Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Income Statement [Abstract]
Revenues	$ 1,672.8	$ 1,635.8	$ 1,561.5
Operating costs and expenses:
Cost of goods sold	762.3	758.5	725.0
Selling, general and administrative expenses	777.7	771.1	727.3
Depreciation and amortization	38.9	47.9	60.3
Severance	11.9	9.6	10.5
Asset impairments	14.4	15.8	28.0
Total operating costs and expenses	1,605.2	1,602.9	1,551.1
Operating income	67.6	32.9	10.4
Interest income	1.1	0.3	0.6
Interest expense	(2.2)	(3.8)	(7.5)
Gain (loss) on investments and other	(2.2)	(0.5)	5.8
Earnings (loss) from continuing operations before income taxes	68.7	29.9	(2.3)
Provision (benefit) for income taxes	24.7	14.4	(15.6)
Earnings (loss) from continuing operations	44.0	15.5	13.3
Earnings (loss) from discontinued operations, net of tax	(3.5)	279.1	31.1
Net income (loss)	$ 40.5	$ 294.6	$ 44.4
Basic:
Earnings (loss) from continuing operations (in Dollars per share)	$ 1.29	$ 0.47	$ 0.42
Earnings (loss) from discontinued operations (in Dollars per share)	(0.11)	8.53	0.97
Net income (loss) (in Dollars per share)	1.18	9.00	1.39
Diluted:
Earnings (loss) from continuing operations (in Dollars per share)	1.26	0.46	0.41
Earnings (loss) from discontinued operations (in Dollars per share)	(0.10)	8.34	0.95
Net income (loss) (in Dollars per share)	1.16	8.80	1.36
Dividends declared per common share (in Dollars per share)	$ 0.6	$ 0.6	$ 0.575