Computation of Earnings Per Share (Tables)

6 Months Ended

Nov. 30, 2011

Computation Of Earnings Per Share (Tables) [Abstract]

Schedule of basic and diluted earnings per common share

		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.