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Variable Interest Entities - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Variable Interest Entity [Line Items] |  |
Accrued income and other assets | $ 8,601,000,000 | $ 9,223,000,000
Accrued expense and other liabilities | 5,412,000,000 | 4,994,000,000
VIE, assets that can only be used to settle obligations | 188,281,000,000 | 189,813,000,000
VIE, liabilities | 173,644,000,000 | 176,359,000,000
Fair Value, Recurring |  |
Variable Interest Entity [Line Items] |  |
Other investments | 63,000,000 | 77,000,000
Variable Interest Entity, Not Primary Beneficiary |  |
Variable Interest Entity [Line Items] |  |
Accrued income and other assets | 2,300,000,000 | 1,900,000,000
Accrued expense and other liabilities | 1,400,000,000 | 957,000,000
VIE, assets that can only be used to settle obligations | 1,149,000,000 | 1,798,000,000
Tax credit of investment |  | 187,000,000
VIE, liabilities | 1,000,000 | 1,000,000
Variable Interest Entity, Not Primary Beneficiary | NMTC |  |
Variable Interest Entity [Line Items] |  |
VIE, assets that can only be used to settle obligations | 25,000,000 | 12,000,000
Variable Interest Entity, Not Primary Beneficiary | Other Unconsolidated Variable Interest Entities |  |
Variable Interest Entity [Line Items] |  |
Other investments | 731,000,000 |
Variable Interest Entity, Not Primary Beneficiary | Investments |  |
Variable Interest Entity [Line Items] |  |
Amortization of investment | 217,000,000 | 190,000,000
Tax credit of investment | 204,000,000 |
Other tax benefits | 52,000,000 | 45,000,000
Variable Interest Entity, Primary Beneficiary | Investments |  |
Variable Interest Entity [Line Items] |  |
VIE, liabilities | 0 | 0
Measured at NAV | Variable Interest Entity, Not Primary Beneficiary | Fair Value, Recurring | Principal investments: Indirect |  |
Variable Interest Entity [Line Items] |  |
Other investments | $ 17,000,000 | $ 34,000,000

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