Consolidated Statements of Cash Flows (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income	$ 71	$ 69
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	93	85
Deferred income taxes and amortization of investment tax credits	13	29
Changes in other assets and liabilities	11	8
Other, net	(6)	4
Changes in other operating assets and liabilities:
Receivables, net	35	14
Inventories	18	35
Derivative collateral, net	8	12
Contributions to pension and other postretirement benefit plans, net	2	3
Accounts payable	(38)	(46)
Taxes accrued	(48)	(30)
Other current assets and liabilities	(10)	(5)
Net cash flows from operating activities	149	178
Cash flows from investing activities:
Utility construction expenditures	(117)	(98)
Purchases of available-for-sale securities	(14)	(29)
Proceeds from sales of available-for-sale securities	8	33
Other, net	7	2
Net cash flows from investing activities	(116)	(92)
Cash flows from financing activities:
Repayment of long-term debt	0	(200)
Net change in note payable to affiliate	9	213
Net cash flows from financing activities	9	13
Net change in cash and cash equivalents	42	99
Cash and cash equivalents at beginning of period	1	203
Cash and cash equivalents at end of period	$ 43	$ 302