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Description of Business and Basis of Presentation - Additional Information (Detail) $ in Millions		3 Months Ended		6 Months Ended
	Jun. 03, 2025	Nov. 30, 2025 USD ($) Jointventure	Nov. 30, 2024 USD ($)	Nov. 30, 2025 USD ($) Jointventure Segment	Nov. 30, 2024 USD ($)
Significant Accounting Policies [Line Items]
Impairment of assets		$ 0.6	$ 0.0	$ 0.6	$ 0.0
Lowered net asset value		0.5		$ 0.5
Pre-tax impairment charge		$ 0.6
Number of years of service				70 years
Number of operating segments \| Segment				1
Number of reportable segments \| Segment				1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]				srt:ChiefExecutiveOfficerMember
Sitem Group
Significant Accounting Policies [Line Items]
Percentage of capital stock issued and outstanding	52.00%
Joint Venture Transactions
Significant Accounting Policies [Line Items]
Number of operating joint ventures \| Jointventure		4		4
Serviacero Worthington
Significant Accounting Policies [Line Items]
Number of unconsolidated joint ventures \| Jointventure		1		1
Percent of ownership own a noncontrolling interest held in unconsolidated joint venture		50.00%		50.00%
Spartan \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		52.00%		52.00%
TWB \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		55.00%		55.00%
WSCP \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		63.00%		63.00%
WSP \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		51.00%		51.00%
Sitem Group \| Sitem Group
Significant Accounting Policies [Line Items]
Percentage of noncontrolling interest		48.00%		48.00%
Sitem Group \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company		52.00%		52.00%