Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE (Earnings Per Share Computation) (Details)

v3.7.0.1
EARNINGS PER SHARE (Earnings Per Share Computation) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Income from Continuing Operations $ 76.5 $ 29.9 $ 46.2 $ 144.2
Loss (Income) from Continuing Operations Attributable to Noncontrolling Interest 1.7 (16.7) 3.4 (25.5)
Net Income from Continuing Operations Attributable to Cliffs Shareholders 78.2 13.2 49.6 118.7
Income (Loss) from Discontinued Operations, net of tax (46.4) (0.4) (45.9) 2.1
NET INCOME (LOSS) ATTRIBUTABLE TO CLIFFS SHAREHOLDERS $ 31.8 $ 12.8 $ 3.7 $ 120.8
Weighted Average Number of Shares:        
Basic 296.1 182.3 280.6 177.0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements 4.6 2.3 4.6 1.3
Diluted 300.7 184.6 285.2 178.3
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:        
Continuing operations (in dollars per share) $ 0.26 $ 0.07 $ 0.18 $ 0.67
Discontinued operations (in dollars per share) (0.16) 0.00 (0.16) 0.01
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic (in dollars per share) 0.10 0.07 0.02 0.68
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:        
Continuing operations (in dollars per share) 0.26 0.07 0.17 0.67
Discontinued operations (in dollars per share) (0.15) 0.00 (0.16) 0.01
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted (in dollars per share) $ 0.11 $ 0.07 $ 0.01 $ 0.68