CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Earnings	$ 1,447	$ 623	$ 5,013	$ 4,490
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	(107)	238	21	359
Change in unrealized gain/(loss) on net investment hedges	181	(358)	(357)	42
Other comprehensive income from equity investees	2	7	3	7
Excluded components of fair value hedges	3	2	7	11
Reclassification to earnings of loss on cash flow hedges	9	39	18	58
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(2)	(5)	(11)	(13)
Foreign currency translation adjustments	(858)	1,386	1,527	(131)
Other comprehensive income/(loss), net of tax	(772)	1,309	1,208	333
Comprehensive income	675	1,932	6,221	4,823
Comprehensive income attributable to noncontrolling interests	(46)	(45)	(206)	(143)
Comprehensive income attributable to controlling interests	629	1,887	6,015	4,680
Preference share dividends	(98)	(89)	(286)	(260)
Comprehensive income attributable to common shareholders	$ 531	$ 1,798	$ 5,729	$ 4,420