CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Income Statement [Abstract]
Revenues	$ 189.2	$ 282.7
Operating costs and expenses:
Cost of goods sold	115.6	169.7
Selling, general and administrative expenses	158.8	166.0
Depreciation and amortization	9.9	9.5
Asset impairments	6.7	0.0
Total operating costs and expenses	291.0	345.2
Operating income (loss)	(101.8)	(62.5)
Interest income (expense), net	0.3	(0.3)
Other components of net periodic benefit (cost)	(0.1)	(0.6)
Earnings (loss) from continuing operations before income taxes	(101.6)	(63.4)
Provision (benefit) for income taxes	(37.9)	(23.9)
Earnings (loss) from continuing operations	(63.7)	(39.5)
Earnings (loss) from discontinued operations, net of tax	0.0	(0.1)
Net income (loss)	$ (63.7)	$ (39.6)
Basic:
Earnings (loss) from continuing operations (in Dollars per share)	$ (1.81)	$ (1.15)
Earnings (loss) from discontinued operations, net of tax (in Dollars per share)	0.00	0.00
Net income (loss) (in Dollars per share)	(1.81)	(1.15)
Diluted:
Earnings (loss) from continuing operations (in Dollars per share)	(1.81)	(1.15)
Earnings (loss) from discontinued operations, net of tax (in Dollars per share)	0.00	0.00
Net income (loss) (in Dollars per share)	(1.81)	(1.15)
Dividends declared per class A and common share (in Dollars per share)	$ 0.15	$ 0.15