Consolidated Statements of Operations (MEC) (MidAmerican Energy Company and Subsidiaries [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
MidAmerican Energy Company and Subsidiaries [Member]
Operating revenue:
Regulated electric	$ 380	$ 377
Regulated gas	263	333
Nonregulated	231	269
Total operating revenue	874	979
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	108	110
Cost of gas sold	186	242
Other operating expenses	102	101
Maintenance	46	47
Depreciation and amortization	93	85
Property and other taxes	29	30
Total regulated operating costs and expenses	564	615
Nonregulated operating costs and expenses:
Cost of sales	212	245
Other	6	6
Total nonregulated operating costs and expenses	218	251
Total operating costs and expenses	782	866
Operating income	92	113
Non-operating income:
Allowance for equity funds	2	2
Other, net	4	3
Total non-operating income	6	5
Fixed charges:
Interest on long-term debt	37	39
Other interest expense	0	1
Allowance for borrowed funds	(1)	(1)
Total fixed charges	36	39
Income before income tax (benefit) expense	62	79
Income tax (benefit) expense	(12)	5
Net income	74	74
Preferred dividends	0	0
Earnings on common stock	$ 74	$ 74