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Revenue (Tables)

9 Months Ended

Sep. 30, 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 and nine months ended September 30, 2025 and 2024.

Net Sales						Three months ended September 30,												Nine months ended September 30,
						2025						2024						2025						2024
Aluminum						$	573.5					$	489.6					$	1,677.9					$	1,393.9
Alumina						58.7						49.5						216.3						195.5
Total						$	632.2					$	539.1					$	1,894.2					$	1,589.4

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:

Net Sales(1)						Three months ended September 30,												Nine months ended September 30,
						2025						2024						2025						2024
United States						$	435.8					$	336.3					$	1,241.4					$	1,011.2
Iceland						196.4						202.8						652.8						578.2
Total Net sales						$	632.2					$	539.1					$	1,894.2					$	1,589.4

(1)Includes sales of primary aluminum, scrap aluminum and alumina, and purchased aluminum and alumina.

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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
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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

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-Topic 280
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