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Investments - Equity Method Investments Narratives (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 EUR (€)
Debt and Equity Securities, FV-NI
New investments	$ 3.4
Equity method investments	100.9	$ 99.6
Equity in (loss) earnings of unconsolidated affiliates, net	(0.3)		$ 0.1
(Decrease) increase in fair value of investments in equity securities	(2.6)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
New investments	0.5
Equity method investments	100.9	99.6
Equity in (loss) earnings of unconsolidated affiliates, net	(0.4)
Cryomotive GmbH | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	6.5	7.1
Equity in (loss) earnings of unconsolidated affiliates, net	(0.5)
HTEC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity method investments	87.4	86.4
Equity in (loss) earnings of unconsolidated affiliates, net	$ (0.3)
Hudson Products de Mexico S.A. de CV | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity investments, ownership interest (percent)	50.00%			50.00%
Equity method investments	$ 3.6	3.3
Equity in (loss) earnings of unconsolidated affiliates, net	$ 0.3		$ 0.1
Liberty LNG | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
Equity investments, ownership interest (percent)	25.00%			25.00%
Equity method investments	$ 2.5	2.4
Equity in (loss) earnings of unconsolidated affiliates, net	0.1
Earthly Labs Inc. | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Debt and Equity Securities, FV-NI
New investments		$ 0.5
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
Clean H2 Infra Fund
Debt and Equity Securities, FV-NI
Unfunded commitment | €				€ 47.8

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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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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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