Balance Sheets (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
MidAmerican Energy Company [Member]
Utility plant, net:
Electric	$ 13,426	$ 11,936
Gas	1,432	1,365
Gross utility plant in service	14,858	13,301
Accumulated depreciation and amortization	(4,954)	(4,710)
Utility plant in service, net	9,904	8,591
Construction work in progress	606	737
Total utility plant, net	10,510	9,328
Current assets:
Cash and cash equivalents	29	194	354
Receivables, net	433	454
Income taxes receivable	307	50
Inventories	185	229
Other	87	64
Total current assets	1,041	991
Other assets:
Regulatory assets	908	748
Investments and nonregulated property, net	634	598
Other	164	204
Total other assets	1,706	1,550
Total assets	13,257	11,869	11,232
Capitalization:
MidAmerican Energy common shareholder's equity	4,250	3,845
Long-term debt, excluding current portion	3,630	3,202
Total capitalization	7,880	7,047
Current liabilities:
Short-term debt	50	0
Current portion of long-term debt	426	350
Accounts payable	392	368
Taxes accrued	128	118
Interest accrued	40	37
Other	131	97
Total current liabilities	1,167	970
Other liabilities:
Deferred income taxes	2,663	2,294
Asset retirement obligations	432	430
Regulatory liabilities	837	875
Other	278	253
Total other liabilities	4,210	3,852
Total capitalization and liabilities	$ 13,257	$ 11,869