Subsequent Events	6 Months Ended
Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	R. Subsequent Events On August 1, 2024, the Company completed the acquisition of Alumina Limited (see Note C). On July 31, 2024, the Board of Directors declared a quarterly cash dividend of $0.10 per share of the Company’s common stock and Series A convertible preferred stock, to be paid on August 29, 2024 to stockholders of record as of the close of business on August 12, 2024. Dividends on Alcoa’s common and preferred shares are paid in U.S. dollars. Dividends on CDIs paid in a currency other than U.S. dollar will be determined using foreign currency exchange rates as of August 22, 2024. In May 2022, the Company received a Notice of Violation (NOV) from the U.S. Environmental Protection Agency (the EPA). The NOV alleges violations under the Clean Air Act at the Company’s Intalco smelter from when the smelter was operational. The EPA referred the matter to the U.S. Department of Justice, Environment and Natural Resources Division (the DOJ) in May 2022. The DOJ and the Company agreed to a stipulated settlement, which was filed with the United States District Court for the Western District of Washington at Seattle on July 18, 2024, requiring the Company to pay a civil fine of $5. An accrual for this matter was included within Other current liabilities on the Consolidated Balance Sheet as of June 30, 2024.

Subsequent Events

6 Months Ended

Jun. 30, 2024

R. Subsequent Events

On August 1, 2024, the Company completed the acquisition of Alumina Limited (see Note C).

On July 31, 2024, the Board of Directors declared a quarterly cash dividend of $0.10 per share of the Company’s common stock and Series A convertible preferred stock, to be paid on August 29, 2024 to stockholders of record as of the close of business on August 12, 2024. Dividends on Alcoa’s common and preferred shares are paid in U.S. dollars. Dividends on CDIs paid in a currency other than U.S. dollar will be determined using foreign currency exchange rates as of August 22, 2024.

In May 2022, the Company received a Notice of Violation (NOV) from the U.S. Environmental Protection Agency (the EPA). The NOV alleges violations under the Clean Air Act at the Company’s Intalco smelter from when the smelter was operational. The EPA referred the matter to the U.S. Department of Justice, Environment and Natural Resources Division (the DOJ) in May 2022. The DOJ and the Company agreed to a stipulated settlement, which was filed with the United States District Court for the Western District of Washington at Seattle on July 18, 2024, requiring the Company to pay a civil fine of $5. An accrual for this matter was included within Other current liabilities on the Consolidated Balance Sheet as of June 30, 2024.