Financial Instruments and Fair Value Measurements - Summary of Gains (Losses) From Change in Fair Value of Derivative Instruments Included in Other Comprehensive Income (Parenthetical) (Detail) € in Billions	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)
Derivative Instruments Gain Loss [Line Items]
Amount received from (paid for) on settlement of net investment hedges	$ 900,000	$ 1,500,000
Interest expense reclassified	80,812,000	68,761,000
Debt	11,687,171,000				$ 11,626,831,000
Amount of gain (loss) included in AOCI	1,461,000	(124,279,000)
Forward Contracts
Derivative Instruments Gain Loss [Line Items]
Debt	0				0
Amount of gain (loss) included in AOCI	0	$ 15,400,000
Designated As Hedging Instrument [Member] | Forward Contracts
Derivative Instruments Gain Loss [Line Items]
Debt	3,600,000,000			€ 3.2	$ 3,500,000,000	€ 3.2
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Derivative Instruments Gain Loss [Line Items]
Interest expense reclassified	$ 1,000,000
Scenario Forecast | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Derivative Instruments Gain Loss [Line Items]
Interest expense reclassified			$ 5,900,000