Consolidated Statements of Cash Flows (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income	$ 265	$ 285
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	308	299
Deferred income taxes and amortization of investment tax credits	42	88
Changes in other assets and liabilities	42	35
Other, net	(4)	(10)
Changes in other operating assets and liabilities:
Receivables, net	30	44
Inventories	(6)	(36)
Derivative collateral, net	6	9
Pension and other postretirement benefit plans	6	(54)
Accounts payable	(7)	2
Taxes accrued	(117)	418
Other current assets and liabilities	10	8
Net cash flows from operating activities	575	1,088
Cash flows from investing activities:
Utility construction expenditures	(598)	(445)
Purchases of available-for-sale securities	(80)	(46)
Proceeds from sales of available-for-sale securities	70	32
Other, net	20	14
Net cash flows from investing activities	(588)	(445)
Cash flows from financing activities:
Proceeds from long-term debt	947	0
Repayment of long-term debt	0	(283)
Redemption of preferred securities of subsidiary	(28)	0
Net change in note payable to affiliate	(111)	15
Other, net	(7)	(1)
Net cash flows from financing activities	801	(269)
Net change in cash and cash equivalents	788	374
Cash and cash equivalents at beginning of period	354	1
Cash and cash equivalents at end of period	$ 1,142	$ 375