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v3.22.4

Employee Benefits - Supplemental Bonus Plan (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | $ 45.6 | $ 43.0 | $ 53.0
Master 401(k) Plan |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | 28.1 | 25.6 | 21.2
Precision Strip Retirement and Savings Plan |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | 9.2 | 8.0 | 5.2
Supplemental Executive Retirement Plans |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | 4.0 | 3.4 | 10.5
Deferred Compensation Plan |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | 2.0 | 2.5 | (0.3)
Other Defined Contribution Plans |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | 2.0 | 2.0 | 1.7
Defined Benefit Plans |  |  |
Contributions to Company Sponsored Retirement Plans |  |  |
Company's expense for Reliance-sponsored retirement plans | $ 0.3 | $ 1.5 | $ 14.7

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