XML 19 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2018
Oct. 31, 2018
Entity Information [Line Items]    
Document Period End Date Sep. 30, 2018  
Entity Registrant Name REALOGY HOLDINGS CORP.  
Entity Central Index Key 0001398987  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding   118,155,158
Realogy Group LLC [Member]    
Entity Information [Line Items]    
Entity Registrant Name REALOGY GROUP LLC  
Entity Central Index Key 0001355001  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false