Guarantor and Non-Guarantor Supplemental Financial Information - Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands							9 Months Ended
	Jul. 27, 2016	Apr. 26, 2016	Feb. 08, 2016	Jul. 29, 2015	Apr. 29, 2015	Feb. 04, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net cash provided by operating activities							$ 1,543,678	$ 1,541,526
Investing activities:
Capital expenditures, including internal-use software and website development							(567,044)	(625,439)
Transfers (to) from related parties							0
Purchases of investments							(20,446)	(512,329)
Sales and maturities of investments							31,637	392,271
Acquisitions, net of cash acquired							(777)	(1,933,821)
Proceeds from sale of business, net of cash divested and disposal costs							0	523,882
Other, net							(32,293)	51,640
Net cash used in investing activities							(588,923)	(2,103,796)
Financing activities:
Payment of HomeAway Convertible Notes							(401,424)
Proceeds from issuance of long-term debt, net of issuance costs							(1,792)	700,454
Purchases of treasury stock							(366,723)	(48,694)
Payment of dividends to stockholders	$ (39,062)	$ (35,773)	$ (36,174)	$ (31,182)	$ (23,096)	$ (22,895)	(111,009)	(77,173)
Issuance of treasury stock							0	22,575
Proceeds from exercise of equity awards							103,760	83,298
Withholding taxes for stock option exercises							(1,282)	(85,033)
Transfers (to) from related parties							0	0
Other, net							(36,827)	129,381
Net cash provided by (used in) financing activities							(815,297)	724,808
Effect of exchange rate changes on cash and cash equivalents							28,718	(109,899)
Net increase in cash and cash equivalents							168,176	52,639
Cash and cash equivalents at beginning of period							1,676,299	1,402,700
Cash and cash equivalents at end of period							1,844,475	1,455,339
Parent
Operating activities:
Net cash provided by operating activities							0	0
Investing activities:
Capital expenditures, including internal-use software and website development							0	0
Transfers (to) from related parties							0
Purchases of investments							0	0
Sales and maturities of investments							0	0
Acquisitions, net of cash acquired							0	0
Proceeds from sale of business, net of cash divested and disposal costs								0
Other, net							0	0
Net cash used in investing activities							0	0
Financing activities:
Payment of HomeAway Convertible Notes							0
Proceeds from issuance of long-term debt, net of issuance costs							(1,792)	700,454
Purchases of treasury stock							(366,723)	(48,694)
Payment of dividends to stockholders							(111,009)	(77,173)
Issuance of treasury stock								22,575
Proceeds from exercise of equity awards							103,760	82,108
Withholding taxes for stock option exercises							(1,282)	(85,033)
Transfers (to) from related parties							377,321	(679,700)
Other, net							(275)	85,463
Net cash provided by (used in) financing activities							0	0
Effect of exchange rate changes on cash and cash equivalents							0	0
Net increase in cash and cash equivalents							0	0
Cash and cash equivalents at beginning of period							0	0
Cash and cash equivalents at end of period							0	0
Guarantor Subsidiaries
Operating activities:
Net cash provided by operating activities							1,094,505	911,173
Investing activities:
Capital expenditures, including internal-use software and website development							(474,982)	(570,619)
Transfers (to) from related parties							(172,731)
Purchases of investments							0	(464,538)
Sales and maturities of investments							28,257	308,539
Acquisitions, net of cash acquired							0	(1,870,030)
Proceeds from sale of business, net of cash divested and disposal costs								0
Other, net							(30,158)	39,975
Net cash used in investing activities							(649,614)	(2,556,673)
Financing activities:
Payment of HomeAway Convertible Notes							(401,424)
Proceeds from issuance of long-term debt, net of issuance costs							0	0
Purchases of treasury stock							0	0
Payment of dividends to stockholders							0	0
Issuance of treasury stock								0
Proceeds from exercise of equity awards							0	0
Withholding taxes for stock option exercises							0	0
Transfers (to) from related parties							(126,989)	1,579,045
Other, net							(8,038)	23,196
Net cash provided by (used in) financing activities							(536,451)	1,602,241
Effect of exchange rate changes on cash and cash equivalents							15,920	(70,026)
Net increase in cash and cash equivalents							(75,640)	(113,285)
Cash and cash equivalents at beginning of period							841,696	943,976
Cash and cash equivalents at end of period							766,056	830,691
Non-Guarantor Subsidiaries
Operating activities:
Net cash provided by operating activities							449,173	630,353
Investing activities:
Capital expenditures, including internal-use software and website development							(92,062)	(54,820)
Transfers (to) from related parties							172,731
Purchases of investments							(20,446)	(47,791)
Sales and maturities of investments							3,380	83,732
Acquisitions, net of cash acquired							(777)	(63,791)
Proceeds from sale of business, net of cash divested and disposal costs								523,882
Other, net							(2,135)	11,665
Net cash used in investing activities							60,691	452,877
Financing activities:
Payment of HomeAway Convertible Notes							0
Proceeds from issuance of long-term debt, net of issuance costs							0	0
Purchases of treasury stock							0	0
Payment of dividends to stockholders							0	0
Issuance of treasury stock								0
Proceeds from exercise of equity awards							0	1,190
Withholding taxes for stock option exercises							0	0
Transfers (to) from related parties							(250,332)	(899,345)
Other, net							(28,514)	20,722
Net cash provided by (used in) financing activities							(278,846)	(877,433)
Effect of exchange rate changes on cash and cash equivalents							12,798	(39,873)
Net increase in cash and cash equivalents							243,816	165,924
Cash and cash equivalents at beginning of period							834,603	458,724
Cash and cash equivalents at end of period							$ 1,078,419	$ 624,648