Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	$ 23.0	[1]	$ 19.5	[1]
Derivatives liabilities	(19.5)	[1]	(19.7)	[1]
Contingent consideration	(35.2)		(43.0)
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	23.0		19.5
Derivatives liabilities	(19.5)		(19.7)
Available-for-sale securities	11.7		12.0
Contingent consideration	(35.2)		(43.0)
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	23.0		19.5
Derivatives liabilities	(19.5)		(19.7)
Available-for-sale securities	11.7		12.0
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (35.2)		$ (43.0)

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