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Quarterly report [Sections 13 or 15(d)]

CAPITAL STOCK - Narrative (Details)

v3.25.1
CAPITAL STOCK - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Nov. 01, 2024
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
Mar. 31, 2024
USD ($)
shares
Nov. 01, 2024
$ / shares
Nov. 01, 2024
$ / shares
Apr. 22, 2024
USD ($)
Feb. 10, 2022
USD ($)
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Authorized amount of stock repurchase | $ Ìý Ìý Ìý Ìý Ìý $ 1,500 $ 1,000
Repurchase of common shares | $ Ìý $ 0 $ 608 Ìý Ìý Ìý Ìý
Remaining authorized amount of stock repurchase | $ Ìý $ 1,400 Ìý Ìý Ìý Ìý Ìý
Stelco Holdings Inc Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Price per share (in dollars per share) | (per share) Ìý Ìý Ìý $ 60.00 $ 13.27 Ìý Ìý
Business Acquisition, Shares Exchange Ratio 0.454 Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Shares, Acquisitions 25,900,000 Ìý Ìý Ìý Ìý Ìý Ìý
Stock Issued During Period, Value, Acquisitions | $ $ 343 Ìý Ìý Ìý Ìý Ìý Ìý
Common Stock Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock repurchases (shares) Ìý 0 30,400,000 Ìý Ìý Ìý Ìý
Common Shares in Treasury Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Repurchase of common shares | $ Ìý Ìý $ 608 Ìý Ìý Ìý Ìý
Series A Preferred Stock Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Preferred stock authorized (in shares) Ìý 3,000,000 Ìý Ìý Ìý Ìý Ìý
Preferred stock outstanding (in shares) Ìý 0 Ìý Ìý Ìý Ìý Ìý
Preferred stock issued (in shares) Ìý 0 Ìý Ìý Ìý Ìý Ìý
Series B Preferred Stock Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Class of Stock [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Preferred stock authorized (in shares) Ìý 4,000,000 Ìý Ìý Ìý Ìý Ìý
Preferred stock outstanding (in shares) Ìý 0 Ìý Ìý Ìý Ìý Ìý
Preferred stock issued (in shares) Ìý 0 Ìý Ìý Ìý Ìý Ìý