Investments (Tax Equity Investments - Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Carrying Value of Tax Equity Investments | $ 935 | $ 676 | |
| Income Tax Credits And Other Income Tax Benefits | 25 | $ 28 | |
| Tax Equity Investments Amortization Expense | $ 22 | $ 23 | |