Revenue Recognition - Net contract assets and liabilities (Details - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2025	Aug. 31, 2024	Feb. 28, 2026	Feb. 28, 2025	Nov. 30, 2025	May 31, 2025	Nov. 30, 2024	May 31, 2024
Contract assets and liabilities
Contract assets - current			$ 142.3			$ 140.3
Contract assets - non-current			43.7			28.4
Contract liabilities:
Deferred revenue - current			(63.2)			(40.3)
Deferred revenue on long-term contracts			(24.5)			(6.4)
Net contract assets			98.3			122.0
Change in contract assets - current			2.0
Change in contract assets - non-current			15.3
Change in deferred revenue - current			(22.9)
Change in deferred revenue on long-term contracts			(18.1)
Change in net contract assets			(23.7)
Contract with Customer, Liability	$ 51.2		87.7	$ 51.2	$ 45.8	46.7	$ 29.6	$ 21.9
Change in contract assets and revenue			(14.2)	37.8
Accounts receivable, net			$ 426.2			$ 354.8
Impairment charges				63.0
Termination settlement proposal
Contract liabilities:
Contract assets with customer	13.5			$ 13.5
Termination amount for equipment and other costs	$ 1.0
U.S. Government Customer | Next Generation Pallet Contract
Contract liabilities:
Contract assets with customer		$ 9.5
Equipment and inventory expensed		$ 12.7