Segment Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) integer customer	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting [Abstract]
Number Of Largest Customers | customer	2
Segment Revenues
Revenues	$ 6,047.9	$ 5,029.6	$ 3,953.0
Segment Operating Income
Business Segment Operating Income	193.1	48.4	(126.0)
Research and development	(45.4)	(50.4)	(53.3)
Operating loss	(134.2)	(281.2)	(459.2)
Textuals [Abstract]
Excess Capacity Costs- B737MAX and A320 Production Schedules	184.1	157.3
Restructuring Charges	$ 7.2	0.2	8.2
Number of Reportable Segments | integer	3
Selling, General and Administrative Expense	$ (281.9)	(279.2)	(279.9)
Other Nonrecurring Expense	8.3
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(2.4)	0.0	0.0
Commercial [Member]
Segment Revenues
Revenues	4,885.0	4,068.4	3,128.1
Segment Operating Income
Business Segment Operating Income	66.0	(82.9)	(220.6)
Textuals [Abstract]
Excess Capacity Costs- B737MAX and A320 Production Schedules	177.3	149.5	206.7
Abnormal Costs- COVID19 production suspension		9.6	12.0
Restructuring Charges	$ 6.3	0.2	6.8
Aviation Manufacturing Jobs Protection Program grant		(25.7)	(35.9)
Segment Reporting, Disclosure of Major Customers	Approximately 70%, 65%, and 60% of Commercial segment net revenues came from the Company's contracts with Boeing for the twelve months ended December 31, 2023, 2022, and 2021, respectively. Approximately 23%, 27%, and 30% of Commercial segment net revenues came from the Company's contracts with Airbus for the twelve months ended December 31, 2023, 2022, and 2021, respectively.
Charge related to suspension of activities due to sanctions		24.7
Other Nonrecurring Expense	$ 8.1
Defense & Space [Member]
Segment Revenues
Revenues	789.0	649.8	585.0
Segment Operating Income
Business Segment Operating Income	44.7	72.8	44.3
Textuals [Abstract]
Excess Capacity Costs- B737MAX and A320 Production Schedules	6.8	7.8	10.8
Restructuring Charges	$ 0.9	0.0	1.1
Aviation Manufacturing Jobs Protection Program grant		(2.3)	(3.0)
Segment Reporting, Disclosure of Major Customers	Approximately 34%, 34%, and 36% of Defense & Space segment net revenues came from the Company's contracts with an individual customer for the twelve months ended December 31, 2023, 2022, and 2021, respectively. In addition, a customer accounted for approximately 26%, 30%, and 39% of Defense & Space segment net revenues for the twelve months ended December 31, 2023, 2022, and 2021, respectively.
Other Nonrecurring Expense	$ 0.2
Aftermarket [Member]
Segment Revenues
Revenues	373.9	311.4	239.9
Segment Operating Income
Business Segment Operating Income	$ 82.4	58.5	50.3
Textuals [Abstract]
Restructuring Charges		0.0	0.3
Aviation Manufacturing Jobs Protection Program grant		(1.9)	$ (2.2)
Segment Reporting, Disclosure of Major Customers	Approximately 47%, 48%, and 44% of Aftermarket segment net revenues came from the Company's contracts with a single customer for the twelve months ended December 31, 2023, 2022, and 2021, respectively.
Charge related to suspension of activities due to sanctions		$ 4.4
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ (2.4)