Statement of Consolidated Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Sales	$ 1,433	$ 1,283	$ 4,150	$ 3,687
Cost of goods sold (exclusive of expenses below)	1,056	928	2,993	2,658
Selling, general administrative, and other expenses	73	70	225	190
Research and development expenses	7	4	23	13
Provision for depreciation and amortization	65	68	198	203
Restructuring and other charges	4	8	12	22
Operating income	228	205	699	601
Loss on debt redemption	0	118	2	141
Interest expense, net	57	63	172	201
Other expense, net	67	1	67	13
Income before income taxes	104	23	458	246
Provision (benefit) for income taxes	24	(4)	100	65
Net income	80	27	358	181
Amounts Attributable to Howmet Aerospace Common Shareholders:
Net income	79	26	356	179
Net income	$ 79	$ 26	$ 356	$ 179
Earnings per share:
Basic (in usd per share)	$ 0.19	$ 0.06	$ 0.86	$ 0.42
Diluted (in usd per share)	$ 0.19	$ 0.06	$ 0.84	$ 0.41
Average Shares Outstanding:
Basic (in shares)	415	429	417	431
Diluted (in shares)	420	434	422	437