Goodwill (Tables)

12 Months Ended

Dec. 31, 2024

Intangible Assets [Abstract]

Summary of Goodwill

(CAD$ in millions)	Steelmaking Coal Business		Quebrada Blanca		Total
At January 1, 2023	$	702	$	416	$	1,118
Changes in foreign exchange rates	—		(10)		(10)
At December 31, 2023	$	702	$	406	$	1,108
Changes in foreign exchange rates	—		36		36
Sale of steelmaking coal business	(702)		—		(702)
At December 31, 2024	$	—	$	442	$	442