Schedule I MidAmerican Funding, LLC Condensed Financial Statements Condensed Statements of Operations (Details) (MidAmerican Funding LLC [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Interest on long-term debt	$ 22	$ 22	$ 25
Income (loss) before income tax benefit	(22)	(22)	(25)
Income tax (benefit) expense	(9)	(9)	(11)
Equity in undistributed earnings of subsidiaries	353	355	318
Net income attributable to MidAmerican Funding	$ 340	$ 342	$ 304