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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
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