Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Commitments, Contingencies and Guarantees [Line Items] | ||
| Off-Balance sheet, credit loss, liability | $ 0 | |
| Commitments to Extend Credit [Member] | ||
| Commitments, Contingencies and Guarantees [Line Items] | ||
| Unused commitments to extend credit for loans | 229,800 | |
| Counterparty Settlement Guarantees Member | ||
| Commitments, Contingencies and Guarantees [Line Items] | ||
| Maximum potential counterparty exposure | 100 | |
| Contingent liabilities related to equity method investments | 0 | |
| Merchant Chargeback Guarantees [Member] | ||
| Commitments, Contingencies and Guarantees [Line Items] | ||
| Escrow deposits and settlement withholdings | $ 10 | $ 11 |