Computation of Earnings Per Share (Tables)

6 Months Ended

Nov. 30, 2012

Computation Of Earnings Per Share (Tables) [Abstract]

Schedule of basic and diluted earnings per common share

		Three Months Ended				Six Months Ended
		2012		2011		2012		2011
Basic earnings per common share:
Net earnings allocable to common shares(1)		$	437	$	495	$	895	$	959
Weighted-average common shares			314		315		314		316
Basic earnings per common share		$	1.39	$	1.57	$	2.85	$	3.04
Diluted earnings per common share:
Net earnings allocable to common shares(1)		$	437	$	495	$	895	$	959
Weighted-average common shares			314		315		314		316
Dilutive effect of share-based awards			1		1		2		1
Weighted-average diluted shares			315		316		316		317
Diluted earnings per common share		$	1.39	$	1.57	$	2.84	$	3.02
Anti-dilutive options excluded from diluted
earnings per common share			14.3		14.2		14.1		13.7
	(1) Net earnings available to participating securities were immaterial in all periods presented.