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Non-Operating Other, Net (MEC) (MidAmerican Energy Company and Subsidiaries [Member])
 12 Months Ended
Dec. 31, 2012
MidAmerican Energy Company and Subsidiaries [Member]
  
Components of Other Income (Expense), Nonoperating [Line Items]  
Other Income and Other Expense Disclosure [Text Block]
(16)    Non-Operating Other, Net

Non-operating income - other, net; as shown on the Consolidated Statements of Operations, includes the following other income and (expense) items for the years ended December 31 (in millions):
 
2012
 
2011
 
2010
 
 
 
 
 
 
Corporate-owned life insurance income
$
9

 
$
5

 
$
8

Gains on sales of assets and other investments
2

 
2

 
—

Impairment of assets
—

 
—

 
(8
)
Other, net
(2
)
 
—

 
(2
)
Total
$
9

 
$
7

 
$
(2
)


MidAmerican Energy recorded an impairment loss of $8 million for an asset held for sale in 2010.