Capital Stock and Stock-Based Awards (Tables)

12 Months Ended

May 31, 2022

Share-based Payment Arrangement [Abstract]

Schedule of capital stock

Capital stock consisted of the following as of May 31, 2022:

	Class A Stock	Common Stock	Preferred Stock
Authorized	4,000,000	70,000,000	2,000,000
Reserved for Issuance	—	9,007,196	—
Outstanding	1,656,200	32,469,019	—

Schedule of share-based compensation activity

The following table sets forth the intrinsic value of stock options exercised, pretax stock-based compensation cost and related tax benefits for the Company's equity plans for the fiscal years ended May 31:

	2022		2021		2020
Total intrinsic value of stock options exercised	$	5.1	$	0.1	$	0.2
Total stock-based compensation cost (pretax)		7.8		6.6		3.8
Tax benefits (shortfalls) related to stock-based compensation cost		2.3		(3.7)		(0.5)
Weighted average grant date fair value per option	$	8.04	$	3.80	$	6.99

Schedule of stock option activity

The following table sets forth the stock option activity under the Company's equity plans for the fiscal year ended May 31, 2022:

	Options		Weighted Average Exercise Price		Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in millions)
Outstanding at May 31, 2021		4,987,262	$	29.73
Granted		439,074		34.36
Exercised		(634,445)		27.86
Expired, canceled and forfeited		(152,202)		22.74
Outstanding at May 31, 2022		4,639,689	$	30.65		4.9	$	37.1
Exercisable at May 31, 2022		2,615,695	$	35.12		4.3	$	10.9

Schedule of restricted stock unit activity

The following table sets forth the restricted stock unit award activity for the fiscal years ended May 31:

		2022		2021		2020
Granted		178,461		137,106		34,632
Weighted average grant date price per unit	$	34.45	$	21.24	$	32.56

The following table sets forth the MSPP RSUs activity for the fiscal years ended May 31:

		2022		2021		2020
MSPP RSUs allocated		33,761		5,665		3,843
Purchase price per unit	$	24.67	$	16.88	$	24.36

Schedule of nonvested restricted stock unit activity

The following table sets forth the restricted stock unit and MSPP RSUs activity for the year ended May 31, 2022:

	Restricted stock units and MSPP RSUs		Weighted Average grant date fair value
Nonvested as of May 31, 2021	217,098	$	22.80
Granted	212,222		30.23
Vested	(139,891)		19.67
Forfeited	(1,370)		32.85
Nonvested as of May 31, 2022	288,059	$	29.61

Schedule of employee stock purchase plan activity

The following table sets forth the ESPP share activity for the fiscal years ended May 31:

		2022		2021		2020
Shares issued		59,322		67,097		65,714
Weighted average purchase price per share	$	32.52	$	22.19	$	27.84