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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]  
Income Tax Provision (Benefit)
The income tax provision (benefit) consists of the following:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(millions)
2017
 
2016
 
2017
 
2016
Current (1)
$
37

 
$
45

 
$
49

 
$
65

Deferred
(873
)
 
(228
)
 
(873
)
 
(414
)
Total Income Tax Benefit
$
(836
)
 
$
(183
)
 
$
(824
)
 
$
(349
)
Effective Tax Rate
35.8
%
 
36.7
%
 
36.2
%
 
36.7
%

(1) Current income taxes are attributable to our operations in Israel and Equatorial Guinea.