Receivables	12 Months Ended
Dec. 31, 2023
Receivables [Abstract]
Receivables	I. Receivables On January 31, 2023, a wholly-owned special purpose entity (SPE) of the Company entered into a one-year agreement with a financial institution to sell up to $150 of certain customer receivables without recourse on a revolving basis. On August 27, 2023, the Company amended the agreement to decrease the amount of certain receivables that can be transferred from $150 to $130. On November 15, 2023, the Company amended the agreement to extend the termination date from January 30, 2024 to November 14, 2024. Company subsidiaries sell customer receivables to the SPE, which then transfers the receivables to the financial institution. The Company does not maintain effective control over the transferred receivables, and therefore accounts for the transfers as sales of receivables. Alcoa Corporation guarantees the performance obligations of the Company subsidiaries and unsold customer receivables are pledged as collateral to the financial institution to secure the sold receivables. At December 31, 2023, the SPE held unsold customer receivables of $104 pledged as collateral against the sold receivables. The Company continues to service the customer receivables that were transferred to the financial institution. As Alcoa collects customer payments, the SPE transfers additional receivables to the financial institution rather than remitting cash. In 2023, the Company sold gross customer receivables of $591, and reinvested collections of $477 from previously sold receivables, resulting in net cash proceeds from the financial institution of $114. Cash collections from previously sold receivables yet to be reinvested of $99 were included in Accounts payable, trade on the accompanying Consolidated Balance Sheet as of December 31, 2023. Cash received from sold receivables under the agreement are presented within operating activities in the Statement of Consolidated Cash Flows.

Receivables

12 Months Ended

Dec. 31, 2023

I. Receivables

On January 31, 2023, a wholly-owned special purpose entity (SPE) of the Company entered into a one-year agreement with a financial institution to sell up to $150 of certain customer receivables without recourse on a revolving basis. On August 27, 2023, the Company amended the agreement to decrease the amount of certain receivables that can be transferred from $150 to $130. On November 15, 2023, the Company amended the agreement to extend the termination date from January 30, 2024 to November 14, 2024. Company subsidiaries sell customer receivables to the SPE, which then transfers the receivables to the financial institution. The Company does not maintain effective control over the transferred receivables, and therefore accounts for the transfers as sales of receivables.

Alcoa Corporation guarantees the performance obligations of the Company subsidiaries and unsold customer receivables are pledged as collateral to the financial institution to secure the sold receivables. At December 31, 2023, the SPE held unsold customer receivables of $104 pledged as collateral against the sold receivables.

The Company continues to service the customer receivables that were transferred to the financial institution. As Alcoa collects customer payments, the SPE transfers additional receivables to the financial institution rather than remitting cash. In 2023, the Company sold gross customer receivables of $591, and reinvested collections of $477 from previously sold receivables, resulting in net cash proceeds from the financial institution of $114. Cash collections from previously sold receivables yet to be reinvested of $99 were included in Accounts payable, trade on the accompanying Consolidated Balance Sheet as of December 31, 2023. Cash received from sold receivables under the agreement are presented within operating activities in the Statement of Consolidated Cash Flows.