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Accumulated Other Comprehensive Income (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Beginning balance | $ 21,505 |
Ending balance | 23,808 | $ 21,505
Net investments in foreign operations |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Accumulated other comprehensive income (loss), before tax, opening balance | 1,059 | 1,495
Other comprehensive income (loss), before tax | 1,653 | (436)
Accumulated other comprehensive income (loss), before tax, ending balance | 2,712 | 1,059
Hedges of net investments in foreign operations |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Accumulated other comprehensive income (loss), before tax, opening balance | (452) | (530)
Other comprehensive income (loss), before tax | (262) | 78
Accumulated other comprehensive income (loss), before tax, ending balance | (714) | (452)
Net unrealized foreign currency translation gains (losses) |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Income tax recovery (expense), opening balance | 4 | 7
Beginning balance | 611 | 972
Other comprehensive income (loss) tax (expense) recovery | 14 | (3)
Other comprehensive income (loss) | 1,405 | (361)
Income tax recovery (expense), ending balance | 18 | 4
Ending balance | 2,016 | 611
Interest rate hedges |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Accumulated other comprehensive income (loss), before tax, opening balance | 62 | 49
Other comprehensive income (loss), before tax | 10 | 13
Accumulated other comprehensive income (loss), before tax, ending balance | 72 | 62
Unrealized employee future benefits (losses) gains (Note 24) |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Accumulated other comprehensive income (loss), before tax, opening balance | (9) | (6)
Other comprehensive income (loss), before tax | 2 | (3)
Accumulated other comprehensive income (loss), before tax, ending balance | (7) | (9)
Cash flow hedges and unrealized employee future benefits (losses) gains |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Income tax recovery (expense), opening balance | (11) | (7)
Beginning balance | 42 | 36
Other comprehensive income (loss) tax (expense) recovery | (3) | (4)
Other comprehensive income (loss) | 9 | 6
Income tax recovery (expense), ending balance | (14) | (11)
Ending balance | 51 | 42
Accumulated other comprehensive income |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |
Beginning balance | 653 | 1,008
Other comprehensive income (loss) | 1,414 | (355)
Ending balance | $ 2,067 | $ 653

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