Annual report pursuant to Section 13 and 15(d)

DEBT OBLIGATIONS - Schedule of Debt Obligations (Details)

v3.20.4
DEBT OBLIGATIONS - Schedule of Debt Obligations (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Outstanding Face Amount $ 25,219,365,000  
Carrying Value $ 25,191,875,000 $ 35,636,373,000
Weighted Average Funding Cost 1.61%  
Weighted Average Life (Years) 2 years 2 months 12 days  
Interest payable $ 44,623,000 68,668,000
Repurchase Agreements | Non-Agency RMBS | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 25,200,000  
Secured Notes And Bonds Payable | Mr. Cooper    
Debt Instrument [Line Items]    
Outstanding Face Amount 5,700,000  
Secured Notes And Bonds Payable | 4.50% Agency MSR Secured Note And Bond Payable | LIBOR    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 425,100,000  
Variable interest rate spread 4.50%  
Secured Notes And Bonds Payable | 3.8% To 5.4% Public Notes    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 1,950,000,000.0  
Secured Notes And Bonds Payable | 2.9% Residential Mortgage Loans | Mr. Cooper    
Debt Instrument [Line Items]    
Collateral amount $ 1,500,000  
Secured Notes And Bonds Payable | 2.9% Residential Mortgage Loans | LIBOR | Mr. Cooper    
Debt Instrument [Line Items]    
Variable interest rate spread 2.90%  
Secured Notes And Bonds Payable | 3.2% To 5.00% Asset-Backed Notes    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 947,500,000  
Secured Notes And Bonds Payable | 3.2% To 5.00% Asset-Backed Notes | LIBOR | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 3.20%  
Secured Notes And Bonds Payable | 3.2% To 5.00% Asset-Backed Notes | LIBOR | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 5.00%  
Secured Notes And Bonds Payable | Servicer Advance Investments | LIBOR | Minimum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.20%  
Secured Notes And Bonds Payable | Servicer Advance Investments | LIBOR | Maximum    
Debt Instrument [Line Items]    
Variable interest rate spread 1.90%  
Repurchase Agreements | Warehouse Credit Facilities-Residential Mortgage Loans    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 4,043,156,000  
Carrying Value $ 4,039,564,000 5,053,207,000
Weighted Average Funding Cost 2.18%  
Weighted Average Life (Years) 7 months 6 days  
Repurchase agreements $ 258,000,000.0  
Interest rate, stated percentage 4.40%  
Repurchase Agreements | Warehouse Credit Facilities-Residential Mortgage Loans | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 19 years 6 months  
Outstanding Face $ 4,370,264,000  
Amortized Cost Basis 4,496,831,000  
Carrying Value 4,465,054,000  
Repurchase Agreements | Non-Agency RMBS | Collateral | Retained Servicer Advance and Consumer Bonds    
Debt Instrument [Line Items]    
Carrying Value 35,100,000  
Secured Financing Agreements    
Debt Instrument [Line Items]    
Outstanding Face Amount 17,552,126,000  
Carrying Value $ 17,547,680,000 27,916,225,000
Weighted Average Funding Cost 0.84%  
Weighted Average Life (Years) 3 months 18 days  
Interest payable $ 48,500,000  
Secured Financing Agreements | Agency RMBS    
Debt Instrument [Line Items]    
Outstanding Face Amount 12,682,427,000  
Carrying Value $ 12,682,427,000 15,481,677,000
Weighted Average Funding Cost 0.24%  
Weighted Average Life (Years) 2 months 12 days  
Secured Financing Agreements | Agency RMBS | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 10 months 24 days  
Outstanding Face $ 12,929,057,000  
Amortized Cost Basis 13,715,013,000  
Carrying Value 13,800,351,000  
Secured Financing Agreements | Non-Agency RMBS    
Debt Instrument [Line Items]    
Outstanding Face Amount 818,063,000  
Carrying Value $ 817,209,000 7,317,519,000
Weighted Average Funding Cost 3.48%  
Weighted Average Life (Years) 3 months 18 days  
Secured Financing Agreements | Non-Agency RMBS | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 8 months 12 days  
Outstanding Face $ 17,183,226,000  
Amortized Cost Basis 1,534,798,000  
Carrying Value 1,548,351,000  
Secured Financing Agreements | Real Estate Owned    
Debt Instrument [Line Items]    
Outstanding Face Amount 8,480,000  
Carrying Value $ 8,480,000 63,822,000
Weighted Average Funding Cost 3.13%  
Weighted Average Life (Years) 1 year 10 months 24 days  
Secured Financing Agreements | Real Estate Owned | Collateral    
Debt Instrument [Line Items]    
Carrying Value $ 11,098,000  
Secured Notes And Bonds Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount 7,667,239,000  
Carrying Value $ 7,644,195,000 7,720,148,000
Weighted Average Funding Cost 3.39%  
Weighted Average Life (Years) 6 years 6 months  
