Investments - Investment in NGP (Additional Information) (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	May 31, 2023	May 31, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Performance allocations, percentage (percent)					47.50%
NGP Management
Schedule of Equity Method Investments [Line Items]
Net investment earnings related to performance allocations			$ 3.0	$ 34.8	$ 18.3	$ 36.5
Net investment (losses) earnings related to principal investment income			$ 0.7	4.0	2.7	3.9
Carlyle FRL
Schedule of Equity Method Investments [Line Items]
Investment loss		$ 176.9			$ 104.0
Carlyle FRL | Fortitude Group Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	10.50%	13.50%
Carlyle FRL | Global Credit
Schedule of Equity Method Investments [Line Items]
Investment loss				$ 104.0		$ 104.0
Carlyle FRL | Global Credit | Fortitude Group Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Prior ownership percentage						13.50%
Ownership percentage						10.50%
Minimum
Schedule of Equity Method Investments [Line Items]
Performance allocations, carry funds, percentage (percent)					40.00%
Minimum | NGP Management
Schedule of Equity Method Investments [Line Items]
Management fee, percentage of commitments (percent)					1.00%
Management fee, percentage of invested capital (percent)					0.50%
Minimum | Carlyle FRL | Fortitude Group Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage		13.50%
Maximum
Schedule of Equity Method Investments [Line Items]
Performance allocations, carry funds, percentage (percent)					42.75%
Maximum | NGP Management
Schedule of Equity Method Investments [Line Items]
Management fee, percentage of commitments (percent)					2.00%
Management fee, percentage of invested capital (percent)					2.00%
Maximum | Carlyle FRL | Fortitude Group Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage		19.90%
Management Fee Related Revenues | Investment in NGP Management
Schedule of Equity Method Investments [Line Items]
Management fee-related revenues, allocation percentage (percent)					55.00%