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Investments, Equity Method and Joint Ventures (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | $ 205 |  | $ 131
Equity in losses (earnings) of unconsolidated entities | 10 | $ (31) |
Dividends received from unconsolidated entities | 1 | 31 |
Payments to Acquire Equity Method Investments | 7 | 6 |
Realogy Title Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | 172 |  | 102
Guaranteed Rate Affinity | Realogy Title Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | $ 86 |  | 94
Equity Method Investment, Ownership Percentage | 49.90% |  |
Equity in losses (earnings) of unconsolidated entities | $ 8 | (30) |
Dividends received from unconsolidated entities | 0 | 30 |
Title Insurance Underwriter Joint Venture | Realogy Title Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | $ 78 |  | 0
Equity Method Investment, Ownership Percentage | 30.00% |  |
Dividends received from unconsolidated entities | $ 12 |  |
Noncash or Part Noncash Acquisition, Investments Acquired | 90 |  |
Other Realogy Title Group's Equity Method Investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity in losses (earnings) of unconsolidated entities | (1) |  |
Other Realogy Title Group's Equity Method Investments | Realogy Title Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | 8 |  | 8
Equity in losses (earnings) of unconsolidated entities |  | (1) |
Dividends received from unconsolidated entities | 1 | 1 |
Realogy Brokerage Group's Equity Method Investments | Realogy Brokerage Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value of equity method investments | 33 |  | $ 29
Equity in losses (earnings) of unconsolidated entities | 3 | 0 |
Payments to Acquire Equity Method Investments | $ 7 | $ 3 |
RealSure Joint Venture | Realogy Brokerage Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 49.00% |  |
Real Estate Auction Joint Venture | Realogy Brokerage Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |

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- Definition Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21D -URI https://asc.fasb.org/extlink&oid=126954810&loc=SL94080555-108585 + Details
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