Segment Information - Disaggregation of Revenue by Major End Market Served (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue, Major Customer [Line Items]
Sales	$ 1,942	$ 1,824
Engine Products
Revenue, Major Customer [Line Items]
Sales	996	885
Fastening Systems
Revenue, Major Customer [Line Items]
Sales	412	389
Engineered Structures
Revenue, Major Customer [Line Items]
Sales	282	262
Forged Wheels
Revenue, Major Customer [Line Items]
Sales	252	288
Aerospace - Commercial
Revenue, Major Customer [Line Items]
Sales	1,016	928
Aerospace - Commercial | Engine Products
Revenue, Major Customer [Line Items]
Sales	549	492
Aerospace - Commercial | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	275	244
Aerospace - Commercial | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	192	192
Aerospace - Commercial | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0
Aerospace - Defense
Revenue, Major Customer [Line Items]
Sales	333	280
Aerospace - Defense | Engine Products
Revenue, Major Customer [Line Items]
Sales	215	185
Aerospace - Defense | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	42	39
Aerospace - Defense | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	76	56
Aerospace - Defense | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	0	0
Commercial Transportation
Revenue, Major Customer [Line Items]
Sales	305	354
Commercial Transportation | Engine Products
Revenue, Major Customer [Line Items]
Sales	0	0
Commercial Transportation | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	53	66
Commercial Transportation | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	0	0
Commercial Transportation | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	252	288
Industrial and Other
Revenue, Major Customer [Line Items]
Sales	288	262
Industrial and Other | Engine Products
Revenue, Major Customer [Line Items]
Sales	232	208
Industrial and Other | Fastening Systems
Revenue, Major Customer [Line Items]
Sales	42	40
Industrial and Other | Engineered Structures
Revenue, Major Customer [Line Items]
Sales	14	14
Industrial and Other | Forged Wheels
Revenue, Major Customer [Line Items]
Sales	$ 0	$ 0