INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 780	$ 891	$ 2,905	$ 2,246
Net gain (loss) in foreign currency translation adjustments, net of hedging activities	605	1,565	(33)	1,948
Change in derivatives designated as cash flow hedges	2	2	5	5
Change in pension and post-retirement defined benefit plans	8	22	13	99
Equity accounted investments	0	47	7	182
Other comprehensive income (loss) before income taxes	615	1,636	(8)	2,234
Income tax recovery (expense) on above items	15	36	(5)	2
Net other comprehensive income	630	1,672	(13)	2,236
Comprehensive income	1,410	2,563	2,892	4,482
Comprehensive income attributable to the non-controlling interest	20	0	13	0
Comprehensive income attributable to controlling shareholders	$ 1,390	$ 2,563	$ 2,879	$ 4,482