Investments (Tax Equity Investments - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Carrying Value of Tax Equity Investments	$ 661		$ 661		$ 714
Income Tax credits and other income tax benefits	31	$ 38	59	$ 75
Tax Equity Investments Amortization Expense	$ 34	$ 34	$ 57	$ 67