Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change In Estimate [Line Items]
Change In Accounting Estimate, aggregate, affecting earnings from continuing operations	$ (320.9)	$ (278.0)	$ (246.5)
Changes in Accounting Estimates - Contract Accounting, aggregate, Affecting earnings from Continuing Operations, per Share diluted	$ (3.12)	$ (2.68)	$ (2.29)
Change in Accounting Estimate, Description	Changes in Estimates The Company has a periodic forecasting process in which management assesses the progress and performance of the Company’s programs. This process requires management to review each program’s progress by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated revenues and costs for the accounting contracts (and options if applicable), and any outstanding contract matters. Risks and opportunities include but are not limited to management’s judgment about the cost associated with the Company’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product), and any other program requirements. Due to the span of years it may take to completely satisfy the performance obligations for the accounting contracts (and options, if any) and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs is subject to many variables and, accordingly, is subject to change based upon judgment. The Company’s estimate of costs depends on maintaining continuing, uninterrupted production at its manufacturing facilities and its suppliers’ facilities. Interruptions in deliveries of or increased prices for components or raw materials used in the Company's products could delay production and/or materially adversely affect the Company's business. When adjustments in estimated total consideration or estimated total cost are required, any changes from prior estimates for fully satisfied performance obligations are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. Cumulative catch-up adjustments are primarily related to changes in the estimated margin of contracts with performance obligations that are satisfied over time.Changes in estimates could materially affect the Company’s future financial performance. Other than certain increases in raw material costs that can generally be passed on to the Company’s customers, in most instances the Company must fully absorb cost overruns. Some of the factors that may cause the costs incurred in fulfilling contracts to vary substantially from current estimates are technical problems, production rate changes, materials shortages, supplier difficulties, realization targets, existence of and execution to recovery plans caused by these factors, and multiple other events, including those identified in Item 1A. "Risk Factors". The risk particularly applies to products such as the B787, A220, and A350, which are in forward loss positions.Changes in estimates are summarized below:Changes in EstimatesDecember 31, 2023December 31, 2022December 31, 2021(Unfavorable) Favorable Cumulative Catch-up Adjustments by SegmentCommercial$(45.6)$(30.1)$(5.7)Defense & Space(10.6)2.4 0.7 Aftermarket— — — Total (Unfavorable) Favorable Cumulative Catch-up Adjustment$(56.2)$(27.7)$(5.0)(Forward Loss) and Changes in Estimates on Loss Programs by SegmentCommercial$(234.0)$(243.9)$(227.3)Defense & Space(30.7)(6.4)(14.2)Aftermarket— — — Total (Forward Loss) and Change in Estimate on Loss Program$(264.7)$(250.3)$(241.5)Total Change in Estimate$(320.9)$(278.0)$(246.5)EPS Impact (diluted per share based on statutory tax rate)$(3.12)$(2.68)$(2.29)2023 Changes in EstimatesDuring the twelve months ended December 31, 2023, the Company recognized unfavorable change in estimates of $320.9, including forward loss charges of $470.3 and unfavorable cumulative catch-up adjustments of $56.2, partially offset by a reversal of forward loss charges of ($205.6) on the B787 resulting from the execution of the 2023 MOA, resulting in a net $264.7 of forward loss charges in 2023. The forward loss charges were primarily driven by labor and production cost growth, higher supply chain costs, and schedule revisions on the A350 program and additional labor, the impact of the IAM agreement and supply chain