Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENT - Narrative (Details)

v3.20.4
FAIR VALUE MEASUREMENT - Narrative (Details)
$ in Millions
12 Months Ended
Apr. 10, 2020
USD ($)
Sep. 05, 2019
earnout_payment
Sep. 03, 2019
USD ($)
Jul. 03, 2018
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Schedule of Equity Method Investments [Line Items]            
Percentage of instruments with ranges of assumptions used available         99.00%  
Minimum            
Schedule of Equity Method Investments [Line Items]            
Recapture rate, term (in months)         3 months  
Broker price discount         10.00%  
Maximum            
Schedule of Equity Method Investments [Line Items]            
Recapture rate, term (in months)         6 months  
Broker price discount         25.00%  
Real Estate Owned            
Schedule of Equity Method Investments [Line Items]            
Assets, fair value adjustment         $ (2.7) $ 0.6
Residential Mortgage Loans            
Schedule of Equity Method Investments [Line Items]            
Assets, fair value adjustment         $ (113.0)  
Residential Mortgage Loans, Held-For-Sale, At Lower Cost Or Fair Value            
Schedule of Equity Method Investments [Line Items]            
Assets, fair value adjustment           $ 20.0
Maturity Greater than 30 Days            
Schedule of Equity Method Investments [Line Items]            
Days delinquent (in days)         30 days  
Mortgage Servicing Rights Financing Receivable | Minimum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.40%  
Mortgage Servicing Rights Financing Receivable | Maximum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         9.50%  
Mortgage Servicing Rights Financing Receivable | Weighted Average            
Schedule of Equity Method Investments [Line Items]            
Discount rate         9.40% 8.90%
MSRs | Minimum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.30%  
MSRs | Maximum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         13.00%  
MSRs | Weighted Average            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.70% 7.80%
MSRs | Excess MSRs Investees            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.80% 7.80%
MSRs | Excess MSRs Investees | Minimum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.50%  
MSRs | Excess MSRs Investees | Maximum            
Schedule of Equity Method Investments [Line Items]            
Discount rate         8.00%  
MSRs | Excess MSRs Investees | Weighted Average            
Schedule of Equity Method Investments [Line Items]            
Discount rate         7.80% 7.80%
Nonrecurring            
Schedule of Equity Method Investments [Line Items]            
Assets measured at fair value on a nonrecurring basis         $ 532.1 $ 1,242.2
Nonrecurring | Residential Mortgage Loans Held-for-sale Carried At Lower Cost Or Market            
Schedule of Equity Method Investments [Line Items]            
Assets measured at fair value on a nonrecurring basis         504.0 1,189.5
Nonrecurring | Real Estate Owned            
Schedule of Equity Method Investments [Line Items]            
Assets measured at fair value on a nonrecurring basis         $ 28.1 $ 52.7
LIBOR | Mortgage Servicing Rights Financing Receivable            
Schedule of Equity Method Investments [Line Items]            
Variable interest rate spread         2.10%  
Shellpoint Acquisition            
Schedule of Equity Method Investments [Line Items]            
Contingent consideration, high       $ 60.0    
Cash consideration       212.3    
Guardian Acquisition            
Schedule of Equity Method Investments [Line Items]            
Earnout payment payments | earnout_payment   4        
Contingent consideration, high     $ 17.5      
Cash consideration     7.6      
Contingent consideration, discount rate   9.00%        
NRM Acquisition LLC | Shellpoint Acquisition            
Schedule of Equity Method Investments [Line Items]            
Contingent consideration, high       60.0    
Cash consideration       $ 212.3    
NRZ Guardian Purchaser LLC | Guardian Acquisition            
Schedule of Equity Method Investments [Line Items]            
Contingent consideration, high     17.5      
Cash consideration $ 1.9   $ 7.6