Statements of Operations (Unaudited) - MEC - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenue:
Total operating revenue	$ 6,229	$ 6,612	$ 12,575	$ 12,642
Operating expenses:
Cost of sales	1,566	1,525	3,521	2,985
Total operating expenses	5,183	5,405	10,862	10,199
Operating income	1,046	1,207	1,713	2,443
Other income (expense):
Interest expense	(599)	(550)	(1,185)	(1,082)
Allowance for equity funds	61	42	110	80
Other, net	78	(26)	118	(21)
Total other income (expense)	3	2,042	315	336
Income (loss) before income tax expense (benefit) and equity income (loss)	1,049	3,249	2,028	2,779
Income tax expense (benefit)	(255)	149	(417)	(358)
Net income (loss) attributable to parent	1,075	2,897	2,064	2,768
MEC
Operating revenue:
Total operating revenue	759	897	1,679	1,902
Operating expenses:
Operations and maintenance	216	200	421	392
Depreciation and amortization	226	277	460	527
Property and other taxes	40	36	82	76
Total operating expenses	641	807	1,473	1,712
Operating income	118	90	206	190
Other income (expense):
Interest expense	(81)	(78)	(161)	(156)
Allowance for borrowed funds	4	5	8	9
Allowance for equity funds	13	14	24	29
Other, net	15	(12)	31	(15)
Total other income (expense)	(49)	(71)	(98)	(133)
Income (loss) before income tax expense (benefit) and equity income (loss)	69	19	108	57
Income tax expense (benefit)	(167)	(188)	(370)	(394)
Net income (loss) attributable to parent	236	207	478	451
Regulated electric | MEC
Operating revenue:
Total operating revenue	661	725	1,252	1,333
Operating expenses:
Cost of sales	113	174	228	299
Regulated natural gas and other | MEC
Operating revenue:
Total operating revenue	98	172	427	569
Operating expenses:
Cost of sales	$ 46	$ 120	$ 282	$ 418