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Funded Status (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
U.S. Benefit Plans      
Funded status, end of year      
Fair value of plan assets $ 128.1 $ 134.0 $ 129.4
Benefit obligations 174.3 186.3 159.3
Funded status (46.2) (52.3)  
Non-U.S. Benefit Plan      
Funded status, end of year      
Fair value of plan assets 54.3 59.0 62.4
Benefit obligations 55.7 62.7 $ 59.9
Funded status $ (1.4) $ (3.7)