Consolidated Schedule of Investments (Parenthetical) € in Millions, £ in Millions, kr in Millions, kr in Millions, $ in Millions, $ in Millions, $ in Millions		3 Months Ended			9 Months Ended			12 Months Ended
		Sep. 30, 2022 USD ($)		Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)		Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)		Sep. 30, 2022 AUD ($)	Sep. 30, 2022 CAD ($)	Sep. 30, 2022 EUR (€)	Sep. 30, 2022 GBP (£)	Sep. 30, 2022 NOK (kr)	Sep. 30, 2022 SEK (kr)	Dec. 31, 2021 AUD ($)	Dec. 31, 2021 CAD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 GBP (£)	Dec. 31, 2021 NOK (kr)	Dec. 31, 2021 SEK (kr)
Derivative [Line Items]
Value at Settlement		$ 231.3			$ 231.3			$ 269.6
Current Value		192.8			192.8			261.2
Derivative Assets Subject to Master Netting Agreement		39.0			39.0			9.0
Derivatives Available for Offset		0.0			0.0			(1.0)
Derivative asset		$ 38.5			$ 38.5			$ 8.4
Qualifying assets, percent of total assets		76.50%			76.50%			75.10%		76.50%	76.50%	76.50%	76.50%	76.50%	76.50%	75.10%	75.10%	75.10%	75.10%	75.10%	75.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					$ 16,101.0
Net realized gain (loss) on investments:					214.0		$ 123.0
Net change in unrealized appreciation (depreciation) on investments:	[1]				(930.0)		773.0
Fair Value, ending balance		$ 15,791.8	[2]		15,791.8	[2]		$ 16,101.0
PIK Income					$ 89.0		67.0
LIBOR
Derivative [Line Items]
Variable rate		3.75%			3.75%			0.21%		3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	0.21%	0.21%	0.21%	0.21%	0.21%	0.21%
EURIBOR
Derivative [Line Items]
Variable rate		1.17%			1.17%			(0.57%)		1.17%	1.17%	1.17%	1.17%	1.17%	1.17%	(0.57%)	(0.57%)	(0.57%)	(0.57%)	(0.57%)	(0.57%)
CDOR
Derivative [Line Items]
Variable rate		4.20%			4.20%			0.52%		4.20%	4.20%	4.20%	4.20%	4.20%	4.20%	0.52%	0.52%	0.52%	0.52%	0.52%	0.52%
BBSY
Derivative [Line Items]
Variable rate		3.11%			3.11%			0.12%		3.11%	3.11%	3.11%	3.11%	3.11%	3.11%	0.12%	0.12%	0.12%	0.12%	0.12%	0.12%
REIBOR
Derivative [Line Items]
Variable rate		6.30%			6.30%			2.65%		6.30%	6.30%	6.30%	6.30%	6.30%	6.30%	2.65%	2.65%	2.65%	2.65%	2.65%	2.65%
STIBOR
Derivative [Line Items]
Variable rate		1.73%			1.73%			(0.05%)		1.73%	1.73%	1.73%	1.73%	1.73%	1.73%	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)
Sterling Interbank Offered Rate, SONIA
Derivative [Line Items]
Variable rate		2.19%			2.19%			0.19%		2.19%	2.19%	2.19%	2.19%	2.19%	2.19%	0.19%	0.19%	0.19%	0.19%	0.19%	0.19%
Secured Overnight Financing Rate (SOFR)
Derivative [Line Items]
Variable rate		3.59%			3.59%			0.05%		3.59%	3.59%	3.59%	3.59%	3.59%	3.59%	0.05%	0.05%	0.05%	0.05%	0.05%	0.05%
Pime
Derivative [Line Items]
Variable rate		6.25%			6.25%			3.25%		6.25%	6.25%	6.25%	6.25%	6.25%	6.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					$ 859.0		533.8	$ 533.8
Gross Additions					366.6	[3]		706.2	[4]
Gross Reductions					(736.6)	[5]		(667.2)	[6]
Net realized gain (loss) on investments:		$ 51.0		$ 139.0	89.8		203.0	191.9
Net change in unrealized appreciation (depreciation) on investments:		(99.0)		(104.0)	(139.6)		65.0	94.3
Fair Value, ending balance		439.2			439.2			859.0
Investment Income					24.7	[7]		20.8	[8]
PIK Income		12.0		4.0	37.2	[7]	12.0	18.5	[8]
Fee income		3.0		2.0	4.9	[7]	2.0	1.9	[8]
Dividend and other income		0.0		0.0	6.5	[7]	0.0	0.4	[8]
Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					2,684.1		1,259.7	1,259.7
Gross Additions					579.2	[3]		1,568.4	[4]
Gross Reductions					(203.8)	[5]		(252.0)	[6]
Net realized gain (loss) on investments:		(4.0)		(2.0)	(42.5)		(58.0)	(48.5)
Net change in unrealized appreciation (depreciation) on investments:		(69.0)		11.0	(215.7)		193.0	156.5
Fair Value, ending balance		2,801.3			2,801.3			2,684.1
Investment Income					37.0	[7]		25.0	[8]
PIK Income		9.0		15.0	34.0	[7]	23.0	35.9	[8]
Fee income		0.0		0.0	0.0	[7]	1.0	0.6	[8]
Dividend and other income		58.0		$ 47.0	168.2	[7]	120.0	165.7	[8]
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,AUD October 17, 2022
Derivative [Line Items]
Value at Settlement		2.1			2.1					$ 3.0
Current Value		1.9			1.9
Derivative Assets Subject to Master Netting Agreement		0.2			0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,AUD October 2022
Derivative [Line Items]
Value at Settlement								2.1								$ 3.0
Current Value								2.2
Derivatives Available for Offset								(0.1)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,AUD, February 2023
Derivative [Line Items]
Value at Settlement								1.6								$ 2.2
Current Value								1.6
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,AUD, February 14, 2023
Derivative [Line Items]
Value at Settlement		1.6			1.6					$ 2.2
Current Value		1.4			1.4
Derivative Assets Subject to Master Netting Agreement		0.2			0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, January 11, 2023
Derivative [Line Items]
Value at Settlement		1.2			1.2						$ 1.5
Current Value		1.1			1.1
Derivative Assets Subject to Master Netting Agreement		0.1			0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, July 5, 2023, 1
Derivative [Line Items]
Value at Settlement		1.5			1.5						1.9
Current Value		1.4			1.4
Derivative Assets Subject to Master Netting Agreement		0.1			0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, July 5, 2023, 2
Derivative [Line Items]
Value at Settlement		1.1			1.1						1.4
Current Value		1.0			1.0
Derivative Assets Subject to Master Netting Agreement		0.1			0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, June 2022 ,1
Derivative [Line Items]
Value at Settlement								1.1									$ 1.4
Current Value								1.1
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, June 2022 ,2
Derivative [Line Items]
Value at Settlement								1.5									1.9
Current Value								1.5
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, November 10, 2022
Derivative [Line Items]
Value at Settlement		1.2			1.2						1.5
Current Value		1.1			1.1
Derivative Assets Subject to Master Netting Agreement		0.1			0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, November 15, 2024
Derivative [Line Items]
Value at Settlement		3.2			3.2						$ 4.0
Current Value		2.9			2.9
Derivative Assets Subject to Master Netting Agreement		0.3			0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, November 2022
Derivative [Line Items]
Value at Settlement								1.2									1.5
Current Value								1.1
Derivative Assets Subject to Master Netting Agreement								0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,CAD, November 2022 ,1
Derivative [Line Items]
Value at Settlement								3.2									$ 4.0
Current Value								3.1
Derivative Assets Subject to Master Netting Agreement								0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, August 2025,1
Derivative [Line Items]
Value at Settlement								5.7										€ 4.8
Current Value								5.7
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, August 2025,2
Derivative [Line Items]
Value at Settlement								2.3										1.9
Current Value								2.3
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, August 8, 2025 , 1
Derivative [Line Items]
Value at Settlement		5.7			5.7							€ 4.8
Current Value		4.9			4.9
Derivative Assets Subject to Master Netting Agreement		0.8			0.8
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, August 8, 2025, 2
Derivative [Line Items]
Value at Settlement		2.3			2.3							1.9
Current Value		2.0			2.0
Derivative Assets Subject to Master Netting Agreement		0.3			0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, December 15, 2023
Derivative [Line Items]
Value at Settlement		13.4			13.4							13.0
Current Value		13.1			13.1
Derivative Assets Subject to Master Netting Agreement		0.3			0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, February 2021
Derivative [Line Items]
Value at Settlement								49.1										42.3
Current Value								49.4
Derivatives Available for Offset								(0.3)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, February 23, 2024
Derivative [Line Items]
Value at Settlement		49.1			49.1							42.3
Current Value		42.7			42.7
Derivative Assets Subject to Master Netting Agreement		6.4			6.4
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, July 17, 2023
Derivative [Line Items]
Value at Settlement		1.7			1.7							€ 1.3
Current Value		1.3			1.3
Derivative Assets Subject to Master Netting Agreement		0.4			0.4
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, July 2023
Derivative [Line Items]
Value at Settlement								1.7										1.3
Current Value								1.5
Derivative Assets Subject to Master Netting Agreement								0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, June 2022 ,1
Derivative [Line Items]
Value at Settlement								7.5										6.1
Current Value								7.0
Derivative Assets Subject to Master Netting Agreement								0.5
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, June 2022 ,2
Derivative [Line Items]
Value at Settlement								2.0										1.6
Current Value								1.8
Derivative Assets Subject to Master Netting Agreement								0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, June 2022 ,3
Derivative [Line Items]
Value at Settlement								0.9										0.7
Current Value								0.8
Derivative Assets Subject to Master Netting Agreement								0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, June 2022 ,4
Derivative [Line Items]
Value at Settlement								2.7										2.2
Current Value								2.5
Derivative Assets Subject to Master Netting Agreement								0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, June 2022 ,5
Derivative [Line Items]
Value at Settlement								1.2										0.9
Current Value								1.1
Derivative Assets Subject to Master Netting Agreement								0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,EUR, September, 2022
Derivative [Line Items]
Value at Settlement								11.7										€ 10.0
Current Value								11.5
Derivative Assets Subject to Master Netting Agreement								0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January 11, 2023, 4
Derivative [Line Items]
Value at Settlement		6.6			6.6								£ 5.0
Current Value		5.5			5.5
Derivative Assets Subject to Master Netting Agreement		1.1			1.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January 11, 2023, 5
Derivative [Line Items]
Value at Settlement		1.9			1.9								1.4
Current Value		1.6			1.6
Derivative Assets Subject to Master Netting Agreement		0.3			0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January 11, 2023,1
Derivative [Line Items]
Value at Settlement		2.9			2.9								1.9
Current Value		2.2			2.2
Derivative Assets Subject to Master Netting Agreement		0.7			0.7
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January 11, 2023,2
Derivative [Line Items]
Value at Settlement		2.6			2.6								1.7
Current Value		1.9			1.9
Derivative Assets Subject to Master Netting Agreement		0.7			0.7
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January 11, 2023,3
Derivative [Line Items]
Value at Settlement		4.8			4.8								3.4
Current Value		3.8			3.8
Derivative Assets Subject to Master Netting Agreement		1.0			1.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January, 2023,1
Derivative [Line Items]
Value at Settlement								2.9											£ 1.9
Current Value								2.6
Derivative Assets Subject to Master Netting Agreement								0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January, 2023,2
Derivative [Line Items]
Value at Settlement								2.6											1.7
Current Value								2.3
Derivative Assets Subject to Master Netting Agreement								0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January, 2023,3
Derivative [Line Items]
Value at Settlement								4.8											3.4
Current Value								4.6
Derivative Assets Subject to Master Netting Agreement								0.2
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January, 2023,4
Derivative [Line Items]
Value at Settlement								6.5											5.0
Current Value								6.6
Derivatives Available for Offset								(0.1)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, January, 2023,5
Derivative [Line Items]
Value at Settlement								1.9											1.4
Current Value								1.9
Derivative Assets Subject to Master Netting Agreement								0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, October 13, 2023
Derivative [Line Items]
Value at Settlement		8.5			8.5								£ 6.2
Current Value		6.9			6.9
Derivative Assets Subject to Master Netting Agreement		1.6			1.6
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,GPB, October, 2023
Derivative [Line Items]
Value at Settlement								8.5											£ 6.2
Current Value								8.4
Derivative Assets Subject to Master Netting Agreement								0.1
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,NOK, August 8, 2025
Derivative [Line Items]
Value at Settlement		4.8			4.8									kr 45.0
Current Value		4.2			4.2
Derivative Assets Subject to Master Netting Agreement		0.6			0.6
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,NOK, August, 2025,1
Derivative [Line Items]
Value at Settlement								5.2												kr 49.1
Current Value								5.5
Derivatives Available for Offset								(0.3)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,NOK, August, 2025,2
Derivative [Line Items]
Value at Settlement								1.2												kr 11.4
Current Value								1.3
Derivatives Available for Offset								(0.1)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, Auguest,2025,1
Derivative [Line Items]
Value at Settlement								13.3													kr 119.3
Current Value								13.5
Derivatives Available for Offset								(0.2)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, Auguest,2025,2
Derivative [Line Items]
Value at Settlement								3.1													27.8
Current Value								3.2
Derivatives Available for Offset								(0.1)
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, August 8, 2025,1
Derivative [Line Items]
Value at Settlement		13.3			13.3										kr 119.3
Current Value		11.0			11.0
Derivative Assets Subject to Master Netting Agreement		2.3			2.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, August 8, 2025,2
Derivative [Line Items]
Value at Settlement		3.1			3.1										27.8
Current Value		2.6			2.6
Derivative Assets Subject to Master Netting Agreement		0.5			0.5
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, March,2024
Derivative [Line Items]
Value at Settlement								8.5													72.8
Current Value								8.2
Derivative Assets Subject to Master Netting Agreement								0.3
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May 10, 2024,1
Derivative [Line Items]
Value at Settlement		60.1			60.1										503.0
Current Value		46.1			46.1
Derivative Assets Subject to Master Netting Agreement		14.0			14.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May 10, 2024,2
Derivative [Line Items]
Value at Settlement		4.1			4.1										34.5
Current Value		3.1			3.1
Derivative Assets Subject to Master Netting Agreement		1.0			1.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May 10, 2024,3
Derivative [Line Items]
Value at Settlement		8.1			8.1										68.0
Current Value		6.2			6.2
Derivative Assets Subject to Master Netting Agreement		1.9			1.9
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May 10, 2024,4
Derivative [Line Items]
Value at Settlement		26.4			26.4										kr 250.0
Current Value		22.9			22.9
Derivative Assets Subject to Master Netting Agreement		3.5			3.5
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May,2024,1
Derivative [Line Items]
Value at Settlement								51.4													430.3
Current Value								48.4
Derivative Assets Subject to Master Netting Agreement								3.0
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May,2024,2
Derivative [Line Items]
Value at Settlement								60.1													503.0
Current Value								56.6
Derivative Assets Subject to Master Netting Agreement								3.5
Open Forward Foreign Currency Contract, Identifier [Axis]: JP Morgan Chase Bank ,SEK, May,2024,3
Derivative [Line Items]
Value at Settlement								4.1													kr 34.5
Current Value								3.9
Derivative Assets Subject to Master Netting Agreement								0.2
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					122.6
Gross Additions	[3]				17.7
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(34.9)
Fair Value, ending balance		105.4			105.4			122.6
Investment Income	[7]				0.6
PIK Income	[7]				15.2
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.4
Gross Additions	[3]				1.6
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		3.0			3.0			1.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.8
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					2.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.3)
Fair Value, ending balance		2.1			2.1			2.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Other Senior Secured Debt | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					23.5
Gross Additions	[3]				1.2
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(3.5)
Fair Value, ending balance		21.2			21.2			23.5
Investment Income	[7]				0.2
PIK Income	[7]				1.5
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien -3 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					64.4
Gross Additions	[3]				2.8
Gross Reductions	[5]				(0.4)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.9
Fair Value, ending balance		67.7			67.7			64.4
Investment Income	[7]				4.7
PIK Income	[7]				1.5
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock , Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					20.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					4.4
Fair Value, ending balance		24.8			24.8			20.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					23.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(8.8)
Fair Value, ending balance		14.3			14.3			23.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					57.2
Gross Additions	[3]				0.2
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.2)
Fair Value, ending balance		57.2			57.2			57.2
Investment Income	[7]				3.5
PIK Income	[7]				1.3
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Senior Secured Loans—Second Lien | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					(39.1)
Net change in unrealized appreciation (depreciation) on investments:					39.1
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					3.8
Fair Value, ending balance		10.9			10.9			7.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt -2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: JW Aluminum Co, Other Senior Secured Debt | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					81.0
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(2.6)
Fair Value, ending balance		78.5			78.5			81.0
Investment Income	[7]				6.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					11.9
Gross Additions	[3]				0.0
Gross Reductions	[5]				(11.9)
Net realized gain (loss) on investments:					11.9
Net change in unrealized appreciation (depreciation) on investments:					(11.9)
Fair Value, ending balance		0.0			0.0			11.9
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				(0.4)
Net realized gain (loss) on investments:					0.2
Net change in unrealized appreciation (depreciation) on investments:					(0.2)
Fair Value, ending balance		0.0			0.0			0.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK , Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					6.2
Gross Additions	[3]				0.0
Gross Reductions	[5]				(6.2)
Net realized gain (loss) on investments:					6.2
Net change in unrealized appreciation (depreciation) on investments:					(6.2)
Fair Value, ending balance		0.0			0.0			6.2
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					26.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(3.6)
Fair Value, ending balance		22.5			22.5			26.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units , Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.3
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.3)
Fair Value, ending balance		9.0			9.0			9.3
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[9]				67.5
Gross Additions	[9]				0.0
Gross Reductions	[9]				(65.4)
Net realized gain (loss) on investments:	[9]				22.9
Net change in unrealized appreciation (depreciation) on investments:	[9]				(25.0)
Fair Value, ending balance	[9]	0.0			0.0			67.5
Investment Income	[9]				0.0
PIK Income	[9]				0.0
Fee income	[9]				0.0
Dividend and other income	[9]				0.0
Investment, Identifier [Axis]: Sound United LLC, Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[9]				77.5
Gross Additions	[9]				0.0
Gross Reductions	[9]				(17.3)
Net realized gain (loss) on investments:	[9]				0.0
Net change in unrealized appreciation (depreciation) on investments:	[9]				(60.2)
Fair Value, ending balance	[9]	0.0			0.0			77.5
Investment Income	[9]				0.0
PIK Income	[9]				0.0
Fee income	[9]				0.0
Dividend and other income	[9]				0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock , Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					23.1		10.3	10.3
Gross Additions	[4]							9.6
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								3.2
Fair Value, ending balance								23.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					57.2		29.4	29.4
Gross Additions	[4]							25.7
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								2.1
Fair Value, ending balance								57.2
Investment Income	[8]							3.6
PIK Income	[8]							1.3
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ASG Technologies, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		42.7	42.7
Gross Additions	[4]							0.0
Gross Reductions	[6]							(79.4)
Net realized gain (loss) on investments:								56.0
Net change in unrealized appreciation (depreciation) on investments:								(19.3)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ASG Technologies, Warrants, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		3.5	3.5
Gross Additions	[4]							0.0
Gross Reductions	[6]							(10.2)
Net realized gain (loss) on investments:								3.7
Net change in unrealized appreciation (depreciation) on investments:								3.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ATX Networks Corp | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					46.8		0.0	0.0
Gross Additions	[4]							46.8
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								46.8
Investment Income	[8]							1.3
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		12.0	12.0
Gross Additions	[4]							4.1
Gross Reductions	[6]							(15.9)
Net realized gain (loss) on investments:								(4.6)
Net change in unrealized appreciation (depreciation) on investments:								4.4
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(16.5)
Net change in unrealized appreciation (depreciation) on investments:								16.5
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Warrant | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(0.1)
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Affordable Care Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.1		0.0	0.0
Gross Additions	[4]							48.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.0
Fair Value, ending balance								52.1
Investment Income	[8]							0.0
PIK Income	[8]							2.3
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					34.8		59.7	59.7
Gross Additions	[4]							2.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(27.3)
Fair Value, ending balance								34.8
Investment Income	[8]							1.1
PIK Income	[8]							1.4
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Trade Claim | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							(1.4)
Net realized gain (loss) on investments:								0.4
Net change in unrealized appreciation (depreciation) on investments:								1.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Avenue One PropCo, Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				41.3
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		41.3			41.3			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Avida Holding AB, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.3		38.3	38.3
Gross Additions	[4]							9.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.9
Fair Value, ending balance								52.3
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Avida Holding AB, Common Stock, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.3
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(14.6)
Fair Value, ending balance		37.7			37.7			52.3
