Investments (Tax Equity Investments - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Carrying Value of Tax Equity Investments	$ 787	$ 787	$ 1,000
Income Tax credits and other income tax benefits	38	75
Tax Equity Investments Amortization Expense	$ 34	$ 67