Annual report [Section 13 and 15(d), not S-K Item 405]

SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION - Non-cash Investing and Financing Activities (Details)

v3.25.0.1
SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION - Non-cash Investing and Financing Activities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Noncash or Part Noncash Acquisitions [Line Items]      
1.500% 2025 Convertible Senior Notes redemption $ 0 $ 0 $ 25
Stelco Holdings Inc      
Noncash or Part Noncash Acquisitions [Line Items]      
Other Significant Noncash Transaction, Value of Consideration Given, Common Shares $ (343)