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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Loan reserves | $ 237 | $ 297
Accrued expenses not currently deductible | 39 | 33
Education loan premiums and discounts, net | 32 | 41
Operating loss and credit carryovers | 11 | 12
Stock-based compensation plans | 5 | 5
Other | 18 | 19
Total deferred tax assets | 342 | 407
Deferred tax liabilities: |  |
Market value adjustments on education loans, investments and derivatives | 114 | 201
Acquired intangible assets | 23 | 22
Original issue discount on borrowings | 13 | 13
Other | 7 | 11
Total deferred tax liabilities | 157 | 247
Net deferred tax assets | $ 185 | $ 160

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