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Components Of Earnings (Loss) From Operations Before Income Taxes (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Income Before Income Tax [Line Items]      
U.S. $ (710.1) $ (274.5) $ 171.0
Foreign 70.1 37.1 152.0
Earnings (loss) before income taxes $ (640.0) $ (237.4) $ 323.0