Stockholders' Equity - Subsidiary Purchases of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||||
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Nov. 01, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Jan. 31, 2018 |
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| Equity, Class of Treasury Stock [Line Items] | |||||
| Dividends received | $ 108 | ||||
| Tripadvisor | |||||
| Equity, Class of Treasury Stock [Line Items] | |||||
| Dividends | $ 488 | ||||
| Dividend declared per share | $ 3.50 | ||||
| Tripadvisor | 2018 Stock Repurchase Program | |||||
| Equity, Class of Treasury Stock [Line Items] | |||||
| Stock repurchase program authorized amount | $ 100 | $ 250 | |||
| Treasury shares acquired | 4,707,450 | 2,059,846 | 2,582,198 | ||
| Payment for shares repurchased | $ 115 | $ 60 | $ 100 | ||
| Stock repurchase remaining amount authorized | $ 250 | $ 75 | $ 190 | ||
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Dividends received on equity and other investments during the current period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Amount remaining of a stock repurchase plan authorized. No definition available.
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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