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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Income Tax Provision (Benefit)
The income tax provision relating to continuing operations consists of the following:
 
Three Months Ended
March 31,
(millions)
2015
 
2014
Current
$
10

 
$
60

Deferred
(30
)
 
17

Total Income Tax (Benefit) Provision
$
(20
)
 
$
77

Effective Tax Rate
47.6
%
 
27.6
%