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Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues [1] $ 7,983 $ 6,221 $ 5,870
Realogy Franchise Group      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues [1] 1,249 1,059 1,158
Realogy Franchise Group | Royalties and Marketing Fees      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues 407 316 293
Realogy Brokerage Group      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues [1] 6,189 4,742 4,409
Realogy Title Group      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues [1] 952 736 596
Corporate and Other      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Net revenues [1],[2] $ (407) $ (316) $ (293)
[1] Transactions between segments are eliminated in consolidation. Revenues for Realogy Franchise Group include intercompany royalties and marketing fees paid by Realogy Brokerage Group of $407 million, $316 million and $293 million for the years ended December 31, 2021, 2020 and 2019, respectively. Such amounts are eliminated through the Corporate and Other line.
[2] Includes the elimination of transactions between segments.