Common Equity (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2023
Common Equity [Line Items]
Proceeds from issuance of common stock, net		$ 70	$ 6	$ 76	$ 13
Common stock issued during period, At-the-market offering program (in shares)				134,334
At The Market Offering Program
Common Equity [Line Items]
Proceeds from issuance of common stock, net				$ 64
Fees and commissions from issuance of common stock				$ 1
Common stock issued during period, At-the-market offering program (in shares)				1,221,775
At The Market Offering Program | Subsequent Event [Member]
Common Equity [Line Items]
Proceeds from issuance of common stock, net	$ 9
Common stock issued during period, At-the-market offering program (in shares)	172,701
At The Market Offering Program | Forecast [Member]
Common Equity [Line Items]
Maximum aggregate gross sales price of common stock that can be offered and sold						$ 225