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Deposits and Borrowings - Long-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Instrument [Line Items] |  |
Total long-term debt | $ 47,832 | $ 42,266
Total short-term borrowings and long-term debt | 48,715 | 43,086
EUR denominated unsecured notes | 30,826 | 27,219
Euro |  |
Debt Instrument [Line Items] |  |
EUR denominated unsecured notes | $ 1,200 | 1,400
Securitized debt obligations |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 2.61% |
Carrying value | $ 16,973 | 14,994
Total senior and subordinated notes |  |
Debt Instrument [Line Items] |  |
Carrying value | $ 30,826 | 27,219
Senior notes | Total unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 3.53% |
Carrying value | $ 25,731 | 21,684
Senior notes | Fixed unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 3.43% |
Carrying value | $ 24,134 | 19,975
Senior notes | Floating unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 5.17% |
Carrying value | $ 1,597 | 1,709
Subordinated notes | Fixed unsecured subordinated debt |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 3.52% |
Carrying value | $ 5,095 | 5,535
Finance lease liabilities |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate | 4.27% |
Carrying value | $ 33 | 53
Total other long-term borrowings |  |
Debt Instrument [Line Items] |  |
Carrying value | $ 33 | $ 53
Minimum | Securitized debt obligations |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 0.32% |
Minimum | Senior notes | Fixed unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 0.80% |
Minimum | Senior notes | Floating unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 4.99% |
Minimum | Subordinated notes | Fixed unsecured subordinated debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 2.36% |
Minimum | Finance lease liabilities |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 0.30% |
Maximum | Securitized debt obligations |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 4.95% |
Maximum | Senior notes | Fixed unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 5.27% |
Maximum | Senior notes | Floating unsecured senior debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 5.65% |
Maximum | Subordinated notes | Fixed unsecured subordinated debt |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 4.20% |
Maximum | Finance lease liabilities |  |
Debt Instrument [Line Items] |  |
Stated interest rates | 9.91% |

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