Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Aug. 04, 2022	Oct. 15, 2019	Sep. 30, 2022
Other Commitments [Line Items]
Deferred purchase agreement, borrowings by client			$ 191.0
Deferred purchase agreement, receivables with credit risk			2,000.0
Deferred purchase agreement, line of credit facility, maximum borrowing capacity			123.0
Loss contingency (up to)			10.0
Off-Balance Sheet Commitment
Other Commitments [Line Items]
Credit related commitments			$ 67.0
OneWest Litigation
Other Commitments [Line Items]
Payments for legal settlements	$ 18.5
OneWest Litigation | Servicer Incentives Received Under HAMP
Other Commitments [Line Items]
Loss contingency, damages sought, value		$ 93.0
OneWest Litigation | Aggregate Borrower, Servicer And Investor Incentives Modified Under HAMP
Other Commitments [Line Items]
Loss contingency, damages sought, value		$ 440.0