Statement of Consolidated Operations (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Sales (E)	$ 3,644	$ 2,833	$ 6,937	$ 5,703
Cost of goods sold (exclusive of expenses below)	2,767	2,156	4,948	4,448
Selling, general administrative, and other expenses	52	54	96	106
Research and development expenses	7	6	16	13
Provision for depreciation, depletion, and amortization	161	161	321	343
Restructuring and other charges, net (D)	(75)	33	50	40
Interest expense	30	67	55	109
Other income, net (Q)	(206)	(105)	(220)	(129)
Total costs and expenses	2,736	2,372	5,266	4,930
Income before income taxes	908	461	1,671	773
Provision for income taxes	234	111	444	204
Net income	674	350	1,227	569
Less: Net income attributable to noncontrolling interest	125	41	209	85
NET INCOME ATTRIBUTABLE TO ALCOA CORPORATION	$ 549	$ 309	$ 1,018	$ 484
EARNINGS PER SHARE ATTRIBUTABLE TO ALCOA CORPORATION COMMON SHAREHOLDERS (F):
Basic	$ 3.01	$ 1.66	$ 5.55	$ 2.60
Diluted	$ 2.95	$ 1.63	$ 5.44	$ 2.56