Statements of Cash Flows (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income	$ 127	$ 155
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	211	193
Deferred income taxes and amortization of investment tax credits	16	22
Changes in other assets and liabilities	28	22
Other, net	1	(8)
Changes in other operating assets and liabilities:
Receivables, net	32	51
Inventories	24	0
Derivative collateral, net	5	0
Contributions to pension and other postretirement benefit plans, net	4	(55)
Accounts payable	(35)	0
Taxes accrued	(133)	432
Other current assets and liabilities	22	3
Net cash flows from operating activities	302	815
Cash flows from investing activities:
Utility construction expenditures	(327)	(259)
Purchases of available-for-sale securities	(44)	(29)
Proceeds from sales of available-for-sale securities	37	20
Other, net	17	7
Net cash flows from investing activities	(317)	(261)
Cash flows from financing activities:
Dividends	(125)	(1)
Repayment of long-term debt	0	(283)
Redemption of preferred securities	(28)	0
Net cash flows from financing activities	(153)	(284)
Net change in cash and cash equivalents	(168)	270
Cash and cash equivalents at beginning of period	354	1
Cash and cash equivalents at end of period	$ 186	$ 271