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Belk Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					6.7		0.0	0.0
Gross Additions	[4]							4.2
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								2.5
Fair Value, ending balance								6.7
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.7		3.2	3.2
Gross Additions	[4]							5.2
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.7)
Fair Value, ending balance								7.7
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Charlotte Russe Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(12.5)
Net change in unrealized appreciation (depreciation) on investments:								12.5
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.2		0.0	0.0
Gross Additions	[4]							10.3
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(10.1)
Fair Value, ending balance								0.2
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp , Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Fronton BV, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.4		1.2	1.2
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.2
Fair Value, ending balance								1.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.1		0.0	0.0
Gross Additions	[4]							7.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								7.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc-1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					33.6		0.0	0.0
Gross Additions	[4]							49.2
Gross Reductions	[6]							(7.1)
Net realized gain (loss) on investments:								(8.5)
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								33.6
Investment Income	[8]							0.5
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc-2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					2.0		0.0	0.0
Gross Additions	[4]							14.0
Gross Reductions	[6]							(19.0)
Net realized gain (loss) on investments:								7.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								2.0
Investment Income	[8]							0.4
PIK Income	[8]							0.8
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders, Equity Options | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders, Equity Options, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1		0.0	0.0
Gross Additions	[4]							0.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.6		0.0	0.0
Gross Additions	[4]							1.5
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								1.6
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV, Private Equity, Asset Based Finance -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.4		0.0	0.0
Gross Additions	[4]							5.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.0
Fair Value, ending balance								9.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					90.4		38.5	38.5
Gross Additions	[4]							83.4
Gross Reductions	[6]							(36.3)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.8
Fair Value, ending balance								90.4
Investment Income	[8]							0.6
PIK Income	[8]							7.3
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners of America Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		130.5	130.5
Gross Additions	[4]							0.0
Gross Reductions	[6]							(214.3)
Net realized gain (loss) on investments:								130.7
Net change in unrealized appreciation (depreciation) on investments:								(46.9)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners of America Inc, Subordinated Debt | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							3.5
Gross Reductions	[6]							(3.5)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.1
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners of America Inc, Warrant, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		2.1	2.1
Gross Additions	[4]							0.0
Gross Reductions	[6]							(4.4)
Net realized gain (loss) on investments:								4.1
Net change in unrealized appreciation (depreciation) on investments:								(1.8)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock , Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					2.2
Fair Value, ending balance		2.2			2.2			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					122.6		0.0	0.0
Gross Additions	[4]							177.9
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(55.3)
Fair Value, ending balance								122.6
Investment Income	[8]							0.4
PIK Income	[8]							20.9
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		93.7	93.7
Gross Additions	[4]							0.0
Gross Reductions	[6]							(107.3)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								13.6
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							4.2
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					75.6		0.0	0.0
Gross Additions	[4]							78.0
Gross Reductions	[6]							(2.1)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.3)
Fair Value, ending balance								75.6
Investment Income	[8]							2.4
PIK Income	[8]							0.5
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant , Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					4.5		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.5
Fair Value, ending balance								4.5
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.4		0.0	0.0
Gross Additions	[4]							1.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								1.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.1
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					36.1		0.2	0.2
Gross Additions	[4]							34.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								1.5
Fair Value, ending balance								36.1
Investment Income	[8]							1.3
PIK Income	[8]							1.2
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					36.1
Gross Additions	[3]				39.8
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		75.9			75.9			36.1
Investment Income	[7]				4.8
PIK Income	[7]				1.9
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Kilter Finance, Private Equity | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.5		0.2	0.2
Gross Additions	[4]							0.3
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.5
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Kilter Finance, Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.5
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.5			0.5			0.5
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								0.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					11.9		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								11.9
Fair Value, ending balance								11.9
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.4		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.4
Fair Value, ending balance								0.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					6.2		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								6.2
Fair Value, ending balance								6.2
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: My Community Homes PropCo 2, Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					33.0
Gross Additions	[3]				157.0
Gross Reductions	[5]				(105.0)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		85.0			85.0			33.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: My Community Homes SFR PropCo 2, Private Equity | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					33.0		0.0	0.0
Gross Additions	[4]							33.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								33.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					5.0		0.0	0.0
Gross Additions	[4]							9.7
Gross Reductions	[6]							(5.1)
Net realized gain (loss) on investments:								0.1
Net change in unrealized appreciation (depreciation) on investments:								0.3
Fair Value, ending balance								5.0
Investment Income	[8]							0.3
PIK Income	[8]							0.0
Fee income	[8]							0.1
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc , Senior Secured Loans—First Lien | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					5.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(1.3)
Fair Value, ending balance		3.7			3.7			5.0
Investment Income	[7]				0.3
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					2.4		0.0	0.0
Gross Additions	[4]							4.5
Gross Reductions	[6]							(2.2)
Net realized gain (loss) on investments:								(0.2)
Net change in unrealized appreciation (depreciation) on investments:								0.3
Fair Value, ending balance								2.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		2.4	2.4
Gross Additions	[4]							0.0
Gross Reductions	[6]							(3.0)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.6
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					26.1		0.0	0.0
Gross Additions	[4]							48.6
Gross Reductions	[6]							(23.7)
Net realized gain (loss) on investments:								(2.1)
Net change in unrealized appreciation (depreciation) on investments:								3.3
Fair Value, ending balance								26.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		25.5	25.5
Gross Additions	[4]							0.0
Gross Reductions	[6]							(32.3)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								6.8
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.2		0.0	0.0
Gross Additions	[4]							15.7
Gross Reductions	[6]							(8.8)
Net realized gain (loss) on investments:								1.1
Net change in unrealized appreciation (depreciation) on investments:								1.2
Fair Value, ending balance								9.2
Investment Income	[8]							0.0
PIK Income	[8]							0.8
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		10.6	10.6
Gross Additions	[4]							0.0
Gross Reductions	[6]							(9.8)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.8)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.2
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(1.5)
Fair Value, ending balance		7.7			7.7			9.2
Investment Income	[7]				0.0
PIK Income	[7]				0.5
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK, Equity/Other | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					17.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					46.0
Fair Value, ending balance		63.4			63.4			17.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A , Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.4)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.4
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					(4.9)
Net change in unrealized appreciation (depreciation) on investments:					4.9
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Prime St LLC, Private Equity | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.1		3.9	3.9
Gross Additions	[4]							4.6
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.6
Fair Value, ending balance								9.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Prime St LLC, Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(9.1)
Fair Value, ending balance		0.0			0.0			9.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Prime St LLC, Structured Mezzanine | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.4		22.8	22.8
Gross Additions	[4]							27.6
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								2.0
Fair Value, ending balance								52.4
Investment Income	[8]							0.9
PIK Income	[8]							2.2
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Prime St LLC, Structured Mezzanine, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.4
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(4.8)
Fair Value, ending balance		47.7			47.7			52.4
Investment Income	[7]				2.6
PIK Income	[7]				2.4
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Production Resource Group LLC -1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					133.3		0.0	0.0
Gross Additions	[4]							124.9
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								8.4
Fair Value, ending balance								133.3
Investment Income	[8]							5.4
PIK Income	[8]							3.8
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC -2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1		0.0	0.0
Gross Additions	[4]							0.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC -3 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					64.4		0.0	0.0
Gross Additions	[4]							60.6
Gross Reductions	[6]							(0.4)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								4.2
Fair Value, ending balance								64.4
Investment Income	[8]							2.8
PIK Income	[8]							0.8
Fee income	[8]							0.4
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC -4 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					20.2		0.0	0.0
Gross Additions	[4]							20.2
Gross Reductions	[6]							(0.1)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								20.2
Investment Income	[8]							0.4
PIK Income	[8]							0.0
Fee income	[8]							0.1
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Preferred Stock, Series A PIK | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					17.4		0.0	0.0
Gross Additions	[4]							18.1
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.7)
Fair Value, ending balance								17.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Preferred Stock, Series B PIK | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien -4 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					20.2
Gross Additions	[3]				10.8
Gross Reductions	[5]				(0.2)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.3
Fair Value, ending balance		31.1			31.1			20.2
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units , Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1		9.0	9.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							(0.1)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(8.8)
Fair Value, ending balance								0.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.3
Fair Value, ending balance		0.5			0.5			0.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.3		9.5	9.5
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.2)
Fair Value, ending balance								9.3
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					199.3
Gross Additions	[3]				78.4
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(18.0)
Fair Value, ending balance		259.7			259.7			199.3
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				13.7
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Structured Mezzanine, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					22.0
Gross Additions	[3]				32.0
Gross Reductions	[5]				(54.0)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			22.0
Investment Income	[7]				0.0
PIK Income	[7]				0.6
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					67.5		0.0	0.0
Gross Additions	[4]							42.5
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								25.0
Fair Value, ending balance								67.5
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sorenson Communications LLC, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							22.0
Gross Reductions	[6]							(22.2)
Net realized gain (loss) on investments:								0.2
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.4
PIK Income	[8]							0.9
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sound United LLC | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		14.9	14.9
Gross Additions	[4]							0.0
Gross Reductions	[6]							(15.0)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								0.0
Investment Income	[8]							0.4
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sound United LLC, Class A Units | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(1.1)
Net change in unrealized appreciation (depreciation) on investments:								1.1
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sound United LLC, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					77.5		29.3	29.3
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								48.2
Fair Value, ending balance								77.5
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							20.0
Investment, Identifier [Axis]: Sound United LLC, Series I Units | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(0.5)
Net change in unrealized appreciation (depreciation) on investments:								0.5
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sound United LLC, Series II Units | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(0.5)
Net change in unrealized appreciation (depreciation) on investments:								0.5
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							6.9
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(6.9)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					8.3		0.0	0.0
Gross Additions	[4]							13.6
Gross Reductions	[6]							0.1
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(5.4)
Fair Value, ending balance								8.3
Investment Income	[8]							0.7
PIK Income	[8]							0.2
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.7		6.6	6.6
Gross Additions	[4]							1.3
Gross Reductions	[6]							(4.9)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(1.3)
Fair Value, ending balance								1.7
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest, Asset Based Finance | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.7
Gross Additions	[3]				0.0
Gross Reductions	[5]				(1.7)
Net realized gain (loss) on investments:					(0.2)
Net change in unrealized appreciation (depreciation) on investments:					0.2
Fair Value, ending balance		$ 0.0			0.0			1.7
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.3
Investment, Identifier [Axis]: Toorak Capital LLC, Membership Interest | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					199.3		235.9	235.9
Gross Additions	[4]							2.3
Gross Reductions	[6]							(50.2)
Net realized gain (loss) on investments:								10.2
Net change in unrealized appreciation (depreciation) on investments:								1.1
Fair Value, ending balance								199.3
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							18.7
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					22.0		0.0	0.0
Gross Additions	[4]							73.0
Gross Reductions	[6]							(51.0)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								22.0
Investment Income	[8]							0.2
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Warren Resources Inc | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					18.7		0.0	0.0
Gross Additions	[4]							19.3
Gross Reductions	[6]							(2.0)
Net realized gain (loss) on investments:								0.1
Net change in unrealized appreciation (depreciation) on investments:								1.3
Fair Value, ending balance								18.7
Investment Income	[8]							1.3
PIK Income	[8]							0.1
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					$ 20.4		0.0	0.0
Gross Additions	[4]							12.8
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								7.6
Fair Value, ending balance								20.4
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[11],[12],[13]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[14],[15]	$ 92.9			$ 92.9
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2026
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				9.1
Fair Value, ending balance	[17],[18]							$ 9.1
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21]				95.3
Fair Value, ending balance	[18],[19],[20],[21]							$ 95.3
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 30.2
Fair Value, ending balance	[17],[18]							$ 30.2
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 5.5			$ 5.5
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 8.9			$ 8.9
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 24.2			$ 24.2
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25]	$ 179.1			$ 179.1
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 7.3			$ 7.3
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 3.1			$ 3.1
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[27],[28],[29],[30]				78.3
Fair Value, ending balance	[18],[26],[27],[28],[29],[30]							78.3
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC, Senior Secured Loans - First Lien, Diversified Financials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[31],[32],[33],[34],[35]	62.4			62.4
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				23.1
Fair Value, ending balance	[18],[29],[30],[36],[37]							$ 23.1
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	$ 14.3			14.3
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine
Derivative [Line Items]
Variable rate	[16],[30],[36],[37]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37]				$ 57.2
Fair Value, ending balance	[18],[30],[36],[37]							$ 57.2
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Asset Based Finance, Real Estate
Derivative [Line Items]
Variable rate	[10],[22],[35],[38]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38]	$ 57.2			$ 57.2
Investment, Identifier [Axis]: ATX Networks Corp
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[30],[36],[37],[39]				7.1
Fair Value, ending balance	[18],[26],[29],[30],[36],[37],[39]							7.1
Investment, Identifier [Axis]: ATX Networks Corp | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.1		0.0	0.0
Gross Additions	[4]							4.8
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								2.3
Fair Value, ending balance								7.1
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ATX Networks Corp , Senior Secured Loans—First Lien | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					46.8
Gross Additions	[3]				0.4
Gross Reductions	[5]				(6.1)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		41.1			41.1			46.8
Investment Income	[7]				2.0
PIK Income	[7]				1.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: ATX Networks Corp 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37],[39]				46.8
Fair Value, ending balance	[18],[30],[36],[37],[39]							46.8
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37],[39]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37],[39]							0.0
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38],[40],[41]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: ATX Networks Corp, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[35],[38],[41]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38],[41]	$ 41.1			$ 41.1
Investment, Identifier [Axis]: ATX Networks Corp, Subordinated Debt | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.1
Gross Additions	[3]				3.3
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					6.2
Fair Value, ending balance		16.6			16.6			7.1
Investment Income	[7]				2.2
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: ATX Networks Corp, Subordinated Debt, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38],[40],[41]	16.6			16.6
Investment, Identifier [Axis]: AVF Parent LLC, Trade Claim
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: AVF Parent LLC, Trade Claim, Equity/Other, Retailing
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.0			0.0
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.3
Fair Value, ending balance	[18],[29],[37]							0.3
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.4			0.4
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				1.7
Fair Value, ending balance	[18],[29],[37]							1.7
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	2.5			2.5
Investment, Identifier [Axis]: Abacus JV, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				48.1
Fair Value, ending balance	[18],[30],[37]							48.1
Investment, Identifier [Axis]: Abacus JV, Private Equity, Asset Based Finance, Insurance
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	52.3			52.3
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				4.7
Fair Value, ending balance	[18],[29],[30],[37]							$ 4.7
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, Private Equity, Asset Based Finance, Diversified Financials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35]	$ 3.0			3.0
Investment, Identifier [Axis]: Accuride Corp
Derivative [Line Items]
Variable rate	[16],[29],[42]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[42]				$ 8.7
Fair Value, ending balance	[18],[20],[42]							$ 8.7
Investment, Identifier [Axis]: Accuride Corp, Senior Secured Loans - First Lien 1, Capital Goods
Derivative [Line Items]
Variable rate	[10],[13],[43]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[13],[15],[43]	$ 7.7			$ 7.7
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2026
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.6
Fair Value, ending balance	[17],[18]							$ 3.6
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027 - 1
Derivative [Line Items]
Variable rate	[16],[37],[44],[45]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[44],[45]				45.0
Fair Value, ending balance	[18],[37],[44],[45]							$ 45.0
