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Income Taxes - Income (Loss) Before Income Taxes and Noncontrolling Interest (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]      
Federal $ (25.6) $ (21.8) $ (15.8)
International 586.6 534.3 486.7
Income from continuing operations before income taxes $ 561.0 $ 512.5 $ 470.9