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Derivative Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Feb. 28, 2023 USD ($) derivative_held | Aug. 31, 2022 USD ($) derivative_held | Apr. 30, 2022 derivative_held | Apr. 30, 2021 USD ($) derivative_held
Derivative [Line Items] |  |  |  |  |  |
Asset at fair value, changes in fair value resulting from changes in assumptions | $ 22 |  |  |  |  |
Interest rate cap instruments | Not Designated as Hedging Instrument |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of interest-rate contracts held | derivative_held |  |  |  |  |  | 2
Derivative amount terminated |  |  |  |  |  | $ 142
Increase in the fair value of the interest rate cap agreements |  | $ 2 |  |  |  |
Interest rate swap instruments | SOFR |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of interest-rate contracts held | derivative_held |  |  | 2 |  |  |
Notional amount |  |  | $ 142 |  |  |
Interest rate swap instruments | Designated as Hedging Instrument |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of interest-rate contracts held | derivative_held |  |  |  | 2 |  |
Derivative amount terminated |  |  |  | $ 500 |  |
Interest rate swap instruments | Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of interest-rate contracts held | derivative_held |  |  |  |  | 2 |

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- Definition Amount of increase (decrease) in fair value from changes in the assumptions or model used to calculate the fair value of a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References No definition available. + Details
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