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Income Taxes - Income Tax Data from Continuing Operations (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income (loss) components:      
United States $ 33.0 $ (464.4) $ (392.0)
International 116.1 148.5 119.4
Income (loss) from continuing operations before income tax 149.1 (315.9) (272.6)
Current income tax expense (benefit):      
United States - federal (32.6) (78.9) (59.5)
United States - state and local (8.7) (12.1)  
International 46.8 49.2 27.7
Total current income tax expense (benefit) 5.5 (41.8) (31.8)
Deferred income tax expense (benefit) components:      
United States - federal 40.1 318.2 (98.7)
United States - state and local 9.9 (14.6) (15.3)
International (15.9) (1.2) 3.6
Total deferred income tax expense (benefit) 34.1 302.4 (110.4)
Income tax expense (benefit) $ 39.6 $ 260.6 $ (142.2)
Effective income tax rate 26.60% (82.50%) 52.20%