Business Combinations - New Process Steel Unaudited Pro Forma Results (Details) - New Process Steel LP - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended |
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Jun. 30, 2025 |
Jun. 30, 2025 |
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| Business Combination, Pro Forma Information [Line Items] | ||
| Net sales | $ 4,736,764 | $ 9,263,504 |
| Net income attributable to Steel Dynamics, Inc. | $ 300,397 | $ 518,256 |
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- 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
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- Details
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