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Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue Disaggregation
Revenues	$ 3,484.7	$ 3,644.8
Carbon steel
Revenue Disaggregation
Revenues	1,904.2	2,012.9
Aluminum
Revenue Disaggregation
Revenues	605.6	596.1
Stainless steel
Revenue Disaggregation
Revenues	503.2	559.9
Alloy
Revenue Disaggregation
Revenues	158.4	171.9
Toll processing and logistics
Revenue Disaggregation
Revenues	160.2	157.8
Copper and brass
Revenue Disaggregation
Revenues	81.7	75.3
Miscellaneous and eliminations
Revenue Disaggregation
Revenues	$ 71.4	$ 70.9

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