense) Recovery | 0 | 0
Ending balance | $ 407 | $ 1,287

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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 amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 90 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_90&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph ab -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_ab&doctype=Standard -URIDate 2024-03-27 + Details
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