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First Right Of Refusal Compensation Rate Relative To Third Party

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Invested Capital Multiple

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Percentage Shares Callable

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Potential Extension Term

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Shareholder Distribution Threshold

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The carrying amount of assets an investment adviser manages on behalf of investors.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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Amount of funds committed to investment company from investors.

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Percentage of capital contributed to capital committed by investment company's investors.

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Rate of interest on investment.

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments - Co-Investment Agreement (Details) € in Millions		3 Months Ended
	Dec. 15, 2021 EUR (€)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 07, 2021 USD ($)	Apr. 05, 2021 EUR (€)
Debt and Equity Securities, FV-NI
Investments in equity securities \| $		$ 94,600,000	$ 96,500,000
Hydrogen Fund
Debt and Equity Securities, FV-NI
Investment term (in years)	12 years
Hydrogen Fund \| Maximum
Debt and Equity Securities, FV-NI
Aggregate capital commitments \| €	€ 1,800.0
Hy24
Debt and Equity Securities, FV-NI
Management assets \| €					€ 150,000.0
Capital Commitment Condition One \| Hydrogen Fund
Debt and Equity Securities, FV-NI
Aggregate capital commitments (in percent)	15.00%
Capital Commitment Condition Two \| Hydrogen Fund
Debt and Equity Securities, FV-NI
Aggregate capital commitments (in percent)	20.00%
Class A1 \| Capital Commitment Condition One \| Hydrogen Fund
Debt and Equity Securities, FV-NI
Investment interest (as a percent)	7.00%
Class A1 \| Capital Commitment Condition Two \| Hydrogen Fund
Debt and Equity Securities, FV-NI
Investment interest (as a percent)	6.50%
Class A1 \| Capital Commitment Condition Three \| Hydrogen Fund
Debt and Equity Securities, FV-NI
Investment interest (as a percent)	0.50%
Hy24
Debt and Equity Securities, FV-NI
Investments in equity securities		800,000	$ 900,000		0.7
Unfunded commitment \| €					€ 49.3
Return of capital \| $		$ 200,000
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%