Summary of Significant Accounting Policies - Intangibles assets (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Amortizable intangible assets:
Gross carrying amount	$ 241.5	$ 62.5
Accumulated Amortization	13.3	6.0
Net carrying amount	228.2	56.5
Intangible assets, gross	248.7	69.7
Intangible assets, net	235.4	63.7
Amortization expense	7.3	1.3	$ 1.1
Estimated aggregate amortization expense for intangible assets in each of the next five fiscal years
2025	16.2
2026	16.3
2027	16.3
2028	16.3
2029	15.8
Customer relationships
Amortizable intangible assets:
Gross carrying amount	136.2	40.5
Accumulated Amortization	11.0	5.8
Net carrying amount	125.2	34.7
Developed technology
Amortizable intangible assets:
Gross carrying amount	105.3	22.0
Accumulated Amortization	2.3	0.2
Net carrying amount	$ 103.0	$ 21.8
Minimum
Amortizable intangible assets:
Useful life	12 years
Maximum
Amortizable intangible assets:
Useful life	20 years