Revenue and Expenses, Other Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Other Expense [Abstract] | ||||
| Regulatory charges and assessments | $ 281 | $ 244 | $ 591 | $ 547 |
| Legal actions | 69 | 122 | 132 | 103 |
| Other operating losses | $ 131 | $ 177 | $ 291 | $ 329 |