CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Earnings	$ 2,057	$ 2,014
Other comprehensive income/(loss), net of tax
Change in unrealized gain on cash flow hedges	294	370
Change in unrealized gain on net investment hedges	133	93
Other comprehensive loss from equity investees	0	(22)
Excluded components of fair value hedges	(1)	(1)
Reclassification to earnings of loss on cash flow hedges	57	52
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(2)	5
Foreign currency translation adjustments	(708)	(796)
Other comprehensive loss, net of tax	(227)	(299)
Comprehensive income	1,830	1,715
Comprehensive (income)/loss attributable to noncontrolling interests	(13)	3
Comprehensive income attributable to controlling interests	1,817	1,718
Preference share dividends	(102)	(92)
Comprehensive income attributable to common shareholders	$ 1,715	$ 1,626