Consolidated Statements of Cash Flows (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income	$ 99	$ 155
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	100	85
Deferred income taxes and amortization of investment tax credits	0	(16)
Changes in other assets and liabilities	11	12
Other, net	(6)	(5)
Changes in other operating assets and liabilities:
Receivables, net	44	(155)
Inventories	34	61
Derivative collateral, net	15	(32)
Pension and other postretirement benefit plans	(2)	0
Accounts payable	(45)	44
Taxes accrued, net	(37)	(32)
Other current assets and liabilities	(16)	(25)
Net cash flows from operating activities	197	92
Cash flows from investing activities:
Utility construction expenditures	(244)	(179)
Purchases of available-for-sale securities	(27)	(23)
Proceeds from sales of available-for-sale securities	19	22
Proceeds from sales of investments	13	0
Other, net	2	6
Net cash flows from investing activities	(237)	(174)
Cash flows from financing activities:
Net change in note payable to affiliate	(4)	2
Net proceeds from short-term debt	15	0
Net cash flows from financing activities	11	2
Net change in cash and cash equivalents	(29)	(80)
Cash and cash equivalents at beginning of period	30	194
Cash and cash equivalents at end of period	$ 1	$ 114