Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	[1]	$ 31.9	$ 29.3
Derivatives liabilities	[1]	(25.9)	(23.5)
Contingent consideration		(28.7)	(32.6)	$ (43.0)
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets		31.9	29.3
Derivatives liabilities		(25.9)	(23.5)
Available-for-sale securities			1.5
Contingent consideration		(28.7)	(32.6)
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets		31.9	29.3
Derivatives liabilities		(25.9)	(23.5)
Available-for-sale securities			1.5
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration		$ (28.7)	$ (32.6)

[1] Consolidated balance sheet location: Asset: Other current and non-current assets Liability: Other current and non-current liabilities