v3.26.1
Fair Value Measurements - Schedule of Plan's Investment Assets at Fair Value on Recurring Basis (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 554,151,430 $ 489,340,962
Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 462,699,925 190,968,978
Worthington Steel common shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 16,381,756 15,402,920
Other Common Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   11,926,162
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 479,081,681 218,298,060
Level 1 | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 462,699,925 190,968,978
Level 1 | Worthington Steel common shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 16,381,756 15,402,920
Level 1 | Other Common Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   11,926,162
Level 1 | Common collective trust funds measured at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Worthington Steel common shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Other Common Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   0
Level 2 | Common collective trust funds measured at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Worthington Steel common shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Other Common Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   0
Level 3 | Common collective trust funds measured at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 1, Level 2, and Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 479,081,681 218,298,060
Investments Measured at NAV | Common collective trust funds measured at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 75,069,749 $ 271,042,902