INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 774	$ 800
Net gain (loss) in foreign currency translation adjustments, net of hedging activities	699	(27)
Change in derivatives designated as cash flow hedges	1	2
Change in pension and post-retirement defined benefit plans	12	8
Other comprehensive income from equity investees	0	3
Other comprehensive income (loss) before income taxes	712	(14)
Income tax recovery (expense)	6	(3)
Net other comprehensive income	718	(17)
Comprehensive income	1,492	783
Comprehensive income attributable to non-controlling interest	22	0
Comprehensive income attributable to controlling shareholders	$ 1,470	$ 783