Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Assets at Fair Value [Line Items]
MSR UPB	199,600.0	205,600.0
Servicing Asset at Fair Value, Amount	$ 2,665.2	$ 2,250.1	$ 1,294.8	$ 1,486.4
UPB of loans transferred	$ 37,571.1	31,864.8
NRZ
Servicing Assets at Fair Value [Line Items]
MSR UPB	10,800.0
UPB of loans transferred	$ 36,400.0
MAV
Servicing Assets at Fair Value [Line Items]
UPB of loans transferred	$ 7,400.0	$ 24,900.0
Owned Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	126,200.0	127,900.0
Servicing Asset at Fair Value, Amount	$ 1,710.6	$ 1,422.5
NRZ Transferred Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	47,300.0	53,700.0
NRZ Transferred Mortgage Servicing Rights \| NRZ
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Amount	$ 601.2	$ 558.9
MAV Transferred Mortgage Servicing Rights
Servicing Assets at Fair Value [Line Items]
MSR UPB	26,100.0	24,000.0
Servicing Asset at Fair Value, Amount	$ 353.4	$ 268.7