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Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Other Liabilities Noncurrent [Abstract]    
Reserve for uncertain tax positions $ 7.3 $ 11.8
Employee benefits 7.8 7.5
Interest rate swap contract 0.2 0.2
Other 7.1 4.9
Total $ 22.4 $ 24.4