CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Income Statement [Abstract]
Revenues	$ 604.7	$ 598.3	$ 823.1	$ 787.5
Operating costs and expenses:
Cost of goods sold	262.4	253.6	387.7	369.2
Selling, general and administrative expenses	229.7	227.7	393.4	387.2
Depreciation and amortization	14.4	9.8	27.6	19.0
Asset impairments	0.0	0.0	0.0	6.7
Total operating costs and expenses	506.5	491.1	808.7	782.1
Operating income (loss)	98.2	107.2	14.4	5.4
Interest income (expense), net	0.5	0.0	1.3	0.3
Other components of net periodic benefit (cost)	(0.3)	(15.5)	(0.7)	(15.6)
Earnings (loss) before income taxes	98.4	91.7	15.0	(9.9)
Provision (benefit) for income taxes	26.8	34.6	4.7	(3.3)
Net income (loss)	$ 71.6	$ 57.1	$ 10.3	$ (6.6)
Basic and diluted earnings (loss) per Share of Class A and Common Stock
Basic (in Dollars per share)	$ 2.03	$ 1.63	$ 0.29	$ (0.19)
Diluted (in Dollars per share)	1.99	1.60	0.29	(0.19)
Dividends declared per class A and common share (in Dollars per share)	$ 0.15	$ 0.15	$ 0.3	$ 0.30