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027- 2
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 4.2
Fair Value, ending balance	[17],[18]							$ 4.2
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 3.5			$ 3.5
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[25],[46]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[25],[46]	$ 38.3			$ 38.3
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 7.8			$ 7.8
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 2.2			$ 2.2
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					$ 0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							(0.7)
Net realized gain (loss) on investments:								(22.9)
Net change in unrealized appreciation (depreciation) on investments:								23.6
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans -Second Lien, Materials
Derivative [Line Items]
Variable rate	[10],[22],[31],[34]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34]	$ 3.2			$ 3.2
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans, Second Lien
Derivative [Line Items]
Variable rate	[16],[26],[29],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37]				$ 6.4
Fair Value, ending balance	[18],[26],[29],[37]							$ 6.4
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.10%			6.10%					6.10%	6.10%	6.10%	6.10%	6.10%	6.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 81.2			$ 81.2
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.10%			6.10%					6.10%	6.10%	6.10%	6.10%	6.10%	6.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 9.1			$ 9.1
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 - 1
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.10%								6.10%	6.10%	6.10%	6.10%	6.10%	6.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				68.9
Fair Value, ending balance	[18],[30],[37]							$ 68.9
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -2
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.10%								6.10%	6.10%	6.10%	6.10%	6.10%	6.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				10.3
Fair Value, ending balance	[18],[30],[37]							$ 10.3
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -3
Derivative [Line Items]
Variable rate	[16],[17],[30]							6.10%								6.10%	6.10%	6.10%	6.10%	6.10%	6.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				37.2
Fair Value, ending balance	[17],[18],[30]							$ 37.2
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				52.1
Fair Value, ending balance	[18],[37],[47]							52.1
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					52.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(2.1)
Fair Value, ending balance		50.0			50.0			52.1
Investment Income	[7]				0.0
PIK Income	[7]				4.1
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 50.0			$ 50.0
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[46],[48]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46],[48]	$ 38.3			$ 38.3
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[22],[48]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 10.2			$ 10.2
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23],[48]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[48]	$ 12.7			$ 12.7
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	32.8			32.8
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions					0.0	[3]		0.0	[4]
Gross Reductions					0.0	[5]		0.0	[6]
Net realized gain (loss) on investments:					0.0			0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0			0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.0	[7]		0.3	[8]
Dividend and other income					0.0	[7]		0.0	[8]
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					59.9		0.0	0.0
Gross Additions					10.0	[3]		115.5	[4]
Gross Reductions					(21.2)	[5]		(55.9)	[6]
Net realized gain (loss) on investments:					0.0			0.3
Net change in unrealized appreciation (depreciation) on investments:					(0.7)			0.0
Fair Value, ending balance		$ 48.0			48.0			59.9
Investment Income					2.7	[7]		2.7	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.2	[7]		1.6	[8]
Dividend and other income					0.0	[7]		$ 0.0	[8]
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2027
Derivative [Line Items]
Variable rate	[16],[17],[47]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[47]				12.8
Fair Value, ending balance	[17],[18],[47]							$ 12.8
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -1
Derivative [Line Items]
Variable rate	[16],[37],[47]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				60.1
Fair Value, ending balance	[18],[37],[47]							$ 60.1
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -2
Derivative [Line Items]
Variable rate	[16],[17],[47]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[47]				42.9
Fair Value, ending balance	[17],[18],[47]							$ 42.9
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				1.1
Fair Value, ending balance	[18],[37]							$ 1.1
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027-2
Derivative [Line Items]
Variable rate	[16],[17]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				9.5
Fair Value, ending balance	[17],[18]							$ 9.5
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2028
Derivative [Line Items]
Variable rate	[16],[37]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 68.2
Fair Value, ending balance	[18],[37]							$ 68.2
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, , Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[23]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.4			$ 7.4
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.0			$ 3.0
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[22]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 27.6			$ 27.6
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				21.2
Fair Value, ending balance	[18],[37]							$ 21.2
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 22.7
Fair Value, ending balance	[17],[18]							$ 22.7
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 8.8			$ 8.8
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 16.4			$ 16.4
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 5.4			$ 5.4
Investment, Identifier [Axis]: Altavair AirFinance, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				114.3
Fair Value, ending balance	[18],[30],[37]							114.3
Investment, Identifier [Axis]: Altavair AirFinance, Private Equity, Asset Based Finance, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	135.1			135.1
Investment, Identifier [Axis]: American Vision Partners, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				2.4
Fair Value, ending balance	[18],[29],[37]							$ 2.4
Investment, Identifier [Axis]: American Vision Partners, Private Equity, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 2.0			$ 2.0
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[11],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22]	$ 72.6			$ 72.6
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 37.9			$ 37.9
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2026
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				7.7
Fair Value, ending balance	[17],[18]							$ 7.7
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -1
Derivative [Line Items]
Variable rate	[16],[21],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37]				94.3
Fair Value, ending balance	[18],[21],[37]							$ 94.3
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 38.7
Fair Value, ending balance	[17],[18]							$ 38.7
Investment, Identifier [Axis]: American Vision Partners,, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.6			$ 7.6
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 12.1			$ 12.1
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 0.8			$ 0.8
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 98.4			$ 98.4
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.4			$ 7.4
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 4
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 59.6			$ 59.6
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV
Derivative [Line Items]
Variable rate	[16],[30],[37],[39],[49]							7.75%								7.75%	7.75%	7.75%	7.75%	7.75%	7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[39],[49]				$ 44.3
Fair Value, ending balance	[18],[30],[37],[39],[49]							$ 44.3
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV, Senior Secured Loans -Second Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[24],[35],[41]	7.75%			7.75%					7.75%	7.75%	7.75%	7.75%	7.75%	7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[35],[41]	$ 23.2			$ 23.2
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd
Derivative [Line Items]
Variable rate	[16],[26],[29],[30],[36],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[26],[29],[30],[36],[37]							$ 0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.1	0.1
Gross Additions	[4]							(1.8)
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(10.4)
Net change in unrealized appreciation (depreciation) on investments:								12.1
Fair Value, ending balance								0.0
Investment Income	[8]							(1.9)
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[30],[36],[37]				34.8
Fair Value, ending balance	[18],[26],[29],[30],[36],[37]							34.8
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37],[50]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37],[50]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock, Equity/Other, Automobiles & Components
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38],[51]	0.0			0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares, Equity/Other, Automobiles & Components
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity, Equity/Other, Automobiles & Components
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Angelica Corp
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[52]				5.2
Fair Value, ending balance	[18],[26],[29],[52]							5.2
Investment, Identifier [Axis]: Angelica Corp, Limited Partnership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[52]				0.0
Fair Value, ending balance	[18],[29],[52]							$ 0.0
Investment, Identifier [Axis]: Angelica Corp, Limited Partnership Interest, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[53]	0.0			0.0
Investment, Identifier [Axis]: Angelica Corp, Other Senior Debt, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[31],[34],[53]	$ 0.9			0.9
Investment, Identifier [Axis]: Apex Group Limited
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 8.0
Fair Value, ending balance	[18],[30],[37]							$ 8.0
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans - First Lien, Diversified Financials 1
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	3.75%			3.75%					3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 2.4			$ 2.4
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans - First Lien, Diversified Financials 2
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	4.00%			4.00%					4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 1.9			$ 1.9
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans -Second Lien, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 53.4			$ 53.4
Investment, Identifier [Axis]: Arcfield Acquisition Group, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[11],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22]	$ 39.6			$ 39.6
Investment, Identifier [Axis]: Arcfield Acquisition Group, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.9			$ 6.9
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				15.5
Fair Value, ending balance	[18],[37]							$ 15.5
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 13.7			$ 13.7
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[46]	$ 11.8			$ 11.8
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.3			$ 4.3
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing April 20, 2027
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				4.5
Fair Value, ending balance	[17],[18]							$ 4.5
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing March 31, 2028
Derivative [Line Items]
Variable rate	[16],[45]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[45]				12.4
Fair Value, ending balance	[18],[45]							$ 12.4
Investment, Identifier [Axis]: Ardonagh Group Ltd
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[42]				$ 1.0
Fair Value, ending balance	[18],[30],[37],[42]							$ 1.0
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 0.9			$ 0.9
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 21.9			$ 21.9
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 - 3
Derivative [Line Items]
Variable rate	[16],[17],[30]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				22.1
Fair Value, ending balance	[17],[18],[30]							$ 22.1
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -1
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				1.1
Fair Value, ending balance	[18],[30],[37]							$ 1.1
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -2
Derivative [Line Items]
Variable rate	[16],[30],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				13.9
Fair Value, ending balance	[18],[30],[37]							$ 13.9
Investment, Identifier [Axis]: Ardonagh Group Ltd, Subordinated Debt, Insurance
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	1.0			1.0
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Equity/Other, Insurance -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				2.8
Fair Value, ending balance	[18],[29],[30],[37]							2.8
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Equity/Other, Insurance -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				0.5
Fair Value, ending balance	[18],[29],[30],[37]							0.5
Investment, Identifier [Axis]: Ardonagh Ltd, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				22.0
Fair Value, ending balance	[18],[29],[30],[37]							22.0
Investment, Identifier [Axis]: Arena Energy LP, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.6
Fair Value, ending balance	[18],[29],[37]							$ 0.6
Investment, Identifier [Axis]: Arena Energy LP, Warrants, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 0.5			0.5
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -1
Derivative [Line Items]
Variable rate	[16],[30],[37]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				30.9
Fair Value, ending balance	[18],[30],[37]							$ 30.9
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -2
Derivative [Line Items]
Variable rate	[16],[30],[37]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 2.3
Fair Value, ending balance	[18],[30],[37]							$ 2.3
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 27.4			$ 27.4
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 2.0			$ 2.0
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[54]				2.3
Fair Value, ending balance	[18],[29],[54]							2.3
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[55]	2.8			2.8
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Trade Claim 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[54]				19.8
Fair Value, ending balance	[18],[29],[54]							19.8
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Trade Claim, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[55]	23.5			23.5
Investment, Identifier [Axis]: Aspect Software Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				0.3
Fair Value, ending balance	[18],[37]							0.3
Investment, Identifier [Axis]: Aspect Software Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[29],[37],[39]				2.7
Fair Value, ending balance	[18],[20],[29],[37],[39]							2.7
Investment, Identifier [Axis]: Aspect Software Inc, Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[29],[37],[39]				0.3
Fair Value, ending balance	[18],[20],[29],[37],[39]							0.3
Investment, Identifier [Axis]: Australis Maritime, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				46.7
Fair Value, ending balance	[18],[30],[37]							46.7
Investment, Identifier [Axis]: Australis Maritime, Common Stock, Asset Based Finance, Transportation
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	43.6			43.6
Investment, Identifier [Axis]: Avenue One PropCo, Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	41.3			41.3
Investment, Identifier [Axis]: Avida Holding AB, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				52.3
Fair Value, ending balance	[18],[29],[30],[36],[37]							$ 52.3
Investment, Identifier [Axis]: Avida Holding AB, Common Stock, Asset Based Finance, Diversified Financials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	$ 37.7			$ 37.7
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[24],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[25],[46]	$ 34.1			$ 34.1
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 2.4			$ 2.4
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 2.2			$ 2.2
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2025
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				2.4
Fair Value, ending balance	[17],[18]							$ 2.4
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027 -1
Derivative [Line Items]
Variable rate	[16],[37],[44],[45],[49]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[44],[45],[49]				34.4
Fair Value, ending balance	[18],[37],[44],[45],[49]							$ 34.4
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027- 2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 2.2
Fair Value, ending balance	[17],[18]							$ 2.2
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 1
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[24],[25],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[24],[25],[46]	$ 109.7			$ 109.7
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 19.6			$ 19.6
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[44],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[44],[45],[49]				118.0
Fair Value, ending balance	[18],[19],[20],[21],[37],[44],[45],[49]							$ 118.0
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				19.8
Fair Value, ending balance	[17],[18]							$ 19.8
Investment, Identifier [Axis]: Bank of Ireland, Class B Credit Linked Floating Rate Note
Derivative [Line Items]
Variable rate	[16],[30],[50]							11.85%								11.85%	11.85%	11.85%	11.85%	11.85%	11.85%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[50]				$ 14.7
Fair Value, ending balance	[18],[30],[50]							$ 14.7
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans - First Lien, Consumer Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25],[46]	$ 132.1			$ 132.1
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans - First Lien, Consumer Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 9.1			$ 9.1
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 28, 2028
Derivative [Line Items]
Variable rate	[16],[19],[20]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45],[49]				92.4
Fair Value, ending balance	[18],[19],[20],[37],[44],[45],[49]							$ 92.4
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 - 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20]				34.8
Fair Value, ending balance	[18],[19],[20]							$ 34.8
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				14.6
Fair Value, ending balance	[17],[18]							$ 14.6
Investment, Identifier [Axis]: Belk Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				6.7
Fair Value, ending balance	[18],[26],[29],[37],[47]							6.7
Investment, Identifier [Axis]: Belk Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Belk Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Belk Inc, Common Stock, Equity/Other, Retailing
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans - First Lien, Retailing 1
Derivative [Line Items]
Variable rate	[10],[22],[43],[48]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43],[48]	$ 19.6			$ 19.6
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans - First Lien, Retailing 2
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[43],[48]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[43],[48]	$ 12.9			$ 12.9
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans -Second Lien, Retailing
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[48]	3.7			3.7
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien - 1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					49.2
Gross Additions	[3]				4.5
Gross Reductions	[5]				(1.0)
Net realized gain (loss) on investments:					(0.2)
Net change in unrealized appreciation (depreciation) on investments:					(39.6)
Fair Value, ending balance		12.9			12.9			49.2
Investment Income	[7]				3.7
PIK Income	[7]				2.7
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien - 2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					21.9
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(2.4)
Fair Value, ending balance		19.6			19.6			21.9
Investment Income	[7]				1.5
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					49.2		0.0	0.0
Gross Additions	[4]							42.6
Gross Reductions	[6]							(2.4)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								9.0
Fair Value, ending balance								49.2
Investment Income	[8]							3.1
PIK Income	[8]							0.9
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					21.9		0.0	0.0
Gross Additions	[4]							21.7
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.2
Fair Value, ending balance								21.9
Investment Income	[8]							1.6
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -1
Derivative [Line Items]
Variable rate	[16],[37],[42],[47]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[47]				21.9
Fair Value, ending balance	[18],[37],[42],[47]							$ 21.9
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -2
Derivative [Line Items]
Variable rate	[16],[37],[42],[47]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[47]				49.2
Fair Value, ending balance	[18],[37],[42],[47]							$ 49.2
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					6.7
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(3.0)
Fair Value, ending balance		3.7			3.7			$ 6.7
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco) 1
Derivative [Line Items]
Variable rate	[16],[37],[47]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				42.0
Fair Value, ending balance	[18],[37],[47]							$ 42.0
Investment, Identifier [Axis]: Borden (New Dairy Opco) 2
Derivative [Line Items]
Variable rate	[16],[37],[47]							2.50%								2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				9.0
Fair Value, ending balance	[18],[37],[47]							$ 9.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[47],[52],[56]				7.7
Fair Value, ending balance	[18],[29],[47],[52],[56]							7.7
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					7.7
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(2.8)
Fair Value, ending balance		4.9			4.9			7.7
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock, Equity/Other, Food, Beverage & Tobacco
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[48],[53],[57]	4.9			4.9
Investment, Identifier [Axis]: Borden (New Dairy Opco), Senior Secured Loans—First Lien - 1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				(9.0)
Net realized gain (loss) on investments:					0.6
Net change in unrealized appreciation (depreciation) on investments:					(0.6)
Fair Value, ending balance		0.0			0.0			9.0
Investment Income	[7]				0.1
PIK Income	[7]				0.0
Fee income	[7]				0.3
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Senior Secured Loans—First Lien - 2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					42.0
Gross Additions	[3]				0.1
Gross Reductions	[5]				(42.0)
Net realized gain (loss) on investments:					1.7
Net change in unrealized appreciation (depreciation) on investments:					(1.8)
Fair Value, ending balance		0.0			0.0			42.0
Investment Income	[7]				0.9
PIK Income	[7]				0.0
Fee income	[7]				1.3
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Senior Secured Loans—First Lien -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.0		7.6	7.6
Gross Additions	[4]							10.6
Gross Reductions	[6]							(10.0)
Net realized gain (loss) on investments:								0.2
Net change in unrealized appreciation (depreciation) on investments:								0.6
Fair Value, ending balance								9.0
Investment Income	[8]							0.5
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Borden (New Dairy Opco), Senior Secured Loans—First Lien -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					42.0		16.8	16.8
Gross Additions	[4]							23.4
