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Transactions With Former Parent Transfer of Cendant Corporate Liabilities and Issuance of Guarantees to Cendant and Affiliates (Details)
$ in Millions
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jul. 31, 2006
Independent_Companies
Related Party Transactions [Abstract]      
Cendant Spin-off Number of New Independent Companies     4
Number of New Independent Companies per Cendant Business Unit     1
Guaranty Arrangement Percentage of Obligations Assumed by Realogy 62.50%    
Due to former parent | $ $ 17 $ 28