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Components of Income Before Income Taxes (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax [Line Items]      
Domestic $ 786.6 $ 607.0 $ 186.3
Foreign 842.3 899.9 474.0
Income Before Income Taxes $ 1,628.9 $ 1,506.9 $ 660.3