Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Sep. 30, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Condensed Financial Statements, Captions [Line Items] | ||||||||||||
| Net revenues | $ 296 | $ 337 | $ 258 | $ 410 | $ 492 | $ 560 | $ 533 | $ 468 | $ 1,300 | $ 2,053 | $ 1,868 | |
| Total expenses | 275 | 266 | 452 | 354 | 389 | 469 | 471 | 418 | 1,346 | 1,746 | 1,585 | |
| Operating Income (Loss) | 21 | 71 | (194) | 56 | 103 | 91 | 62 | 50 | (46) | 307 | 283 | |
| Interest expense, net | 30 | 29 | 28 | 25 | 25 | 25 | 26 | 24 | 112 | 100 | 60 | |
| Pretax income | (9) | 42 | (222) | 31 | 78 | 66 | 36 | 26 | (158) | 207 | 223 | |
| (Benefit from)/provision for income taxes | (2) | 15 | (48) | 9 | 14 | 21 | 10 | 5 | (26) | 50 | 61 | |
| Depreciation and amortization | 24 | 24 | 25 | 25 | 28 | 26 | 27 | 29 | 98 | 109 | 99 | |
| Net (loss)/income | $ (7) | $ 27 | $ (174) | $ 22 | $ 64 | $ 45 | $ 26 | $ 21 | $ (132) | $ 157 | $ 162 | |
| Diluted (in usd per share) | $ (0.08) | $ 0.29 | $ (1.86) | $ 0.23 | $ 680,000 | $ 0.47 | $ 0.27 | $ 0.22 | $ (1.42) | $ 1.62 | $ 1.62 | |
| Weighted Average Number of Shares Outstanding, Diluted | 93.3 | 93.4 | 93.3 | 93.9 | 95.0 | 96.3 | 97.4 | 98.2 | 93.4 | 96.6 | 99.8 | |
| Stock-based compensation | $ 5 | $ 5 | $ 5 | $ 4 | $ 4 | $ 4 | $ 4 | $ 3 | $ 21 | $ 20 | ||
| Separation-related costs | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 21 | 2 | 22 | $ 77 | |
| Transaction-related item | 0 | 20 | 0 | 0 | $ 20 | 0 | 20 | |||||
| Contract termination | (1) | 34 | 9 | 0 | 0 | 42 | 0 | |||||
| Transaction Related Costs | 0 | 0 | 5 | 8 | 10 | 12 | 11 | 7 | 12 | 40 | 36 | |
| Foreign currency impact of highly inflationary countries | 0 | 1 | 0 | 0 | 1 | 3 | 0 | 1 | 2 | 5 | 3 | |
| Impairments, net | 0 | 0 | 206 | 0 | 0 | 0 | 45 | 0 | 206 | 45 | 0 | |
| Other Restructuring Costs | 5 | 0 | 16 | 13 | 8 | 0 | 0 | 0 | 34 | 8 | 0 | |
| Adjusted EBITDA | 56 | 101 | 63 | 107 | 153 | 190 | 159 | 111 | 327 | 613 | 507 | |
| Hotel Franchising | ||||||||||||
| Condensed Financial Statements, Captions [Line Items] | ||||||||||||
| Net revenues | 202 | 236 | 182 | 243 | 300 | 379 | 331 | 269 | ||||
| Adjusted EBITDA | 75 | 117 | 83 | 108 | 151 | 195 | 162 | 113 | ||||
| Hotel Management | ||||||||||||
| Condensed Financial Statements, Captions [Line Items] | ||||||||||||
| Net revenues | 94 | 101 | 76 | 167 | 190 | 180 | 201 | 197 | ||||
| Adjusted EBITDA | (1) | 2 | (4) | 17 | 21 | 13 | 16 | 16 | ||||
| Corporate and Other | ||||||||||||
| Condensed Financial Statements, Captions [Line Items] | ||||||||||||
| Net revenues | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 2 | 0 | 6 | 7 | |
| Depreciation and amortization | 10 | 11 | 6 | |||||||||
| Adjusted EBITDA | $ (18) | $ (18) | $ (16) | $ (18) | $ (19) | $ (18) | $ (19) | $ (18) | $ (69) | $ (75) | $ (55) | |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cumulative translation gain (loss), before tax, from translating foreign currency financial statements into the reporting currency. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization No definition available.
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- Definition Concessions of hotel-management fee for past services No definition available.
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- Definition Transaction Related Costs No definition available.
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