Statement of Consolidated Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Sales (C)	$ 1,824	$ 1,603
Cost of goods sold (exclusive of expenses below)	1,290	1,164
Selling, general administrative, and other expenses	88	75
Research and development expenses	10	9
Provision for depreciation and amortization	67	69
Restructuring and other charges (D)	0	1
Operating income	369	285
Loss on debt redemption (N)	0	1
Interest expense, net	49	57
Other expense, net (F)	17	7
Income before income taxes	303	220
Provision for income taxes (G)	60	72
Net income	243	148
Amounts Attributable to Howmet Aerospace Common Shareholders (H):
Net income	242	147
Net income	$ 242	$ 147
Earnings per share:
Basic (in usd per share)	$ 0.59	$ 0.36
Diluted (in usd per share)	$ 0.59	$ 0.35
Average Shares Outstanding (H):
Basic (in shares)	410	412
Diluted (in shares)	412	418