Financial Instruments and Fair Value Measurements - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) Derivative	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Derivative	Jun. 30, 2015 USD ($) Contracts	Dec. 31, 2015 USD ($) Derivative
Derivatives Fair Value [Line Items]
Hedge ineffectiveness	$ 0	$ 0	$ 0	$ 0
Number of interest rate swaps hedges outstanding | Derivative	7		7		7
Number of contracts entered into to effectively fix the interest rate on a term loan denominated in yen | Contracts				2
Loss from option contracts exercised	$ 200,000	4,000,000	$ 1,900,000	$ 6,200,000
Foreign currency translation gains (losses)	(136,000,000)	215,500,000	18,800,000	(306,900,000)
Foreign Currency Options [Member]
Derivatives Fair Value [Line Items]
Gains (losses) on foreign exchange transactions	3,300,000	$ (10,600,000)	(13,500,000)	$ 9,500,000
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Notional amount of interest rate swaps	1,400,000,000		1,400,000,000		$ 1,400,000,000
Interest Rate Hedges [Member] | JPY
Derivatives Fair Value [Line Items]
Loss from option contracts exercised	$ (4,700,000)		$ (11,400,000)