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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2025
Revenue Recognition and Deferred Revenue [Abstract] |
Schedule of disaggregation of revenue | The table below shows the amount of net sales to external customers for each of the Company's product categories which accounted for 10% or more of consolidated net sales in either period for the three months ended March 31, 2025 and 2024.
Net Sales |  |  |  | Three months ended March 31,
|  |  |  |  |  | 2025 |  | 2024
Aluminum |  |  |  |  |  | $ | 535.8 |  |  | $ | 449.4 |
Alumina |  |  |  |  |  | 98.1 |  |  | 40.1 |
Total |  |  |  |  |  | $ | 633.9 |  |  | $ | 489.5 |
Schedule of revenue by geographic area | Our net sales are attributed to geographic area based on the location of the selling entity. Included in the consolidated financial statements are the following amounts related to geographic locations:
|  |  | Three months ended March 31,
|  |  |  |  | 2025 |  | 2024
Net sales: (1) |  |  |  |  |  |  |
United States |  |  |  |  | $ | 413.8 |  |  | $ | 300.0 |
Iceland |  |  |  |  | 220.1 |  |  | 189.5 |
Total Net sales |  |  |  |  | $ | 633.9 |  |  | $ | 489.5 |

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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