Statement of Consolidated Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Sales (C)	$ 1,942	$ 1,824
Cost of goods sold (exclusive of expenses below)	1,290	1,290
Selling, general administrative, and other expenses	85	88
Research and development expenses	8	10
Provision for depreciation and amortization	69	67
Restructuring and other (credits) charges (D)	(4)	0
Operating income	494	369
Interest expense, net	39	49
Other expense, net (F)	9	17
Income before income taxes	446	303
Provision for income taxes (G)	102	60
Net income	344	243
Amounts Attributable to Howmet Aerospace Common Shareholders (H):
Net income, Basic	343	242
Net income, Diluted	$ 343	$ 242
Earnings per share:
Basic (in usd per share)	$ 0.85	$ 0.59
Diluted (in usd per share)	$ 0.84	$ 0.59
Average Shares Outstanding (H):
Basic (in shares)	405	410
Diluted (in shares)	407	412