Schedule of Cash Flow Statement Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net cash provided by operating activities	$ 1,108,323	$ 1,726,097	$ 1,662,031
Investing activities:
Capital expenditures, including internal-use software and website development		(379,981)	(468,727)
Purchases of investments		(20,446)	(506,109)
Sales and maturities of investments		22,758	226,325
Acquisitions, net of cash acquired			(327,362)
Proceeds from sale of business, net of cash divested and disposal costs			527,212
Other, net		(16,859)	39,895
Net cash provided by (used in) investing activities		(394,528)	(508,766)
Financing activities:
Proceeds from issuance of long-term debt, net of debt issuance costs		(1,664)	702,348
Payment of HomeAway Convertible Notes		(400,443)
Purchases of treasury stock		(328,311)	(44,925)
Issuance of treasury stock			22,487
Withholding taxes for stock option exercises		(1,282)	(85,033)
Other, net		(18,453)	91,163
Net cash provided by (used in) financing activities	(612,951)	(748,489)	686,040
Effect of exchange rate changes on cash and cash equivalents		37,145	(54,876)
Net increase in cash and cash equivalents		620,225	1,784,429
Cash and cash equivalents at beginning of period	1,676,299	1,676,299	1,402,700
Cash and cash equivalents at end of period		2,296,524	3,187,129
Parent
Financing activities:
Proceeds from issuance of long-term debt, net of debt issuance costs			702,348
Purchases of treasury stock		(328,311)	(44,925)
Issuance of treasury stock			22,487
Withholding taxes for stock option exercises		(1,282)	(85,033)
Transfers (to) from related parties		333,702	(675,864)
Other, net		(4,109)	80,987
Guarantor Subsidiaries
Operating activities:
Net cash provided by operating activities		1,527,488	1,248,954
Investing activities:
Capital expenditures, including internal-use software and website development		(341,818)	(438,301)
Transfers (to) from related parties		(172,731)
Purchases of investments			(458,318)
Sales and maturities of investments		22,758	142,593
Acquisitions, net of cash acquired			(273,000)
Other, net		(19,081)	29,460
Net cash provided by (used in) investing activities		(510,872)	(997,566)
Financing activities:
Payment of HomeAway Convertible Notes		(400,443)
Transfers (to) from related parties		(83,370)	1,179,655
Other, net		(3,052)	(1,290)
Net cash provided by (used in) financing activities		(486,865)	1,178,365
Effect of exchange rate changes on cash and cash equivalents		21,609	(33,037)
Net increase in cash and cash equivalents		551,360	1,396,716
Cash and cash equivalents at beginning of period	841,696	841,696	943,976
Cash and cash equivalents at end of period		1,393,056	2,340,692
Non-Guarantor Subsidiaries
Operating activities:
Net cash provided by operating activities		198,609	413,077
Investing activities:
Capital expenditures, including internal-use software and website development		(38,163)	(30,426)
Transfers (to) from related parties		172,731
Purchases of investments		(20,446)	(47,791)
Sales and maturities of investments			83,732
Acquisitions, net of cash acquired			(54,362)
Proceeds from sale of business, net of cash divested and disposal costs			527,212
Other, net		2,222	10,435
Net cash provided by (used in) investing activities		116,344	488,800
Financing activities:
Transfers (to) from related parties		(250,332)	(503,791)
Other, net		(11,292)	11,466
Net cash provided by (used in) financing activities		(261,624)	(492,325)
Effect of exchange rate changes on cash and cash equivalents		15,536	(21,839)
Net increase in cash and cash equivalents		68,865	387,713
Cash and cash equivalents at beginning of period	$ 834,603	834,603	458,724
Cash and cash equivalents at end of period		$ 903,468	$ 846,437