Segment and Geographic Area Information - Schedule of Segment Operating Profit to Consolidated Net Income (Loss) Income Attributable to Arconic (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA	$ 919	$ 748	$ 626
Loss on debt redemption	(2)	(146)	(64)
Interest expense, net	(229)	(259)	(317)
Other expense, net (V)	(82)	(19)	(74)
Income from continuing operations before income taxes	606	324	171
Total segment sales
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA	1,352	1,200	1,152
Other Depreciation and Amortization	(258)	(261)	(262)
Restructuring and other charges
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA	(56)	(90)	(182)
Corporate expense
Segment Reporting Information [Line Items]
Total Segment Adjusted EBITDA	$ (119)	$ (101)	$ (82)