Common Equity (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023
Common Equity [Line Items]
Proceeds from issuance of common stock, net	$ 125	$ 6	$ 201	$ 19
At The Market Offering Program [Member]
Common Equity [Line Items]
Common stock issued during period, At-the-market offering program (in shares)			3,569,937
Proceeds from issuance of common stock, net			$ 183
Fees and commissions from issuance of common stock			$ 2
At The Market Offering Program [Member] | Forecast [Member]
Common Equity [Line Items]
Maximum aggregate gross sales price of common stock that can be offered and sold					$ 225