INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) shares in Millions, $ in Millions	Total	Parent	Share capital	Additional paid-in capital	Accumulated other comprehensive Income (loss)	Retained earnings	Non-controlling interest
Beginning balance (shares) at Dec. 31, 2022			930.5
Beginning balance at Dec. 31, 2022	$ 38,886	$ 38,886	$ 25,516	$ 78	$ 91	$ 13,201	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,125	2,124				2,124	1
Other comprehensive income (loss)	(643)	(635)			(635)		(8)
Dividends declared	(353)	(353)				(353)
Effect of stock-based compensation expense	19	19		19
Shares issued under stock option plan (shares)			0.9
Shares issued under stock option plan	38	38	$ 47	(9)
Non-controlling interest in connection with business acquisition	932						932
Ending balance (shares) at Jun. 30, 2023			931.4
Ending balance at Jun. 30, 2023	41,004	40,079	$ 25,563	88	(544)	14,972	925
Beginning balance (shares) at Mar. 31, 2023			930.9
Beginning balance at Mar. 31, 2023	39,520	39,520	$ 25,538	84	74	13,824	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,325	1,324				1,324	1
Other comprehensive income (loss)	(626)	(618)			(618)		(8)
Dividends declared	(176)	(176)				(176)
Effect of stock-based compensation expense	9	9		9
Shares issued under stock option plan (shares)			0.5
Shares issued under stock option plan	20	20	$ 25	(5)
Non-controlling interest in connection with business acquisition	932						932
Ending balance (shares) at Jun. 30, 2023			931.4
Ending balance at Jun. 30, 2023	41,004	40,079	$ 25,563	88	(544)	14,972	925
Beginning balance (shares) at Dec. 31, 2023			932.1
Beginning balance at Dec. 31, 2023	42,411	41,492	$ 25,602	88	(618)	16,420	919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,677	1,680				1,680	(3)
Contribution from non-controlling interest	1						1
Other comprehensive income (loss)	1,031	997			997		34
Dividends declared	(355)	(355)				(355)
Effect of stock-based compensation expense	16	16		16
Shares issued under stock option plan (shares)			1.0
Shares issued under stock option plan	42	42	$ 53	(11)
Ending balance (shares) at Jun. 30, 2024			933.1
Ending balance at Jun. 30, 2024	44,823	43,872	$ 25,655	93	379	17,745	951
Beginning balance (shares) at Mar. 31, 2024			932.6
Beginning balance at Mar. 31, 2024	43,761	42,819	$ 25,629	95	77	17,018	942
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	903	905				905	(2)
Contribution from non-controlling interest	0						0
Other comprehensive income (loss)	313	302			302		11
Dividends declared	(178)	(178)				(178)
Effect of stock-based compensation expense	3	3		3
Shares issued under stock option plan (shares)			0.5
Shares issued under stock option plan	21	21	$ 26	(5)
Ending balance (shares) at Jun. 30, 2024			933.1
Ending balance at Jun. 30, 2024	$ 44,823	$ 43,872	$ 25,655	$ 93	$ 379	$ 17,745	$ 951