Segment and Geographic Area Information - Disaggregation of Revenue by Major End Market Served (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Major Customer [Line Items]
Sales	$ 4,972	$ 5,259	$ 7,098
Third-party sales
Revenue, Major Customer [Line Items]
Sales	4,972	5,257	7,105
Third-party sales | Engine Products
Revenue, Major Customer [Line Items]
Sales	2,282	2,406	3,320
Third-party sales | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	1,044	1,245	1,561
Third-party sales | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	725	927	1,255
Third-party sales | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	921	679	969
Third-party sales | Aerospace - Commercial
Revenue, Major Customer [Line Items]
Sales	2,029	2,597	4,186
Third-party sales | Aerospace - Commercial | Engine Products
Revenue, Major Customer [Line Items]
Sales	1,105	1,247	2,229
Third-party sales | Aerospace - Commercial | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	537	808	1,060
Third-party sales | Aerospace - Commercial | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	387	542	897
Third-party sales | Aerospace - Commercial | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0	0
Third-party sales | Aerospace - Defense
Revenue, Major Customer [Line Items]
Sales	951	1,016	889
Third-party sales | Aerospace - Defense | Engine Products
Revenue, Major Customer [Line Items]
Sales	523	557	475
Third-party sales | Aerospace - Defense | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	158	156	158
Third-party sales | Aerospace - Defense | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	270	303	256
Third-party sales | Aerospace - Defense | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0	0
Third-party sales | Commercial Transportation
Revenue, Major Customer [Line Items]
Sales	1,129	834	1,217
Third-party sales | Commercial Transportation | Engine Products
Revenue, Major Customer [Line Items]
Sales	0	0	20
Third-party sales | Commercial Transportation | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	208	155	227
Third-party sales | Commercial Transportation | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	0	0	0
Third-party sales | Commercial Transportation | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	921	679	970
Third-party sales | Industrial and Other
Revenue, Major Customer [Line Items]
Sales	863	810	813
Third-party sales | Industrial and Other | Engine Products
Revenue, Major Customer [Line Items]
Sales	654	602	596
Third-party sales | Industrial and Other | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	141	126	116
Third-party sales | Industrial and Other | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	68	82	102
Third-party sales | Industrial and Other | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	$ 0	$ 0	$ (1)