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Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Royalty Rate |  | 600.00% |  |  |
Deferred Revenue |  | $ 85 | $ 85 | $ 92 |
Deferred Revenue, Revenue Recognized |  | 146 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 139 |  |  |
Recognized as Revenue during the period |  | (146) |  |  |
Ending Balance at December 31, 2019 |  | 85 |  |  |
Realogy Franchise Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue | [1] | 69 | 69 | 78 |
Deferred Revenue, Revenue Recognized | [1] | 127 |  |  |
Deferred Sales Commission |  |  | 24 |  | $ 25
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period | [1] | 118 |  |  |
Recognized as Revenue during the period | [1] | (127) |  |  |
Ending Balance at December 31, 2019 | [1] | 69 |  |  |
Realogy Franchise Group | Brand Marketing Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 13 | 13 | 12 |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Ending Balance at December 31, 2019 |  | 13 |  |  |
Realogy Franchise Group | Area Development Fees |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 48 | 48 | 54 |
Deferred Revenue, Revenue Recognized |  | 8 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 2 |  |  |
Recognized as Revenue during the period |  | (8) |  |  |
Ending Balance at December 31, 2019 |  | 48 |  |  |
Realogy Brokerage Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 13 | 13 | 14 |
Deferred Revenue, Revenue Recognized |  | 9 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 8 |  |  |
Recognized as Revenue during the period |  | (9) |  |  |
Ending Balance at December 31, 2019 |  | 13 |  |  |
Realogy Brokerage Group | New Development Business |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 9 | 9 | 10 |
Deferred Revenue, Revenue Recognized |  | 2 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 1 |  |  |
Recognized as Revenue during the period |  | (2) |  |  |
Ending Balance at December 31, 2019 |  | 9 |  |  |
Realogy Leads Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Deferred Revenue |  | 3 | $ 3 | $ 0 |
Deferred Revenue, Revenue Recognized |  | 10 |  |  |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |
Additions during the period |  | 13 |  |  |
Recognized as Revenue during the period |  | (10) |  |  |
Ending Balance at December 31, 2019 |  | $ 3 |  |  |
Minimum | Realogy Brokerage Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
New Development Period |  | 18 months |  |  |
Maximum | Realogy Brokerage Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
New Development Period |  | 24 months |  |  |
International Franchise Rights | Realogy Franchise Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Amortization period |  | 25 years |  |  |
Franchise Rights | Realogy Franchise Group |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Amortization period |  | 30 years |  |  |
[1] | Revenues recognized include intercompany marketing fees paid by Realogy Brokerage Group.The majority of the Company's contracts are transactional in nature or have a duration of one-year or less. Accordingly, the Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

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