cost growth on the B787 program, increased factory performance and supply chain costs on the B767, higher production, labor and supply chain costs on the A220 program, and production costs incurred including the impact of the IAM agreement on the Sikorsky CH-53K program. The forward losses on the Airbus A220 program include net incremental losses for anticipated performance obligations beyond 2025 of $12.0 in total. Unfavorable cumulative catch-up adjustments of $56.2 were primarily recognized on the B737 MAX and A320 programs, reflective of increased supply chain, raw material, factory performance and other costs on the program including the impact of the IAM union negotiations on the B737 MAX program. The A320 program unfavorable cumulative catch-up adjustment was driven by production cost overruns experienced due to operational and supply chain disruptions, and foreign currency movements. 2022 Changes in EstimatesDuring the twelve months ended December 31, 2022, the Company recognized net forward loss charges of $250.3 primarily driven by increased cost estimates for production rate decreases and build schedule changes, supply chain costs, costs of rework, and other costs on the B787 program, and additional labor, freight, and other cost requirements driven by parts shortages and production and quality issues, production schedule changes received from Airbus, increased freight and utility costs, and increased non-recurring engineering and tooling costs on the A350 program. Forward losses were also impacted by technical problems, realization targets, and existence and execution of factory recovery plans caused by the factors listed above and other factors. Additionally, the forward loss charges reflect anticipated production recovery costs related to the bankruptcy of a supplier and associated failure to deliver key parts on the A220 wing program, and, to a lesser extent, increased cost projections on the RB3070, B767, Bombardier Challenger 650, and a partial offset related to the release of a previously recorded forward loss provision that was impacted by the suspension of activities in Russia.Unfavorable cumulative catch-up adjustments of $27.7 were primarily recognized on the B737 MAX and A320 programs, reflective of increased costs experienced and estimated for supply chain, raw material, labor and other costs on the B737 MAX program, driven by production schedule changes, parts shortages, production recovery plan execution and increased supply chain and other costs. The A320 program unfavorable cumulative catch-up adjustment was driven by production cost overruns experienced due to operational and supply chain disruptions, and estimates of the impact of production schedule changes, increased material costs, increased freight costs, and increased labor and overhead costs.2021 Changes in EstimatesDuring the twelve months ended December 31, 2021, the Company recognized net forward loss charges of $241.5 primarily driven by production rate changes on B787 and A350 programs and the corresponding amount of fixed overhead absorption applied to lower deliveries, engineering analysis and estimated costs of rework on the B787 programs, estimated quality improvement costs on the A350 program, and cost performance on the B767 program. Unfavorable cumulative catch-up adjustments of $5.0 were primarily driven by the change on the estimate of production for the B737 program.
Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	$ 56.2	$ 27.7	$ 5.0
Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	264.7	250.3	241.5
Commercial [Member] \| Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	45.6	30.1	5.7
Commercial [Member] \| Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	234.0	243.9	227.3
Defense & Space [Member] \| Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	10.6	(2.4)	(0.7)
Defense & Space [Member] \| Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	30.7	6.4	14.2
Aftermarket [Member] \| Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	0.0	0.0	0.0
Aftermarket [Member] \| Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting	$ 0.0	$ 0.0	$ 0.0

