CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Earnings	$ 5,631	$ 6,058	$ 2,938
Other comprehensive income/(loss), net of tax
Change in unrealized gain on cash flow hedges	73	220	847
Change in unrealized gain/(loss) on net investment hedges	(1,305)	409	(971)
Other comprehensive income/(loss) from equity investees	(10)	6	(6)
Excluded components of fair value hedges	9	12	(35)
Reclassification to earnings of loss on cash flow hedges	23	14	143
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(16)	(18)	(10)
Reclassification to earnings of loss on equity investees	0	0	16
Actuarial gain/(loss) on pension and OPEB	248	(130)	312
Foreign currency translation adjustments	5,895	(1,728)	4,406
Other comprehensive income/(loss), net of tax	4,917	(1,215)	4,702
Comprehensive income	10,548	4,843	7,640
Comprehensive (income)/loss attributable to noncontrolling interests	(295)	131	(21)
Comprehensive income attributable to controlling interests	10,253	4,974	7,619
Preference share dividends	(388)	(352)	(414)
Comprehensive income attributable to common shareholders	$ 9,865	$ 4,622	$ 7,205