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v3.24.0.1

Commitments, Contingencies and Guarantees - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 12, 2023 USD ($) | Jan. 31, 2022 USD ($) StateAttorneysGeneral Borrower | Mar. 31, 2023 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Accrued probable incurred loss |  |  |  |  | $ 73,000,000
Number of State Attorneys General under Agreement | StateAttorneysGeneral |  | 40 |  |  |
Additional private loan provision for loan losses |  |  | $ 23,000,000 |  |
Aggregate cash fund contribution | $ 44,000,000 |  |  |  |
Net impact to operating expense |  |  | $ 0 |  |
Number of borrowers involved in cancellation of loan balance | Borrower |  | 66,000 |  |  |
Aggregate outstanding balance of loans cancelled |  | $ 1,700,000,000 |  |  |
Expense on cancellation of loans |  | 50,000,000 |  |  |
One-time payment |  | $ 145,000,000 |  |  |
Regulatory expenses |  |  |  | $ 205,000,000 |
Minimum [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued probable incurred loss |  |  |  |  | 0
Maximum [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued probable incurred loss |  |  |  |  | 250,000,000
SLM BankCo [Member] | Indemnification Matters [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued liabilities related to indemnification matters |  |  |  |  | $ 0

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