The following tables summarize basic and dilutive earnings per share (in millions, except for per share amounts):



	Three Months Ended						Six Months Ended
	June 30, 2012			June 30, 2011			June 30, 2012			June 30, 2011
Basic earnings per share
Net income attributable to stockholders(a)	$	1,846		$	2,992		$	3,161		$	6,358
Less: cumulative dividends on preferred stock and undistributed earnings allocated to Series B Preferred Stock participating security(b)	(359		)	(468		)	(670		)	(971		)
Net income attributable to common stockholders	$	1,487		$	2,524		$	2,491		$	5,387
Weighted-average common shares outstanding - basic	1,569			1,505			1,571			1,505
Basic earnings per common share	$	0.95		$	1.68		$	1.59		$	3.58
Diluted earnings per share
Net income attributable to stockholders(a)	$	1,846		$	2,992		$	3,161		$	6,358
Less: cumulative dividends on preferred stock and undistributed earnings allocated to Series B Preferred Stock participating security(c)	(350		)	(447		)	(655		)	(924		)
Net income attributable to common stockholders	$	1,496		$	2,545		$	2,506		$	5,434
Weighted-average shares outstanding - diluted
Weighted-average common shares outstanding - basic	1,569			1,505			1,571			1,505
Dilutive effect of warrants	98			147			106			154
Dilutive effect of restricted stock units (RSUs)	4			2			4			2
Weighted-average common shares outstanding - diluted	1,671			1,654			1,681			1,661
Diluted earnings per common share	$	0.90		$	1.54		$	1.49		$	3.27

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(a)	Includes earned but undistributed dividends of $26 million on our Series A Preferred Stock and $20 million on our Series B Preferred Stock in the three and six months ended June 30, 2012 and 2011.