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Investments - Investments in Equity Securities Narrative (Details) € in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 05, 2021 USD ($)	Apr. 05, 2021 EUR (€)
Debt and Equity Securities, FV-NI
Investments in equity securities		$ 96.5	$ 91.2	$ 96.5	$ 77.8
Decrease in fair value of investments in equity securities			(14.4)	13.1
Payments to acquire equity securities			8.7	9.4
McPhy
Debt and Equity Securities, FV-NI
Investments in equity securities		17.2	4.8	17.2
Decrease in fair value of investments in equity securities			(12.7)	(11.8)	(19.7)
Stabilis Energy, Inc.
Debt and Equity Securities, FV-NI
Investments in equity securities		7.8	6.1	7.8
Decrease in fair value of investments in equity securities			(1.7)	1.6	$ 2.2
Transform Materials
Debt and Equity Securities, FV-NI
Investments in equity securities		25.1	25.1	25.1
Svante Inc.
Debt and Equity Securities, FV-NI
Investments in equity securities			38.5
Hy24
Debt and Equity Securities, FV-NI
Investments in equity securities		0.9	4.1	0.9		$ 3.4	€ 3.2
Cemvita Factory Inc., Gold Hydrogen LLC
Debt and Equity Securities, FV-NI
Investments in equity securities		2.0	2.0	2.0
Avina Clean Hydrogen Inc.
Debt and Equity Securities, FV-NI
Investments in equity securities		10.0	$ 10.0	$ 10.0
Payments to acquire equity securities	$ 5.0	$ 5.0