The following table presents the calculation of basic and diluted earnings per common share.



	Three months ended September 30,						Nine months ended September 30,
($ in millions, except share data) (a)	2015			2014			2015			2014
Net income from continuing operations	$	273		$	293		$	621		$	774
Preferred stock dividends (b)	(38		)	(67		)	(1,356		)	(200		)
Net income (loss) from continuing operations attributable to common shareholders	235			226			(735		)	574
(Loss) income from discontinued operations, net of tax	(5		)	130			405			199
Net income (loss) attributable to common shareholders	$	230		$	356		$	(330	)	$	773
Basic weighted-average common shares outstanding (c)	483,073,329			481,611,138			482,725,342			480,916,395
Diluted weighted-average common shares outstanding (c) (d)	484,399,091			482,506,091			482,725,342			481,545,506
Basic earnings per common share
Net income (loss) from continuing operations	$	0.49		$	0.47		$	(1.52	)	$	1.19
(Loss) income from discontinued operations, net of tax	(0.01		)	0.27			0.84			0.41
Net income (loss)	$	0.48		$	0.74		$	(0.68	)	$	1.60
Diluted earnings per common share
Net income (loss) from continuing operations	$	0.49		$	0.47		$	(1.52	)	$	1.19
(Loss) income from discontinued operations, net of tax	(0.01		)	0.27			0.84			0.41
Net income (loss)	$	0.47		$	0.74		$	(0.68	)	$	1.60


(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 nine months ended September 30, 2015, include $1,193 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. Refer to Note 16 for additional preferred stock information.


(c)	Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months ended September 30, 2015, and 2014, respectively.


(d)	Due to antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months ended September 30, 2015, basic weighted-average common shares outstanding were used to calculate basic and diluted earnings per share.