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Cover Page and DEI
Mar. 18, 2021
Nov. 07, 2019
Entity Information [Line Items]    
Document Type   8-K
Document Period End Date Mar. 18, 2021  
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