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Cover Page and DEI
Apr. 20, 2020
Nov. 07, 2019
Entity Information [Line Items]    
Document Type 8-K  
Document Period End Date Apr. 20, 2020  
Entity Registrant Name Realogy Holdings Corp.  
Entity Incorporation, State or Country Code   DE
Entity File Number   001-35674
Entity Tax Identification Number   20-8050955
Entity Address, Address Line One 175 Park Avenue  
Entity Address, City or Town Madison  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07940  
City Area Code 973  
Local Phone Number 407-2000  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol RLGY  
Security Exchange Name NYSE  
Entity Emerging Growth Company false  
Amendment Flag   false
Entity Central Index Key   0001398987
Realogy Group LLC [Member]    
Entity Information [Line Items]    
Entity Registrant Name Realogy Group LLC  
Entity Incorporation, State or Country Code DE  
Entity File Number 333-148153  
Entity Tax Identification Number 20-4381990  
Entity Central Index Key   0001355001