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								1.8
Fair Value, ending balance								42.0
Investment Income	[8]							2.7
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: Borden Dairy Co
Derivative [Line Items]
Variable rate	[16],[26],[29],[37],[47]							8.25%								8.25%	8.25%	8.25%	8.25%	8.25%	8.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[26],[29],[37],[47]							$ 0.0
Investment, Identifier [Axis]: Borden Dairy Co, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions					0.0	[3]		0.0	[4]
Gross Reductions					0.0	[5]		0.0	[6]
Net realized gain (loss) on investments:					(25.4)			1.3
Net change in unrealized appreciation (depreciation) on investments:					25.4			(1.3)
Fair Value, ending balance		$ 0.0			0.0			0.0
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					0.0	[7]		$ 0.0	[8]
Investment, Identifier [Axis]: Bowery Farming Inc
Derivative [Line Items]
Variable rate	[16],[37]							10.00%								10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 69.3
Fair Value, ending balance	[18],[37]							$ 69.3
Investment, Identifier [Axis]: Bowery Farming Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco
Derivative [Line Items]
Variable rate	[10],[22]	10.00%			10.00%					10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 70.0			$ 70.0
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				5.2
Fair Value, ending balance	[18],[29],[37]							$ 5.2
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants, Equity/Other, Food, Beverage & Tobacco
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 3.0			3.0
Investment, Identifier [Axis]: Byrider Finance LLC
Derivative [Line Items]
Variable rate	[16],[37],[58]							10.00%								10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[58]				$ 54.4
Fair Value, ending balance	[18],[37],[58]							$ 54.4
Investment, Identifier [Axis]: Byrider Finance LLC, Senior Secured Loans -Second Lien, Automobiles & Components
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[59]	16.00%			16.00%					16.00%	16.00%	16.00%	16.00%	16.00%	16.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[59]	$ 14.8			$ 14.8
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine
Derivative [Line Items]
Variable rate	[16],[17]							10.50%								10.50%	10.50%	10.50%	10.50%	10.50%	10.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 23.0
Fair Value, ending balance	[17],[18]							$ 23.0
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Asset Based Finance, Automobiles & Components 1
Derivative [Line Items]
Variable rate	[10],[22]	10.50%			10.50%					10.50%	10.50%	10.50%	10.50%	10.50%	10.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 10.6			$ 10.6
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Asset Based Finance, Automobiles & Components 2
Derivative [Line Items]
Variable rate	[10],[23]	10.50%			10.50%					10.50%	10.50%	10.50%	10.50%	10.50%	10.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 12.3			$ 12.3
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[37]							$ 0.0
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Warrant, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[43]	$ 5.8			$ 5.8
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 38.3			$ 38.3
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 5.6			$ 5.6
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 30.3			$ 30.3
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[24],[25],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[24],[25],[46]	$ 187.3			$ 187.3
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 11.8			$ 11.8
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 4
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 34.7			$ 34.7
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, August 13, 2028
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				11.9
Fair Value, ending balance	[18],[37]							$ 11.9
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2026
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				34.6
Fair Value, ending balance	[17],[18]							$ 34.6
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[44],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[44],[45],[49]				188.7
Fair Value, ending balance	[18],[19],[20],[21],[37],[44],[45],[49]							$ 188.7
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -2
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				37.1
Fair Value, ending balance	[18],[37]							$ 37.1
Investment, Identifier [Axis]: CTI Foods Holding Co LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: CTI Foods Holding Co LLC, Common Stock, Equity/Other, Food, Beverage & Tobacco
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans - First Lien, Retailing
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	3.75%			3.75%					3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 1.3			$ 1.3
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans - First Lien, Retailing 1
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	3.50%			3.50%					3.50%	3.50%	3.50%	3.50%	3.50%	3.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 0.7			$ 0.7
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans -Second Lien, Retailing
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 38.4			$ 38.4
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan A
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 125.6
Fair Value, ending balance	[18],[37]							125.6
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan A, Asset Based Finance, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[22]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 126.0			$ 126.0
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 40.5
Fair Value, ending balance	[17],[18]							40.5
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Asset Based Finance, Diversified Financials 1
Derivative [Line Items]
Variable rate	[10],[22]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 12.1			$ 12.1
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Asset Based Finance, Diversified Financials 2
Derivative [Line Items]
Variable rate	[10],[23]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 36.3			$ 36.3
Investment, Identifier [Axis]: Capital Automotive LP, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				28.1
Fair Value, ending balance	[18],[30],[37]							$ 28.1
Investment, Identifier [Axis]: Capital Automotive LP, Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 27.2			27.2
Investment, Identifier [Axis]: Capital Automotive LP, Structured Mezzanine
Derivative [Line Items]
Variable rate	[16],[30],[37]							11.00%								11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 42.7
Fair Value, ending balance	[18],[30],[37]							$ 42.7
Investment, Identifier [Axis]: Capital Automotive LP, Structured Mezzanine, Asset Based Finance, Real Estate
Derivative [Line Items]
Variable rate	[10],[22],[35]	11.00%			11.00%					11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 42.7			$ 42.7
Investment, Identifier [Axis]: Catalina Marketing Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Catalina Marketing Corp, Common Stock, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.0			0.0
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				4.2
Fair Value, ending balance	[18],[29],[37]							$ 4.2
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	3.5			3.5
Investment, Identifier [Axis]: Cimarron Energy Inc
Derivative [Line Items]
Variable rate	[16],[26],[29],[37]							9.00%								9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37]				3.6
Fair Value, ending balance	[18],[26],[29],[37]							$ 3.6
Investment, Identifier [Axis]: Cimarron Energy Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Cimarron Energy Inc, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.0			0.0
Investment, Identifier [Axis]: Cimarron Energy Inc, Participation Option
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							$ 0.0
Investment, Identifier [Axis]: Cimarron Energy Inc, Participation Option, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Cimarron Energy Inc, Senior Secured Loans - First Lien, Energy
Derivative [Line Items]
Variable rate	[10],[22],[31],[34]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34]	$ 3.5			$ 3.5
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.8			$ 1.8
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[11],[12],[22],[24],[41],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[15],[22],[24],[41],[46]	$ 292.1			$ 292.1
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 23.4			$ 23.4
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 13, 2024
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				25.4
Fair Value, ending balance	[17],[18]							$ 25.4
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 14, 2026
Derivative [Line Items]
Variable rate	[16],[19],[21],[37],[39],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[21],[37],[39],[45],[49]				270.7
Fair Value, ending balance	[18],[19],[21],[37],[39],[45],[49]							$ 270.7
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -1
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				18.4
Fair Value, ending balance	[18],[37]							$ 18.4
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -2
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				11.1
Fair Value, ending balance	[17],[18]							$ 11.1
Investment, Identifier [Axis]: ClubCorp Club Operations Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				$ 35.7
Fair Value, ending balance	[18],[37],[42]							$ 35.7
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 31.9			$ 31.9
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 3.8			$ 3.8
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.9			$ 1.9
Investment, Identifier [Axis]: Constellis Holdings LLC
Derivative [Line Items]
Variable rate	[16],[37],[47],[49]							11.00%								11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47],[49]				12.0
Fair Value, ending balance	[18],[37],[47],[49]							$ 12.0
Investment, Identifier [Axis]: Constellis Holdings LLC , Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					12.0		0.0	0.0
Gross Additions	[4]							12.5
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.5)
Fair Value, ending balance								12.0
Investment Income	[8]							0.6
PIK Income	[8]							0.4
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: Constellis Holdings LLC 1
Derivative [Line Items]
Variable rate	[16],[37],[47]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				15.0
Fair Value, ending balance	[18],[37],[47]							$ 15.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47],[49]				0.2
Fair Value, ending balance	[18],[29],[37],[47],[49]							0.2
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.2
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					5.7
Fair Value, ending balance		5.9			5.9			0.2
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[34],[48]	$ 5.9			$ 5.9
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[48]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 15.0			$ 15.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans -Second Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[48]	11.00%			11.00%					11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 13.5			$ 13.5
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					15.0
Gross Additions	[3]				0.3
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.3)
Fair Value, ending balance		15.0			15.0			15.0
Investment Income	[7]				1.3
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					15.0		0.0	0.0
Gross Additions	[4]							14.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								1.0
Fair Value, ending balance								15.0
Investment Income	[8]							0.9
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					12.0
Gross Additions	[3]				0.2
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					1.3
Fair Value, ending balance		$ 13.5			13.5			$ 12.0
Investment Income	[7]				1.4
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				$ 0.0
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 29.8			$ 29.8
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.4			$ 4.4
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37],[45]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				30.1
Fair Value, ending balance	[18],[37],[45]							$ 30.1
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				4.4
Fair Value, ending balance	[17],[18]							$ 4.4
Investment, Identifier [Axis]: Credit Opportunities Partners JV, LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37]				1,396.2
Fair Value, ending balance		1,466.1	[15],[22],[35],[38]		1,466.1	[15],[22],[35],[38]		1,396.2	[18],[30],[36],[37]
Investment, Identifier [Axis]: Credit Opportunities Partners JV, LLC | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1,396.2		712.5	712.5
Gross Additions					175.0	[3]		586.4	[4]
Gross Reductions					0.0	[5]		0.0	[6]
Net realized gain (loss) on investments:					0.0			0.0
Net change in unrealized appreciation (depreciation) on investments:					(105.1)			97.3
Fair Value, ending balance		1,466.1			1,466.1			1,396.2
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					153.4	[7]		$ 126.9	[8]
Investment, Identifier [Axis]: Cubic Corp
Derivative [Line Items]
Variable rate	[16],[37]							7.63%								7.63%	7.63%	7.63%	7.63%	7.63%	7.63%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				55.6
Fair Value, ending balance	[18],[37]							$ 55.6
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				42.3
Fair Value, ending balance	[18],[37]							$ 42.3
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 35.1			$ 35.1
Investment, Identifier [Axis]: Cubic Corp, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22]	7.63%			7.63%					7.63%	7.63%	7.63%	7.63%	7.63%	7.63%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 41.0			$ 41.0
Investment, Identifier [Axis]: Datatel Inc
Derivative [Line Items]
Variable rate	[16],[37]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 184.6
Fair Value, ending balance	[18],[37]							$ 184.6
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[12],[22],[24],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[15],[22],[24],[25],[46]	$ 129.5			$ 129.5
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.0			$ 6.0
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1
Derivative [Line Items]
Variable rate	[16],[19],[37],[44],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[37],[44],[45],[49]				90.4
Fair Value, ending balance	[18],[19],[37],[44],[45],[49]							$ 90.4
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				8.7
Fair Value, ending balance	[18],[37]							$ 8.7
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				13.7
Fair Value, ending balance	[17],[18]							$ 13.7
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc
Derivative [Line Items]
Variable rate	[16],[30],[37],[42]							3.50%								3.50%	3.50%	3.50%	3.50%	3.50%	3.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[42]				$ 1.9
Fair Value, ending balance	[18],[30],[37],[42]							$ 1.9
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	4.25%			4.25%					4.25%	4.25%	4.25%	4.25%	4.25%	4.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 0.3			$ 0.3
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	4.25%			4.25%					4.25%	4.25%	4.25%	4.25%	4.25%	4.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 1.3			$ 1.3
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans -Second Lien, Commercial & Professional Services
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 5.3			$ 5.3
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Subordinated Debt, Commercial & Professional Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 63.2			$ 63.2
Investment, Identifier [Axis]: Ellucian Inc, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 178.1			$ 178.1
Investment, Identifier [Axis]: Encora Digital Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 20.9
Fair Value, ending balance	[18],[37]							$ 20.9
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 62.1			$ 62.1
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 18.7			$ 18.7
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				79.7
Fair Value, ending balance	[18],[37]							$ 79.7
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				19.2
Fair Value, ending balance	[17],[18]							$ 19.2
Investment, Identifier [Axis]: Encora Digital Inc, Subordinated Debt, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	21.4			21.4
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				0.4
Fair Value, ending balance	[18],[37]							$ 0.4
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				9.9
Fair Value, ending balance	[17],[18]							$ 9.9
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2025
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[45],[49]				61.7
Fair Value, ending balance	[18],[19],[20],[37],[45],[49]							$ 61.7
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series A Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[39]				0.0
Fair Value, ending balance	[18],[29],[39]							0.0
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series A Warrant, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[41]	0.0			0.0
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series B Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[39]				0.0
Fair Value, ending balance	[18],[29],[39]							0.0
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series B Warrant, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[41]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Envirotainer Ltd, Senior Secured Loans - First Lien, Transportation
Derivative [Line Items]
Variable rate	[10],[23],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 2.7			$ 2.7
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.0			$ 1.0
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 2
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.9			$ 3.9
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.4			$ 1.4
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 4
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.7			$ 4.7
Investment, Identifier [Axis]: Fairway Group Holdings Corp
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[26],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien - 1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.7
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					(1.0)
Net change in unrealized appreciation (depreciation) on investments:					0.3
Fair Value, ending balance		0.0			0.0			0.7
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien - 2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.7		0.0	0.0
Gross Additions	[4]							1.1
Gross Reductions	[6]							(0.7)
Net realized gain (loss) on investments:								0.6
Net change in unrealized appreciation (depreciation) on investments:								(0.3)
Fair Value, ending balance								0.7
Investment Income	[8]							0.8
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 27, 2023
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				0.7
Fair Value, ending balance	[18],[26],[29],[37],[47]							0.7
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 28, 2023
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[26],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		$ 0.0			0.0			$ 0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				$ 0.0
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[24],[25]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[24],[25]	$ 72.3			$ 72.3
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 9.7			$ 9.7
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2027t 2027
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				9.8
Fair Value, ending balance	[17],[18]							$ 9.8
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2028
Derivative [Line Items]
Variable rate	[16]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[44],[49]				$ 74.1
Fair Value, ending balance	[18],[19],[20],[44],[49]							$ 74.1
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 86.5			$ 86.5
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.6			$ 6.6
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -1
Derivative [Line Items]
Variable rate	[16],[37],[45]							6.38%								6.38%	6.38%	6.38%	6.38%	6.38%	6.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				98.0
Fair Value, ending balance	[18],[37],[45]							$ 98.0
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -2
Derivative [Line Items]
Variable rate	[16],[17]							6.38%								6.38%	6.38%	6.38%	6.38%	6.38%	6.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 6.6
Fair Value, ending balance	[17],[18]							$ 6.6
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 0.4			$ 0.4
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 64.0			$ 64.0
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 13.9			$ 13.9
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 4
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.4			$ 6.4
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2027
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				6.9
Fair Value, ending balance	[17],[18]							$ 6.9
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				73.3
Fair Value, ending balance	[18],[37]							$ 73.3
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				6.1
Fair Value, ending balance	[17],[18]							$ 6.1
Investment, Identifier [Axis]: Fox Head Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[60]				10.9
Fair Value, ending balance	[18],[29],[37],[60]							$ 10.9
Investment, Identifier [Axis]: Fox Head Inc, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22]	$ 0.6			$ 0.6
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[11],[22],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22],[46]	$ 22.9			$ 22.9
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[41]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[41]	$ 26.9			$ 26.9
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 11.0			$ 11.0
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[21],[37],[45]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[45]				78.7
Fair Value, ending balance	[18],[21],[37],[45]							$ 78.7
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[37],[39]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39]				76.2
Fair Value, ending balance	[18],[37],[39]							$ 76.2
Investment, Identifier [Axis]: Fronton BV, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[47],[61]				1.4
Fair Value, ending balance	[18],[29],[47],[61]							1.4
Investment, Identifier [Axis]: Fronton BV, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.3)
Fair Value, ending balance		1.1			1.1			$ 1.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Fronton BV, Common Stock, Equity/Other, Consumer Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[48],[62]	1.1			1.1
Investment, Identifier [Axis]: Galaxy Universal LLC
Derivative [Line Items]
Variable rate	[16],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				35.8
Fair Value, ending balance	[18],[37]							$ 35.8
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				35.5
Fair Value, ending balance	[18],[29],[37]							$ 35.5
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[57]	$ 14.9			$ 14.9
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 7.5			$ 7.5
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 2
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 86.8			$ 86.8
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 3
Derivative [Line Items]
Variable rate	[10],[22]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 22.3			$ 22.3
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				0.9
Fair Value, ending balance	[18],[37]							$ 0.9
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				7.7
Fair Value, ending balance	[17],[18]							$ 7.7
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, November 1, 2026
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				88.9
Fair Value, ending balance	[18],[37]							$ 88.9
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				16.4
Fair Value, ending balance	[18],[29],[37]							$ 16.4
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 1.5			$ 1.5
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[25],[46]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[25],[46]	$ 103.8			$ 103.8
