Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Assets and Liabilities - Canadian Entities (Details)

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DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Assets and Liabilities - Canadian Entities (Details) - Canadian Entities [Member]
$ in Millions
Dec. 31, 2014
USD ($)
Schedule of Disposal Groups, Including Discontinued Operations, Assets and Liabilities [Line Items]  
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents $ 19.7
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net 37.9
Disposal Group, Including Discontinued Operation, Inventory 16.3
Disposal group, including Discontinued Operations, Prepaid Supplies 48.5
Disposal group, including Discontinued Operations, Income taxes receivable 20.1
Disposal Group, Including Discontinued Operation, Other Assets, Current 44.3
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment 249.8
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent 19.9
Disposal Group, Including Discontinued Operation, Assets 456.5
Disposal Group, Including Discontinued Operation, Accounts Payable 83.6
Disposal Group, Including Discontinued Operation, Accrued Liabilities 200.0
Disposal Group, Including Discontinued Operation, Other Liabilities, Current 35.7
Disposal group, Including Discontinued Operation, Pension and Other Postretirement Obligations 79.8
Disposal Group Including Discontinued Operations Environmental Loss Contingency And Mine Reclamation And Closing Liability CurrentAnd Noncurrent 56.5
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent 173.9
Disposal Group, Including Discontinued Operation, Liabilities $ 629.5