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v3.8.0.1

QUARTERLY RESULTS OF OPERATIONS (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  |  |  |  | 25,300,000 |
Revenues | $ 600.9 | $ 698.4 | $ 569.3 | $ 461.6 | $ 754.0 | $ 553.3 | $ 496.2 | $ 305.5 |  | $ 2,330.2 | $ 2,109.0 | $ 2,013.3
SALES MARGIN | 100.7 | 160.2 | 145.1 | 95.7 | 181.5 | 85.4 | 91.5 | 30.9 |  | 501.7 | 389.3 | 236.5
INCOME FROM CONTINUING OPERATIONS | 315.0 | 20.6 | 76.5 | (30.3) | 100.1 | (25.1) | 29.9 | 114.3 |  | 381.8 | 219.2 | 143.7
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest | 0.0 | 0.5 | 1.7 | 1.7 | (1.7) | 2.0 | (16.7) | (8.8) |  | 3.9 | (25.2) | (8.6)
Income (Loss) from Continuing Operations Attributable to Parent | 315.0 | 21.1 | 78.2 | (28.6) |  | (23.1) | 13.2 | 105.5 | $ 98.4 | 385.7 | 194.0 | 135.1
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | (5.1) | 32.3 | (46.4) | 0.5 | $ (19.3) | (2.7) | (0.4) | 2.5 |  | (18.7) | (19.9) | (884.4)
NET INCOME (LOSS) ATTRIBUTABLE TO CLIFFS SHAREHOLDERS | $ 309.9 | $ 53.4 | $ 31.8 | $ (28.1) |  | $ (25.8) | $ 12.8 | $ 108.0 | $ 79.1 | 367.0 | 174.1 | (749.3)
Dividends, Preferred Stock |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 38.4
NET INCOME (LOSS) ATTRIBUTABLE TO CLIFFS COMMON SHAREHOLDERS |  |  |  |  |  |  |  |  |  | $ 367.0 | $ 174.1 | $ (787.7)
Continuing operations | $ 1.06 | $ 0.07 | $ 0.26 | $ (0.11) | $ 0.43 | $ (0.11) | $ 0.07 | $ 0.61 |  | $ 1.34 | $ 0.98 | $ 0.63
Discontinued operations | (0.02) | 0.11 | (0.16) | 0.00 | (0.08) | (0.01) | 0.00 | 0.01 |  | (0.06) | (0.10) | (5.77)
Earnings Per Share, Basic | 1.04 | 0.18 | 0.10 | (0.11) | 0.35 | (0.12) | 0.07 | 0.62 |  | 1.28 | 0.88 | (5.14)
Continuing operations | 1.05 | 0.07 | 0.26 | (0.11) | 0.42 | (0.11) | 0.07 | 0.61 |  | 1.32 | 0.97 | 0.63
Discontinued operations | (0.02) | 0.11 | (0.15) | 0.00 | (0.08) | (0.01) | 0.00 | 0.01 |  | (0.06) | (0.10) | (5.76)
Earnings Per Share, Diluted | $ 1.03 | $ 0.18 | $ 0.11 | $ (0.11) | $ 0.34 | $ (0.12) | $ 0.07 | $ 0.62 |  | $ 1.26 | $ 0.87 | $ (5.13)
Antidilutive Incremental Common Shares Excluded and Attributable to Share-based Payment Arrangements | 0 | 0 | 0 | 4,600,000 | 0 | 3,000,000 | 0 | 0 |  |  |  |
Preferred Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Preferred Stock |  |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ 38.4

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