CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total Equity	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at May. 31, 2016	$ 865.8	$ 44.9	$ 451.3	$ 681.6	$ (267.6)	$ (44.4)
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Net income	56.5			56.5			$ 56.5
Cash dividends	(10.2)			(10.2)
Stock option activity	12.0		3.1		8.9
Restricted stock activity	5.4	0.3	6.4		(1.3)
Repurchase of shares	(19.8)				(19.8)
Other comprehensive income (loss), net of tax	4.5					4.5	4.5
Balance at May. 31, 2017	914.2	45.2	460.8	727.9	(279.8)	(39.9)
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Net income	15.6			15.6			15.6
Cash dividends	(10.3)			(10.3)
Stock option activity	12.1		0.9		11.2
Restricted stock activity	9.9	0.1	8.8		1.0
Repurchase of shares	(13.1)				(13.1)
Other comprehensive income (loss), net of tax	7.9					7.9	7.9
Balance at May. 31, 2018	936.3	45.3	470.5	733.2	(280.7)	(32.0)	936.3
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Net income	7.5			7.5			7.5
Cash dividends	(10.5)			(10.5)
Stock option activity	7.6		3.5		4.1
Restricted stock activity	4.6		5.4		(0.8)
Repurchase of shares	(10.3)				(10.3)
Other comprehensive income (loss), net of tax	(8.9)					(8.9)	(8.9)
Balance at May. 31, 2019	905.9	$ 45.3	$ 479.4	709.8	$ (287.7)	$ (40.9)	$ 905.9
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Cumulative effect adjustment upon adoption of ASC 606 on June 1, 2018 | ASU 2014-09	$ (20.4)			$ (20.4)