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Investments - Co-Investment Agreement (Details) € in Millions	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 07, 2021 USD ($)	Apr. 05, 2021 USD ($)	Apr. 05, 2021 EUR (€)
Debt and Equity Securities, FV-NI
Equity method investments	$ 104,600,000	$ 109,900,000
Investments in equity securities	102,000,000.0	91,200,000
Capital Commitment Condition One
Debt and Equity Securities, FV-NI
Investment, Type [Extensible Enumeration]				Common Stock	Common Stock
HTEC
Debt and Equity Securities, FV-NI
Equity method investments	$ 77,600,000	$ 82,300,000
Hy24
Debt and Equity Securities, FV-NI
Investments in equity securities				$ 15,200,000	€ 14.2
Unfunded commitment				$ 38,400,000	€ 35.8
Corporate Joint Venture | HTEC | Common Stock
Debt and Equity Securities, FV-NI
Right of refusal compensation percentage (percent)			102.00%
Closing through third anniversary | Corporate Joint Venture | HTEC
Debt and Equity Securities, FV-NI
Put option internal rate of return (percent)			10.00%
Closing through third anniversary | Corporate Joint Venture | HTEC | Common Stock
Debt and Equity Securities, FV-NI
Invested capital multiple rate			1.65
Closing through third anniversary | ISQ | Corporate Joint Venture
Debt and Equity Securities, FV-NI
Shareholder distribution threshold			$ 900,000,000.0
After third anniversary | Corporate Joint Venture | HTEC
Debt and Equity Securities, FV-NI
Put option internal rate of return (percent)			12.50%
After third anniversary | Corporate Joint Venture | HTEC | Common Stock
Debt and Equity Securities, FV-NI
Percentage of shares callable upon exercise of call option (percent)			20.00%

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