Investments and Nonregulated Property, Net (MEC) (Tables) (MidAmerican Energy Company and Subsidiaries [Member])

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Investments and Nonregulated Property, Net [Line Items]

Investments and Nonregulated Property, Net [Table Text Block]

Investments and nonregulated property, net consists of the following amounts as of December 31 (in millions):

	2012		2011
Nuclear decommissioning trust	$	337	$	306
Rabbi trusts	168		156
Auction rate securities	21		16
Nonregulated property, net of accumulated depreciation of $9 and $9, respectively	9		15
Coal transportation property, net of accumulated depreciation of $- and $4, respectively	—		8
Other	—		2
Total	$	535	$	503