v3.7.0.1
Income Taxes Income Taxes (Tables)
6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The table below shows our consolidated income tax expense (benefit) and our effective tax rates for the periods indicated (in millions):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Income tax expense (benefit)
$
63

 
$
(14
)
 
$
2

 
$
21

Effective tax rate
(41
)%
 
33
%
 
(1
)%
 
(10
)%