(Financial Instruments and Hedging Activities - Additional Information) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	$ 714,600,000
Cumulative deferred hedging gains, after tax, included in accumulated other comprehensive income	47,900,000
Foreign currency denominated royalties
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Period covered by hedge	18 months
Derivative, Notional Amount	340,500,000
Cross Currency Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Period covered by hedge	24 months
Derivative, Notional Amount	142,600,000
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	2,700,000,000
Intercompany Debt [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates	3,400,000,000
Debt [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates	3,800,000,000
Fair Value Hedging [Member] | Interest Rate Risk [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 8,100,000