Segment Information - Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 551.1	$ 544.6	$ 776.7	$ 781.8
Long-lived assets	124.3	471.8	124.3	471.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	440.6	430.6	582.3	580.3
Long-lived assets	89.7	438.9	89.7	438.9
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	110.5	114.0	194.4	201.5
Long-lived assets	$ 34.6	$ 32.9	$ 34.6	$ 32.9