Balance Sheets (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
MidAmerican Energy Company [Member]
Utility plant, net:
Electric	$ 11,476	$ 11,416
Gas	1,307	1,301
Gross utility plant in service	12,783	12,717
Accumulated depreciation and amortization	(4,494)	(4,413)
Utility plant in service, net	8,289	8,304
Construction work in progress	358	318
Total utility plant, net	8,647	8,622
Current assets:
Cash and cash equivalents	96	354
Receivables, net	443	416
Income taxes receivable	77	0
Inventories	205	240
Other	67	56
Total current assets	888	1,066
Other assets:
Regulatory assets	841	876
Investments and nonregulated property, net	553	535
Other	127	133
Total other assets	1,521	1,544
Total assets	11,056	11,232
Capitalization:
MidAmerican Energy common shareholder's equity	3,604	3,608
Preferred securities	27	27
Long-term debt, excluding current portion	2,594	2,590
Total capitalization	6,225	6,225
Current liabilities:
Current portion of long-term debt	669	669
Accounts payable	344	386
Taxes accrued	91	224
Interest accrued	29	27
Other	91	120
Total current liabilities	1,224	1,426
Other liabilities:
Deferred income taxes	2,219	2,164
Asset retirement obligations	322	318
Regulatory liabilities	763	750
Other	303	349
Total other liabilities	3,607	3,581
Total capitalization and liabilities	$ 11,056	$ 11,232