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Commitments And Contingencies (Narrative) (Detail) - USD ($) $ in Millions | Jun. 30, 2019 | Jun. 30, 2018
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Schedule Of Commitments And Contingencies [Line Items] |  |
Loss Contingency Accrual | $ 12 |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 45 |
Purchase obligation over the next twelve months | 3,100 |
Other Receivables | 214 | $ 248
Realogy [Member] |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Other Receivables | 25 |
Wyndham [Member] |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Other Receivables | $ 15 |

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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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- Definition The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 05 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=99385795&loc=d3e12631-108344 + Details
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- Definition Amount due from parties in nontrade transactions, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the recorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25383-109308 + Details
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