Statement of Consolidated Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Sales (C)	$ 1,648	$ 1,393	$ 3,251	$ 2,717
Cost of goods sold (exclusive of expenses below)	1,196	987	2,360	1,937
Selling, general administrative, and other expenses	88	83	163	152
Research and development expenses	9	9	18	16
Provision for depreciation and amortization	67	67	136	133
Restructuring and other charges (D)	3	6	4	8
Operating income	285	241	570	471
Loss on debt redemption (N)	0	2	1	2
Interest expense, net	55	57	112	115
Other income, net (F)(P)	(13)	(1)	(6)	0
Income before income taxes	243	183	463	354
Provision for income taxes (G)	50	36	122	76
Net income	193	147	341	278
Amounts Attributable to Howmet Aerospace Common Shareholders (H):
Net income	193	147	340	277
Net income	$ 193	$ 147	$ 340	$ 277
Earnings per share:
Basic (in usd per share)	$ 0.47	$ 0.35	$ 0.82	$ 0.66
Diluted (in usd per share)	$ 0.46	$ 0.35	$ 0.81	$ 0.66
Average Shares Outstanding (H):
Basic (in shares)	413	417	413	418
Diluted (in shares)	417	422	417	423