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Business Description (Details) | Nov. 07, 2019 USD ($) | Dec. 31, 2019 employees | Dec. 31, 2019 Countries | Dec. 31, 2019 franchisedandcompanyownedoffices | Dec. 31, 2019 Brokerage_Offices | Dec. 31, 2018 franchisedandcompanyownedoffices | Dec. 31, 2017 franchisedandcompanyownedoffices | Dec. 31, 2016 franchisedandcompanyownedoffices
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Expected value to be received at closing from the planned sale of employee relocation business | $ | $ 400 |  |  |  |  |  |  |
Expected cash proceeds at closing from the planned sale of employee relocation business | $ | 375 |  |  |  |  |  |  |
Expected deferred payment at closing from the planned sale of employee relocation business | $ | $ 25 |  |  |  |  |  |  |
Number of Countries in which Entity Operates | Countries |  |  | 114 |  |  |  |  |
Realogy Brokerage Group |  |  |  |  |  |  |  |
Number of Independent Sales Associates | employees |  | 52,200 |  |  |  |  |  |
Number of offices |  |  |  | 713 | 710 | 755 | 789 | 789
Worldwide | Realogy Franchise and Brokerage Groups |  |  |  |  |  |  |  |
Number of Independent Sales Associates | employees |  | 302,400 |  |  |  |  |  |
Number of offices | franchisedandcompanyownedoffices |  |  |  | 18,500 |  |  |  |
United States | Realogy Franchise and Brokerage Groups |  |  |  |  |  |  |  |
Number of Independent Sales Associates | employees |  | 189,900 |  |  |  |  |  |
Number of offices | Brokerage_Offices |  |  |  |  | 5,900 |  |  |

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