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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2024
Revenue Recognition and Deferred Revenue [Abstract] |
Schedule of Disaggregation of revenue |
Net Sales |  | Three months ended June 30, |  | Six months ended June 30,
|  | 2024 |  | 2023 |  | 2024 |  | 2023
United States |  | $ | 375.0 |  |  | $ | 363.2 |  |  | $ | 675.0 |  |  | $ | 705.5 |
Iceland |  | 185.8 |  |  | 212.3 |  |  | 375.3 |  |  | 422.4 |
Total |  | $ | 560.8 |  |  | $ | 575.5 |  |  | $ | 1,050.3 |  |  | $ | 1,127.9 |
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 and six months ended June 30, 2024 and 2023.
Net Sales |  | Three months ended June 30, |  | Six months ended June 30, |  |
|  | 2024 |  | 2023 |  | 2024 |  | 2023 |  |
Aluminum |  | $ | 454.9 |  |  | $ | 509.7 |  |  | $ | 904.3 |  |  | $ | 1,041.1 |  |  |
Alumina |  | 105.9 |  |  | 65.8 |  |  | 146.0 |  |  | 86.8 |  |  |
Total |  | $ | 560.8 |  |  | $ | 575.5 |  |  | $ | 1,050.3 |  |  | $ | 1,127.9 |  |  |

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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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