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Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Accrued interest receivable | $ 1,933 | $ 1,881
Benefit and insurance-related investments | 450 | 462
Income tax asset, net | 145 | 369
Derivatives at fair value | 56 | 218
Accounts receivable | 91 | 159
Fixed assets | 77 | 95
Other | 35 | 39
Total | $ 2,787 | $ 3,223

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