Consolidated Statements of Operations - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating revenue:
Total operating revenue	$ 4,993	$ 4,554	$ 9,433	$ 8,720
Operating expenses:
Total operating expenses	4,021	3,509	7,590	6,708
Operating income	972	1,045	1,843	2,012
Other income (expense):
Other Interest and Dividend Income	(461)	(457)	(927)	(915)
Allowance for borrowed funds	15	10	27	20
Allowance for equity funds	24	18	45	35
Other, net	1	(1)	31	25
Total other income (expense)	(776)	(401)	(1,362)	(777)
Income before income tax (benefit) expense and equity income	196	644	481	1,235
Income tax (benefit) expense	(168)	83	(389)	135
Net Income (Loss) Attributable to Parent	372	574	885	1,130
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Electric Domestic Regulated Revenue	589	537	1,058	970
Gas Domestic Regulated Revenue And Other Revenue	129	122	407	385
Total operating revenue	718	659	1,465	1,355
Operating expenses:
Cost of fuel and energy	118	110	226	212
Cost of gas purchased for resale and other	67	63	247	235
Utilities Operating Expense, Maintenance and Operations	208	185	398	357
Utilities Operating Expense, Depreciation and Amortization	208	141	366	258
Utilities Operating Expense, Taxes	30	29	62	60
Total operating expenses	631	528	1,299	1,122
Operating income	87	131	166	233
Other income (expense):
Other Interest and Dividend Income	(61)	(59)	(124)	(118)
Allowance for borrowed funds	4	3	8	5
Allowance for equity funds	13	8	23	14
Other, net	13	7	23	18
Total other income (expense)	(31)	(41)	(70)	(81)
Income before income tax (benefit) expense and equity income	56	90	96	152
Income tax (benefit) expense	(47)	(41)	(110)	(81)
Net Income (Loss) Attributable to Parent	$ 103	$ 131	$ 206	$ 233