Schedule I MidAmerican Funding, LLC Condensed Financial Statements Condensed Statements of Cash Flows (Details) (MidAmerican Funding LLC [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash flows from operating activities	$ (13)	$ (18)	$ (21)
Net cash flows from investing activities:
Dividend from subsidiary	0	0	114
Net cash flows from investing activities	0	0	114
Net cash flows from financing activities:
Distribution to member	0	0	(114)
Repayments of long-term debt	0	(200)	0
Net change in amounts payable to subsidiary	13	218	21
Net cash flows from financing activities	13	18	(93)
Net change in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of year	0	0	0
Cash and cash equivalents at end of year	$ 0	$ 0	$ 0