Stockholders' Equity

12 Months Ended

Dec. 31, 2013

Disclosure Text Block [Abstract]

Stockholders' Equity

13. Stockholders’ Equity

Common Stock  The following summarizes the changes in the Company’s outstanding shares of common stock:

millions	2013	2012	2011
Shares of common stock issued
Shares at January 1	519	516	513
Exercise of stock options	2	1	1
Issuance of restricted stock	2	2	2
Shares at December 31	523	519	516
Shares of common stock held in treasury
Shares at January 1	18	18	17
Shares received for restricted stock vested and options exercised	1	—	1
Shares at December 31	19	18	18
Shares of common stock outstanding at December 31	504	501	498

The following provides a reconciliation between basic and diluted EPS attributable to common stockholders for the years ended December 31:

millions except per-share amounts	2013		2012		2011
Net income (loss)
Net income (loss) attributable to common stockholders	$	801	$	2,391	$	(2,649	)
Less distributions on participating securities	2		1		—
Less undistributed income allocated to participating securities	4		14		—
Basic	$	795	$	2,376	$	(2,649	)
Diluted	$	795	$	2,376	$	(2,649	)
Shares
Average number of common shares outstanding—basic	502		500		498
Dilutive effect of stock options	3		2		—
Average number of common shares outstanding—diluted	505		502		498
Excluded (1)	4		6		12
Net income (loss) per common share
Basic	$	1.58	$	4.76	$	(5.32	)
Diluted	$	1.58	$	4.74	$	(5.32	)
Dividends per common share	$	0.54	$	0.36	$	0.36

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⁽¹⁾  Inclusion of certain shares would have had an anti-dilutive effect.