Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2024

Cash Flow Statement [Abstract]

Summary of Cash Flow Information

(CAD$ in millions)	December 31, 2024		December 31, 2023
Cash and cash equivalents
Cash	$	2,343	$	399
Investments with maturities from the date of acquisition of three months or less	5,244		345
	$	7,587	$	744

Summary of Non-Cash Working Capital Items

(CAD$ in millions)	2024		2023
Net change in non-cash working capital items
Trade and settlement receivables	$	(347)	$	(123)
Inventories	(374)		(439)
Prepaids and other current assets	(29)		(253)
Trade accounts payable and other liabilities	474		272
	$	(276)	$	(543)

Summary of Cash Flows From Investing Activities

(CAD$ in millions)	2024		2023
Net proceeds from sale of discontinued operations and other
Net proceeds from sale of steelmaking coal business	$	9,483	$	—
Proceeds from sale of Fort Hills	—		1,014
Proceeds from other assets	55		34
	$	9,538	$	1,048