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Guarantor and Non-Guarantor Supplemental Financial Information - Schedule of Cash Flow Statement Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating activities: |  |  |
Net cash provided by operating activities | $ 1,799,154,000 | $ 1,564,334,000 | $ 1,368,045,000
Investing activities: |  |  |
Capital expenditures, including internal-use software and website development | (710,330,000) | (749,348,000) | (787,041,000)
Purchases of investments | (1,811,355,000) | (45,352,000) | (521,329,000)
Sales and maturities of investments | 1,096,404,000 | 60,935,000 | 410,923,000
Acquisitions, net of cash acquired | (170,639,000) | (777,000) | (2,063,649,000)
Transfers (to) from related parties | 0 | 0 | 0
Proceeds from sale of business, net of cash divested and disposal costs | 0 | 67,088,000 | 523,882,000
Other Investing Activities Net | 13,530,000 | (50,867,000) | 65,954,000
Net cash used in investing activities | (1,582,390,000) | (718,321,000) | (2,371,260,000)
Financing activities: |  |  |
Proceeds from issuance of long-term debt, net of issuance costs | 989,600,000 | (2,093,000) | 1,441,860,000
Payment of HomeAway Convertible Notes | 0 | (401,424,000) | 0
Purchases of treasury stock | (312,089,000) | (455,746,000) | (60,546,000)
Proceeds from issuance of treasury stock | 0 | 0 | 22,575,000
Payment of dividends to stockholders | (175,775,000) | (150,159,000) | (108,527,000)
Proceeds from exercise of equity awards and employee stock purchase plan | 229,081,000 | 141,043,000 | 97,716,000
Withholding taxes for stock option exercises | (9,063,000) | (1,282,000) | (85,033,000)
Changes in controlled subsidiaries, net | (18,137,000) | 208,016,000 | (8,518,000)
Transfers (to) from related parties | 0 | 0 | 0
Other, net | (16,103,000) | (28,974,000) | 104,672,000
Net cash provided by (used in) financing activities | 687,514,000 | (690,619,000) | 1,404,199,000
Effect of exchange rate changes on cash and cash equivalents | 145,640,000 | (34,882,000) | (127,385,000)
Net increase in cash and cash equivalents | 1,049,918,000 | 120,512,000 | 273,599,000
Cash and cash equivalents at beginning of year | 1,796,811,000 | 1,676,299,000 | 1,402,700,000
Cash and cash equivalents at end of year | 2,846,729,000 | 1,796,811,000 | 1,676,299,000
Reportable Legal Entities | Parent |  |  |
Operating activities: |  |  |
Net cash provided by operating activities | 0 | 0 | 0
Investing activities: |  |  |
Capital expenditures, including internal-use software and website development | 0 | 0 | 0
Purchases of investments | 0 | 0 | 0
Sales and maturities of investments | 0 | 0 | 0
Acquisitions, net of cash acquired | 0 | 0 | (126,779,000)
Transfers (to) from related parties | 0 | 0 | 126,779,000
Proceeds from sale of business, net of cash divested and disposal costs |  | 0 | 0
Other Investing Activities Net | 0 | 0 | 0
Net cash used in investing activities | 0 | 0 | 0
Financing activities: |  |  |
Proceeds from issuance of long-term debt, net of issuance costs | 989,600,000 | (2,093,000) | 1,441,860,000
Payment of HomeAway Convertible Notes |  | 0 |
Purchases of treasury stock | (312,089,000) | (455,746,000) | (60,546,000)
Proceeds from issuance of treasury stock |  |  | 22,575,000
Payment of dividends to stockholders | (175,775,000) | (150,159,000) | (108,527,000)
Proceeds from exercise of equity awards and employee stock purchase plan | 228,187,000 | 141,043,000 | 96,526,000
Withholding taxes for stock option exercises | (5,398,000) | (1,282,000) | (85,033,000)
Changes in controlled subsidiaries, net | 0 | 0 | 0
Transfers (to) from related parties | (724,525,000) | 468,511,000 | (1,396,210,000)
Other, net | 0 | (274,000) | 89,355,000
Net cash provided by (used in) financing activities | 0 | 0 | 0
Effect of exchange rate changes on cash and cash equivalents | 0 | 0 | 0
Net increase in cash and cash equivalents | 0 | 0 | 0
Cash and cash equivalents at beginning of year | 0 | 0 | 0
Cash and cash equivalents at end of year | 0 | 0 | 0
