Balance Sheets (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
MidAmerican Energy Company [Member]
Utility plant, net:
Electric	$ 11,527	$ 11,416
Gas	1,316	1,301
Gross utility plant in service	12,843	12,717
Accumulated depreciation and amortization	(4,575)	(4,413)
Utility plant in service, net	8,268	8,304
Construction work in progress	431	318
Total utility plant, net	8,699	8,622
Current assets:
Cash and cash equivalents	186	354
Receivables, net	380	416
Income taxes receivable	20	0
Inventories	216	240
Other	72	56
Total current assets	874	1,066
Other assets:
Regulatory assets	844	876
Investments and nonregulated property, net	553	535
Other	122	133
Total other assets	1,519	1,544
Total assets	11,092	11,232
Capitalization:
MidAmerican Energy common shareholder's equity	3,613	3,608
Preferred securities	0	27
Long-term debt, excluding current portion	2,598	2,590
Total capitalization	6,211	6,225
Current liabilities:
Current portion of long-term debt	669	669
Accounts payable	300	386
Taxes accrued	113	224
Interest accrued	41	27
Other	120	120
Total current liabilities	1,243	1,426
Other liabilities:
Deferred income taxes	2,219	2,164
Asset retirement obligations	326	318
Regulatory liabilities	775	750
Other	318	349
Total other liabilities	3,638	3,581
Total capitalization and liabilities	$ 11,092	$ 11,232