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DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Income Statement - Asia Pacific Iron Ore (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
INCOME FROM DISCONTINUED OPERATIONS, net of tax | $ 88.2 | $ 2.5 | $ 76.7
Asia Pacific Iron Ore [Member] |  |  |
Revenues from product sales and services | 129.1 | 464.2 | 554.5
Cost of goods sold and operating expenses | 230.7 | 427.9 | 440.9
Sales margin | (101.6) | 36.3 | 113.6
Other operating expense | 3.3 | 9.9 | 10.4
Other expense | 2.3 | 5.2 | 6.6
Gain on foreign currency translation | 228.1 | 0.0 | 0.0
Impairment of long-lived assets | 2.6 | 0.0 | 0.0
INCOME FROM DISCONTINUED OPERATIONS, net of tax | $ 118.3 | $ 21.2 | $ 96.6

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