Computation of Earnings Per Share (Tables)

3 Months Ended

Aug. 31, 2011

Computation Of Earnings Per Share (Tables) [Abstract]

Schedule of basic and diluted earnings per common share

		2011		2010
Basic earnings per common share:
Net earnings allocable to common shares(1)		$	463	$	379
Weighted-average common shares			316		314
Basic earnings per common share		$	1.46	$	1.21
Diluted earnings per common share:
Net earnings allocable to common shares(1)		$	463	$	379
Weighted-average common shares			316		314
Dilutive effect of share-based awards			2		1
Weighted-average diluted shares			318		315
Diluted earnings per common share		$	1.46	$	1.20
Anti-dilutive options excluded from diluted
	earnings per common share		13.2		11.4

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