INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,325	$ 765	$ 2,125	$ 1,355
Net (loss) gain in foreign currency translation adjustments, net of hedging activities	(611)	719	(638)	383
Change in derivatives designated as cash flow hedges	1	2	3	3
Change in pension and post-retirement defined benefit plans	(3)	38	5	77
Equity accounted investments	4	73	7	135
Other comprehensive (loss) income before income taxes	(609)	832	(623)	598
Income tax (expense) recovery on above items	(17)	2	(20)	(34)
Net other comprehensive (loss) income	(626)	834	(643)	564
Comprehensive income	699	1,599	1,482	1,919
Comprehensive loss attributable to the non-controlling interest	(7)	0	(7)	0
Comprehensive income attributable to controlling shareholders	$ 706	$ 1,599	$ 1,489	$ 1,919