Percentage of voting equity interest acquired in business combination.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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-Topic 944
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

Number of customers

+ References

No definition available.

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Balance Type:	na
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- Definition

Number of Joint Ventures

+ References

No definition available.

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Number of unconsolidated joint ventures.

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- Definition

Significant Accounting Policies [Line Items]

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Description of Business and Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Aug. 31, 2026 USD ($) Customer Jointventure	Aug. 31, 2025 USD ($) Customer	Aug. 12, 2026	Jun. 15, 2026	Jun. 03, 2026
Significant Accounting Policies [Line Items]
Number of customers \| Customer	0	2
Net Sales \| Customer Concentration Risk \| Customer One
Significant Accounting Policies [Line Items]
Percentage of Net sales		13.00%
Net Sales \| Customer Concentration Risk \| No Individual Customer
Significant Accounting Policies [Line Items]
Percentage of Net sales	10.00%
Net Sales \| Customer Concentration Risk \| Customer Two
Significant Accounting Policies [Line Items]
Percentage of Net sales		15.00%
Kloeckner
Significant Accounting Policies [Line Items]
Percentage of acquisition			62.11%	61.87%	60.86%
Joint Venture Transactions
Significant Accounting Policies [Line Items]
Number of operating joint ventures	4
Serviacero Worthington
Significant Accounting Policies [Line Items]
Number of unconsolidated joint ventures	1
Percent of ownership own a noncontrolling interest held in unconsolidated joint venture	50.00%
Distributions from unconsolidated affiliates \| $	$ 22,000,000	$ 0
Spartan \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	52.00%
TWB \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	55.00%
WSCP \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	63.00%
WSP \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	51.00%
Sitem Group \| Joint Venture Transactions
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	52.00%