Statements of Cash Flows (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income	$ 189	$ 127
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	170	211
Deferred income taxes and amortization of investment tax credits	17	16
Changes in other assets and liabilities	22	28
Other, net	(29)	1
Changes in other operating assets and liabilities:
Receivables, net	(1)	32
Inventories	50	24
Derivative collateral, net	(47)	5
Pension and other postretirement benefit plans	(1)	4
Accounts payable	(22)	(35)
Taxes accrued	34	(133)
Other current assets and liabilities	18	22
Net cash flows from operating activities	400	302
Cash flows from investing activities:
Utility construction expenditures	(432)	(327)
Purchases of available-for-sale securities	(47)	(44)
Proceeds from sales of available-for-sale securities	44	37
Other, net	4	17
Net cash flows from investing activities	(431)	(317)
Cash flows from financing activities:
Dividends	0	(125)
Proceeds from long-term debt	847	0
Repayments of long-term debt	(356)	0
Redemption of preferred securities	0	(28)
Other, net	(7)	0
Net cash flows from financing activities	484	(153)
Net change in cash and cash equivalents	453	(168)
Cash and cash equivalents at beginning of period	194	354
Cash and cash equivalents at end of period	$ 647	$ 186