
	For the three months ended				For the nine months ended
	September 30,				September 30,
	2016		2015		2016		2015
	(in millions, except share/per share amounts)
Net loss	$	(708)	$	(1,739)	$	(2,433)	$	(2,449)
Mandatory convertible preferred stock dividend		27		27		81		79
Net loss attributable to common stock	$	(735)	$	(1,766)	$	(2,514)	$	(2,528)

Number of common shares:
Weighted average outstanding		482,485,150		382,098,080		417,222,661		379,909,748
Issued upon assumed exercise of outstanding stock options (1)		–		–		–		–
Effect of issuance of non-vested restricted common stock (2)		–		–		–		–
Effect of issuance of non-vested performance units (3)		–		–		–		–
Effect of issuance of mandatory convertible preferred stock (4)		–		–		–		–
Effect of declaration of preferred stock dividends (5)		–		–		–		–
Weighted average and potential dilutive outstanding		482,485,150		382,098,080		417,222,661		379,909,748

Loss per common share:
Basic	$	(1.52)	$	(4.62)	$	(6.02)	$	(6.65)
Diluted	$	(1.52)	$	(4.62)	$	(6.02)	$	(6.65)

(1)

Due to the net loss for the three and nine months ended September 30, 2016 and 2015, the unvested stock options were not recognized in diluted earnings per share calculations as they would have had an antidilutive effect. Options for 3,409,596 shares and 3,714,095 shares were excluded from the calculation of diluted shares for the three and nine months ended September 30, 2016, respectively, because they would have had an antidilutive effect. Options for 3,796,778 shares and 3,778,140 shares were excluded from the calculation of diluted shares for the three and nine months ended September 30, 2015, respectively, because they would have had an antidilutive effect.

(2)

Due to the net loss for the three and nine months ended September 30, 2016 and 2015, the unvested share-based payments were not recognized in diluted earnings per share calculations as they would have had an antidilutive effect. The calculation excluded 599,372 shares and 993,576 shares of restricted stock for the three and nine months ended September 30, 2016, respectively, because they would have had an antidilutive effect. The calculation excluded 1,469,380 shares and 1,472,379 shares of restricted stock for the three and nine months ended September 30, 2015, respectively, because they would have had an antidilutive effect.

(3)

Due to the net loss for the three and nine months ended September 30, 2016, 935,330 shares and 762,171 shares, respectively, of performance units were excluded from the calculation of diluted earnings per share as they would have had an antidilutive effect. Due to the net loss for the three and nine months ended September 30, 2015, the calculation excluded 89,802 shares and 135,836 shares, respectively, of performance units as they would have had an antidilutive effect.

(4)

Due to the net loss for the three and nine months ended September 30, 2016, 74,999,895 of weighted average common shares issuable upon the assumed conversion of the mandatory convertible preferred stock were excluded from the diluted earnings per share calculation as they would have had an antidilutive effect. Due to the net loss for the three and nine months ended September 30, 2015, 74,999,895 and 69,505,397 of weighted average common shares issuable upon the assumed conversion of the mandatory convertible preferred stock were excluded from the diluted earnings per share calculation, respectively, as they would have had an antidilutive effect.

(5)

Due to the net loss for the three months ended September 30, 2016, the 2,043,780 shares of common stock declared as preferred stock dividends were excluded from the diluted earnings per share calculations as they would have had an antidilutive effect.