Statements of Operations (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
MidAmerican Energy Company [Member]
Operating revenue:
Regulated electric	$ 512	$ 511	$ 1,338	$ 1,295
Regulated gas	98	87	555	441
Nonregulated	216	227	610	672
Total operating revenue	826	825	2,503	2,408
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	145	136	382	345
Cost of gas sold	55	44	367	275
Other operating expenses	103	107	320	309
Maintenance	57	52	172	150
Depreciation and amortization	97	106	308	299
Property and other taxes	29	27	89	86
Total regulated operating costs and expenses	486	472	1,638	1,464
Nonregulated operating costs and expenses:
Cost of sales	203	207	567	612
Other	7	7	19	20
Total nonregulated operating costs and expenses	210	214	586	632
Total operating costs and expenses	696	686	2,224	2,096
Operating income	130	139	279	312
Non-operating income:
Interest income	0	0	1	1
Allowance for equity funds	4	5	12	10
Other, net	3	3	10	7
Total non-operating income	7	8	23	18
Fixed charges:
Interest on long-term debt	36	34	106	107
Other interest expense	0	0	1	1
Allowance for borrowed funds	(1)	(2)	(4)	(4)
Total fixed charges	35	32	103	104
Income before income tax (benefit) expense	102	115	199	226
Income tax (benefit) expense	(43)	(25)	(73)	(69)
Net income	145	140	272	295
Preferred dividends	0	0	1	1
Earnings on common stock	$ 145	$ 140	$ 271	$ 294