Acquisition - Fair value of assets acquired and liabilities (Details) - USD ($) $ in Millions	Mar. 20, 2023	Feb. 29, 2024	May 31, 2023
Acquisition
Accounts receivable	$ 8.8
Other assets	3.0
Intangible assets	61.7
Deferred revenue	(4.1)
Deferred tax liabilities	(15.1)
Other liabilities	(4.6)
Net assets acquired	49.7
Goodwill	63.8	$ 179.4	$ 175.8
Purchase price, net of cash acquired	113.5
Trax USA Corp | Tradenames
Acquisition
Acquired indefinite-lived intangible assets	6.1
Trax USA Corp | Customer relationships
Acquisition
Acquired amortizable intangible assets	$ 33.6
Amortization period of intangible assets (in years)	12 years
Trax USA Corp | Developed technology
Acquisition
Acquired amortizable intangible assets	$ 22.0
Amortization period of intangible assets (in years)	20 years