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Interest Rate, Credit, and Market Risk Exposures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Principal value of variable rate long term debt | $ 1,732 |  |
Securitization obligations | $ 106 | $ 206 |
Realogy Brokerage Group | Geographic Concentration Risk - California |  |  |
Concentration risk, geographic area, revenue | 24.00% | 25.00% | 27.00%
Realogy Brokerage Group | Geographic Concentration Risk - New York |  |  |
Concentration risk, geographic area, revenue | 20.00% | 22.00% | 20.00%
Realogy Brokerage Group | Geographic Concentration Risk - Florida |  |  |
Concentration risk, geographic area, revenue | 11.00% | 10.00% | 9.00%
Minimum |  |  |
Fixed interest rate of swaps | 2.07% |  |
Maximum |  |  |
Fixed interest rate of swaps | 3.11% |  |
Interest rate swap contracts |  |  |
Derivative, Notional Amount | $ 1,000 |  |

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- Definition Description of risks that arise due to concentrations of revenues in a certain geographic area, either domestic or foreign. The description may address risks inherent in the geographic area, and, at a minimum, informs users of the general nature of the risk, but excludes "Information about Geographic Areas" that may be disclosed elsewhere (for instance, segment disclosures). + References No definition available. + Details
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