Derivative And Credit-Related Financial Instruments (Schedule Of Financial Instruments With Off-Balance Sheet Credit Risk) (Details) - Maximum - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Unused Commitments to Extend Credit | ||
| Credit Related Financial Instrument [Line Items] | ||
| Loss contingency, estimate of possible loss | $ 28,113 | $ 28,397 |
| Commercial and other | Unused Commitments to Extend Credit | ||
| Credit Related Financial Instrument [Line Items] | ||
| Loss contingency, estimate of possible loss | 23,996 | 24,342 |
| Bankcard, revolving credit and home equity loan commitments | Unused Commitments to Extend Credit | ||
| Credit Related Financial Instrument [Line Items] | ||
| Loss contingency, estimate of possible loss | 4,117 | 4,055 |
| Standby letters of credit | ||
| Credit Related Financial Instrument [Line Items] | ||
| Loss contingency, estimate of possible loss | 4,156 | 4,138 |
| Commercial letters of credit | ||
| Credit Related Financial Instrument [Line Items] | ||
| Loss contingency, estimate of possible loss | $ 10 | $ 12 |