Inventory (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Summary Of Inventories [Abstract]
Raw materials	$ 468.7	$ 414.4
Work-in-process (1)	1,333.7	1,283.7
Finished goods	71.0	48.4
Product inventory	1,873.4	1,746.5
Capitalized pre-production	18.3	20.8
Total inventory, net	1,891.7	1,767.3
Inventory [Line Items]
Excess Capacity Costs- B737MAX and A320 Production Schedules	$ 196.5	184.1	$ 157.3
IAM Strike Production Pause
Inventory [Line Items]
Other Nonrecurring Expense		$ 8.3