Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Subtotal	$ 569	$ 500	$ 1,216	$ 1,063
Alternative revenue programs, net of amortization	2	3	5	4
Other Cost of Operating Revenue	(4)
Other accrued (deferred) revenues, net		0	(3)	0
Total retail revenues	567	503	1,218	1,067
Wholesale revenues	62	65	150	121
Other operating revenue	19	23	28	29
Total revenues	648	591	1,396	1,217
Gain on Derivative Instruments, Pretax	22	14	56	33
Residential [Member]
Disaggregation of Revenue [Line Items]
Subtotal	279	250	641	558
Commercial [Member]
Disaggregation of Revenue [Line Items]
Subtotal	196	168	393	346
Industrial [Member]
Disaggregation of Revenue [Line Items]
Subtotal	87	73	169	142
Direct Access customers [Member]
Disaggregation of Revenue [Line Items]
Subtotal	$ 7	$ 9	$ 13	$ 17