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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Goodwill (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 1,130	$ 1,130
Steelmaking
Goodwill [Line Items]
Goodwill	956	956
Other Businesses
Goodwill [Line Items]
Goodwill	$ 174	$ 174

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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