Borrowings - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 13, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
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| Line of Credit Facility [Line Items] | |||
| Vertical risk retention interest | 5.00% | ||
| Uncommitted federal funds | $ 125 | ||
| Lendable value of collateral | $ 1,400 | $ 1,600 | |
| 2023-B | |||
| Line of Credit Facility [Line Items] | |||
| Vertical risk retention interest | 5.00% | ||
| 2023-B | Private Education Loans | |||
| Line of Credit Facility [Line Items] | |||
| Private education loans sold | $ 2,000 | ||
| Additional proceeds from sale | 105 | ||
| Gain on sale | $ 7 |
| X | ||||||||||
- Definition Additional Proceeds From Sale Of Debt Securities, Available-For-Sale No definition available.
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- Definition Lendable Value Of Collateral No definition available.
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- Definition Uncommitted Federal Funds No definition available.
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- Definition Vertical Risk Retention, Percentage No definition available.
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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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