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Stock-Based Compensation (Tables)

9 Months Ended

Feb. 28, 2026

Share-Based Payment Arrangement [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The following table summarizes stock-based compensation expense included in Selling, general and administrative expenses for the periods indicated: 

			Three months ended																		Nine months ended
			February 28,									February 28,									February 28,									February 28,
			2026									2025									2026									2025
Stock option expense			$			0.1						$			0.2						$			0.6						$			1.0
Restricted stock unit expense						2.0									2.1									5.6									5.3
Management stock purchase plan						0.0									0.0									0.1									0.1
Employee stock purchase plan						0.1									0.1									0.3									0.3
Total stock-based compensation expense			$			2.2						$			2.4						$			6.6						$			6.7

Schedule of Shares Issued Pursuant to Share-based Compensation Activity

The following table sets forth Common Stock issued pursuant to stock-based compensation plans for the periods indicated:

			Three months ended												Nine months ended
			February 28,						February 28,						February 28,						February 28,
			2026						2025						2026						2025
Common Stock issued pursuant to stock-based compensation plans (in millions)			0.2						0.1						0.6						0.3

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- Definition

Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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-Section 50
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