Non-Operating Other, Net (LLC) (Details) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Other Income (Expense), Nonoperating [Line Items]
Non-Operating Other, Net	$ 21	$ 13	$ 10
Corporate-owned life insurance income [Member]
Components of Other Income (Expense), Nonoperating [Line Items]
Non-Operating Other, Net	15	9	5
Gains on sales of assets and other investments [Member]
Components of Other Income (Expense), Nonoperating [Line Items]
Non-Operating Other, Net	1	2	2
Other, net [Member]
Components of Other Income (Expense), Nonoperating [Line Items]
Non-Operating Other, Net	$ 5	$ 2	$ 3