Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE - Earnings Per Share Computation (Details)

v3.22.1
EARNINGS PER SHARE - Earnings Per Share Computation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Earnings Per Share [Abstract]    
Income from continuing operations $ 813 $ 57
Income attributable to noncontrolling interest (13) (16)
Net income from continuing operations attributable to Cliffs shareholders 800 41
Income from discontinued operations, net of tax 1 0
Net income attributable to Cliffs shareholders $ 801 $ 41
Weighted average number of shares:    
Basic (in shares) 521 490
Redeemable preferred shares (in shares) 0 58
Convertible senior notes (in shares) 7 19
Employee stock plans (in shares) 4 4
Diluted (in shares) 532 571
Earnings per common share attributable to Cliffs shareholders - basic:    
Continuing operations (in dollars per share) $ 1.54 $ 0.08
Discontinued operations (in dollars per share) 0 0
Earnings per Common Share - Basic (in dollars per share) 1.54 0.08
Earnings per common share attributable to Cliffs shareholders - diluted:    
Continuing operations (in dollars per share) 1.50 0.07
Discontinued operations (in dollars per share) 0 0
Earnings (Loss) per Common Share - Diluted (in dollars per share) $ 1.50 $ 0.07
Undistributed Earnings (Loss) Available to Common Shareholders, Basic   $ 4