Components of Accumulated Other Comprehensive Loss, Net (MEC) (Tables) (MidAmerican Energy Company and Subsidiaries [Member])

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Accumulated Other Comprehensive Loss, Net [Line Items]

Components of Accumulated Other Comprehensive Loss, Net [Table Text Block]

The following table shows the change in accumulated other comprehensive loss by each component of other comprehensive income, net of applicable income taxes, for the year ended December 31, 2012 (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			Losses on			Other
	Available-For-Sale			Cash Flow			Comprehensive
	Securities			Hedges			Loss, Net
Balance, December 31, 2011	$	(8	)	$	(26	)	$	(34	)
Other comprehensive income	3			7			10
Balance, December 31, 2012	$	(5	)	$	(19	)	$	(24	)