Income Taxes (MEC) Components of Income Tax Expense (Benefit) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
MidAmerican Energy Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current federal	$ (196)	$ (256)	$ (474)
Current state	(10)	(21)	(6)
Total current income tax expense (benefit)	(206)	(277)	(480)
Deferred federal	101	200	453
Deferred state	3	(20)	11
Total deferred income tax expense (benefit)	104	180	464
Investment tax credits	(1)	(2)	(1)
Income tax expense (benefit)	$ (103)	$ (99)	$ (17)

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.