v3.26.1
Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Nov. 30, 2023
May 31, 2026
May 31, 2025
May 31, 2024
Numerator (basic & diluted):        
Net earnings attributable to controlling interest - income available to common shareholders   $ 8.5 $ 110.7 $ 154.7
Denominator:        
Basic earnings weighted average common shares   49,800,000 49,500,000 49,300,000
Effect of dilutive securities   1,000,000 1,000,000 500,000
Diluted earnings adjusted weighted average common shares   50,800,000 50,500,000 49,800,000
Basic earnings per common share attributable to Worthington Steel shareholders   $ 0.17 $ 2.24 $ 3.14
Diluted earnings per common share attributable to Worthington Steel shareholders   $ 0.17 $ 2.19 $ 3.11
Anti-dilutive non-qualified stock options and restricted common share awards 0 100,000 [1] 200,000 [1] 0 [1]
[1] These non-qualified stock options and restricted common share awards were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. There were no anti-dilutive non-qualified stock options and restricted common share awards prior to the Separation. The number of anti-dilutive non-qualified stock options and restricted common share awards for 2024 was less than 0.1 million.