Statement of Consolidated Operations (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Sales (E)	$ 3,293	$ 2,870
Cost of goods sold (exclusive of expenses below)	2,181	2,292
Selling, general administrative, and other expenses	44	52
Research and development expenses	9	7
Provision for depreciation, depletion, and amortization	160	182
Restructuring and other charges, net (D)	125	7
Interest expense	25	42
Other income, net (P)	(14)	(24)
Total costs and expenses	2,530	2,558
Income before income taxes	763	312
Provision for income taxes	210	93
Net income	553	219
Less: Net income attributable to noncontrolling interest	84	44
NET INCOME ATTRIBUTABLE TO ALCOA CORPORATION	$ 469	$ 175
EARNINGS PER SHARE ATTRIBUTABLE TO ALCOA CORPORATION COMMON SHAREHOLDERS (F):
Basic	$ 2.54	$ 0.94
Diluted	$ 2.49	$ 0.93