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Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	May 02, 2022 USD ($)	May 31, 2023 USD ($) Customer Facility Segment Jointventure	May 31, 2022 USD ($) Customer	May 31, 2021 USD ($)	Jun. 08, 2021
Significant Accounting Policies [Line Items]
Equity method investment, purchase price			$ 6,811,000
Separation costs		$ 24,048,000
Derivative financial instruments, credit losses		$ 0
Number of manufacturing facilities operated \| Facility		28
Number of reportable segments \| Segment		4
Allowance for doubtful accounts increase (decrease)		$ 2,091,000
Receivables, allowances		3,383,000	1,292,000
Depreciation Expenses		93,961,000	83,272,000	$ 74,779,000
Advertising Expenses		$ 29,537	$ 21,613	$ 17,462
Maximum
Significant Accounting Policies [Line Items]
Period allowed for payment of dues to customers			60 days
Maximum \| Building and Building Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life		40 years
Maximum \| Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life		20 years
Minimum
Significant Accounting Policies [Line Items]
Period allowed for payment of dues to customers			30 days
Minimum \| Building and Building Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life		10 years
Minimum \| Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life		3 years
Largest Customer
Significant Accounting Policies [Line Items]
Number of customers \| Customer		10	10
Sales Revenue, Net \| Product Concentration Risk \| Automotive Industries
Significant Accounting Policies [Line Items]
Concentration risk percentage		37.00%	37.00%	37.00%
Sales Revenue, Net \| Foreign Operations \| International Operations
Significant Accounting Policies [Line Items]
Concentration risk percentage		13.00%	6.00%	7.00%
Sales Revenue, Net \| Customer Concentration Risk \| Largest Customer
Significant Accounting Policies [Line Items]
Concentration risk percentage		12.00%
Sales Revenue, Net \| Customer Concentration Risk \| Largest Customer \| Maximum
Significant Accounting Policies [Line Items]
Concentration risk percentage			13.00%
Sales Revenue, Net \| Customer Concentration Risk \| Ten Largest Customers
Significant Accounting Policies [Line Items]
Concentration risk percentage		34.00%	34.00%
Net Assets, Geographic Area \| Foreign Operations \| International Operations
Significant Accounting Policies [Line Items]
Concentration risk percentage		10.00%	10.00%
Workforce Subject to Collective Bargaining Arrangements \| Labor Force Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage		15.00%
Workhorse
Significant Accounting Policies [Line Items]
Percent of ownership interest held in unconsolidated affiliates		20.00%
Worthington Taylor, LLC
Significant Accounting Policies [Line Items]
Percent of ownership interest held in unconsolidated affiliates	49.00%
Equity method investment, purchase price	$ 6,811,000
Joint Venture Transactions
Significant Accounting Policies [Line Items]
Number of joint ventures \| Jointventure		3
Number of manufacturing facilities operated \| Facility		44
Spartan \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		52.00%
TWB
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company					55.00%
TWB \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		55.00%
Samuel \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company			63.00%
Worthington Specialty Processing \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		51.00%