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

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

ACQUISITIONS - Stelco Acquisition (Details)

ACQUISITIONS - Stelco Acquisition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Acquisition related costs	$ 42
Revenues	19,185	$ 21,996	$ 22,989
Net loss attributable to acquisition	(754)	399	$ 1,335
Stelco Holdings Inc
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)	(623)	216
Revenues	329
Net loss attributable to acquisition	58
Stelco Holdings Inc \| Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)	23	23
Stelco Holdings Inc \| Acquisition-related Costs
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)	$ 63	$ 63

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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