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[23]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 11.8			$ 11.8
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[23]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.0			$ 7.0
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44]				126.0
Fair Value, ending balance	[18],[19],[20],[37],[44]							$ 126.0
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				22.0
Fair Value, ending balance	[17],[18]							$ 22.0
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 30, 2027
Derivative [Line Items]
Variable rate	[16],[17]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				11.8
Fair Value, ending balance	[17],[18]							$ 11.8
Investment, Identifier [Axis]: General Datatech LP
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45],[49]				$ 166.5
Fair Value, ending balance	[18],[19],[20],[37],[44],[45],[49]							$ 166.5
Investment, Identifier [Axis]: General Datatech LP, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25],[46]	$ 148.7			$ 148.7
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Class A Shares
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Class A Shares, Equity/Other, Technology Hardware & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	0.0			0.0
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Ordinary Shares
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Ordinary Shares, Equity/Other, Technology Hardware & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34]	0.0			0.0
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Preferred Stock, Equity/Other, Technology Hardware & Equipment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 23.6			$ 23.6
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 15.9			$ 15.9
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 165.3			$ 165.3
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 9.0			$ 9.0
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[58],[60]				0.0
Fair Value, ending balance	[18],[29],[37],[58],[60]							0.0
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[58],[60]				302.2
Fair Value, ending balance	[18],[37],[58],[60]							302.2
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[59]	0.0			0.0
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[31],[34],[59]	232.0			232.0
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[58],[60]				53.6
Fair Value, ending balance	[18],[30],[37],[58],[60]							53.6
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[58],[60]				39.2
Fair Value, ending balance	[18],[30],[37],[58],[60]							39.2
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[58],[60]				4.6
Fair Value, ending balance	[18],[30],[37],[58],[60]							4.6
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[35],[59]	27.0			27.0
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[35],[59]	19.8			19.8
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[35],[59]	2.3			2.3
Investment, Identifier [Axis]: Global Lending Services LLC, Asset Based Finance, Diversified Financials -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				15.5
Fair Value, ending balance	[18],[30],[37]							15.5
Investment, Identifier [Axis]: Global Lending Services LLC, Asset Based Finance, Diversified Financials -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				28.5
Fair Value, ending balance	[18],[30],[37]							$ 28.5
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	9.2			9.2
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	12.0			12.0
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[48]	3.7			3.7
Investment, Identifier [Axis]: Gracent LLC, NP-1 Common Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[57]	$ 0.0			0.0
Investment, Identifier [Axis]: Greystone Equity Member Corp
Derivative [Line Items]
Variable rate	[16],[30],[37]							7.25%								7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 192.6
Fair Value, ending balance	[18],[30],[37]							$ 192.6
Investment, Identifier [Axis]: Greystone Equity Member Corp, Senior Secured Loans - First Lien, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 188.9			$ 188.9
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 3.4			$ 3.4
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 1.1			$ 1.1
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37],[39]				7.1
Fair Value, ending balance	[18],[29],[36],[37],[39]							7.1
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38],[41]	10.9			10.9
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37],[39]				0.0
Fair Value, ending balance	[18],[29],[36],[37],[39]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38],[41]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22],[38]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 35.6			$ 35.6
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[23],[38]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[38]	$ 2.0			$ 2.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien 1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					33.6
Gross Additions	[3]				2.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		35.6			35.6			33.6
Investment Income	[7]				0.0
PIK Income	[7]				2.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien -1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.3	0.3
Gross Additions	[4]							0.0
Gross Reductions	[6]							(0.6)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.3
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.2	0.2
Gross Additions	[4]							0.0
Gross Reductions	[6]							(0.3)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.1
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien 2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					2.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				(2.0)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			$ 2.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -1
Derivative [Line Items]
Variable rate	[16],[36],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				33.6
Fair Value, ending balance	[18],[36],[37]							$ 33.6
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -2
Derivative [Line Items]
Variable rate	[16],[36],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				2.0
Fair Value, ending balance	[18],[36],[37]							$ 2.0
Investment, Identifier [Axis]: Harvey Industries Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				3.3
Fair Value, ending balance	[18],[37]							$ 3.3
Investment, Identifier [Axis]: Harvey Industries Inc, Common Stock, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 4.5			$ 4.5
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 6.3			$ 6.3
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 18.9			$ 18.9
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 10.9			$ 10.9
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 4
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[24],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[24],[46]	$ 131.9			$ 131.9
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -1
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				5.6
Fair Value, ending balance	[18],[37]							$ 5.6
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				11.1
Fair Value, ending balance	[17],[18]							$ 11.1
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[45],[49]				128.7
Fair Value, ending balance	[18],[19],[20],[21],[37],[45],[49]							$ 128.7
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -2
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 18.5
Fair Value, ending balance	[18],[37]							$ 18.5
Investment, Identifier [Axis]: Hibu Inc, Senior Secured Loans - First Lien, Commercial & Professional Services
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25],[46]	$ 100.9			$ 100.9
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -1
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				25.8
Fair Value, ending balance	[18],[37]							$ 25.8
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -2
Derivative [Line Items]
Variable rate	[16],[37]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				4.6
Fair Value, ending balance	[18],[37]							$ 4.6
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -3
Derivative [Line Items]
Variable rate	[16],[17]							5.25%								5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 33.3
Fair Value, ending balance	[17],[18]							$ 33.3
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.4			$ 1.4
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[22]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 7.0			$ 7.0
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 9.0			$ 9.0
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Equity Options
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Equity Options, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt -3 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel - 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[30],[36],[37]				46.6
Fair Value, ending balance	[18],[26],[29],[30],[36],[37]							46.6
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[35],[38]	0.0			0.0
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt-1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					46.6
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(46.6)
Fair Value, ending balance		0.0			0.0			46.6
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hilding Anders-1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					46.6		32.4	32.4
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								14.2
Fair Value, ending balance								46.6
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders-2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Hilding Anders-3 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		30.3	30.3
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(30.3)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV 2, , Asset Based Finance, Real Estate -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				1.6
Fair Value, ending balance	[18],[29],[30],[37],[47]							1.6
Investment, Identifier [Axis]: Home Partners JV 2, , Asset Based Finance, Real Estate -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				0.1
Fair Value, ending balance	[18],[29],[30],[37],[47]							0.1
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance - 1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.2			0.2			0.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance - 2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					1.6
Gross Additions	[3]				2.9
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.7
Fair Value, ending balance		5.2			5.2			1.6
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance, Real Estate 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[48]	5.2			5.2
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance, Real Estate 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[48]	0.2			0.2
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					3.5		0.0	0.0
Gross Additions					6.5	[3]		3.4	[4]
Gross Reductions					0.0	[5]		0.0	[6]
Net realized gain (loss) on investments:					0.1			0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.1)			0.1
Fair Value, ending balance		10.0			10.0			3.5
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.4	[7]		0.2	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					0.0	[7]		0.0	[8]
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[48]	10.0			10.0
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[47]				3.5
Fair Value, ending balance	[18],[30],[37],[47]							3.5
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30],[47]				13.6
Fair Value, ending balance	[17],[18],[30],[47]							13.6
Investment, Identifier [Axis]: Home Partners JV, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				80.6
Fair Value, ending balance	[18],[29],[30],[37],[47]							80.6
Investment, Identifier [Axis]: Home Partners JV, Common Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					80.6		21.5	21.5
Gross Additions	[4]							45.9
Gross Reductions	[6]							(22.9)
Net realized gain (loss) on investments:								7.7
Net change in unrealized appreciation (depreciation) on investments:								28.4
Fair Value, ending balance								80.6
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV, Common Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					80.6
Gross Additions	[3]				0.0
Gross Reductions	[5]				(101.0)
Net realized gain (loss) on investments:					53.4
Net change in unrealized appreciation (depreciation) on investments:					(33.0)
Fair Value, ending balance		0.0			0.0			80.6
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				4.3
Investment, Identifier [Axis]: Home Partners JV, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				9.4
Fair Value, ending balance	[18],[29],[30],[37],[47]							9.4
Investment, Identifier [Axis]: Home Partners JV, Private Equity , Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.4
Gross Additions	[3]				0.0
Gross Reductions	[5]				(11.8)
Net realized gain (loss) on investments:					6.4
Net change in unrealized appreciation (depreciation) on investments:					(4.0)
Fair Value, ending balance		0.0			0.0			9.4
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.7
Investment, Identifier [Axis]: Home Partners JV, Private Equity, Asset Based Finance -2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		0.0	0.0
Gross Additions	[4]							0.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								(0.6)
Net change in unrealized appreciation (depreciation) on investments:								0.6
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[47]				90.4
Fair Value, ending balance	[18],[30],[37],[47]							90.4
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					90.4
Gross Additions	[3]				7.9
Gross Reductions	[5]				(98.1)
Net realized gain (loss) on investments:					4.6
Net change in unrealized appreciation (depreciation) on investments:					(4.8)
Fair Value, ending balance		0.0			0.0			$ 90.4
Investment Income	[7]				0.3
PIK Income	[7]				7.5
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Hudson Technologies Co
Derivative [Line Items]
Variable rate	[16],[30],[37]							10.25%								10.25%	10.25%	10.25%	10.25%	10.25%	10.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				82.1
Fair Value, ending balance	[18],[30],[37]							$ 82.1
Investment, Identifier [Axis]: Imagine Communications Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				2.5
Fair Value, ending balance	[18],[29],[37]							$ 2.5
Investment, Identifier [Axis]: Imagine Communications Corp, Common Stock, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 2.5			$ 2.5
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[41],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[41],[46]	$ 69.4			$ 69.4
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 5.2			$ 5.2
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[22],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 16.7			$ 16.7
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 4
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 4.0			$ 4.0
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 5
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 8.0			$ 8.0
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 6
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.7			$ 4.7
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 7
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.8			$ 1.8
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -1
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				0.2
Fair Value, ending balance	[18],[37]							$ 0.2
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -2
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				4.5
Fair Value, ending balance	[17],[18]							$ 4.5
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 - 2
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				5.7
Fair Value, ending balance	[17],[18]							$ 5.7
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 -1
Derivative [Line Items]
Variable rate	[16],[37],[39],[45]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39],[45]				91.7
Fair Value, ending balance	[18],[37],[39],[45]							$ 91.7
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl
Derivative [Line Items]
Variable rate	[16],[30],[37]							7.25%								7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 103.9
Fair Value, ending balance	[18],[30],[37]							$ 103.9
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 85.6			$ 85.6
Investment, Identifier [Axis]: Industry City TI Lessor LP
Derivative [Line Items]
Variable rate	[16],[37],[39]							10.80%								10.80%	10.80%	10.80%	10.80%	10.80%	10.80%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39]				32.5
Fair Value, ending balance	[18],[37],[39]							$ 32.5
Investment, Identifier [Axis]: Industry City TI Lessor LP, Senior Secured Loans - First Lien, Consumer Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[41]	$ 27.5			$ 27.5
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[11],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22]	$ 200.7			$ 200.7
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 20.7			$ 20.7
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 26.4			$ 26.4
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -1
Derivative [Line Items]
Variable rate	[16],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				10.4
Fair Value, ending balance	[18],[37]							$ 10.4
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				10.4
Fair Value, ending balance	[17],[18]							$ 10.4
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2028
Derivative [Line Items]
Variable rate	[16],[21],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37]				227.2
Fair Value, ending balance	[18],[21],[37]							$ 227.2
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing November 15, 2028
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				19.8
Fair Value, ending balance	[17],[18]							$ 19.8
Investment, Identifier [Axis]: Integrity Marketing Group LLC
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 143.2
Fair Value, ending balance	[17],[18]							$ 143.2
Investment, Identifier [Axis]: Integrity Marketing Group LLC, Senior Secured Loans - First Lien, Insurance
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 122.4			$ 122.4
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[11],[22],[24],[41],[46]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22],[24],[41],[46]	$ 125.0			$ 125.0
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.7			$ 1.7
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 3
Derivative [Line Items]
Variable rate	[10],[22],[24]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24]	$ 23.1			$ 23.1
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 4
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 12.4			$ 12.4
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 5
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 20.9			$ 20.9
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -1
Derivative [Line Items]
Variable rate	[16],[21],[37],[39],[45],[49]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[39],[45],[49]				167.1
Fair Value, ending balance	[18],[21],[37],[39],[45],[49]							$ 167.1
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -2
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				2.8
Fair Value, ending balance	[18],[37]							$ 2.8
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -3
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				16.9
Fair Value, ending balance	[17],[18]							$ 16.9
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -4
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				11.3
Fair Value, ending balance	[17],[18]							$ 11.3
Investment, Identifier [Axis]: JW Aluminum Co
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37],[39],[42]				81.0
Fair Value, ending balance	[18],[36],[37],[39],[42]							81.0
Investment, Identifier [Axis]: JW Aluminum Co | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					81.0		0.0	0.0
Gross Additions	[4]							75.5
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								5.5
Fair Value, ending balance								81.0
Investment Income	[8]							6.2
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37],[58],[60]				0.0
Fair Value, ending balance	[18],[29],[36],[37],[58],[60]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock, Equity/Other, Materials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[38],[59]	$ 2.2			$ 2.2
Investment, Identifier [Axis]: JW Aluminum Co, Other Senior Debt, Materials
Derivative [Line Items]
Variable rate	[10],[22],[38],[41],[43]	10.30%			10.30%					10.30%	10.30%	10.30%	10.30%	10.30%	10.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38],[41],[43]	$ 78.5			$ 78.5
Investment, Identifier [Axis]: JW Aluminum Co, Other Senior Secured Debt | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		41.8	41.8
Gross Additions	[4]							0.0
Gross Reductions	[6]							(39.4)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(2.4)
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37],[58],[60]				122.6
Fair Value, ending balance	[18],[36],[37],[58],[60]							$ 122.6
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Equity/Other, Materials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[38],[59]	$ 105.4			105.4
Investment, Identifier [Axis]: Jarrow Formulas Inc
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[39],[44],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[39],[44],[45],[49]				$ 190.3
Fair Value, ending balance	[18],[19],[20],[21],[37],[39],[44],[45],[49]							$ 190.3
Investment, Identifier [Axis]: Jarrow Formulas Inc, Senior Secured Loans - First Lien, Household & Personal Products
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[24],[25],[41],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[24],[25],[41],[46]	$ 184.9			$ 184.9
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[47],[54]				16.8
Fair Value, ending balance	[18],[47],[54]							16.8
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					16.8		0.0	0.0
Gross Additions					0.0	[3]		20.9	[4]
Gross Reductions					(30.1)	[5]		0.0	[6]
Net realized gain (loss) on investments:					9.2			0.0
Net change in unrealized appreciation (depreciation) on investments:					4.1			(4.1)
Fair Value, ending balance		0.0			0.0			16.8
Investment Income					0.7	[7]		0.5	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					0.0	[7]		0.0	[8]
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				76.1
Fair Value, ending balance	[18],[37],[47]							76.1
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[47]				74.5
Fair Value, ending balance	[17],[18],[47]							74.5
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					75.6
Gross Additions	[3]				0.0
Gross Reductions	[5]				(75.9)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.3
Fair Value, ending balance		0.0			0.0			75.6
Investment Income	[7]				9.9
PIK Income	[7]				1.9
Fee income	[7]				2.7
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	97.0			97.0
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	0.7			0.7
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[47],[52]				4.5
Fair Value, ending balance	[18],[29],[47],[52]							4.5
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					4.5
Gross Additions	[3]				0.0
Gross Reductions	[5]				(13.3)
Net realized gain (loss) on investments:					13.3
Net change in unrealized appreciation (depreciation) on investments:					(4.5)
Fair Value, ending balance		0.0			0.0			4.5
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				1.5
Investment, Identifier [Axis]: Jones Apparel Holdings, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							$ 0.0
Investment, Identifier [Axis]: Jones Apparel Holdings, Inc., Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			0.0
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -1
Derivative [Line Items]
Variable rate	[16],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				23.3
Fair Value, ending balance	[18],[37]							$ 23.3
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -2
Derivative [Line Items]
Variable rate	[16],[17]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.8
Fair Value, ending balance	[17],[18]							$ 3.8
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[30],[37]				$ 25.8
