CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Earnings	$ 1,565	$ 1,866
Other comprehensive income/(loss), net of tax
Change in unrealized gain/(loss) on cash flow hedges	116	(45)
Change in unrealized gain/(loss) on net investment hedges	(377)	15
Other comprehensive loss from equity investees	(1)	0
Excluded components of fair value hedges	4	7
Reclassification to earnings of loss on cash flow hedges	0	7
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(4)	(4)
Foreign currency translation adjustments	1,658	(59)
Other comprehensive income/(loss), net of tax	1,396	(79)
Comprehensive income	2,961	1,787
Comprehensive income attributable to noncontrolling interests	(88)	(64)
Comprehensive income attributable to controlling interests	2,873	1,723
Preference share dividends	(93)	(84)
Comprehensive income attributable to common shareholders	$ 2,780	$ 1,639