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Non-operating Other, Net (MEC) (MidAmerican Energy Company and Subsidiaries [Member])
 12 Months Ended
Dec. 31, 2011
MidAmerican Energy Company and Subsidiaries [Member]
  
Notes to Consolidated Financial Statements [Line Items]  
Other Income and Other Expense Disclosure [Text Block]
(17)    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):

 
2011
 
2010
 
2009
 
 
 
 
 
 
Corporate-owned life insurance income
$
5

 
$
8

 
$
10

Gains on sales of assets and other investments
2

 
—

 
2

Impairment of assets
—

 
(8
)
 
—

Other, net
—

 
(2
)
 
—

Total
$
7

 
$
(2
)
 
$
12


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