Financial Instruments and Fair Value Measurements - Schedule of Fair Value and Classification of Derivative Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Asset	$ 68,696	$ 53,579
Liability	64,056	13,729
Foreign Currency Options [Member] \| CAD
Derivatives Fair Value [Line Items]
Asset	584	3,324
Liability	766	0
Foreign Currency Options [Member] \| GBP [Member]
Derivatives Fair Value [Line Items]
Asset	14,644	4,241
Liability	0	745
Foreign Currency Options [Member] \| EUR
Derivatives Fair Value [Line Items]
Asset	2,761	11,711
Liability	2,198	84
Foreign Currency Options [Member] \| JPY [Member]
Derivatives Fair Value [Line Items]
Asset	857	832
Liability	17,578	717
Interest Rate Hedges [Member]
Derivatives Fair Value [Line Items]
Asset	0	0
Liability	40,746	12,095
Net Investment Hedges [Member] \| CAD
Derivatives Fair Value [Line Items]
Asset	0	0
Liability	2,633	0
Net Investment Hedges [Member] \| GBP [Member]
Derivatives Fair Value [Line Items]
Asset	49,850	33,471
Liability	0	0
Cash Flow Hedge [Member] \| Foreign Currency Options [Member] \| Peso [Member]
Derivatives Fair Value [Line Items]
Asset	0	0
Liability	$ 135	$ 88

Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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