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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table shows how we computed basic and diluted earnings per common share for the three months ended March 31, 2020 and 2019 (dollars and share data in millions):
 
Three Months Ended March 31,
 
2020
 
2019
Net (loss) income
$
(268
)
 
$
42

 
 
 
 
Weighted average basic shares
277.2

 
305.3

Effect of dilutive securities

 
1.6

Weighted average diluted shares
277.2

 
306.9

 
 
 
 
(Loss) earnings per common share
 
 
 
Basic
$
(0.97
)
 
$
0.14

Diluted
$
(0.97
)
 
$
0.14