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Income Taxes Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The table below shows our consolidated income tax benefit from continuing operations (excluding noncontrolling interest) and our effective tax rates for the periods indicated (in millions):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2013
 
2012
 
2013
 
2012
Income tax benefit
$
(48
)
 
$
(52
)
 
$
(98
)
 
$
(58
)
Effective tax rate
41
%
 
14
%
 
33
%
 
15
%