NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ in Millions	12 Months Ended				44 Months Ended
	Aug. 31, 2026 USD ($) mill	Aug. 31, 2025 USD ($)	Aug. 31, 2024 USD ($)	Aug. 31, 2023 USD ($)	Aug. 31, 2026 USD ($) mill
Property, Plant, and Equipment [Line Items]
Number Of Electric Arc Furnace Mini Mills \| mill	6				6
Number Of Electric Arc Furnace Micro Mills \| mill	4				4
Number of rerolling mills \| mill	1				1
Realized and unrealized gain (loss) on investment and foreign currency	$ 1.5	$ 9.8	$ 7.7
West Virginia Economic Development Authority
Property, Plant, and Equipment [Line Items]
Agreement For Performance Based Principal Reduction Loan			75.0
Proceeds From Performance Based Principal Reduction Loan	15.0	50.0		$ 5.0	$ 70.0
Poland Compensation Scheme Act
Property, Plant, and Equipment [Line Items]
Proceeds From Government Grants Related To Income	$ 36.0	74.7	29.2
Energy Aid Program, 2022
Property, Plant, and Equipment [Line Items]
Proceeds From Government Grants Related To Income		$ 4.0	$ 40.2
Receivables secured by credit insurance or letters of credit
Property, Plant, and Equipment [Line Items]
Percentage of accounts receivable secured by credit insurance or letters of credit	13.00%	15.00%			13.00%