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Investments - Narratives (Details) € in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) installments	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 07, 2021 USD ($)	Apr. 05, 2021 USD ($)	Apr. 05, 2021 EUR (€)
Debt and Equity Securities, FV-NI
Investments in equity securities	$ 114,600,000	$ 91,200,000	$ 96,500,000
Hy24
Debt and Equity Securities, FV-NI
Investments in equity securities					$ 14,700,000	€ 14.2
Unfunded commitments					$ 37,200,000	€ 35.8
Corporate Joint Venture | HTEC | Common Stock
Debt and Equity Securities, FV-NI
Right of refusal compensation percentage (percent)				102.00%
Squared Capital
Debt and Equity Securities, FV-NI
Warrant settlement in all cash	225,000,000.0
Warrant settlement partial payment	$ 250,000,000.0
Number of installments | installments	3
Warrant settlement, installment payment	$ 75,000,000.0
Squared Capital | Installment One
Debt and Equity Securities, FV-NI
Warrant settlement clause	$ 83,300,000
Anniversary Period One | Corporate Joint Venture | HTEC | Common Stock
Debt and Equity Securities, FV-NI
Invested capital multiple rate				1.65
Anniversary Period One | Squared Capital | Corporate Joint Venture
Debt and Equity Securities, FV-NI
Shareholder distribution threshold				$ 900,000,000.0
Anniversary Period Two | Corporate Joint Venture | HTEC
Debt and Equity Securities, FV-NI
Put option internal rate of return (percent)				12.50%
Anniversary Period Two | 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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