Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2012
Income Statement [Abstract]
Revenues	$ 1,822.3	$ 1,792.4	$ 2,139.1
Operating costs and expenses:
Cost of goods sold	846.0	829.6	984.6
Selling, general and administrative expenses	812.5	815.0	878.5
Depreciation and amortization	61.4	66.5	68.8
Severance	11.3	13.4	14.9
Loss on leases and asset impairments	28.0	0	7.0
Total operating costs and expenses	1,759.2	1,724.5	1,953.8
Operating income	63.1	67.9	185.3
Interest income	0.6	1.2	1.0
Interest expense	(7.5)	(15.7)	(16.5)
Loss on investments and other	(5.8)	0	(0.1)
Earnings (loss) from continuing operations before income taxes	50.4	53.4	169.7
Provision (benefit) for income taxes	6.1	17.6	61.6
Earnings (loss) from continuing operations	44.3	35.8	108.1
Earnings (loss) from discontinued operations, net of tax	0.1	(4.7)	(5.7)
Net income (loss)	$ 44.4	$ 31.1	$ 102.4
Basic:
Earnings (loss) from continuing operations (in Dollars per share)	$ 1.38	$ 1.12	$ 3.45
Earnings (loss) from discontinued operations (in Dollars per share)	$ 0.01	$ (0.15)	$ (0.18)
Net income (loss) (in Dollars per share)	$ 1.39	$ 0.97	$ 3.27
Diluted:
Earnings (loss) from continuing operations (in Dollars per share)	$ 1.36	$ 1.10	$ 3.39
Earnings (loss) from discontinued operations (in Dollars per share)	$ 0.00	$ (0.15)	$ (0.18)
Net income (loss) (in Dollars per share)	$ 1.36	$ 0.95	$ 3.21
Dividends declared per common share (in Dollars per share)	$ 0.575	$ 0.50	$ 0.45