Statements of Cash Flows (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income	$ 103	$ 74
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	107	93
Deferred income taxes and amortization of investment tax credits	8	13
Changes in other assets and liabilities	13	11
Other, net	(4)	(5)
Changes in other operating assets and liabilities:
Receivables, net	(21)	32
Inventories	35	18
Derivative collateral, net	3	8
Contributions to pension and other postretirement benefit plans, net	3	2
Accounts payable	(2)	(38)
Taxes accrued	(211)	(46)
Other current assets and liabilities	(2)	(4)
Net cash flows from operating activities	32	158
Cash flows from investing activities:
Utility construction expenditures	(163)	(117)
Purchases of available-for-sale securities	(29)	(14)
Proceeds from sales of available-for-sale securities	26	8
Other, net	1	6
Net cash flows from investing activities	(165)	(117)
Cash flows from financing activities:
Dividends	(125)	0
Net cash flows from financing activities	(125)	0
Net change in cash and cash equivalents	(258)	41
Cash and cash equivalents at beginning of period	354	1
Cash and cash equivalents at end of period	$ 96	$ 42