Statements of Operations (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Operating revenue:
Regulated electric	$ 411	$ 404	$ 826	$ 784
Regulated gas	142	91	457	354
Nonregulated	204	214	394	445
Total operating revenue	757	709	1,677	1,583
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	114	101	237	209
Cost of gas sold	88	45	312	231
Other operating expenses	111	100	217	202
Maintenance	70	52	115	98
Depreciation and amortization	104	100	211	193
Property and other taxes	30	30	60	59
Total regulated operating costs and expenses	517	428	1,152	992
Nonregulated operating costs and expenses:
Cost of sales	190	193	364	405
Other	7	7	12	13
Total nonregulated operating costs and expenses	197	200	376	418
Total operating costs and expenses	714	628	1,528	1,410
Operating income	43	81	149	173
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	4	3	8	5
Other, net	3	0	7	4
Total non-operating income	8	4	16	10
Fixed charges:
Interest on long-term debt	35	36	70	73
Other interest expense	1	1	1	1
Allowance for borrowed funds	(2)	(1)	(3)	(2)
Total fixed charges	34	36	68	72
Income before income tax (benefit) expense	17	49	97	111
Income tax (benefit) expense	(7)	(32)	(30)	(44)
Net income	24	81	127	155
Preferred dividends	1	1	1	1
Earnings on common stock	$ 23	$ 80	$ 126	$ 154