Segment and Geographic Area Information - Schedule of Operating Results of Arconic's Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales (D)	$ 5,663	$ 4,972	$ 5,259
Segment operating profit	919	748	626
Restructuring and other charges	56	90	182
Provision for depreciation and amortization	265	270	279
Capital expenditures	193	199	267
Total assets	10,255	10,219
Third-party sales
Segment Reporting Information [Line Items]
Sales (D)	5,663	4,972	5,257
Inter-segment sales
Segment Reporting Information [Line Items]
Sales (D)	(10)	(10)	(12)
Total segment sales
Segment Reporting Information [Line Items]
Sales (D)	5,673	4,982	5,269
Segment operating profit	1,352	1,200	1,152
Segment Adjusted EBITDA	1,352	1,200	1,152
Restructuring and other charges	46	90	106
Provision for depreciation and amortization	258	261	262
Capital expenditures	178	182	158
Total assets	9,419	9,262	9,535
Engine Products | Third-party sales
Segment Reporting Information [Line Items]
Sales (D)	2,698	2,282	2,406
Engine Products | Inter-segment sales
Segment Reporting Information [Line Items]
Sales (D)	4	4	5
Engine Products | Total segment sales
Segment Reporting Information [Line Items]
Sales (D)	2,702	2,286	2,411
Segment Adjusted EBITDA	729	564	540
Restructuring and other charges	29	74	36
Provision for depreciation and amortization	125	124	123
Capital expenditures	94	74	77
Total assets	4,784	4,663	4,756
Fastening Systems | Third-party sales
Segment Reporting Information [Line Items]
Sales (D)	1,117	1,044	1,245
Fastening Systems | Inter-segment sales
Segment Reporting Information [Line Items]
Sales (D)	0	0	0
Fastening Systems | Total segment sales
Segment Reporting Information [Line Items]
Sales (D)	1,117	1,044	1,245
Segment Adjusted EBITDA	234	239	295
Restructuring and other charges	8	0	39
Provision for depreciation and amortization	45	49	48
Capital expenditures	39	42	39
Total assets	2,661	2,635	2,707
Engineered Structures | Third-party sales
Segment Reporting Information [Line Items]
Sales (D)	790	725	927
Engineered Structures | Inter-segment sales
Segment Reporting Information [Line Items]
Sales (D)	6	6	7
Engineered Structures | Total segment sales
Segment Reporting Information [Line Items]
Sales (D)	796	731	934
Segment Adjusted EBITDA	111	103	125
Restructuring and other charges	7	16	28
Provision for depreciation and amortization	48	49	52
Capital expenditures	17	21	19
Total assets	1,273	1,280	1,444
Forged Wheels | Third-party sales
Segment Reporting Information [Line Items]
Sales (D)	1,058	921	679
Forged Wheels | Inter-segment sales
Segment Reporting Information [Line Items]
Sales (D)	0	0	0
Forged Wheels | Total segment sales
Segment Reporting Information [Line Items]
Sales (D)	1,058	921	679
Segment Adjusted EBITDA	278	294	192
Restructuring and other charges	2	0	3
Provision for depreciation and amortization	40	39	39
Capital expenditures	28	45	23
Total assets	$ 701	$ 684	$ 628