Discontinued Operations - Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock-based compensation expense	$ 51.9	$ 78.9	$ 98.1
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (gain) on sale		(2.8)	(90.6)
Depreciation and amortization		0.0	18.8
Stock-based compensation expense		0.0	10.9
Capital expenditures		0.0	1.9
Discontinued Operations, Disposed of by Sale | Specialty Vehicle Technologies
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (gain) on sale		(2.8)	(298.3)
Depreciation and amortization		0.0	14.8
Stock-based compensation expense		0.0	8.2
Capital expenditures		0.0	1.6
Discontinued Operations, Disposed of by Sale | High Pressure Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (gain) on sale		0.0	207.7
Depreciation and amortization		0.0	4.0
Stock-based compensation expense		0.0	2.7
Capital expenditures		$ 0.0	$ 0.3