CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Earnings	$ 2,001	$ 607	$ 3,867	$ 2,664
Other comprehensive income/(loss), net of tax
Change in unrealized gain on cash flow hedges	166	352	121	646
Change in unrealized gain/(loss) on net investment hedges	385	(386)	400	(253)
Excluded components of fair value hedges	2	(4)	9	(5)
Reclassification to earnings of loss on cash flow hedges	12	52	19	109
Reclassification to earnings of pension and other postretirement benefits (OPEB) amounts	(4)	(3)	(8)	(5)
Foreign currency translation adjustments	(1,458)	1,881	(1,517)	1,173
Other comprehensive income/(loss), net of tax	(897)	1,892	(976)	1,665
Comprehensive income	1,104	2,499	2,891	4,329
Comprehensive income attributable to noncontrolling interests	(34)	(58)	(98)	(71)
Comprehensive income attributable to controlling interests	1,070	2,441	2,793	4,258
Preference share dividends	(87)	(145)	(171)	(247)
Comprehensive income attributable to common shareholders	$ 983	$ 2,296	$ 2,622	$ 4,011