Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Assets and Liabilities - Asia Pacific Iron Ore (Details)

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DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Assets and Liabilities - Asia Pacific Iron Ore (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Current assets of discontinued operations $ 12.4 $ 118.5 $ 118.5
Current liabilities of discontinued operations 6.7 $ 75.0 75.0
Asia Pacific Iron Ore [Member]      
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents 12.4   29.4
Disposal Group, Including Discontinued Operation, Accounts Receivable, Net 0.0   33.9
Disposal Group, Including Discontinued Operation, Inventory 0.0   45.0
Disposal group, including Discontinued Operations, Supplies and other inventories 0.0   5.1
Disposal Group, Including Discontinued Operation, Other Assets, Current 0.0   5.1
Current assets of discontinued operations 12.4   118.5
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment 0.0   17.2
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent 0.0   3.1
Disposal Group, Including Discontinued Operation, Assets 12.4   138.8
Disposal Group, Including Discontinued Operation, Accounts Payable 3.4   28.2
Disposal Group, Including Discontinued Operation, Accrued Liabilities 0.4   28.0
Disposal Group, Including Discontinued Operation, Other Liabilities, Current 0.0   15.6
Current liabilities of discontinued operations 3.8   71.8
Disposal Group, Including Discontinued Operations, Environmental and mine closure obligations 0.0   28.8
Disposal Group, Including Discontinued Operation, Other Liabilities 8.3   23.4
Disposal Group, Including Discontinued Operation, Liabilities $ 12.1   $ 124.0