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RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 (Details) - Reliance, Inc. Master 401(k) Plan - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500    
Net assets available for benefits as reported on the Form 5500 $ 1,848,568,908 $ 1,653,223,283
Adjustment from fair market value per Trustee to NAV for the MIP 680,929 1,707,480
Net assets available for benefits 1,849,249,837 $ 1,654,930,763
Net income as reported on the Form 5500 158,604,006  
Investment, Adjustment from fair market value per Trustee to NAV for the MIP - Beginning of year (1,707,480)  
Investment, Adjustment from fair market value per Trustee to NAV for the MIP - End of year 680,929  
Net increase $ 157,577,455