Commitments and Contingencies (Details) $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Oct. 27, 2023 USD ($)	Aug. 31, 2025 USD ($)	Aug. 31, 2025 USD ($) a	Feb. 28, 2025 USD ($)
Loss Contingencies [Line Items]
Amount awarded to other party	$ 5.5
Estimated legal expenses		$ 1.3	$ 1.3
Environment liability		18.4	18.4
Environmental liability, current		$ 1.9	$ 1.9
Area of facility (in acres) | a			25
Percent of output under take-or-pay contract		0.75	0.75
Unrecorded purchase obligation		$ 121.8	$ 121.8
Purchase obligations			4.1	$ 113.6
Capital commitments		4.1	4.1
Accrued Professional Fees		1.2	1.2
TECO Case
Loss Contingencies [Line Items]
Loss contingency, receivable, current		5.2	$ 5.2
Legal matter expense		$ 6.5