CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Earnings	$ 2,001	$ 2,001	$ 3,566	$ 3,867
Other comprehensive income/(loss), net of tax
Change in unrealized gain on cash flow hedges	12	166	128	121
Change in unrealized gain/(loss) on net investment hedges	(161)	385	(538)	400
Other comprehensive income from equity investees	2	0	1	0
Excluded components of fair value hedges	0	2	4	9
Reclassification to earnings of loss on cash flow hedges	9	12	9	19
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(5)	(4)	(9)	(8)
Foreign currency translation adjustments	727	(1,458)	2,385	(1,517)
Other comprehensive income/(loss), net of tax	584	(897)	1,980	(976)
Comprehensive income	2,585	1,104	5,546	2,891
Comprehensive income attributable to noncontrolling interests	(72)	(34)	(160)	(98)
Comprehensive income attributable to controlling interests	2,513	1,070	5,386	2,793
Preference share dividends	(95)	(87)	(188)	(171)
Comprehensive income attributable to common shareholders	$ 2,418	$ 983	$ 5,198	$ 2,622