The calculation of basic and diluted earnings per common share for the periods ended November 30 was as follows (in millions, except per share amounts):

		Three Months Ended				Six Months Ended
		2011		2010		2011		2010
Basic earnings per common share:
Net earnings allocable to common shares⁽¹⁾		$	495	$	282	$	959	$	661
Weighted-average common shares			315		314		316		314
Basic earnings per common share		$	1.57	$	0.90	$	3.04	$	2.11

Diluted earnings per common share:
Net earnings allocable to common shares⁽¹⁾		$	495	$	282	$	959	$	661

Weighted-average common shares			315		314		316		314
Dilutive effect of share-based awards			1		2		1		2
Weighted-average diluted shares			316		316		317		316
Diluted earnings per common share		$	1.57	$	0.89	$	3.02	$	2.09

Anti-dilutive options excluded from diluted
earnings per common share			14.2		11.2		13.7		11.3

	⁽¹⁾ Net earnings available to participating securities were immaterial in all periods presented.