Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Subtotal	$ 647	$ 563
Alternative revenue programs, net of amortization	3	1
Other accrued (deferred) revenues, net	1	0
Total retail revenues	651	564
Wholesale revenues	88	56
Other operating revenue	9	6
Total revenues	748	626
Gain on Derivative Instruments, Pretax	34	19
Residential [Member]
Disaggregation of Revenue [Line Items]
Subtotal	362	308
Commercial [Member]
Disaggregation of Revenue [Line Items]
Subtotal	197	178
Industrial [Member]
Disaggregation of Revenue [Line Items]
Subtotal	82	69
Direct Access customers [Member]
Disaggregation of Revenue [Line Items]
Subtotal	$ 6	$ 8