v3.24.1.u1
Inventory (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 28, 2024
Mar. 30, 2023
Dec. 31, 2023
Summary Of Inventories [Abstract]      
Raw materials $ 423.7   $ 414.4
Work-in-process 1,300.5   1,283.7
Finished goods 53.0   48.4
Product inventory 1,777.2   1,746.5
Capitalized pre-production 20.3   20.8
Total inventory, net 1,797.5   1,767.3
Inventory Valuation Reserves 154.6   150.2
Costs Incurred in Anticipation of Contracts 232.4   $ 262.0
Excess Capacity Costs- B737MAX and A320 Production Schedules 26.1 $ 43.3  
Inventories [Line Items]      
Excess Capacity Costs- B737MAX and A320 Production Schedules $ 26.1 $ 43.3