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Income Taxes - Components of Income Tax Expense (benefit) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income (loss) before income taxes:      
Domestic $ 53.5 $ 97.8 $ (8.8)
Foreign 81.8 76.1 63.0
Income before tax 135.3 173.9 54.2
Currently payable:      
Federal 21.9 31.7 43.8
Foreign 27.5 23.6 18.8
State and local 2.9 8.4 7.0
Current Income Tax Expense (Benefit), Total 52.3 63.7 69.6
Deferred:      
Federal (9.3) (14.3) (81.5)
Foreign (4.5) 4.0 (0.4)
State and local (0.1) (5.3) (6.8)
Deferred Income Tax Expense (Benefit), Total (13.9) (15.6) (88.7)
Income taxes $ 38.4 $ 48.1 $ (19.1)