Fair Value, ending balance	[18],[26],[29],[30],[37]							25.8
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest, Asset Based Finance, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[35]	14.30%			14.30%					14.30%	14.30%	14.30%	14.30%	14.30%	14.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[35]	$ 16.3			$ 16.3
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				131.5
Fair Value, ending balance	[18],[30],[37]							131.5
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest, Asset Based Finance, Insurance
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance		68.5			68.5
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Structured Mezzanine
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				167.3
Fair Value, ending balance	[18],[30],[37]							167.3
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37]				1.4
Fair Value, ending balance	[18],[30],[36],[37]							1.4
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest, Asset Based Finance, Diversified Financials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38]	3.0			3.0
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				19.1
Fair Value, ending balance	[18],[29],[30],[37]							$ 19.1
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest, Asset Based Finance, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35]	$ 19.6			$ 19.6
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 52.7			$ 52.7
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 5.2			$ 5.2
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[22]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 38.2			$ 38.2
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 4
Derivative [Line Items]
Variable rate	[10],[23]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 0.3			$ 0.3
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -1
Derivative [Line Items]
Variable rate	[16],[37],[45]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				94.2
Fair Value, ending balance	[18],[37],[45]							$ 94.2
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -2
Derivative [Line Items]
Variable rate	[16],[37]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				4.4
Fair Value, ending balance	[18],[37]							$ 4.4
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -3
Derivative [Line Items]
Variable rate	[16],[17]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 1.1
Fair Value, ending balance	[17],[18]							$ 1.1
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans - First Lien, Commercial & Professional Services
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[24],[25],[41],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[24],[25],[41],[46]	$ 353.2			$ 353.2
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[39],[44],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[39],[44],[45],[49]				342.8
Fair Value, ending balance	[18],[19],[20],[21],[37],[39],[44],[45],[49]							$ 342.8
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				31.1
Fair Value, ending balance	[17],[18]							$ 31.1
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37]				36.1
Fair Value, ending balance	[18],[30],[36],[37]							36.1
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock, Asset Based Finance, Insurance
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38]	75.9			75.9
Investment, Identifier [Axis]: Kilter Finance, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				0.5
Fair Value, ending balance	[18],[29],[30],[36],[37]							$ 0.5
Investment, Identifier [Axis]: Kilter Finance, Private Equity, Asset Based Finance, Insurance
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	$ 0.5			$ 0.5
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[11],[22],[24]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22],[24]	$ 100.8			$ 100.8
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 38.9			$ 38.9
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -1
Derivative [Line Items]
Variable rate	[16],[21],[37],[49]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[49]				114.6
Fair Value, ending balance	[18],[21],[37],[49]							$ 114.6
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 55.7
Fair Value, ending balance	[17],[18]							$ 55.7
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 1
Derivative [Line Items]
Variable rate	[10],[13],[22],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[13],[15],[22],[46]	$ 73.2			$ 73.2
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 4.8			$ 4.8
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 3
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 10.4			$ 10.4
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 4
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.7			$ 1.7
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1
Derivative [Line Items]
Variable rate	[16],[20],[37],[45]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[37],[45]				76.5
Fair Value, ending balance	[18],[20],[37],[45]							$ 76.5
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				3.4
Fair Value, ending balance	[18],[37]							$ 3.4
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				10.8
Fair Value, ending balance	[17],[18]							$ 10.8
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -4
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.4
Fair Value, ending balance	[17],[18]							$ 3.4
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				8.9
Fair Value, ending balance	[18],[30],[37]							8.9
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				12.1
Fair Value, ending balance	[18],[30],[37]							12.1
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				6.7
Fair Value, ending balance	[18],[30],[37]							6.7
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				2.1
Fair Value, ending balance	[18],[30],[37]							2.1
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				2.9
Fair Value, ending balance	[18],[30],[37]							2.9
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 9.1
Fair Value, ending balance	[18],[30],[37]							$ 9.1
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 6.3			$ 6.3
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[46]	$ 119.4			$ 119.4
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 8.3			$ 8.3
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 5.8			$ 5.8
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[45]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[45]				107.8
Fair Value, ending balance	[18],[19],[20],[21],[37],[45]							$ 107.8
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				10.4
Fair Value, ending balance	[17],[18]							$ 10.4
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				5.4
Fair Value, ending balance	[17],[18]							$ 5.4
Investment, Identifier [Axis]: Lionbridge Technologies Inc
Derivative [Line Items]
Variable rate	[16],[19],[39],[44],[49]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[39],[44],[49]				$ 70.3
Fair Value, ending balance	[18],[19],[39],[44],[49]							$ 70.3
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Senior Secured Loans - First Lien, Media & Entertainment
Derivative [Line Items]
Variable rate	[10],[12],[22],[24],[25],[41],[46]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[15],[22],[24],[25],[41],[46]	$ 125.6			$ 125.6
Investment, Identifier [Axis]: Lipari Foods LLC
Derivative [Line Items]
Variable rate	[16],[37],[39],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39],[45],[49]				$ 272.0
Fair Value, ending balance	[18],[37],[39],[45],[49]							$ 272.0
Investment, Identifier [Axis]: Lipari Foods LLC, Senior Secured Loans - First Lien, Food & Staples Retailing 1
Derivative [Line Items]
Variable rate	[10],[22],[24],[41],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[41],[46]	$ 228.5			$ 228.5
Investment, Identifier [Axis]: Lipari Foods LLC, Senior Secured Loans - First Lien, Food & Staples Retailing 2
Derivative [Line Items]
Variable rate	[10],[22],[24],[41]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[41]	$ 40.0			$ 40.0
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd
Derivative [Line Items]
Variable rate	[16],[17],[30]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				$ 19.7
Fair Value, ending balance	[17],[18],[30]							$ 19.7
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 6.2			$ 6.2
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 12.4			$ 12.4
Investment, Identifier [Axis]: Luxembourg Life Fund - Absolute Return Fund II, Structured Mezzanine, Asset Based Finance, Insurance
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 26.0			$ 26.0
Investment, Identifier [Axis]: MB Precision Holdings LLC, Class A - 2 Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[56],[61]				0.0
Fair Value, ending balance	[18],[29],[56],[61]							$ 0.0
Investment, Identifier [Axis]: MB Precision Holdings LLC, Class A - 2 Units, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[57],[62]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[25],[46]	$ 270.2			$ 270.2
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[45]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45]				231.7
Fair Value, ending balance	[18],[19],[20],[37],[44],[45]							$ 231.7
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				56.9
Fair Value, ending balance	[17],[18]							$ 56.9
Investment, Identifier [Axis]: Matchesfashion Ltd
Derivative [Line Items]
Variable rate	[16],[30],[37]							4.63%								4.63%	4.63%	4.63%	4.63%	4.63%	4.63%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 8.2
Fair Value, ending balance	[18],[30],[37]							$ 8.2
Investment, Identifier [Axis]: Matchesfashion Ltd, Senior Secured Loans - First Lien, Consumer Durables & Apparel
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[35]	4.63%			4.63%					4.63%	4.63%	4.63%	4.63%	4.63%	4.63%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[35]	$ 6.2			$ 6.2
Investment, Identifier [Axis]: Maverick Natural Resources LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[56],[61]				143.6
Fair Value, ending balance	[18],[29],[56],[61]							143.6
Investment, Identifier [Axis]: Maverick Natural Resources LLC, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[57],[62]	192.6			192.6
Investment, Identifier [Axis]: Med-Metrix, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[52]				1.6
Fair Value, ending balance	[18],[29],[52]							1.6
Investment, Identifier [Axis]: Med-Metrix, Common Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[53]	2.5			2.5
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[52]				1.5
Fair Value, ending balance	[18],[52]							$ 1.5
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[53]	$ 1.5			$ 1.5
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 56.4			$ 56.4
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 25.1			$ 25.1
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.8			$ 7.8
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				61.9
Fair Value, ending balance	[18],[37]							$ 61.9
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				31.0
Fair Value, ending balance	[17],[18]							$ 31.0
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -3
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				7.8
Fair Value, ending balance	[17],[18]							$ 7.8
Investment, Identifier [Axis]: Medallia Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 146.5
Fair Value, ending balance	[18],[37]							$ 146.5
Investment, Identifier [Axis]: Medallia Inc, Senior Secured Loans - First Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 203.1			$ 203.1
Investment, Identifier [Axis]: Miami Beach Medical Group LLC
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[45]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45]				178.6
Fair Value, ending balance	[18],[19],[20],[37],[44],[45]							$ 178.6
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				3.9
Fair Value, ending balance	[18],[29],[37]							3.9
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 1.6			$ 1.6
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[25],[46]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[25],[46]	$ 130.8			$ 130.8
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 21.7			$ 21.7
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				51.0
Fair Value, ending balance	[18],[37],[47]							51.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc , Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					51.0		35.5	35.5
Gross Additions	[4]							1.0
Gross Reductions	[6]							0.0
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								14.5
Fair Value, ending balance								51.0
Investment Income	[8]							0.0
PIK Income	[8]							1.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				(0.1)
Net realized gain (loss) on investments:					(0.5)
Net change in unrealized appreciation (depreciation) on investments:					0.6
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.1
Fair Value, ending balance	[18],[29],[37],[47]							0.1
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					(0.6)
Net change in unrealized appreciation (depreciation) on investments:					0.5
Fair Value, ending balance		0.0			0.0			0.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.4
Fair Value, ending balance	[18],[29],[37],[47]							0.4
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				11.9
Fair Value, ending balance	[18],[29],[37],[47]							11.9
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				6.2
Fair Value, ending balance	[18],[29],[37],[47]							6.2
Investment, Identifier [Axis]: Micronics Filtration Holdings LLC, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					51.0
Gross Additions	[3]				5.7
Gross Reductions	[5]				(51.7)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(5.0)
Fair Value, ending balance		0.0			0.0			$ 51.0
Investment Income	[7]				0.2
PIK Income	[7]				0.3
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Misys Ltd
Derivative [Line Items]
Variable rate	[16],[30],[37],[42]							7.25%								7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37],[42]				21.8
Fair Value, ending balance	[18],[30],[37],[42]							$ 21.8
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				78.9
Fair Value, ending balance	[18],[30],[37]							$ 78.9
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 60.2			$ 60.2
Investment, Identifier [Axis]: Misys Ltd, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 13.4			$ 13.4
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[22],[24],[43]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24],[43]	$ 12.5			$ 12.5
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 54.6			$ 54.6
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 10.8			$ 10.8
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[37],[42],[49]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[49]				17.7
Fair Value, ending balance	[18],[37],[42],[49]							$ 17.7
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2
Derivative [Line Items]
Variable rate	[16],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				45.1
Fair Value, ending balance	[18],[37]							$ 45.1
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3
Derivative [Line Items]
Variable rate	[16],[17]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 21.6
Fair Value, ending balance	[17],[18]							$ 21.6
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[11],[22],[24]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22],[24]	$ 64.0			$ 64.0
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[22],[25],[46]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[25],[46]	$ 54.7			$ 54.7
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 4.7			$ 4.7
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 59.5			$ 59.5
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 2
Derivative [Line Items]
Variable rate	[16],[21],[37],[44],[45],[49]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[44],[45],[49]				118.4
Fair Value, ending balance	[18],[21],[37],[44],[45],[49]							$ 118.4
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				4.7
Fair Value, ending balance	[18],[37]							$ 4.7
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -3
Derivative [Line Items]
Variable rate	[16],[17]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				58.9
Fair Value, ending balance	[17],[18]							$ 58.9
Investment, Identifier [Axis]: My Community Homes PropCo 2, Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	85.0			85.0
Investment, Identifier [Axis]: My Community Homes SFR PropCo 2, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				33.0
Fair Value, ending balance	[18],[29],[30],[36],[37]							$ 33.0
Investment, Identifier [Axis]: NBG Home
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				53.3
Fair Value, ending balance	[18],[37]							$ 53.3
Investment, Identifier [Axis]: NBG Home 1
Derivative [Line Items]
Variable rate	[16],[26],[29],[37]							12.75%								12.75%	12.75%	12.75%	12.75%	12.75%	12.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37]				8.5
Fair Value, ending balance	[18],[26],[29],[37]							$ 8.5
Investment, Identifier [Axis]: NBG Home, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							$ 0.0
Investment, Identifier [Axis]: NBG Home, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: NBG Home, Senior Secured Loans - First Lien, Consumer Durables & Apparel
Derivative [Line Items]
Variable rate	[10],[22],[31],[34]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34]	$ 28.0			$ 28.0
Investment, Identifier [Axis]: NBG Home, Senior Secured Loans -Second Lien, Consumer Durables & Apparel
Derivative [Line Items]
Variable rate	[10],[22],[31],[34]	12.75%			12.75%					12.75%	12.75%	12.75%	12.75%	12.75%	12.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34]	$ 0.1			$ 0.1
Investment, Identifier [Axis]: NCI Inc
Derivative [Line Items]
Variable rate	[16],[37]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 72.0
Fair Value, ending balance	[18],[37]							$ 72.0
Investment, Identifier [Axis]: NCI Inc, Senior Secured Loans - First Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 55.2			$ 55.2
Investment, Identifier [Axis]: NPD Group Inc/The, Senior Secured Loans - First Lien, Consumer Services 1
Derivative [Line Items]
Variable rate	[10],[22]	3.50%			3.50%					3.50%	3.50%	3.50%	3.50%	3.50%	3.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 19.0			$ 19.0
Investment, Identifier [Axis]: NPD Group Inc/The, Senior Secured Loans - First Lien, Consumer Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.0			$ 1.0
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 24.0			$ 24.0
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 2.0			$ 2.0
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.2			$ 7.2
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 0.9			$ 0.9
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				24.3
Fair Value, ending balance	[18],[37]							$ 24.3
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[37]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				0.9
Fair Value, ending balance	[18],[37]							$ 0.9
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -3
Derivative [Line Items]
Variable rate	[16],[17]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				2.0
Fair Value, ending balance	[17],[18]							$ 2.0
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -4
Derivative [Line Items]
Variable rate	[16],[17]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 7.3
Fair Value, ending balance	[17],[18]							$ 7.3
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[11],[13],[22],[25],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[13],[15],[22],[25],[46]	$ 50.3			$ 50.3
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 2.1			$ 2.1
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 2.5			$ 2.5
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 3
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				13.7
Fair Value, ending balance	[17],[18]							$ 13.7
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 4
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.1
Fair Value, ending balance	[17],[18]							$ 3.1
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[20],[21],[37],[44],[45]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[21],[37],[44],[45]				82.1
Fair Value, ending balance	[18],[20],[21],[37],[44],[45]							$ 82.1
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				1.6
Fair Value, ending balance	[18],[37]							$ 1.6
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 4.2
Fair Value, ending balance	[18],[30],[37]							$ 4.2
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D 1
Derivative [Line Items]
Variable rate								1830.00%								1830.00%	1830.00%	1830.00%	1830.00%	1830.00%	1830.00%
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D, Asset Based Finance, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[22],[35]	19.70%			19.70%					19.70%	19.70%	19.70%	19.70%	19.70%	19.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 3.5			$ 3.5
Investment, Identifier [Axis]: Nine West Holdings Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							$ 0.0
Investment, Identifier [Axis]: Nine West Holdings Inc, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Novotech Pty Ltd, Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[23],[35]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 5.5			$ 5.5
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[24]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[24]	$ 73.8			$ 73.8
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services - 2
Derivative [Line Items]
Variable rate	[16],[37]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				48.1
Fair Value, ending balance	[18],[37]							$ 48.1
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37],[49]							8.25%								8.25%	8.25%	8.25%	8.25%	8.25%	8.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[49]				26.5
Fair Value, ending balance	[18],[37],[49]							$ 26.5
Investment, Identifier [Axis]: Omnimax International Inc
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[45],[49]							7.25%								7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[45],[49]				$ 217.0
Fair Value, ending balance	[18],[19],[20],[21],[37],[45],[49]							$ 217.0
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[24],[46]	8.50%			8.50%					8.50%	8.50%	8.50%	8.50%	8.50%	8.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[24],[46]	$ 148.6			$ 148.6
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 21.1			$ 21.1
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[22]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 14.0			$ 14.0
Investment, Identifier [Axis]: One Call Care Management Inc | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					23.5		0.0	0.0
Gross Additions	[4]							43.5
Gross Reductions	[6]							(21.9)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								1.9
Fair Value, ending balance								23.5
Investment Income	[8]							0.4
PIK Income	[8]							1.6
Fee income	[8]							0.0
Dividend and other income	[8]							$ 0.0
Investment, Identifier [Axis]: One Call Care Management Inc 1
Derivative [Line Items]
Variable rate	[16],[36],[37],[42]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37],[42]				5.0
Fair Value, ending balance	[18],[36],[37],[42]							$ 5.0
Investment, Identifier [Axis]: One Call Care Management Inc 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				23.5
Fair Value, ending balance	[18],[36],[37]							23.5
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				2.4
Fair Value, ending balance	[18],[29],[36],[37]							2.4
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38]	2.1			2.1
Investment, Identifier [Axis]: One Call Care Management Inc, Other Senior Debt, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	21.2			21.2
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				26.1
Fair Value, ending balance	[18],[29],[36],[37]							26.1
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38]	$ 22.5			$ 22.5
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B
Derivative [Line Items]
Variable rate		9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				$ 9.2
Fair Value, ending balance	[18],[36],[37]							9.2
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 7.7			$ 7.7
