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Earnings (Loss) Per Common Share Level 1 (Notes)
 3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
The following table presents the computation of basic and diluted earnings per common share.
 
Three Months Ended March 31,
(In millions, except for per share data)
2016
2015
Earnings
 
 
Net income
$
323

$
467

Shares
 
 
Weighted average common shares outstanding, basic
398.5

422.6

Dilutive effect of stock compensation plans
4.2

5.5

Dilutive effect of warrants
3.6

5.6

Weighted average common shares outstanding and dilutive potential common shares
406.3

433.7

Net income per common share
 
 
Basic
$
0.81

$
1.11

Diluted
$
0.79

$
1.08