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Revenue (Tables)

3 Months Ended

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 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

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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

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No definition available.

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