Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Income Statement - North American Coal (Details)

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DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Income Statement - North American Coal (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of Disposal Groups, Including Discontinued Operations, Assets and Liabilities [Line Items]      
Discontinued Operation, Tax Effect of Discontinued Operation $ (6.0) $ (1,216.0) $ (184.5)
LOSS FROM DISCONTINUED OPERATIONS, net of tax (892.1) (8,368.0) (517.1)
North American Coal [Member]      
Schedule of Disposal Groups, Including Discontinued Operations, Assets and Liabilities [Line Items]      
Disposal Group, Including Discontinued Operation, Revenue 392.9 687.1 821.9
Disposal Group, Including Discontinued Operation, Costs of Goods Sold (449.2) (822.9) (836.4)
Disposal Group, Including Discontinued Operation, Gross Profit (Loss) (56.3) (135.8) (14.5)
Disposal Group, Including Discontinued Operation, Operating Expense (30.4) (20.8) (13.8)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax 9.3 (419.6) 0.0
Disposal Group, Including Discontinued Operation, Other Expense (1.8) (3.0) (2.4)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax (79.2) (579.2) (3.1)
Impairment of Long-Lived Assets to be Disposed of (73.4) (857.5) 0.0
Discontinued Operation, Tax Effect of Discontinued Operation 0.2 302.2 (6.2)
LOSS FROM DISCONTINUED OPERATIONS, net of tax $ (152.4) $ (1,134.5) $ (9.3)