INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 909	$ 774
Net (loss) gain in foreign currency translation adjustments, net of hedging activities	(29)	699
Change in derivatives designated as cash flow hedges	1	1
Change in pension and post-retirement defined benefit plans	3	12
Other comprehensive (loss) income before income taxes	(25)	712
Income tax (expense) recovery	(3)	6
Net other comprehensive (loss) income	(28)	718
Comprehensive income	881	1,492
Comprehensive (loss) income attributable to non-controlling interest	(2)	22
Comprehensive income attributable to controlling shareholders	$ 883	$ 1,470