CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Earnings	$ 2,938	$ 6,314	$ 3,416
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	847	162	(457)
Change in unrealized gain/(loss) on net investment hedges	(971)	49	102
Other comprehensive loss from equity investees	(6)	(12)	(1)
Excluded components of fair value hedges	(35)	(5)	5
Reclassification to earnings of loss on cash flow hedges	143	235	198
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(10)	21	13
Reclassification to earnings of (gain)/loss on equity investees	16	(62)	0
Actuarial gain/(loss) on pension and OPEB	312	394	(167)
Foreign currency translation adjustments	4,406	(507)	(853)
Other comprehensive income/(loss), net of tax	4,702	275	(1,160)
Comprehensive income	7,640	6,589	2,256
Comprehensive income attributable to noncontrolling interests	(21)	(95)	(22)
Comprehensive income attributable to controlling interests	7,619	6,494	2,234
Preference share dividends	(414)	(373)	(380)
Comprehensive income attributable to common shareholders	$ 7,205	$ 6,121	$ 1,854