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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following table provides disaggregated sales and other operating revenue by product or service, excluding intersegment revenues:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (Dollars in millions)
Sales and other operating revenue: |  |  |  |  |  |  |  |
Cokemaking |  | $ | 397.2 |  |  | $ | 429.3 |  |  | $ | 788.5 |  |  | $ | 876.0 |
Energy |  | 12.5 |  |  | 11.5 |  |  | 25.3 |  |  | 23.4 |
Logistics |  | 13.9 |  |  | 19.8 |  |  | 36.0 |  |  | 40.1 |
Operating and licensing fees |  | 8.6 |  |  | 9.1 |  |  | 16.4 |  |  | 17.4 |
Other |  | 1.9 |  |  | 1.2 |  |  | 3.9 |  |  | 2.4 |
Sales and other operating revenue |  | $ | 434.1 |  |  | $ | 470.9 |  |  | $ | 870.1 |  |  | $ | 959.3 |
The following tables provide disaggregated sales and other operating revenue by customer:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (Dollars in millions)
Sales and other operating revenue: |  |  |  |  |  |  |  |
Cliffs Steel |  | $ | 250.7 |  |  | $ | 286.9 |  |  | $ | 550.0 |  |  | $ | 604.2 |
U.S. Steel |  | 60.3 |  |  | 70.1 |  |  | 120.3 |  |  | 142.1 |
Other |  | 123.1 |  |  | 113.9 |  |  | 199.8 |  |  | 213.0 |
Sales and other operating revenue |  | $ | 434.1 |  |  | $ | 470.9 |  |  | $ | 870.1 |  |  | $ | 959.3 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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