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Income per Common Share (Notes)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Income (Loss) per Common Share
Income (Loss) per Common Share
Basic income (loss) per share is based on the weighted average number of common shares outstanding.  Diluted income per share assumes exercise of stock options in all years, provided the effect is not antidilutive. The per share calculations below exclude 10 million and 11 million stock options for the three and nine month periods ended September 30, 2017 and 13 million stock options for the three and nine month periods ended September 30, 2016 that were antidilutive.
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In millions, except per share data)
2017
 
2016
 
2017
 
2016
Income (loss) from operations
$
(599
)
 
$
(206
)
 
$
(802
)
 
$
(704
)
Income (loss) from discontinued operations
—

 
14

 
(4,893
)
 
(65
)
Net income (loss)
$
(599
)
 
$
(192
)
 
$
(5,695
)
 
$
(769
)
 
 
 
 
 
 
 
 
Weighted average common shares outstanding
850

 
847

 
850

 
809

Per basic share:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
(0.70
)
 
$
(0.24
)
 
$
(0.94
)
 
$
(0.87
)
Income (loss) from discontinued operations
$
—

 
$
0.01

 
$
(5.76
)
 
$
(0.08
)
Net income
$
(0.70
)
 
$
(0.23
)
 
$
(6.70
)
 
$
(0.95
)
Per diluted share:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
(0.70
)
 
$
(0.24
)
 
$
(0.94
)
 
$
(0.87
)
Income (loss) from discontinued operations
$
—

 
$
0.01

 
$
(5.76
)
 
$
(0.08
)
Net income
$
(0.70
)
 
$
(0.23
)
 
$
(6.70
)
 
$
(0.95
)