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Commitments And Contingencies (Detail) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) classAction employee | Jun. 30, 2023 subsidiary employee vehicle | Mar. 31, 2023 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |  |
Loss contingency, liability assumed, percent |  |  | 37.50% |  |
Number of class action | classAction | 2 |  |  |  |
Number of class action seeking damages in connection with breach of contract | employee | 1 |  |  |  |
Number of subsidiaries names as a defendant | subsidiary |  | 2 |  |  |
Number of employees involved in an accident | employee |  | 1 |  |  |
Number of vehicles involved in an accident | vehicle |  | 1 |  |  |
Range of possible loss (up to) | $ 40 |  |  |  |
Purchase obligation over the next twelve months | $ 6,800 |  |  |  |
Long-term purchase commitment, period | 12 months |  |  |  |
Aggregate purchase obligations | $ 149 |  |  |  |
Receivables due from former subsidiaries | 237 |  |  | $ 212 | $ 134
Liabilities accrued for asset retirement obligations | 27 |  |  | $ 26 |
Realogy |  |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |  |
Receivables due from former subsidiaries | 38 |  |  |  |
Wyndham |  |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |  |
Receivables due from former subsidiaries | $ 23 |  |  |  |
Tax Liability | Wyndham |  |  |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |  |
Loss contingency, liability assumed, percent |  |  | 62.50% |  |

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