Earnings Per Share (Tables)

12 Months Ended

Apr. 30, 2012

Earnings Per Share [Abstract]

Computations Of Basic And Diluted Earnings Per Share

	(in 000s, except per share amounts)
Year ended April 30,	2012			2011			2010
Net income from continuing operations attributable to shareholders	$	345,968		$	392,547		$	455,123
Amounts allocated to participating securities (nonvested shares)		(455	)		(1,007	)		(1,750	)
Net income from continuing operations attributable to common shareholders	$	345,513		$	391,540		$	453,373
Basic weighted average common shares		297,863			309,230			332,283
Potential dilutive shares		738			547			953
Dilutive weighted average common shares		298,601			309,777			333,236
Earnings per share from continuing operations attributable to common shareholders:
Basic	$	1.16		$	1.27		$	1.37
Diluted		1.16			1.27			1.36