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

FAIR VALUE OF FINANCIAL INSTRUMENTS - Changes in Fair Value of Employee Benefit Commitment (Details)

v3.25.0.1
FAIR VALUE OF FINANCIAL INSTRUMENTS - Changes in Fair Value of Employee Benefit Commitment (Details) - Commitments
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance as of January 1 $ 0
Fair value of commitment assumed in connection with Stelco Acquisition (197)
Total losses included in earnings (2)
Payments 5
Foreign currency translation 6
Ending balance as of December 31 $ (188)