Secured Notes And Bonds Payable | Excess MSRs    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 275,088,000  
Carrying Value $ 275,088,000 217,300,000
Weighted Average Funding Cost 4.36%  
Weighted Average Life (Years) 3 years 8 months 12 days  
Secured Notes And Bonds Payable | Excess MSRs | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years 1 month 6 days  
Outstanding Face $ 101,142,417,000  
Amortized Cost Basis 317,234,000  
Carrying Value 398,969,000  
Secured Notes And Bonds Payable | MSRs(B)    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,704,923,000  
Carrying Value $ 2,691,791,000 2,640,036,000
Weighted Average Funding Cost 4.52%  
Weighted Average Life (Years) 3 years 6 months  
Secured Notes And Bonds Payable | MSRs(B) | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 5 years 7 months 6 days  
Outstanding Face $ 416,212,194,000  
Amortized Cost Basis 4,457,541,000  
Carrying Value 4,400,657,000  
Secured Notes And Bonds Payable | Servicer Advance Investments    
Debt Instrument [Line Items]    
Outstanding Face Amount 423,144,000  
Carrying Value $ 423,144,000 443,248,000
Weighted Average Funding Cost 1.45%  
Weighted Average Life (Years) 1 year 6 months  
Secured Notes And Bonds Payable | Servicer Advance Investments | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 6 years  
Outstanding Face $ 449,150,000  
Amortized Cost Basis 512,958,000  
Carrying Value 538,056,000  
Secured Notes And Bonds Payable | Servicer Advances    
Debt Instrument [Line Items]    
Outstanding Face Amount 2,593,643,000  
Carrying Value $ 2,585,575,000 2,738,424,000
Weighted Average Funding Cost 2.42%  
Weighted Average Life (Years) 1 year 9 months 18 days  
Secured Notes And Bonds Payable | Servicer Advances | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 8 months 12 days  
Outstanding Face $ 2,970,329,000  
Amortized Cost Basis 3,002,267,000  
Carrying Value 3,002,267,000  
Secured Notes And Bonds Payable | Residential Mortgage Loans    
Debt Instrument [Line Items]    
Outstanding Face Amount 1,045,275,000  
Carrying Value $ 1,039,838,000 864,451,000
Weighted Average Funding Cost 4.25%  
Weighted Average Life (Years) 30 years 2 months 12 days  
Secured Notes And Bonds Payable | Residential Mortgage Loans | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 4 years 9 months 18 days  
Outstanding Face $ 1,602,289,000  
Amortized Cost Basis 1,535,095,000  
Carrying Value 1,365,250,000  
Secured Notes And Bonds Payable | Consumer Loans    
Debt Instrument [Line Items]    
Outstanding Face Amount 625,166,000  
Carrying Value $ 628,759,000 $ 816,689,000
Weighted Average Funding Cost 2.03%  
Weighted Average Life (Years) 3 years 7 months 6 days  
Secured Notes And Bonds Payable | Consumer Loans | Collateral    
Debt Instrument [Line Items]    
Weighted Average Life (Years) 3 years 7 months 6 days  
Outstanding Face $ 618,055,000  
Amortized Cost Basis 682,866,000  
Carrying Value 682,866,000  
Secured Notes And Bonds Payable | 4.40% Secured Corporate Note    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 275,100,000  
Secured Notes And Bonds Payable | 4.40% Secured Corporate Note | LIBOR    
Debt Instrument [Line Items]    
Variable interest rate spread 4.40%  
Secured Notes And Bonds Payable | 4.50% Agency MSR Secured Note And Bond Payable    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 329,900,000  
Secured Notes And Bonds Payable | 3.8% To 5.4% Public Notes | Minimum    
Debt Instrument [Line Items]    
Outstanding Face Amount 0.038  
Secured Notes And Bonds Payable | 3.8% To 5.4% Public Notes | Maximum    
Debt Instrument [Line Items]    
Outstanding Face Amount 0.054  
Secured Notes And Bonds Payable | 6.6% Asset-Backed Notes    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 150,900,000  
Interest rate, stated percentage 6.60%  
Secured Notes And Bonds Payable | 3.7% Asset-Backed Notes    
Debt Instrument [Line Items]    
Outstanding Face Amount $ 58,300,000  
Secured Notes And Bonds Payable | 3.7% Asset-Backed Notes | Maximum    
Debt Instrument [Line Items]    
Weighted Average Funding Cost 3.70%  
Secured Notes And Bonds Payable | Servicer Advance Investments    
Debt Instrument [Line Items]    
Face amount of fixed rate debt $ 2,000,000,000.0  
Secured Notes And Bonds Payable | Consumer Loan, UPB Class A    
Debt Instrument [Line Items]    
Interest rate, stated percentage 2.00%  
UPB of Underlying Mortgages $ 572,100,000  
Secured Notes And Bonds Payable | Consumer Loan, UPB Class B    
Debt Instrument [Line Items]    
Interest rate, stated percentage 2.70%  
UPB of Underlying Mortgages $ 53,000,000.0