Statements of Operations (Unaudited) - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating revenue:
Total operating revenue	$ 6,346	$ 6,030
Operating expenses:
Cost of sales	1,955	1,460
Total operating expenses	5,679	4,794
Operating income	667	1,236
Other income (expense):
Interest expense	(586)	(532)
Allowance for equity funds	49	38
Other, net	40	5
Total other income (expense)	312	(1,706)
Income (loss) before income tax expense (benefit) and equity income (loss)	979	(470)
Income tax expense (benefit)	(162)	(507)
Net income (loss) attributable to parent	989	(129)
MEC
Operating revenue:
Total operating revenue	920	1,005
Operating expenses:
Operations and maintenance	205	192
Depreciation and amortization	234	250
Property and other taxes	42	40
Total operating expenses	832	905
Operating income	88	100
Other income (expense):
Interest expense	(80)	(78)
Allowance for borrowed funds	4	4
Allowance for equity funds	11	15
Other, net	16	(3)
Total other income (expense)	(49)	(62)
Income (loss) before income tax expense (benefit) and equity income (loss)	39	38
Income tax expense (benefit)	(203)	(206)
Net income (loss) attributable to parent	242	244
Regulated electric | MEC
Operating revenue:
Total operating revenue	591	608
Operating expenses:
Cost of sales	115	125
Regulated natural gas and other | MEC
Operating revenue:
Total operating revenue	329	397
Operating expenses:
Cost of sales	$ 236	$ 298