Investment, Identifier [Axis]: One Call Care Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[22],[38],[43]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38],[43]	$ 3.7			$ 3.7
Investment, Identifier [Axis]: One Call Care Management Inc, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		4.7	4.7
Gross Additions	[4]							0.6
Gross Reductions	[6]							(4.9)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								(0.4)
Fair Value, ending balance								0.0
Investment Income	[8]							0.2
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate - 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				88.9
Fair Value, ending balance	[17],[18],[30]							88.9
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate -1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 71.1
Fair Value, ending balance	[18],[30],[37]							71.1
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	10.00%			10.00%					10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 101.6			$ 101.6
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	10.00%			10.00%					10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 50.9			$ 50.9
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[30],[37],[47]							0.0
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					(3.1)
Net change in unrealized appreciation (depreciation) on investments:					3.1
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Orchard Marine Limited, Series A Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				64.6
Fair Value, ending balance	[18],[29],[30],[37],[47]							64.6
Investment, Identifier [Axis]: Orchard Marine Limited, Series A Preferred Stock, Asset Based Finance | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					64.6		24.6	24.6
Gross Additions					0.0	[3]		0.0	[4]
Gross Reductions					(65.4)	[5]		0.0	[6]
Net realized gain (loss) on investments:					3.4			0.0
Net change in unrealized appreciation (depreciation) on investments:					(2.6)			40.0
Fair Value, ending balance		$ 0.0			0.0			64.6
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.0	[7]		0.0	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					$ 0.0	[7]		$ 0.0	[8]
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[24],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[24],[25],[46]	$ 87.2			$ 87.2
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.2			$ 3.2
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 15.2			$ 15.2
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 4
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.4			$ 4.4
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 3
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				15.3
Fair Value, ending balance	[17],[18]							$ 15.3
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 4
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.7
Fair Value, ending balance	[17],[18]							$ 3.7
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[44],[45],[49]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[44],[45],[49]				88.2
Fair Value, ending balance	[18],[19],[20],[44],[45],[49]							$ 88.2
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2
Derivative [Line Items]
Variable rate	[16],[37]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 4.0
Fair Value, ending balance	[18],[37]							$ 4.0
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.7			$ 3.7
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[11],[12],[22],[25],[41],[46]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[15],[22],[25],[41],[46]	$ 242.6			$ 242.6
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 11.2			$ 11.2
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 1
Derivative [Line Items]
Variable rate	[16],[37]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				4.2
Fair Value, ending balance	[18],[37]							$ 4.2
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 2
Derivative [Line Items]
Variable rate	[16],[19],[21],[37],[39],[44],[45],[49]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[21],[37],[39],[44],[45],[49]				232.0
Fair Value, ending balance	[18],[19],[21],[37],[39],[44],[45],[49]							$ 232.0
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 3
Derivative [Line Items]
Variable rate	[16],[17]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				9.9
Fair Value, ending balance	[17],[18]							$ 9.9
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				17.4
Fair Value, ending balance	[18],[29],[36],[37]							17.4
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38]	63.4			63.4
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				0.0
Fair Value, ending balance	[18],[29],[36],[37]							$ 0.0
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK, Equity/Other, Media & Entertainment
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38]	$ 0.0			0.0
Investment, Identifier [Axis]: PSKW LLC
Derivative [Line Items]
Variable rate	[16],[20],[21],[37],[39],[44]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[21],[37],[39],[44]				$ 294.7
Fair Value, ending balance	[18],[20],[21],[37],[39],[44]							$ 294.7
Investment, Identifier [Axis]: PSKW LLC (dba ConnectiveRx), Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[11],[13],[22],[25],[41]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[13],[15],[22],[25],[41]	$ 292.5			$ 292.5
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -1
Derivative [Line Items]
Variable rate	[16],[37],[45],[49]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45],[49]				74.1
Fair Value, ending balance	[18],[37],[45],[49]							$ 74.1
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				22.1
Fair Value, ending balance	[17],[18]							$ 22.1
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -3
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 5.5
Fair Value, ending balance	[17],[18]							$ 5.5
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans - First Lien, Retailing
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 97.4			$ 97.4
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 1
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				86.6
Fair Value, ending balance	[18],[37]							$ 86.6
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 63.3
Fair Value, ending balance	[17],[18]							$ 63.3
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 64.1			$ 64.1
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 4.2			$ 4.2
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 22.5			$ 22.5
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				64.7
Fair Value, ending balance	[18],[37]							$ 64.7
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				4.2
Fair Value, ending balance	[17],[18]							$ 4.2
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				22.5
Fair Value, ending balance	[17],[18]							$ 22.5
Investment, Identifier [Axis]: Peraton Corp
Derivative [Line Items]
Variable rate	[16],[37],[42]							3.75%								3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				$ 9.0
Fair Value, ending balance	[18],[37],[42]							$ 9.0
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans -Second Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22],[41]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[41]	$ 172.0			$ 172.0
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans -Second Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	7.75%			7.75%					7.75%	7.75%	7.75%	7.75%	7.75%	7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 129.4			$ 129.4
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 1
Derivative [Line Items]
Variable rate	[16],[37],[39]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39]				178.5
Fair Value, ending balance	[18],[37],[39]							$ 178.5
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 2
Derivative [Line Items]
Variable rate	[16],[37]							7.75%								7.75%	7.75%	7.75%	7.75%	7.75%	7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				158.7
Fair Value, ending balance	[18],[37]							$ 158.7
Investment, Identifier [Axis]: Performance Health Holdings Inc
Derivative [Line Items]
Variable rate	[16],[21],[37],[49]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[49]				$ 120.2
Fair Value, ending balance	[18],[21],[37],[49]							$ 120.2
Investment, Identifier [Axis]: Performance Health Holdings Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[11],[22],[24],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[15],[22],[24],[46]	$ 107.3			$ 107.3
Investment, Identifier [Axis]: Petrochoice Holdings Inc
Derivative [Line Items]
Variable rate	[16],[37]							8.75%								8.75%	8.75%	8.75%	8.75%	8.75%	8.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				57.6
Fair Value, ending balance	[18],[37]							$ 57.6
Investment, Identifier [Axis]: Petroplex Acidizing Inc
Derivative [Line Items]
Variable rate	[16],[26],[29],[37],[47]							8.25%								8.25%	8.25%	8.25%	8.25%	8.25%	8.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				9.7
Fair Value, ending balance	[18],[26],[29],[37],[47]							$ 9.7
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.7
Gross Additions	[3]				0.0
Gross Reductions	[5]				(16.7)
Net realized gain (loss) on investments:					(5.3)
Net change in unrealized appreciation (depreciation) on investments:					12.3
Fair Value, ending balance		0.0			0.0			9.7
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					9.7		4.5	4.5
Gross Additions	[4]							0.0
Gross Reductions	[6]							(0.2)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								5.4
Fair Value, ending balance								9.7
Investment Income	[8]							0.0
PIK Income	[8]							0.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Trade Claim, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.6			0.6
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							$ 0.0
Investment, Identifier [Axis]: Polyconcept North America Inc
Derivative [Line Items]
Variable rate	[16],[37],[42]							4.50%								4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				22.7
Fair Value, ending balance	[18],[37],[42]							$ 22.7
Investment, Identifier [Axis]: Polyconcept North America Inc 2/16/24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				10.0
Fair Value, ending balance	[18],[37]							10.0
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				4.3
Fair Value, ending balance	[18],[29],[37]							$ 4.3
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units, Equity/Other, Household & Personal Products
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 9.0			9.0
Investment, Identifier [Axis]: Premium Credit Ltd 1
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 75.7
Fair Value, ending balance	[18],[30],[37]							$ 75.7
Investment, Identifier [Axis]: Premium Credit Ltd, Senior Secured Loans - First Lien, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 62.2			$ 62.2
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				6.8
Fair Value, ending balance	[18],[30],[37]							$ 6.8
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine 1
Derivative [Line Items]
Variable rate								280.00%								280.00%	280.00%	280.00%	280.00%	280.00%	280.00%
Investment, Identifier [Axis]: Pretium Partners LLC P2, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37]				16.4
Fair Value, ending balance	[18],[29],[30],[37]							$ 16.4
Investment, Identifier [Axis]: Pretium Partners LLC P2, Term Loan
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 32.9
Fair Value, ending balance	[18],[30],[37]							32.9
Investment, Identifier [Axis]: Pretium Partners LLC P2, Term Loan, Asset Based Finance, Real Estate
Derivative [Line Items]
Variable rate	[10],[22],[35]	11.00%			11.00%					11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 32.9			$ 32.9
Investment, Identifier [Axis]: Prime ST LLC, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				9.1
Fair Value, ending balance	[18],[29],[30],[36],[37]							9.1
Investment, Identifier [Axis]: Prime ST LLC, Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	$ 0.0			0.0
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[36],[37]				$ 52.4
Fair Value, ending balance	[18],[30],[36],[37]							52.4
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine, Asset Based Finance, Real Estate
Derivative [Line Items]
Variable rate	[10],[22],[35],[38]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[38]	$ 47.7			$ 47.7
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 1
Derivative [Line Items]
Variable rate	[10],[22],[38]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 64.2			$ 64.2
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 2
Derivative [Line Items]
Variable rate	[10],[22],[38]	3.00%			3.00%					3.00%	3.00%	3.00%	3.00%	3.00%	3.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 149.4			$ 149.4
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 3
Derivative [Line Items]
Variable rate	[10],[22],[38]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 0.1			$ 0.1
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 4
Derivative [Line Items]
Variable rate	[10],[22],[38]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 34.6			$ 34.6
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien -1 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					133.3
Gross Additions	[3]				15.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					1.0
Fair Value, ending balance		149.4			149.4			133.3
Investment Income	[7]				8.3
PIK Income	[7]				6.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien -2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Gross Additions	[3]				0.0
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		$ 0.1			0.1
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien 2 | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.1
Fair Value, ending balance								$ 0.1
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1
Derivative [Line Items]
Variable rate	[16],[36],[37]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				64.4
Fair Value, ending balance	[18],[36],[37]							$ 64.4
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2
Derivative [Line Items]
Variable rate	[16],[36],[37]							3.00%								3.00%	3.00%	3.00%	3.00%	3.00%	3.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				133.3
Fair Value, ending balance	[18],[36],[37]							$ 133.3
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -3
Derivative [Line Items]
Variable rate	[16],[36],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				0.1
Fair Value, ending balance	[18],[36],[37]							$ 0.1
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -4
Derivative [Line Items]
Variable rate	[16],[36],[37]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				20.2
Fair Value, ending balance	[18],[36],[37]							$ 20.2
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -5
Derivative [Line Items]
Variable rate	[16],[17],[36]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[36]				10.1
Fair Value, ending balance	[17],[18],[36]							$ 10.1
Investment, Identifier [Axis]: Propulsion Acquisition LLC
Derivative [Line Items]
Variable rate	[16],[20],[37],[39],[44],[49]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[37],[39],[44],[49]				$ 61.1
Fair Value, ending balance	[18],[20],[37],[39],[44],[49]							$ 61.1
Investment, Identifier [Axis]: Propulsion Acquisition LLC, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[13],[22],[24],[25],[41]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[13],[15],[22],[24],[25],[41]	$ 60.0			$ 60.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				0.1
Fair Value, ending balance	[18],[29],[30],[37],[47]							0.1
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[48]	0.5			0.5
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[47]				9.3
Fair Value, ending balance	[18],[29],[30],[37],[47]							$ 9.3
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[48]	$ 9.0			9.0
Investment, Identifier [Axis]: Pure Fishing Inc 1
Derivative [Line Items]
Variable rate	[16],[37],[45],[49]							8.38%								8.38%	8.38%	8.38%	8.38%	8.38%	8.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45],[49]				$ 168.1
Fair Value, ending balance	[18],[37],[45],[49]							$ 168.1
Investment, Identifier [Axis]: Pure Fishing Inc, Senior Secured Loans - First Lien, Consumer Durables & Apparel
Derivative [Line Items]
Variable rate	[10],[22],[43]	4.50%			4.50%					4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43]	$ 28.0			$ 28.0
Investment, Identifier [Axis]: Pure Fishing Inc, Senior Secured Loans -Second Lien, Consumer Durables & Apparel
Derivative [Line Items]
Variable rate	[10],[22],[46]	8.38%			8.38%					8.38%	8.38%	8.38%	8.38%	8.38%	8.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 86.7			$ 86.7
Investment, Identifier [Axis]: Qdoba Restaurant Corp
Derivative [Line Items]
Variable rate	[16],[37],[42],[45]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[45]				$ 10.8
Fair Value, ending balance	[18],[37],[42],[45]							$ 10.8
Investment, Identifier [Axis]: Qdoba Restaurant Corp, Senior Secured Loans - First Lien, Consumer Services
Derivative [Line Items]
Variable rate	[10],[22],[43],[46]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43],[46]	$ 10.8			$ 10.8
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.9
Fair Value, ending balance	[18],[29],[37]							0.9
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	0.9			0.9
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.2
Fair Value, ending balance	[18],[29],[37]							$ 0.2
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.2			0.2
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[21],[37],[39],[45],[49]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[21],[37],[39],[45],[49]				280.6
Fair Value, ending balance	[18],[19],[20],[21],[37],[39],[45],[49]							$ 280.6
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -2
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				4.1
Fair Value, ending balance	[18],[37]							$ 4.1
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -3
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				16.3
Fair Value, ending balance	[17],[18]							$ 16.3
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -4
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 3.6
Fair Value, ending balance	[17],[18]							$ 3.6
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans - First Lien, Insurance 1
Derivative [Line Items]
Variable rate	[10],[11],[12],[13],[22],[41],[46]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[12],[13],[15],[22],[41],[46]	$ 239.0			$ 239.0
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans - First Lien, Insurance 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.7			$ 7.7
Investment, Identifier [Axis]: Radwell International LLC/PA, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.0			$ 1.0
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC
Derivative [Line Items]
Variable rate	[16],[20],[21],[37],[39],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[21],[37],[39],[45],[49]				$ 124.1
Fair Value, ending balance	[18],[20],[21],[37],[39],[45],[49]							$ 124.1
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services
Derivative [Line Items]
Variable rate	[10],[11],[13],[22],[24],[41],[46]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[11],[13],[15],[22],[24],[41],[46]	$ 89.9			$ 89.9
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 1
Derivative [Line Items]
Variable rate	[16],[37],[45]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				23.3
Fair Value, ending balance	[18],[37],[45]							$ 23.3
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.2
Fair Value, ending balance	[17],[18]							$ 3.2
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 3
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				3.4
Fair Value, ending balance	[18],[37]							$ 3.4
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 4
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 7.5
Fair Value, ending balance	[17],[18]							$ 7.5
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.7			$ 1.7
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 33.6			$ 33.6
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 1.5			$ 1.5
Investment, Identifier [Axis]: Ridgeback Resources Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[37],[58],[60]				9.9
Fair Value, ending balance	[18],[29],[30],[37],[58],[60]							$ 9.9
Investment, Identifier [Axis]: Ridgeback Resources Inc, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[35],[59]	$ 8.3			8.3
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1
Derivative [Line Items]
Variable rate	[16],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				2.7
Fair Value, ending balance	[18],[37]							$ 2.7
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2
Derivative [Line Items]
Variable rate	[16],[20],[45]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[20],[45]				28.2
Fair Value, ending balance	[18],[20],[45]							$ 28.2
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3
Derivative [Line Items]
Variable rate	[16],[17]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 2.5
Fair Value, ending balance	[17],[18]							$ 2.5
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 1
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.4			$ 3.4
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 2
Derivative [Line Items]
Variable rate	[10],[13],[46]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[13],[15],[46]	$ 26.7			$ 26.7
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 3
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.5			$ 1.5
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity, Asset Based Finance, Real Estate
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 259.7			259.7
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				2.4
Fair Value, ending balance	[17],[18]							$ 2.4
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 6.0
Fair Value, ending balance	[17],[18]							$ 6.0
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 6.0			$ 6.0
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 0.6			$ 0.6
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.25%			5.25%					5.25%	5.25%	5.25%	5.25%	5.25%	5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 1.8			$ 1.8
Investment, Identifier [Axis]: SIRVA Worldwide Inc
Derivative [Line Items]
Variable rate	[16],[37],[42]							9.50%								9.50%	9.50%	9.50%	9.50%	9.50%	9.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				5.7
Fair Value, ending balance	[18],[37],[42]							$ 5.7
Investment, Identifier [Axis]: Safe-Guard Products International LLC
Derivative [Line Items]
Variable rate	[16],[44],[45],[49]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[44],[45],[49]				$ 45.1
Fair Value, ending balance	[18],[44],[45],[49]							$ 45.1
Investment, Identifier [Axis]: Safe-Guard Products International LLC, Senior Secured Loans - First Lien, Diversified Financials
Derivative [Line Items]
Variable rate	[10],[24]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[24]	$ 0.1			$ 0.1
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Asset Based Finance, Real Estate 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 5.7			$ 5.7
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Asset Based Finance, Real Estate 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	18.00%			18.00%					18.00%	18.00%	18.00%	18.00%	18.00%	18.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 2.4			$ 2.4
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Term Loan, Asset Based Finance, Real Estate
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.30%			7.30%					7.30%	7.30%	7.30%	7.30%	7.30%	7.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 34.4			$ 34.4
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -1
Derivative [Line Items]
Variable rate	[16],[37]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				1.9
Fair Value, ending balance	[18],[37]							$ 1.9
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				7.6
Fair Value, ending balance	[17],[18]							$ 7.6
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -3
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 6.3
Fair Value, ending balance	[17],[18]							$ 6.3
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 3.1			$ 3.1
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.3			$ 6.3
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.3			$ 6.3
Investment, Identifier [Axis]: Sealane Trade Finance L+375
