Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE - Earnings Per Share Computation (Details)

v3.21.2
EARNINGS PER SHARE - Earnings Per Share Computation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share [Abstract]        
Income (loss) from continuing operations $ 1,281 $ 2 $ 2,132 $ (155)
Income attributable to noncontrolling interest (8) (12) (39) (31)
Net income (loss) from continuing operations attributable to Cliffs shareholders 1,273 (10) 2,093 (186)
Income from discontinued operations, net of tax 1 0 2 0
Net income (loss) attributable to Cliffs shareholders $ 1,274 $ (10) $ 2,095 $ (186)
Weighted average number of shares:        
Basic (in shares) 500 399 497 365
Redeemable preferred shares (in shares) 17 0 44 0
Convertible senior notes (in shares) 24 0 21 0
Employee stock plans (in shares) 6 0 5 0
Diluted (in shares) 547 399 567 365
Earnings Per Share, Basic [Abstract]        
Continuing operations (in dollars per share) $ 2.46 $ (0.02) $ 3.87 $ (0.51)
Discontinued operations (in dollars per share) 0 0 0 0
Earnings (Loss) per Common Share - Basic (in dollars per share) 2.46 (0.02) 3.87 (0.51)
Earnings Per Share, Diluted [Abstract]        
Continuing operations (in dollars per share) 2.33 (0.02) 3.69 (0.51)
Discontinued operations (in dollars per share) 0 0 0 0
Earnings (Loss) per Common Share - Diluted (in dollars per share) $ 2.33 $ (0.02) $ 3.69 $ (0.51)
Undistributed Earnings (Loss) Available to Common Shareholders, Basic $ 42   $ 172