Changes in Estimates (Details) - USD ($)
$ / shares in Units, $ in Millions

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Change In Estimate [Line Items]

Change In Accounting Estimate, aggregate, affecting earnings from continuing operations

$ (320.9)

$ (278.0)

$ (246.5)

Changes in Accounting Estimates - Contract Accounting, aggregate, Affecting earnings from Continuing Operations, per Share diluted

$ (3.12)

$ (2.68)

$ (2.29)

Change in Accounting Estimate, Description

Changes in Estimates The Company has a periodic forecasting process in which management assesses the progress and performance of the Company’s programs. This process requires management to review each program’s progress by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated revenues and costs for the accounting contracts (and options if applicable), and any outstanding contract matters. Risks and opportunities include but are not limited to management’s judgment about the cost associated with the Company’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product), and any other program requirements. Due to the span of years it may take to completely satisfy the performance obligations for the accounting contracts (and options, if any) and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs is subject to many variables and, accordingly, is subject to change based upon judgment. The Company’s estimate of costs depends on maintaining continuing, uninterrupted production at its manufacturing facilities and its suppliers’ facilities. Interruptions in deliveries of or increased prices for components or raw materials used in the Company's products could delay production and/or materially adversely affect the Company's business. When adjustments in estimated total consideration or estimated total cost are required, any changes from prior estimates for fully satisfied performance obligations are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. Cumulative catch-up adjustments are primarily related to changes in the estimated margin of contracts with performance obligations that are satisfied over time.Changes in estimates could materially affect the Company’s future financial performance. Other than certain increases in raw material costs that can generally be passed on to the Company’s customers, in most instances the Company must fully absorb cost overruns. Some of the factors that may cause the costs incurred in fulfilling contracts to vary substantially from current estimates are technical problems, production rate changes, materials shortages, supplier difficulties, realization targets, existence of and execution to recovery plans caused by these factors, and multiple other events, including those identified in Item 1A. "Risk Factors". The risk particularly applies to products such as the B787, A220, and A350, which are in forward loss positions.Changes in estimates are summarized below:Changes in EstimatesDecember 31, 2023December 31, 2022December 31, 2021(Unfavorable) Favorable Cumulative Catch-up Adjustments by SegmentCommercial$(45.6)$(30.1)$(5.7)Defense & Space(10.6)2.4 0.7 Aftermarket— — — Total (Unfavorable) Favorable Cumulative Catch-up Adjustment$(56.2)$(27.7)$(5.0)(Forward Loss) and Changes in Estimates on Loss Programs by SegmentCommercial$(234.0)$(243.9)$(227.3)Defense & Space(30.7)(6.4)(14.2)Aftermarket— — — Total (Forward Loss) and Change in Estimate on Loss Program$(264.7)$(250.3)$(241.5)Total Change in Estimate$(320.9)$(278.0)$(246.5)EPS Impact (diluted per share based on statutory tax rate)$(3.12)$(2.68)$(2.29)2023 Changes in EstimatesDuring the twelve months ended December 31, 2023, the Company recognized unfavorable change in estimates of $320.9, including forward loss charges of $470.3 and unfavorable cumulative catch-up adjustments of $56.2, partially offset by a reversal of forward loss charges of ($205.6) on the B787 resulting from the execution of the 2023 MOA, resulting in a net $264.7 of forward loss charges in 2023. The forward loss charges were primarily driven by labor and production cost growth, higher supply chain costs, and schedule revisions on the A350 program and additional labor, the impact of the IAM agreement and supply chain cost growth on the B787 program, increased factory performance and supply chain costs on the B767, higher production, labor and supply chain costs on the A220 program, and production costs incurred including the impact of the IAM agreement on the Sikorsky CH-53K program. The forward losses on the Airbus A220 program include net incremental losses for anticipated performance obligations beyond 2025 of $12.0 in total. Unfavorable cumulative catch-up adjustments of $56.2 were primarily recognized on the B737 MAX and A320 programs, reflective of increased supply chain, raw material, factory performance and other costs on the program including the impact of the IAM union negotiations on the B737 MAX program. The A320 program unfavorable cumulative catch-up adjustment was driven by production cost overruns experienced due to operational and supply chain disruptions, and foreign currency movements. 2022 Changes in EstimatesDuring the twelve months ended December 31, 2022, the Company recognized net forward loss charges of $250.3 primarily driven by increased cost estimates for production rate decreases and build schedule changes, supply chain costs, costs of rework, and other costs on the B787 program, and additional labor, freight, and other cost requirements driven by parts shortages and production and quality issues, production schedule changes received from Airbus, increased freight and utility costs, and increased non-recurring engineering and tooling costs on the A350 program. Forward losses were also impacted by technical problems, realization targets, and existence and execution of factory recovery plans caused by the factors listed above and other factors. Additionally, the forward loss charges reflect anticipated production recovery costs related to the bankruptcy of a supplier and associated failure to deliver key parts on the A220 wing program, and, to a lesser extent, increased cost projections on the RB3070, B767, Bombardier Challenger 650, and a partial offset related to the release of a previously recorded forward loss provision that was impacted by the suspension of activities in Russia.Unfavorable cumulative catch-up adjustments of $27.7 were primarily recognized on the B737 MAX and A320 programs, reflective of increased costs experienced and estimated for supply chain, raw material, labor and other costs on the B737 MAX program, driven by production schedule changes, parts shortages, production recovery plan execution and increased supply chain and other costs. The A320 program unfavorable cumulative catch-up adjustment was driven by production cost overruns experienced due to operational and supply chain disruptions, and estimates of the impact of production schedule changes, increased material costs, increased freight costs, and increased labor and overhead costs.2021 Changes in EstimatesDuring the twelve months ended December 31, 2021, the Company recognized net forward loss charges of $241.5 primarily driven by production rate changes on B787 and A350 programs and the corresponding amount of fixed overhead absorption applied to lower deliveries, engineering analysis and estimated costs of rework on the B787 programs, estimated quality improvement costs on the A350 program, and cost performance on the B767 program. Unfavorable cumulative catch-up adjustments of $5.0 were primarily driven by the change on the estimate of production for the B737 program.

Cumulative catch-up adjustment [Member]

Change In Estimate [Line Items]

Change in Accounting Estimate - Contract Accounting

$ 56.2

$ 27.7

$ 5.0

Forward Loss [Member]

Change In Estimate [Line Items]

Change in Accounting Estimate - Contract Accounting

264.7

250.3

241.5