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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Reconciliation
The following table presents a reconciliation of basic and diluted earnings per common share (in millions, except share data and per share amounts): 
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
 
 
 
 
 
Net income
$
614

 
$
552

 
$
268

Preferred stock dividends
25

 

 

Net income available to common shareholders
$
589

 
$
552

 
$
268

 
 
 
 
 
 
Share data (in thousands):
 
 
 
 
 
Basic weighted-average shares outstanding
273,190

 
277,789

 
290,762

Effect of weighted-average dilutive securities:
 
 
 
 
 
Restricted stock and options
1,076

 
872

 
1,429

Convertible debentures
86

 
387

 
2,820

Diluted weighted-average shares outstanding(1)
274,352

 
279,048

 
295,011

 
 
 
 
 
 
Basic earnings per common share
$
2.16

 
$
1.99

 
$
0.92

Diluted earnings per common share(1)
$
2.15

 
$
1.98

 
$
0.91