Segment Information - Disaggregation of Revenue by Major End Market Served (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Major Customer [Line Items]
Sales	$ 1,603	$ 1,324
Third-party sales
Revenue, Major Customer [Line Items]
Sales	1,603	1,324
Third-party sales | Engine Products
Revenue, Major Customer [Line Items]
Sales	795	631
Third-party sales | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	312	264
Third-party sales | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	207	182
Third-party sales | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	289	247
Third-party sales | Aerospace - Commercial
Revenue, Major Customer [Line Items]
Sales	754	586
Third-party sales | Aerospace - Commercial | Engine Products
Revenue, Major Customer [Line Items]
Sales	432	329
Third-party sales | Aerospace - Commercial | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	170	148
Third-party sales | Aerospace - Commercial | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	152	109
Third-party sales | Aerospace - Commercial | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0
Third-party sales | Aerospace - Defense
Revenue, Major Customer [Line Items]
Sales	251	226
Third-party sales | Aerospace - Defense | Engine Products
Revenue, Major Customer [Line Items]
Sales	163	137
Third-party sales | Aerospace - Defense | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	44	32
Third-party sales | Aerospace - Defense | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	44	57
Third-party sales | Aerospace - Defense | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0
Third-party sales | Commercial Transportation
Revenue, Major Customer [Line Items]
Sales	352	300
Third-party sales | Commercial Transportation | Engine Products
Revenue, Major Customer [Line Items]
Sales	0	0
Third-party sales | Commercial Transportation | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	63	53
Third-party sales | Commercial Transportation | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	0	0
Third-party sales | Commercial Transportation | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	289	247
Third-party sales | Industrial and Other
Revenue, Major Customer [Line Items]
Sales	246	212
Third-party sales | Industrial and Other | Engine Products
Revenue, Major Customer [Line Items]
Sales	200	165
Third-party sales | Industrial and Other | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	35	31
Third-party sales | Industrial and Other | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	11	16
Third-party sales | Industrial and Other | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	$ 0	$ 0