Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Components of Accumulated Other Comprehensive Income (Loss) (Detail)

v3.6.0.2
Basis of Presentation - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]      
Foreign currency translation adjustment, net of tax $ (215.5) $ (183.0) $ (96.4)
Unrealized gain on derivatives, net of tax 10.4 17.4 18.0
Unrealized gain on available-for-sale investments, net of tax   0.1 0.2
Total accumulated other comprehensive loss $ (205.1) $ (165.5) $ (78.2)