Summary of Fair Value of Assets Acquired and Liabilities Assumed in Conjunction with Acquisition (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Goodwill		$ 8,019,775	$ 7,992,941
Acquisitions During Period
Business Acquisition [Line Items]
Goodwill				$ 190,190
Intangible assets with indefinite lives				163,400
Intangible assets with definite lives	[1]			140,285
Net assets and non-controlling interests acquired	[2]			(20,619)
Deferred tax liabilities, net				(7,910)
Total	[3]			$ 465,346

[1] Acquired definite-lived intangible assets primarily consist of customer relationship, reacquired right and supplier relationship assets and have estimated useful lives of between 4 and 10 years with a weighted average life of 5.7 years.

[2] Includes cash acquired of $41 million.

[3] The total purchase price includes noncash consideration of $99 million related to an equity method investment, which was consolidated upon our acquisition of a controlling interest, with the remainder paid in cash during the period.