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Note 2. Summary of Significant Accounting Policies Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Equity Method Investments $ (51) $ (74)  
Proceeds from investments in unconsolidated entities 19 11 $ 0
Income (Loss) from Equity Method Investments 4 (18) (12)
Proceeds from Equity Method Investment, Distribution 3 63 11
Payments to Acquire Equity Method Investments 15 55 0
Company Owned Real Estate Brokerage Services | Gain from sale of PHHHL assets by Guaranteed Rate Affinity      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investments   (35)  
Company Owned Real Estate Brokerage Services | Exit Costs related to PHHHL      
Schedule of Equity Method Investments [Line Items]      
Income (Loss) from Equity Method Investments   7  
Company Owned Real Estate Brokerage Services | PHH Home Loans      
Schedule of Equity Method Investments [Line Items]      
Income (Loss) from Equity Method Investments   (6)  
Title and Settlement Services      
Schedule of Equity Method Investments [Line Items]      
Income (Loss) from Equity Method Investments   (4)  
Title and Settlement Services | Amortization of Intangible Assets related to GRA Acquisition      
Schedule of Equity Method Investments [Line Items]      
Income (Loss) from Equity Method Investments $ 2 (3)  
PHH Home Loans      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Ownership Percentage 49.90%    
Equity Method Investments $ 0 (19)  
PHH Home Loans | Company Owned Real Estate Brokerage Services      
Schedule of Equity Method Investments [Line Items]      
Income (Loss) from Equity Method Investments   (22) $ (8)
Guaranteed Rate Affinity      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Ownership Percentage 49.90%    
Equity Method Investment, Unowned Percentage 50.10%    
Equity Method Investments $ (43) (48)  
Payments to Acquire Equity Method Investments $ 4 $ 55