INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 917	$ 837	$ 3,060	$ 2,514
Net gain (loss) in foreign currency translation adjustments, net of hedging activities	654	(423)	(1,104)	577
Change in derivatives designated as cash flow hedges	0	1	1	5
Change in pension and post-retirement defined benefit plans	3	12	8	35
Other comprehensive income (loss) from equity investees	3	(5)	6	(7)
Other comprehensive income (loss) before income taxes	660	(415)	(1,089)	610
Income tax recovery (expense)	12	(7)	(23)	(1)
Net other comprehensive income (loss)	672	(422)	(1,112)	609
Comprehensive income	1,589	415	1,948	3,123
Comprehensive income (loss) attributable to non-controlling interest	18	(15)	(38)	16
Comprehensive income attributable to controlling shareholders	$ 1,571	$ 430	$ 1,986	$ 3,107