Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenue:
Total operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Operating expenses:
Total operating expenses	3,691	3,569
Operating income	919	871
Other income (expense):
Interest expense	(477)	(466)
Allowance for borrowed funds	16	12
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax (benefit) expense and equity income	487	285
Income tax benefit	(148)	(221)
Net Income (Loss) Attributable to Parent	622	513
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	842	746
Operating expenses:
Operations and maintenance	207	190
Depreciation and amortization	177	158
Property and other taxes	34	32
Total operating expenses	727	667
Operating income	115	79
Other income (expense):
Interest expense	(69)	(58)
Allowance for borrowed funds	6	4
Allowance for equity funds	15	10
Other, net	20	9
Total other income (expense)	(28)	(35)
Income before income tax (benefit) expense and equity income	87	44
Income tax benefit	(106)	(62)
Net Income (Loss) Attributable to Parent	193	106
Regulated electric | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	542	469
Cost of sales	114	108
Regulated natural gas and other | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	300	277
Cost of sales	$ 195	$ 179