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

EARNINGS PER SHARE - Earnings Per Share Computation (Details)

v3.25.4
EARNINGS PER SHARE - Earnings Per Share Computation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings Per Share [Abstract]      
Income (loss) from continuing operations $ (1,423) $ (714) $ 435
Income from continuing operations attributable to noncontrolling interest 50 46 51
Net income (loss) from continuing operations attributable to Cliffs shareholders (1,473) (760) 384
Income (loss) from discontinued operations, net of tax (5) 0 1
Net income (loss) attributable to Cliffs shareholders $ (1,478) $ (760) $ 385
Weighted average number of shares:      
Basic (in shares) 508 480 510
Employee stock plans (in shares) 0 0 1
Diluted (in shares) 508 480 511
Earnings per common share attributable to Cliffs common shareholders - basic      
Continuing operations (in dollars per share) $ (2.90) $ (1.58) $ 0.75
Discontinued operations (in dollars per share) (0.01) 0 0
Earnings (loss) per common share attributable to Cliffs common shareholders - basic (in dollars per share) (2.91) (1.58) 0.75
Earnings (loss) per common share attributable to Cliffs common shareholders - diluted:      
Continuing operations (in dollars per share) (2.90) (1.58) 0.75
Discontinued operations (in dollars per share) (0.01) 0 0
Earnings (loss) per common share attributable to Cliffs common shareholders - diluted (in dollars per share) $ (2.91) $ (1.58) $ 0.75