Reportable Legal Entities | Guarantor Subsidiaries |  |  |
Operating activities: |  |  |
Net cash provided by operating activities | 1,310,451,000 | 940,191,000 | 624,327,000
Investing activities: |  |  |
Capital expenditures, including internal-use software and website development | (546,679,000) | (635,534,000) | (709,679,000)
Purchases of investments | (1,221,821,000) | 0 | (473,538,000)
Sales and maturities of investments | 875,497,000 | 37,830,000 | 327,191,000
Acquisitions, net of cash acquired | (169,836,000) | 0 | (1,873,079,000)
Transfers (to) from related parties | (5,031,000) | (172,731,000) | (303,846,000)
Proceeds from sale of business, net of cash divested and disposal costs |  | 0 | 0
Other Investing Activities Net | 6,657,000 | (50,029,000) | 54,226,000
Net cash used in investing activities | (1,061,213,000) | (820,464,000) | (2,978,725,000)
Financing activities: |  |  |
Proceeds from issuance of long-term debt, net of issuance costs | 0 | 0 | 0
Payment of HomeAway Convertible Notes |  | (401,424,000) |
Purchases of treasury stock | 0 | 0 | 0
Proceeds from issuance of treasury stock |  |  | 0
Payment of dividends to stockholders | 0 | 0 | 0
Proceeds from exercise of equity awards and employee stock purchase plan | 0 | 0 | 0
Withholding taxes for stock option exercises | 0 | 0 | 0
Changes in controlled subsidiaries, net | 0 | 0 | 0
Transfers (to) from related parties | 605,047,000 | (118,179,000) | 2,350,385,000
Other, net | (14,909,000) | (1,484,000) | (11,998,000)
Net cash provided by (used in) financing activities | 590,138,000 | (521,087,000) | 2,338,387,000
Effect of exchange rate changes on cash and cash equivalents | 36,052,000 | (14,865,000) | (86,269,000)
Net increase in cash and cash equivalents | 875,428,000 | (416,225,000) | (102,280,000)
Cash and cash equivalents at beginning of year | 425,471,000 | 841,696,000 | 943,976,000
Cash and cash equivalents at end of year | 1,300,899,000 | 425,471,000 | 841,696,000
Reportable Legal Entities | Non-Guarantor Subsidiaries(1) |  |  |
Operating activities: |  |  |
Net cash provided by operating activities | 488,703,000 | 624,143,000 | 743,718,000
Investing activities: |  |  |
Capital expenditures, including internal-use software and website development | (163,651,000) | (113,814,000) | (77,362,000)
Purchases of investments | (589,534,000) | (45,352,000) | (47,791,000)
Sales and maturities of investments | 220,907,000 | 23,105,000 | 83,732,000
Acquisitions, net of cash acquired | (803,000) | (777,000) | (63,791,000)
Transfers (to) from related parties | 5,031,000 | 172,731,000 | 177,067,000
Proceeds from sale of business, net of cash divested and disposal costs |  | 67,088,000 | 523,882,000
Other Investing Activities Net | 6,873,000 | (838,000) | 11,728,000
Net cash used in investing activities | (521,177,000) | 102,143,000 | 607,465,000
Financing activities: |  |  |
Proceeds from issuance of long-term debt, net of issuance costs | 0 | 0 | 0
Payment of HomeAway Convertible Notes |  | 0 |
Purchases of treasury stock | 0 | 0 | 0
Proceeds from issuance of treasury stock |  |  | 0
Payment of dividends to stockholders | 0 | 0 | 0
Proceeds from exercise of equity awards and employee stock purchase plan | 894,000 | 0 | 1,190,000
Withholding taxes for stock option exercises | (3,665,000) | 0 | 0
Changes in controlled subsidiaries, net | (18,137,000) | 208,016,000 | (8,518,000)
Transfers (to) from related parties | 119,478,000 | (350,332,000) | (954,175,000)
Other, net | (1,194,000) | (27,216,000) | 27,315,000
Net cash provided by (used in) financing activities | 97,376,000 | (169,532,000) | (934,188,000)
Effect of exchange rate changes on cash and cash equivalents | 109,588,000 | (20,017,000) | (41,116,000)
Net increase in cash and cash equivalents | 174,490,000 | 536,737,000 | 375,879,000
Cash and cash equivalents at beginning of year | 1,371,340,000 | 834,603,000 | 458,724,000
Cash and cash equivalents at end of year | $ 1,545,830,000 | $ 1,371,340,000 | $ 834,603,000

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