Earnings (Loss) Per Share (Tables)

6 Months Ended

Nov. 30, 2011

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

	Three months ended November 30,						Six months ended November 30,
	2011			2010			2011			2010
Earnings from continuing operations attributable to Class A and Common Shares	$	82.9		$	76.8		$	57.9		$	43.0
Loss from discontinued operations attributable to Class A and Common Shares, net of tax		(0.5	)		(2.2	)		(2.5	)		(3.5	)
Net income attributable to Class A and Common Shares	$	82.4		$	74.6		$	55.4		$	39.5
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings per share (in millions)		31.2			34.4			31.1			35.3
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)		0.5			0.5			0.5			0.4
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings per share (in millions)		31.7			34.9			31.6			35.7
Earnings (loss) per share of Class A Stock and Common Stock:
Basic earnings (loss) per share:
Earnings from continuing operations	$	2.66		$	2.23		$	1.86		$	1.22
Loss from discontinued operations, net of tax	$	(0.02	)	$	(0.06	)	$	(0.08	)	$	(0.10	)
Net income	$	2.64		$	2.17		$	1.78		$	1.12
Diluted earnings (loss) per share:
Earnings from continuing operations	$	2.62		$	2.20		$	1.83		$	1.21
Loss from discontinued operations, net of tax	$	(0.02	)	$	(0.06	)	$	(0.08	)	$	(0.10	)
Net income	$	2.60		$	2.14		$	1.75		$	1.11