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Summary of Change in Plan Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
U.S. Benefit Plans    
Change in Plan Assets    
Fair value of plan assets, beginning of year $ 134.0 $ 129.4
Actual return on plan assets (3.3) 5.9
Company contribution 7.0 8.2
Benefits and expenses paid (9.6) (9.5)
Translation and other 0.0 0.0
Fair value of plan assets, end of year 128.1 134.0
Non-U.S. Benefit Plan    
Change in Plan Assets    
Fair value of plan assets, beginning of year 59.0 62.4
Actual return on plan assets 0.8 2.2
Company contribution 1.1 1.2
Benefits and expenses paid (3.5) (3.1)
Translation and other (3.1) (3.7)
Fair value of plan assets, end of year $ 54.3 $ 59.0