Investments (Tax Equity Investments - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Carrying Value of Tax Equity Investments	$ 688		$ 714
Income Tax credits and other income tax benefits	28	$ 37
Tax Equity Investments Amortization Expense	$ 23	$ 33