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]

Cover
- Cover
- Audit Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)
Notes Tables
Notes Details

STOCK COMPENSATION PLANS - Stock Options (Details)

v3.25.0.1

STOCK COMPENSATION PLANS - Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year (in shares)	0.5	0.6	1.0
Outstanding at beginning of year, weighted average exercise price (in dollars per share)	$ 9.59	$ 10.39	$ 12.75
Exercised (in shares)	(0.3)	(0.1)	(0.3)
Exercised, weighted average exercise price (in dollars per share)	$ 7.79	$ 10.22	$ 16.55
Forfeited/canceled (in shares)	0.0	0.0	(0.1)
Forfeitured/canceled, weighted average exercise price (in dollars per share)	$ 20.11	$ 21.05	$ 22.78
Outstanding at end of year (in shares)	0.2	0.5	0.6
Outstanding at end of year, weighted average exercise price (in dollars per share)	$ 11.77	$ 9.59	$ 10.39
Exercisable (in shares)	0.2	0.5	0.6
Exercisable, weighted average exercise price (in dollars per share)	$ 11.77	$ 9.59	$ 10.52
Intrinsic value of options exercised	$ 4	$ 1
Weighted-average remaining contractual life of options outstanding	3 years
Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Performance/vesting period	1 year
Expiration period	10 years
Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Performance/vesting period	3 years

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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