Legal Proceedings (Details) $ in Millions					3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 19, 2024 USD ($)	Oct. 11, 2024 USD ($)	Sep. 26, 2023 USD ($)	Mar. 03, 2023 USD ($)	Nov. 30, 2024 USD ($)	Aug. 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Nov. 30, 2024 USD ($)	May 31, 2017 engine	May 31, 2016 engine	Jul. 11, 2024 USD ($)	May 31, 2023 USD ($)
Legal Proceedings
Loss contingency, loss recognized in period						$ 11.2	$ 1.8
Number of engines purchased | engine									4	4
Russian court awarded to other party in judgement			$ 13.0	$ 1.8
Fair market value of engines at the time of sale					$ 13.0			$ 13.0
Expected loss from Judgement											$ 13.0
Loss contingency liability recognized		$ 13.0			13.0			13.0
Customer filed suit against claiming damages												$ 32.0
Amount appealed		1.8		$ 1.8
Reversal of damages sought value		$ 11.2
Total amount payable					55.6
Litigation settlement					$ 0.9			$ 0.9
Period of sentence in prison								1 year 6 months
Subsequent Event
Legal Proceedings
Penalty expense	$ 26.3
Forfeiture of penalty expense paid	18.6
Payments for legal settlements	23.5
Payments for interest on legal settlements	$ 5.8