v3.25.2
Long-Term Debt - Long-Term Debt (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Unamortized debt issuance costs and discounts $ (2.7) $ (3.3)
Total debt 510.2 467.4
Less: Short-term foreign debt 1.4 0.7
Total long-term debt 508.8 466.7
Ryerson Credit Facility [Member]    
Debt Instrument [Line Items]    
Ryerson Credit Facility 511.5 470.0
Foreign Debt [Member]    
Debt Instrument [Line Items]    
Foreign debt $ 1.4 $ 0.7