Income Taxes (LLC) Components of Income Tax Expense (Benefit) (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
MidAmerican Funding, LLC and Subsidiaries [Domain]
Components of Income Tax Expense (Benefit) [Line Items]
Current federal	$ (200)	$ (260)	$ (480)
Current state	(12)	(23)	(8)
Total current income tax expense (benefit)	(212)	(283)	(488)
Deferred federal	100	198	452
Deferred state	3	(21)	11
Total deferred income tax expense (benefit)	103	177	463
Investment tax credits	(1)	(2)	(1)
Total income tax (benefit) expense	$ (110)	$ (108)	$ (26)

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.