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Income Taxes - Components of Earnings (Loss) Before Income Tax Provision (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Domestic $ 168.7 $ 102.8 $ (62.2)
Foreign 397.2 323.1 329.4
Earnings before income tax provision $ 565.9 $ 425.9 $ 267.2