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- Definition

Name of acquiree in business combination.

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- Definition

Percentage of voting equity interest acquired in business combination.

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Per share price of saleable stock paid or offered to be paid by acquirer in business combination.

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Amount of expense for acquisition-related cost incurred to effect business combination. Includes, but is not limited to, finder's fee; advisory, legal, accounting, valuation, and other professional and consulting fees; and general administrative cost, including cost of maintaining internal acquisition department.

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- Definition

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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- Details

Name:	us-gaap_BusinessAcquisitionAxis=ws_KloecknerCoSEMember
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Acquisitions - Additional Information (Detail) € / shares in Units, € in Millions							3 Months Ended
	Aug. 12, 2026 USD ($) shares	Aug. 12, 2026 EUR (€) shares	Jun. 15, 2026 USD ($)	Jun. 03, 2026 USD ($)	Jun. 03, 2025 USD ($)	Jun. 03, 2025 EUR (€)	Aug. 31, 2026 USD ($)	Aug. 31, 2025 USD ($)	Aug. 31, 2026 € / shares	Jul. 15, 2026 € / shares	Jun. 15, 2026 € / shares shares	Jun. 03, 2026 € / shares	May 31, 2026 USD ($)
Business Acquisition [Line Items]
Equity interest to fair value resulting in a loss							$ 15,500,000	$ 0
Goodwill							44,500,000						$ 44,500,000
Total purchase price to be paid, net of cash acquired							545,200,000	1,600,000
Net sales							2,726,600,000	872,900,000
Net earnings (loss)							(5,000,000)	38,600,000
Net earnings (loss) from continuing operations attributable to controlling interest							(7,000,000)	36,800,000
Sitem Group
Business Acquisition [Line Items]
Percentage of acquisition					52.00%	52.00%
Date of acquisition					Jun. 03, 2025	Jun. 03, 2025
Business acquisition, name of acquired entity					Sitem Group	Sitem Group
Acquisition-related expenses								$ 400,000
One time bonus paid to key individuals					$ 4,600,000	€ 4.0
Kloeckner
Business Acquisition [Line Items]
Cash consideration \| € / shares												€ 11
Cash Consideration				$ 670,000,000
Percentage of acquired ownership interest												52.52%
Percentage of acquisition	62.11%	62.11%									61.87%	60.86%
Date of acquisition				Jun. 03, 2026
Business acquisition, name of acquired entity				Kloeckner
Equity interest to fair value resulting in a loss				$ 15,500,000
Number of additional shares acquired \| shares	242,446	242,446									1,000,000
Price per share \| € / shares										€ 11	€ 11
Consideration for additional shares acquired	$ 3,200,000	€ 2.7	$ 12,700,000
Equity interest and noncontrolling interest measured price per share \| € / shares									€ 11
Goodwill							0
Bargain purchase gain							0
Contribution of Tempel's electrical steel facility in Nagold, Germany				$ 106,400,000
Acquisition-related expenses							22,600,000
Net sales							1,772,700,000
Net earnings (loss) from continuing operations attributable to controlling interest							$ 4,500,000