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Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2013
Statement of Other Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The table below presents the components in accumulated other comprehensive loss, net of tax:
 
 
June 30,
2013
 
December 31, 2012
Commodity hedges
 
$
—

 
$
(3
)
Benefit plans:
 
 

 
 

Net actuarial loss and prior service costs — pensions
 
(9
)
 
(11
)
Net actuarial gain and prior service credit — OPEB plans
 
(11
)
 
(11
)
Total accumulated other comprehensive loss, net of tax
 
$
(20
)
 
$
(25
)