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Investments - Equity Method Investments Narratives (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	May 04, 2022	Dec. 31, 2021	Aug. 27, 2021
Debt and Equity Securities, FV-NI
Equity method investments	$ 97.0			$ 97.0			$ 99.6
Equity in (loss) earnings of unconsolidated affiliates, net				(0.6)	$ 0.2
Realized gain on equity method investment	0.3		$ 0.0	0.3	0.0
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	97.0			97.0			99.6
Equity in (loss) earnings of unconsolidated affiliates, net				(0.6)
Realized gain on equity method investment		$ 0.3
Cryomotive GmbH | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	5.7			5.7			7.1
Equity in (loss) earnings of unconsolidated affiliates, net	(0.4)			(0.9)
HTEC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	84.4			84.4			86.4
Equity in (loss) earnings of unconsolidated affiliates, net	(0.3)			(0.5)
Hudson Products de Mexico S.A. de CV | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	3.8			3.8			3.3
Equity in (loss) earnings of unconsolidated affiliates, net	$ 0.3		0.1	$ 0.6	0.1
Equity investments, ownership interest (percent)	50.00%			50.00%
Liberty LNG | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	$ 2.7			$ 2.7			$ 2.4
Equity in (loss) earnings of unconsolidated affiliates, net	$ 0.1		$ 0.1	$ 0.2	$ 0.1
Equity investments, ownership interest (percent)	25.00%			25.00%
Other Investments | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity in (loss) earnings of unconsolidated affiliates, net				$ 0.4
AdEdge India | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments								$ 0.5
Equity investments, ownership interest (percent)		50.00%				50.00%		50.00%
Realized gain on equity method investment		$ 0.3

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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