Consolidated Statements of Operations (USD $) In Millions, except Per Share data	12 Months Ended
	May 31, 2011	May 31, 2010	May 31, 2009
Revenues	$ 1,906.1	$ 1,912.9	$ 1,849.3
Operating costs and expenses:
Cost of goods sold (exclusive of depreciation)	885.9	859.8	881.7
Selling, general and administrative expenses	835.7	803.4	777.2
Bad debt expense	13.6	9.5	15.8
Depreciation and amortization	60.1	59.5	61.2
Severance	6.7	9.2	26.5
Impairment charge	3.4	43.1	26.3
Total operating costs and expenses	1,805.4	1,784.5	1,788.7
Operating income	100.7	128.4	60.6
Other (expense) income	(0.4)	0.9	0.7
Interest income	1.5	1.6	1.2
Interest expense	(17.1)	(17.8)	(24.2)
Loss on investments	(3.6)	(1.5)	(13.5)
Earnings from continuing operations before income taxes	81.1	111.6	24.8
Provision for income taxes	37.5	52.9	17.8
Earnings from continuing operations	43.6	58.7	7.0
Loss from discontinued operations, net of tax	(4.2)	(2.6)	(21.3)
Net income (loss)	$ 39.4	$ 56.1	$ (14.3)
Basic and diluted earnings (loss) per share of Class A and Common Stock
Earnings from continuing operations (in Dollars per share)	$ 1.31	$ 1.61	$ 0.19
Loss from discontinued operations (in Dollars per share)	$ (0.13)	$ (0.07)	$ (0.57)
Net income (loss) (in Dollars per share)	$ 1.18	$ 1.54	$ (0.38)
Diluted:
Earnings from continuing operations (in Dollars per share)	$ 1.29	$ 1.59	$ 0.19
Loss from discontinued operations (in Dollars per share)	$ (0.13)	$ (0.07)	$ (0.57)
Net income (loss) (in Dollars per share)	$ 1.16	$ 1.52	$ (0.38)
Dividends declared per common share (in Dollars per share)	$ 0.35	$ 0.30	$ 0.30