Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue:
Total operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Operating expenses:
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax (benefit) expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net income (loss) attributable to parent	4	670
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	1,067	681
Operating expenses:
Operations and maintenance	193	165
Depreciation and amortization	207	176
Property and other taxes	36	34
Total operating expenses	1,019	583
Operating income	48	98
Other income (expense):
Interest expense	(74)	(76)
Allowance for borrowed funds	2	3
Allowance for equity funds	6	8
Other, net	11	(5)
Total other income (expense)	(55)	(70)
Income before income tax (benefit) expense and equity income	(7)	28
Income tax benefit	(154)	(123)
Net income (loss) attributable to parent	147	151
Regulated electric | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	545	471
Cost of sales	151	80
Regulated natural gas and other | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	522	210
Cost of sales	$ 432	$ 128