Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Effective Income Tax Reconciliation) (Details)

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INCOME TAXES (Effective Income Tax Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Tax at U.S. statutory rate of 35 percent $ (175.6) $ 766.7 $ 443.2
Increase (decrease) due to:      
Foreign exchange remeasurement 62.3 (62.6) 0
Non-taxable loss (income) related to noncontrolling interests 61.0 (63.6) 0
Impact of tax law change (357.1) 0 16.1
Percentage depletion in excess of cost depletion (109.1) (153.4) (103.1)
Impact of foreign operations 65.2 (44.0) (89.0)
Legal entity restructuring 0 0 (87.4)
Income not subject to tax (108.0) (67.5) 0
Goodwill impairment 202.2 0 0
Non-taxable hedging income 0 (32.4) 0
State taxes, net 7.3 7.5 3.1
Manufacturer’s deduction (4.7) (11.9) 0
Valuation allowance 634.5 49.5 83.3
Tax uncertainties (14.8) 17.7 27.7
Other items — net (7.3) 1.7 (11.4)
Income tax expense $ 255.9 $ 407.7 $ 282.5