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Curtailment of Operations - Hawesville	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Curtailment of Operations - Hawesville	Curtailment of Operations - Hawesville In August 2022, we fully curtailed production at the Hawesville facility. We continue to explore all options related to the Hawesville facility. For the year ended December 31, 2024, we incurred curtailment charges of $6.8 million, These charges were partially offset by income related to scrap and materials sales of $0.5 million. Comparatively, for the year ended December 31, 2023, we incurred curtailment charges of $16.6 million, including $9.0 million related to demand capacity charges for power. These charges were partially offset by income related to scrap and material sales of $1.7 million.

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The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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-Paragraph 1
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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