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Income Taxes Effective Income Tax Rates (Tables)
 9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
Effective Income Tax Rate [Table Text Block]
For the third quarter and first nine months of 2017 and 2016, our effective income tax rates on continuing operations were as follows:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In millions)
 
2017
 
2016
 
2017
 
2016
Total pre-tax income (loss) from continuing operations
 
$
(458
)
 
$
(313
)
 
$
(586
)
 
$
(1,118
)
Total income tax expense (benefit)
 
$
141

 
$
(107
)
 
$
216

 
$
(414
)
Effective income tax expense (benefit) rate on continuing operations
 
31
%
 
(34
)%
 
37
%
 
(37
)%
 
 
 
 
 
 
 
 
 
Income taxes at the statutory tax rate of 35%
 
$
(160
)
 
$
(109
)
 
$
(205
)
 
$
(390
)
Effects of foreign operations
 
31

 
(8
)
 
29

 
(39
)
Adjustments to valuation allowances
 
228

 
11

 
361

 
17

State income taxes
 
—

 
(2
)
 
(13
)
 
(4
)
Other federal tax effects
 
42

 
1

 
44

 
2

Income tax expense (benefit) on continuing operations
 
$
141

 
$
(107
)
 
$
216

 
$
(414
)