Statement of Consolidated Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Sales (D)	$ 5,663	$ 4,972	$ 5,259
Cost of goods sold (exclusive of expenses below)	4,103	3,596	3,878
Selling, general administrative, and other expenses	288	251	277
Research and development expenses	32	17	17
Provision for depreciation and amortization	265	270	279
Restructuring and other charges	56	90	182
Operating income	919	748	626
Loss on debt redemption (R)	2	146	64
Interest expense, net (F)	229	259	317
Other expense, net (G)	82	19	74
Income from continuing operations before income taxes	606	324	171
Provision (benefit) for income taxes (I)	137	66	(40)
Net income from continuing operations attributable to common shareholders	469	258	211
Income from discontinued operations after income taxes (C)	0	0	50
Net income	469	258	261
Amounts Attributable to Howmet Aerospace Inc. Common Shareholders (K):
Net income	$ 467	$ 256	$ 259
Earnings per share - basic
Continuing operations (in usd per share)	$ 1.12	$ 0.60	$ 0.48
Discontinued operations (in usd per share)	0	0	0.11
Earnings per share - diluted
Continuing operations (in usd per share)	1.11	0.59	0.48
Discontinued operations (in usd per share)	$ 0	$ 0	$ 0.11
Average Shares Outstanding (J):
Average shares outstanding - basic (in shares)	416	430	435
Average shares outstanding - diluted (in shares)	421	435	439