Stock-Based Compensation - Summary of Activity for Service-Based Restricted Common Shares (Detail) - Service-Based Restricted Common Shares - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
May 31, 2025 |
May 31, 2024 |
May 31, 2023 |
|||
| Restricted Common Shares | |||||
| Outstanding, beginning of year | 574,832 | 800,400 | 649,300 | ||
| Converted to Worthington Steel common shares | [1] | (296,100) | |||
| Separation related adjustment | 219,460 | ||||
| Granted | 307,745 | 217,915 | 358,500 | ||
| Vested | (289,772) | (344,870) | (184,241) | ||
| Forfeited | (14,102) | (21,973) | (23,159) | ||
| Outstanding, end of year | 578,703 | 574,832 | 800,400 | ||
| Weighted Average Grant Date Fair Value | |||||
| Outstanding, beginning of year | $ 36.43 | $ 47.39 | $ 44.12 | ||
| Converted to Worthington Steel common shares | [1] | 51.46 | |||
| Granted | 45.17 | 64.45 | 49.89 | ||
| Vested | 36.16 | 39.22 | 40.52 | ||
| Forfeited | 38.64 | 45.65 | 48.94 | ||
| Outstanding, end of year | $ 41.15 | $ 36.43 | $ 47.39 | ||
| Weighted Average Remaining Contractual Life (in years) | |||||
| Weighted average remaining contractual life of outstanding restricted common shares (in years) | 1 year 2 months 8 days | 1 year 1 month 17 days | 1 year 3 months 10 days | ||
| Aggregate intrinsic value | |||||
| Aggregate intrinsic value of outstanding restricted common shares | $ 34,091 | $ 32,783 | $ 44,926 | ||
| Aggregate intrinsic value of restricted common shares vested during the year | $ 12,744 | $ 21,708 | $ 8,897 | ||
| |||||
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options. No definition available.
|
| X | ||||||||||
- Definition Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options. No definition available.
|
| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, converted to common shares. No definition available.
|
| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, converted to common shares, weighted average grant date fair value. No definition available.
|
| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, separation related adjustment. No definition available.
|
| X | ||||||||||
- Details
|