v3.8.0.1
Income Taxes Income Taxes (Tables)
9 Months Ended
Sep. 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 September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Income tax expense (benefit)
$
(2
)
 
$
(4
)
 
$

 
$
17

Effective tax rate
(1
)%
 
(1
)%
 
%
 
20
%