Statement of Consolidated Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Sales (C)	$ 1,658	$ 1,433	$ 4,909	$ 4,150
Cost of goods sold (exclusive of expenses below)	1,183	1,056	3,543	2,993
Selling, general administrative, and other expenses	87	73	250	225
Research and development expenses	9	7	27	23
Provision for depreciation and amortization	68	65	204	198
Restructuring and other charges (D)	4	4	8	12
Operating income	307	228	877	699
Loss on debt redemption (N)	0	0	1	2
Interest expense, net	54	57	166	172
Other expense, net (F)	11	67	5	67
Income before income taxes	242	104	705	458
Provision for income taxes (G)	54	24	176	100
Net income	188	80	529	358
Amounts Attributable to Howmet Aerospace Common Shareholders (H):
Net income	187	79	527	356
Net income	$ 187	$ 79	$ 527	$ 356
Earnings per share:
Basic (in usd per share)	$ 0.45	$ 0.19	$ 1.28	$ 0.86
Diluted (in usd per share)	$ 0.45	$ 0.19	$ 1.27	$ 0.84
Average Shares Outstanding (H):
Basic (in shares)	412	415	412	417
Diluted (in shares)	415	420	417	422