Stockholders' Equity

3 Months Ended

Mar. 31, 2014

Disclosure Text Block [Abstract]

Stockholders' Equity

8. Stockholders’ Equity

The following provides a reconciliation between basic and diluted earnings per share attributable to common stockholders:

	Three Months Ended   March 31,
millions except per-share amounts	2014			2013
Net income (loss)
Net income (loss) attributable to common stockholders	$	(2,669	)	$	460
Less undistributed income allocated to participating securities	—			3
Basic	$	(2,669	)	$	457
Diluted	$	(2,669	)	$	457
Shares
Average number of common shares outstanding—basic	504			501
Dilutive effect of stock options	—			2
Average number of common shares outstanding—diluted	504			503
Excluded (1)	11			4
Net income (loss) per common share
Basic	$	(5.30	)	$	0.91
Diluted	$	(5.30	)	$	0.91
Dividends per common share	$	0.18		$	0.09

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