CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions	Total	Total shareholders’ equity	Share capital	Additional paid-in capital	Accumulated other comprehensive (loss) income	Retained earnings	Non-controlling interest
Beginning balance at Dec. 31, 2021	$ 33,829	$ 33,829	$ 25,475	$ 66	$ (2,103)	$ 10,391	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,517	3,517				3,517
Other comprehensive income (Note 8)	2,194	2,194			2,194
Dividends declared ($0.76 per share)	(707)	(707)				(707)
Effect of stock-based compensation expense	23	23		23
Common Shares issued for Kansas City Southern acquisition (Note 20)	(2)	(2)		(2)
Common Shares issued under stock option plans (Note 20)	32	32	41	(9)
Ending 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)	3,923	3,927				3,927	(4)
Other comprehensive income (Note 8)	(718)	(709)			(709)		(9)
Dividends declared ($0.76 per share)	(708)	(708)				(708)
Effect of stock-based compensation expense	27	27		27
Common Shares issued under stock option plans (Note 20)	69	69	86	(17)
Non-controlling interest in connection with business acquisition (Note 10)	932						932
Ending 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)	3,713	3,718				3,718	(5)
Other comprehensive income (Note 8)	3,380	3,298			3,298		82
Dividends declared ($0.76 per share)	(709)	(709)				(709)
Effect of stock-based compensation expense	24	24		24
Common Shares issued under stock option plans (Note 20)	69	69	87	(18)
Contribution from non-controlling interest	2						2
Ending balance at Dec. 31, 2024	$ 48,890	$ 47,892	$ 25,689	$ 94	$ 2,680	$ 19,429	$ 998