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Commitments And Contingencies (Narrative) (Detail) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Nov. 30, 2017 employee | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($)
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Number of cases brought by plaintiffs | employee | 2 |  |
Range of possible loss (up to) |  | $ 35 |
Purchase obligation over the next twelve months |  | 5,100 |
Purchase commitment period decrease |  | 800 |
Other receivables |  | 64 | $ 195
Realogy |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Other receivables |  | 26 |
Wyndham |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Other receivables |  | $ 16 |

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- Definition Amount of recorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25383-109308 + Details
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