Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	$ 631.2	$ 630.5
Revenues	6,047.9	5,029.6	$ 3,953.0
Net income	$ (616.2)	$ (545.7)	$ (540.8)
Earnings Per Share, Diluted	$ (5.78)	$ (5.21)	$ (5.19)
Provision for Loss on Contracts	$ 256.6	$ 305.9
Goodwill, Other Increase (Decrease)	0.6
Payments to Acquire Businesses, Net of Cash Acquired	0.0	31.3	$ 21.1
Goodwill, Acquired During Period	0.0
Payments to Acquire Businesses, Net of Cash Acquired	0.0	31.3	21.1
Commercial [Member]
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	296.6	296.5
Revenues	4,885.0	4,068.4	3,128.1
Goodwill, Other Increase (Decrease)	0.0
Goodwill, Acquired During Period	0.0
Defense & Space [Member]
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	13.2	12.6
Revenues	789.0	649.8	585.0
Goodwill, Other Increase (Decrease)	0.6
Aftermarket [Member]
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	321.4	321.4
Revenues	373.9	311.4	$ 239.9
Goodwill, Other Increase (Decrease)	0.0
Goodwill, Acquired During Period	$ 0.0
T.E.A.M., Inc. Acquisition
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Transaction Costs		1.2
Business Acquisition, Effective Date of Acquisition	Nov. 23, 2022
Business Acquisition, Description of Acquired Entity	a Rhode Island corporation, which is engaged in the business of manufacturing and engineering textiles, composites, and textile and composite products
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		8.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		13.5
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets	$ (0.6)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		1.7
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$ 7.7
T.E.A.M., Inc. Acquisition | Defense & Space [Member]
Business Acquisition, Contingent Consideration [Line Items]
Goodwill, Acquired During Period	$ 0.0