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Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Calculation Of Earnings Per Common Share On Basic And Diluted) (Details)

v2.3.0.15
Earnings Per Share (Calculation Of Earnings Per Common Share On Basic And Diluted) (Details) (USD $)
In Millions, except Share data
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Earnings Per Share [Abstract] Ìý Ìý Ìý Ìý
Net income from continuing operations attributable to Cliffs shareholders $ 607.0 $ 298.1 $ 1,439.3 $ 637.4
Loss from discontinued operations (17.5) (0.7) (18.7) (2.0)
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS $ 589.5 $ 297.4 $ 1,420.6 $ 635.4
Weighted average number of shares: Ìý Ìý Ìý Ìý
Basic 144,203,000 135,345,000 139,563,000 135,280,000
Employee stock plans 800,000 900,000 800,000 800,000
Diluted 144,989,000 136,213,000 140,321,000 136,098,000
Continuing operations $ 4.21 $ 2.20 $ 10.31 $ 4.71
Discontinued operations $ (0.12) Ìý $ (0.13) $ (0.01)
Earnings per common share attributable to Cliffs shareholders - Basic $ 4.09 $ 2.20 $ 10.18 $ 4.70
Continuing operations $ 4.19 $ 2.19 $ 10.25 $ 4.68
Discontinued operations $ (0.12) $ (0.01) $ (0.13) $ (0.01)
Earnings per common share attributable to Cliffs shareholders - Diluted $ 4.07 $ 2.18 $ 10.12 $ 4.67