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Earnings per Common Share
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
Earnings per Common Share
The following table presents the calculation of basic and diluted earnings per common share.
Year ended December 31, ($ in millions, except per share data; shares in thousands) (a)
 
2016
 
2015
 
2014
Net income from continuing operations
 
$
1,111

 
$
897

 
$
925

Preferred stock dividends (b)
 
(30
)
 
(2,571
)
 
(268
)
Net income (loss) from continuing operations attributable to common shareholders
 
1,081

 
(1,674
)
 
657

(Loss) income from discontinued operations, net of tax
 
(44
)
 
392

 
225

Net income (loss) attributable to common shareholders
 
$
1,037

 
$
(1,282
)
 
$
882

Basic weighted-average common shares outstanding (c)
 
481,105

 
482,873

 
481,155

Diluted weighted-average common shares outstanding (c) (d)
 
482,182

 
482,873

 
481,934

Basic earnings per common share
 
 
 
 
 
 
Net income (loss) from continuing operations
 
$
2.25

 
$
(3.47
)
 
$
1.36

(Loss) income from discontinued operations, net of tax
 
(0.09
)
 
0.81

 
0.47

Net income (loss)
 
$
2.15

 
$
(2.66
)
 
$
1.83

Diluted earnings per common share
 
 
 
 
 
 
Net income (loss) from continuing operations
 
$
2.24

 
$
(3.47
)
 
$
1.36

(Loss) income from discontinued operations, net of tax
 
(0.09
)
 
0.81

 
0.47

Net income (loss)
 
$
2.15

 
$
(2.66
)
 
$
1.83

(a)
Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.
(b)
Preferred stock dividends for the year ended December 31, 2015, include $2,364 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized.
(c)
Includes shares related to share-based compensation that vested but were not yet issued for the years ended December 31, 2016, 2015, and 2014, respectively.
(d)
Due to the antidilutive effect of the net loss from continuing operations attributable to common shareholders for the year ended December 31, 2015, basic weighted-average common shares outstanding was used to calculate basic and diluted earnings per share.