Investments (Tax Equity Investments - Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | |||||
| Carrying Value of Tax Equity Investments | $ 1,100 | $ 1,100 | $ 676 | ||
| Income Tax credits and other income tax benefits | 31 | $ 31 | 57 | $ 59 | |
| Tax Equity Investments Amortization Expense | $ 27 | $ 34 | $ 49 | $ 57 | |