Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Offsetting of Derivative Assets (Detail)

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Fair Value Measurements - Offsetting of Derivative Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Derivative [Line Items]    
Gross Amounts of Recognized Assets $ 14.4 $ 14.5
Gross Amounts Offset in the Balance Sheet, Derivative Assets (2.8) (5.4)
Net Amounts of Assets Presented in the Balance Sheet 11.6 9.1
Foreign exchange currency contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets 14.4 14.5
Gross Amounts Offset in the Balance Sheet, Derivative Assets (2.8) (5.4)
Net Amounts of Assets Presented in the Balance Sheet $ 11.6 $ 9.1