Acquisitions - Summary of Pro Forma Information (Details) - Kloeckner - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | |
|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
|
| Business Combination, Pro Forma Information [Line Items] | ||
| Net Sales | $ 2,726.6 | $ 2,516.8 |
| Net earnings attributable to Worthington Steel from continuing operations | $ 23.1 | $ (12.0) |
| Diluted earnings per share attributable to Worthington Steel shareholders | $ 0.46 | $ (0.24) |
| X | ||||||||||
- Definition Per diluted share amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|