ACQUISITIONS - Intangible Assets and Liabilities (Details) - Stelco Holdings Inc $ in Millions	Nov. 01, 2024 USD ($)
Intangible Asset, Acquired, Finite-Lived [Line Items]
Finite-lived intangible assets acquired	$ 1,025
Weighted average life, finite-lived intangible assets	15 years
Customer relationships
Intangible Asset, Acquired, Finite-Lived [Line Items]
Finite-lived intangible assets acquired	$ 953
Weighted average life, finite-lived intangible assets	15 years
Trade names and trademarks
Intangible Asset, Acquired, Finite-Lived [Line Items]
Finite-lived intangible assets acquired	$ 72
Weighted average life, finite-lived intangible assets	15 years