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Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020 | Jan. 01, 2020
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Royalty Rate |  | 600.00% |  |  |
Deferred Revenue |  | $ 93 |  |  | $ 82
Deferred Revenue, Revenue Recognized |  | 172 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 183 |  |  |
Recognized as Revenue during the period |  | (172) |  |  |
Ending Balance at December 31, 2021 |  | 93 |  |  |
Realogy Franchise Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue | [1] | 79 |  |  | 70
Deferred Revenue, Revenue Recognized | [1] | 169 |  |  |
Deferred Sales Commission |  | 26 |  | $ 25 |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period | [1] | 178 |  |  |
Recognized as Revenue during the period | [1] | (169) |  |  |
Ending Balance at December 31, 2021 | [1] | 79 |  |  |
Realogy Franchise Group | Brand Marketing Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 25 | $ 14 |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Ending Balance at December 31, 2021 |  | 25 |  |  |
Realogy Franchise Group | Area Development Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 41 | 43 |  |
Deferred Revenue, Revenue Recognized |  | 5 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 3 |  |  |
Recognized as Revenue during the period |  | (5) |  |  |
Ending Balance at December 31, 2021 |  | 41 |  |  |
Realogy Franchise Group | Network Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 0 | 0 |  |
Deferred Revenue, Revenue Recognized |  | 5 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 5 |  |  |
Recognized as Revenue during the period |  | (5) |  |  |
Ending Balance at December 31, 2021 |  | 0 |  |  |
Realogy Franchise Group | Outsourcing Management Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 4 | 3 |  |
Deferred Revenue, Revenue Recognized |  | 40 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 41 |  |  |
Recognized as Revenue during the period |  | (40) |  |  |
Ending Balance at December 31, 2021 |  | $ 4 |  |  |
Realogy Franchise Group | International Franchise Rights |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Amortization period |  | 25 years |  |  |
Realogy Franchise Group | Franchise Rights |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Amortization period |  | 30 years |  |  |
Realogy Brokerage Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | $ 14 |  |  | $ 12
Deferred Revenue, Revenue Recognized |  | 3 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 5 |  |  |
Recognized as Revenue during the period |  | (3) |  |  |
Ending Balance at December 31, 2021 |  | 14 |  |  |
Realogy Brokerage Group | New Development Business |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 11 | $ 9 |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 2 |  |  |
Ending Balance at December 31, 2021 |  | $ 11 |  |  |
Realogy Brokerage Group | Minimum |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
New Development Period |  | 18 months |  |  |
Realogy Brokerage Group | Maximum |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
New Development Period |  | 24 months |  |  |
[1] | Revenues recognized include intercompany marketing fees paid by Realogy Brokerage Group.

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