v2.4.0.8
Discontinued Operations (Tables)
 6 Months Ended
Jun. 30, 2013
Discontinued Operations  
Summarized results income statement, assets and liabilities of discontinued operations
The summarized results of operations included in income from discontinued operations were as follows (in millions):
 
 

 
   
Three months ended
June 30,
    
Six months ended
June 30,
  
   
2013
    
2012
    
2013
    
2012
  
Operating revenues
  
$
229
    
$
248
    
$
469
    
$
478
  
Operating and maintenance expense
    
(233
)
    
(255
)
    
(482
)
    
(478
)
Depreciation and amortization expense
    
—
      
(65
)
    
—
      
(135
)
Loss on impairment of assets in discontinued operations, net
    
—
      
(12
)
    
—
      
(105
)
Gain on disposal of assets in discontinued operations, net
    
3
      
72
      
18
      
71
  
Income (loss) from discontinued operations before income tax expense
    
(1
)
    
(12
)
    
5
      
(169
)
Income tax benefit (expense)
    
(9
)
    
12
      
(15
)
    
33
  
Income (loss) from discontinued operations, net of tax
  
$
(10
)
  
$
—
    
$
(10
)
  
$
(136
)
 

 
 
Assets and liabilities of discontinued operations
The carrying amounts of the major classes of assets and liabilities associated with our discontinued operations were classified as follows (in millions):
 
 

 
   
June 30,
2013
    
December 31,
2012
  
Assets
                
Rigs and related equipment, net
  
$
59
    
$
104
  
Materials and supplies, net
    
68
      
71
  
Other related assets
    
7
      
4
  
Assets held for sale
  
$
134
    
$
179
  
                 
Liabilities
                
Deferred revenues
  
$
57
    
$
32
  
Other liabilities
    
—
      
3
  
Other current liabilities
  
$
57
    
$
35