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Restructuring and Other Charges, Net - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Noncurrent portion of the reserve	$ 15	$ 3
Alcoa Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Noncurrent portion of the reserve	$ 15	$ 3

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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