Premises and Equipment (Schedule of Premises and Equipment) (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | $ 4,156 | $ 4,207 |
| Accumulated depreciation and amortization | (2,497) | (2,534) |
| Premises and equipment, net | 1,659 | 1,673 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | 409 | 409 |
| Premises and improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | 1,603 | 1,568 |
| Furniture and equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | 977 | 1,122 |
| Software | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | 494 | 378 |
| Leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | 465 | 457 |
| Construction in progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, gross | $ 208 | $ 273 |