CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Earnings	$ 1,383	$ 814	$ 4,047	$ 4,349
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	171	(16)	817	197
Change in unrealized gain/(loss) on net investment hedges	(934)	(206)	(1,187)	16
Other comprehensive loss from equity investees	(7)	(30)	(7)	(28)
Excluded components of fair value hedges	(33)	(1)	(38)	(3)
Reclassification to earnings of loss on cash flow hedges	36	55	145	168
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(2)	5	(7)	16
Reclassification to earnings of loss on equity investees	16	0	16	0
Foreign currency translation adjustments	4,135	1,281	5,308	(350)
Other comprehensive income, net of tax	3,382	1,088	5,047	16
Comprehensive income	4,765	1,902	9,094	4,365
Comprehensive income attributable to noncontrolling interests	(116)	(62)	(187)	(68)
Comprehensive income attributable to controlling interests	4,649	1,840	8,907	4,297
Preference share dividends	(83)	(98)	(330)	(280)
Comprehensive income attributable to common shareholders	$ 4,566	$ 1,742	$ 8,577	$ 4,017