Annual report pursuant to Section 13 and 15(d)

Domestic and Foreign Income from Continuing Operations before Income Taxes (Detail)

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Domestic and Foreign Income from Continuing 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 Components of Income Before Income Tax Expense (Benefit) [Line Items]      
U.S. $ 350.7 $ 340.9 $ 268.2
Foreign 89.5 67.3 107.0
Consolidated income from continuing operations before income taxes $ 440.2 $ 408.2 $ 375.2