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Goodwill (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Line Items]    
Goodwill, Beginning Balance $ 756.3 $ 845.5
Translation adjustment (177.3) (89.2)
Goodwill, Ending Balance $ 579.0 $ 756.3