Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating revenue:
Total operating revenue	$ 5,637	$ 5,283	$ 15,070	$ 14,003
Cost of sales	1,271	1,212	3,565	3,380
Operating expenses:
Total operating expenses	4,114	3,643	11,704	10,351
Operating income	1,523	1,640	3,366	3,652
Other income (expense):
Interest expense	(453)	(464)	(1,380)	(1,379)
Allowance for borrowed funds	17	14	44	34
Allowance for equity funds	30	24	75	59
Other, net	19	(17)	50	8
Total other income (expense)	(100)	(408)	(1,462)	(1,185)
Income before income tax (benefit) expense and equity income	1,423	1,232	1,904	2,467
Income tax expense (benefit)	23	184	(366)	319
Net Income (Loss) Attributable to Parent	1,401	1,068	2,286	2,198
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	832	813	2,295	2,166
Operating expenses:
Operations and maintenance	201	204	598	561
Depreciation and amortization	133	111	499	369
Property and other taxes	30	30	92	90
Total operating expenses	554	529	1,851	1,650
Operating income	278	284	444	516
Other income (expense):
Interest expense	(56)	(54)	(170)	(160)
Allowance for borrowed funds	6	4	14	9
Allowance for equity funds	16	11	39	25
Other, net	13	9	34	27
Total other income (expense)	(21)	(30)	(83)	(99)
Income before income tax (benefit) expense and equity income	257	254	361	417
Income tax expense (benefit)	(226)	(131)	(334)	(207)
Net Income (Loss) Attributable to Parent	483	385	695	624
Regulated electric | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	727	707	1,785	1,677
Cost of sales	140	130	366	342
Regulated natural gas and other | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	105	106	510	489
Cost of sales	$ 50	$ 54	$ 296	$ 288