Derivative [Line Items]
Variable rate								3.75%								3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investment, Identifier [Axis]: Sealane Trade Finance L+963
Derivative [Line Items]
Variable rate								9.63%								9.63%	9.63%	9.63%	9.63%	9.63%	9.63%
Investment, Identifier [Axis]: Sequa Corp
Derivative [Line Items]
Variable rate	[16],[37],[42],[45]							10.75%								10.75%	10.75%	10.75%	10.75%	10.75%	10.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[45]				5.9
Fair Value, ending balance	[18],[37],[42],[45]							$ 5.9
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -1
Derivative [Line Items]
Variable rate	[16],[37],[42],[45]							6.75%								6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42],[45]				16.2
Fair Value, ending balance	[18],[37],[42],[45]							$ 16.2
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -2
Derivative [Line Items]
Variable rate	[16],[37]							9.00%								9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				$ 17.2
Fair Value, ending balance	[18],[37]							$ 17.2
Investment, Identifier [Axis]: Sequa Corp, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[43],[46]	6.75%			6.75%					6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43],[46]	$ 8.3			$ 8.3
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1
Derivative [Line Items]
Variable rate	[16],[26],[29],[37]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37]				51.6
Fair Value, ending balance	[18],[26],[29],[37]							$ 51.6
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2
Derivative [Line Items]
Variable rate	[16],[26],[29],[37]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37]				8.9
Fair Value, ending balance	[18],[26],[29],[37]							$ 8.9
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -3
Derivative [Line Items]
Variable rate	[16],[37]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				36.0
Fair Value, ending balance	[18],[37]							$ 36.0
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -4
Derivative [Line Items]
Variable rate	[16],[17]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				6.0
Fair Value, ending balance	[17],[18]							$ 6.0
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Class R Common Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[57]	0.0			0.0
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34]	$ 1.6			1.6
Investment, Identifier [Axis]: SitusAMC Holdings Corp
Derivative [Line Items]
Variable rate	[16],[19],[20],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37]				$ 94.4
Fair Value, ending balance	[18],[19],[20],[37]							$ 94.4
Investment, Identifier [Axis]: SitusAMC Holdings Corp, Senior Secured Loans - First Lien, Real Estate
Derivative [Line Items]
Variable rate	[10],[12],[13],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22]	$ 53.5			$ 53.5
Investment, Identifier [Axis]: Solera LLC
Derivative [Line Items]
Variable rate	[16],[37],[42]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				$ 317.6
Fair Value, ending balance	[18],[37],[42]							$ 317.6
Investment, Identifier [Axis]: Solera LLC, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[43]	8.00%			8.00%					8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43]	$ 307.7			$ 307.7
Investment, Identifier [Axis]: Sorenson Communications LLC
Derivative [Line Items]
Variable rate	[16],[19],[37],[42],[44],[47],[49]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[37],[42],[44],[47],[49]				60.1
Fair Value, ending balance	[18],[19],[37],[42],[44],[47],[49]							$ 60.1
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47],[58],[60]				67.5
Fair Value, ending balance	[18],[29],[37],[47],[58],[60]							67.5
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock, Equity/Other, Telecommunication Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[59]	$ 2.9			$ 2.9
Investment, Identifier [Axis]: Sorenson Communications LLC, Senior Secured Loans - First Lien, Telecommunication Services
Derivative [Line Items]
Variable rate	[10],[12],[24],[25],[43]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[15],[24],[25],[43]	$ 33.3			$ 33.3
Investment, Identifier [Axis]: Sorenson Communications LLC, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[9]				60.1		0.0	0.0
Gross Additions					0.0	[3]		61.8	[9]
Gross Reductions					(56.9)	[5]		(5.1)	[9]
Net realized gain (loss) on investments:					0.0			0.2	[9]
Net change in unrealized appreciation (depreciation) on investments:					(3.2)			3.2	[9]
Fair Value, ending balance		0.0			0.0			60.1	[9]
Investment Income					0.0	[7]		2.8	[9]
PIK Income					0.0	[7]		0.0	[9]
Fee income					0.0	[7]		0.0	[9]
Dividend and other income					0.0	[7]		0.0	[9]
Investment, Identifier [Axis]: Sorenson Communications LLC, Subordinated Debt, Telecommunication Services 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[59]	9.3			9.3
Investment, Identifier [Axis]: Sorenson Communications LLC, Subordinated Debt, Telecommunication Services 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[59]	32.9			32.9
Investment, Identifier [Axis]: Sorenson Communications LLC, Trade Claim, Equity/Other, Telecommunication Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[14],[15],[22],[34],[59]	1.0			1.0
Investment, Identifier [Axis]: Sound United LLC | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0		20.9	20.9
Gross Additions	[4]							1.7
Gross Reductions	[6]							(22.6)
Net realized gain (loss) on investments:								0.0
Net change in unrealized appreciation (depreciation) on investments:								0.0
Fair Value, ending balance								0.0
Investment Income	[8]							0.0
PIK Income	[8]							1.0
Fee income	[8]							0.0
Dividend and other income	[8]							0.0
Investment, Identifier [Axis]: Sound United LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				77.5
Fair Value, ending balance	[18],[36],[37]							$ 77.5
Investment, Identifier [Axis]: Sound United LLC, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 7.0			$ 7.0
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[25]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[25]	$ 51.8			$ 51.8
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 15.0			$ 15.0
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[44]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[44]				52.2
Fair Value, ending balance	[18],[19],[20],[44]							$ 52.2
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				15.0
Fair Value, ending balance	[17],[18]							$ 15.0
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[37],[39],[44],[45]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[39],[44],[45]				61.3
Fair Value, ending balance	[18],[37],[39],[44],[45]							$ 61.3
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[17]							5.50%								5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 7.9
Fair Value, ending balance	[17],[18]							$ 7.9
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[25],[41],[46]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[25],[41],[46]	$ 69.0			$ 69.0
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 16.6			$ 16.6
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.50%			5.50%					5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.9			$ 7.9
Investment, Identifier [Axis]: Staples Canada
Derivative [Line Items]
Variable rate	[16],[30],[37]							7.00%								7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 29.1
Fair Value, ending balance	[18],[30],[37]							$ 29.1
Investment, Identifier [Axis]: Staples Canada, Senior Secured Loans - First Lien, Retailing
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.00%			7.00%					7.00%	7.00%	7.00%	7.00%	7.00%	7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 23.6			$ 23.6
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[61]				24.3
Fair Value, ending balance	[18],[30],[61]							24.3
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, Private Equity, Asset Based Finance, Diversified Financials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[35],[62]	23.9			23.9
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							$ 0.0
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock, Equity/Other, Consumer Durables & Apparel
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.0			0.0
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-1
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[49]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[49]				106.9
Fair Value, ending balance	[18],[19],[20],[37],[44],[49]							$ 106.9
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 48.2
Fair Value, ending balance	[17],[18]							$ 48.2
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25],[46]	$ 93.1			$ 93.1
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 37.5			$ 37.5
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 9.0			$ 9.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc
Derivative [Line Items]
Variable rate	[16]							4.00%								4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				8.3
Fair Value, ending balance	[18],[26],[29],[37],[47]							$ 8.3
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans, First Lien
Derivative [Line Items]
Variable rate	[16],[37],[47]							3.75%								3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[47]				6.0
Fair Value, ending balance	[18],[37],[47]							$ 6.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				0.0
Fair Value, ending balance	[18],[29],[37]							0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[41],[48],[59]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[48]	1.00%			1.00%					1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	$ 4.5			$ 4.5
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[48]	3.75%			3.75%					3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[48]	$ 0.5			$ 0.5
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23],[48]	1.00%			1.00%					1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[48]	$ 1.7			$ 1.7
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans -Second Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[48]	4.00%			4.00%					4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[48]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[9]				6.0		0.0	0.0
Gross Additions	[9]							5.7
Gross Reductions	[9]							0.0
Net realized gain (loss) on investments:	[9]							0.0
Net change in unrealized appreciation (depreciation) on investments:	[9]							0.3
Fair Value, ending balance	[9]							6.0
Investment Income	[9]							0.2
PIK Income	[9]							0.1
Fee income	[9]							0.0
Dividend and other income	[9]							0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans—First Lien - 1 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					6.0
Gross Additions	[3]				0.1
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(5.6)
Fair Value, ending balance		0.5			0.5			6.0
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans—First Lien - 2 | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				4.5
Gross Reductions	[5]				0.0
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		4.5			4.5			0.0
Investment Income	[7]				0.3
PIK Income	[7]				0.1
Fee income	[7]				0.2
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans—Second Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					8.3
Gross Additions	[3]				0.0
Gross Reductions	[5]				(0.2)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(8.1)
Fair Value, ending balance		$ 0.0			0.0			$ 8.3
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				$ 0.0
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 72.4			$ 72.4
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 5.7			$ 5.7
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1
Derivative [Line Items]
Variable rate	[16],[37],[45]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				56.3
Fair Value, ending balance	[18],[37],[45]							$ 56.3
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2
Derivative [Line Items]
Variable rate	[16],[37]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				1.8
Fair Value, ending balance	[18],[37]							$ 1.8
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				17.3
Fair Value, ending balance	[17],[18]							$ 17.3
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -4
Derivative [Line Items]
Variable rate	[16],[17]							5.75%								5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				3.9
Fair Value, ending balance	[17],[18]							$ 3.9
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Ltd, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37]				1.1
Fair Value, ending balance	[18],[29],[37]							$ 1.1
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Ltd, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.8			$ 0.8
Investment, Identifier [Axis]: TIBCO Software Inc, Other Senior Debt, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[43]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43]	$ 0.8			$ 0.8
Investment, Identifier [Axis]: TIBCO Software Inc, Preferred Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 127.3			$ 127.3
Investment, Identifier [Axis]: TIBCO Software Inc, Senior Secured Loans - First Lien, Software & Services
Derivative [Line Items]
Variable rate	[10],[22],[40],[43]	4.50%			4.50%					4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[40],[43]	$ 35.9			$ 35.9
Investment, Identifier [Axis]: Tangoe LLC
Derivative [Line Items]
Variable rate	[16],[21],[37],[39],[45],[49]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[21],[37],[39],[45],[49]				$ 147.2
Fair Value, ending balance	[18],[21],[37],[39],[45],[49]							$ 147.2
Investment, Identifier [Axis]: Tangoe LLC, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[41],[46]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[41],[46]	$ 146.3			$ 146.3
Investment, Identifier [Axis]: Tangoe LLC, Senior Secured Loans - First Lien, Software & Services 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[41],[46]	1.5			1.5
Investment, Identifier [Axis]: Tekfor HoldCo (formerly Amtek Global Technology Pte Ltd) , Senior Secured Loans—First Lien | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					34.8
Gross Additions	[3]				0.0
Gross Reductions	[5]				(16.9)
Net realized gain (loss) on investments:					(3.2)
Net change in unrealized appreciation (depreciation) on investments:					(4.4)
Fair Value, ending balance		10.3			10.3			$ 34.8
Investment Income	[7]				0.0
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: Tekfor HoldCo, Senior Secured Loans - First Lien, Automobiles & Components
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35],[38]	10.3			10.3
Investment, Identifier [Axis]: ThermaSys Corp
Derivative [Line Items]
Variable rate	[16],[26],[29],[37],[47]							11.00%								11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[26],[29],[37],[47]				3.5
Fair Value, ending balance	[18],[26],[29],[37],[47]							$ 3.5
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47],[58]				0.0
Fair Value, ending balance	[18],[29],[37],[47],[58]							0.0
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[48],[59]	0.0			0.0
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[37],[47]				0.0
Fair Value, ending balance	[18],[29],[37],[47]							0.0
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[48]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: ThermaSys Corp, Senior Secured Loans - First Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[31],[34],[48]	11.00%			11.00%					11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[31],[34],[48]	$ 5.7			$ 5.7
Investment, Identifier [Axis]: ThermaSys Corp, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					3.5		$ 3.9	3.9
Gross Additions					0.0	[3]		0.4	[4]
Gross Reductions					0.0	[5]		0.0	[6]
Net realized gain (loss) on investments:					0.0			0.0
Net change in unrealized appreciation (depreciation) on investments:					2.2			(0.8)
Fair Value, ending balance		$ 5.7			5.7			3.5
Investment Income					0.0	[7]		0.0	[8]
PIK Income					0.0	[7]		0.5	[8]
Fee income					0.0	[7]		0.0	[8]
Dividend and other income					$ 0.0	[7]		$ 0.0	[8]
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 1
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 44.8			$ 44.8
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 2
Derivative [Line Items]
Variable rate	[10],[22],[46]	5.00%			5.00%					5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[46]	$ 44.6			$ 44.6
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -1
Derivative [Line Items]
Variable rate	[16],[37],[45]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				47.7
Fair Value, ending balance	[18],[37],[45]							$ 47.7
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -2
Derivative [Line Items]
Variable rate	[16],[37],[45]							5.00%								5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[45]				$ 47.4
Fair Value, ending balance	[18],[37],[45]							$ 47.4
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 43.0			$ 43.0
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 5.4			$ 5.4
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 3
Derivative [Line Items]
Variable rate	[10],[22]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 12.7			$ 12.7
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 4
Derivative [Line Items]
Variable rate	[10],[23]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 15.5			$ 15.5
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods - 5
Derivative [Line Items]
Variable rate	[16],[17]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				17.2
Fair Value, ending balance	[17],[18]							$ 17.2
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -1
Derivative [Line Items]
Variable rate	[16],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				44.8
Fair Value, ending balance	[18],[37]							$ 44.8
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -2
Derivative [Line Items]
Variable rate	[16],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37]				5.3
Fair Value, ending balance	[18],[37]							$ 5.3
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -3
Derivative [Line Items]
Variable rate	[16],[17]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				13.6
Fair Value, ending balance	[17],[18]							$ 13.6
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -4
Derivative [Line Items]
Variable rate	[16],[17]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				4.5
Fair Value, ending balance	[17],[18]							$ 4.5
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[30],[36],[37]				1.7
Fair Value, ending balance	[18],[29],[30],[36],[37]							1.7
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Private Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				199.3
Fair Value, ending balance	[18],[36],[37]							199.3
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				22.0
Fair Value, ending balance	[18],[36],[37]							22.0
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[36]				$ 8.0
Fair Value, ending balance	[17],[18],[36]							$ 8.0
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 30.9			$ 30.9
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.50%			6.50%					6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 125.5			$ 125.5
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -1
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				18.3
Fair Value, ending balance	[18],[30],[37]							$ 18.3
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -2
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				57.0
Fair Value, ending balance	[18],[30],[37]							$ 57.0
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -3
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.50%								6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				123.1
Fair Value, ending balance	[18],[30],[37]							$ 123.1
Investment, Identifier [Axis]: TruckPro LLC
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				$ 10.0
Fair Value, ending balance	[18],[37],[42]							$ 10.0
Investment, Identifier [Axis]: TruckPro LLC, Other Senior Debt, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[43]	11.00%			11.00%					11.00%	11.00%	11.00%	11.00%	11.00%	11.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43]	$ 9.0			$ 9.0
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity, Equity/Other, Capital Goods
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[35]	$ 7.5			$ 7.5
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	3.75%			3.75%					3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 1.7			$ 1.7
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22],[35],[43]	3.75%			3.75%					3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35],[43]	$ 1.2			$ 1.2
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Subordinated Debt, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.25%			7.25%					7.25%	7.25%	7.25%	7.25%	7.25%	7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 58.0			$ 58.0
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Subordinated Debt, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 52.9			$ 52.9
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans -Second Lien, Food, Beverage & Tobacco 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 3.5			$ 3.5
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans -Second Lien, Food, Beverage & Tobacco 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	7.50%			7.50%					7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 3.0			$ 3.0
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -1
Derivative [Line Items]
Variable rate	[16],[30],[37]							8.00%								8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				12.2
Fair Value, ending balance	[18],[30],[37]							$ 12.2
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -2
Derivative [Line Items]
Variable rate	[16],[17],[30]							7.50%								7.50%	7.50%	7.50%	7.50%	7.50%	7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				6.8
Fair Value, ending balance	[17],[18],[30]							$ 6.8
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc
Derivative [Line Items]
Variable rate	[16],[37],[42]							8.25%								8.25%	8.25%	8.25%	8.25%	8.25%	8.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[37],[42]				$ 0.7
Fair Value, ending balance	[18],[37],[42]							$ 0.7
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc, Senior Secured Loans -Second Lien, Materials
Derivative [Line Items]
Variable rate	[10],[22],[43]	8.25%			8.25%					8.25%	8.25%	8.25%	8.25%	8.25%	8.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[43]	$ 0.7			$ 0.7
Investment, Identifier [Axis]: Versatile Processing Group Inc, Class A - 2 Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[58]				0.0
Fair Value, ending balance	[18],[29],[58]							$ 0.0
Investment, Identifier [Axis]: Versatile Processing Group Inc, Class A - 2 Units, Equity/Other, Materials
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[34],[59]	$ 0.0			$ 0.0
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 2.4			$ 2.4
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 2
Derivative [Line Items]
Variable rate	[10],[22],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 4.4			$ 4.4
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 3
Derivative [Line Items]
Variable rate	[10],[23],[35]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 2.3			$ 2.3
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 1
Derivative [Line Items]
Variable rate	[10],[22]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 74.5			$ 74.5
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 2
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 17.8			$ 17.8
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 3
Derivative [Line Items]
Variable rate	[10],[23]	5.75%			5.75%					5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 6.7			$ 6.7
Investment, Identifier [Axis]: Warren Resources Inc 1
Derivative [Line Items]
Variable rate	[16],[36],[37]							9.00%								9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[36],[37]				18.7
Fair Value, ending balance	[18],[36],[37]							$ 18.7
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				20.4
Fair Value, ending balance	[18],[29],[36],[37]							20.4
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock, Equity/Other, Energy
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[38]	$ 24.8			$ 24.8
Investment, Identifier [Axis]: Warren Resources Inc, Senior Secured Loans - First Lien, Energy
Derivative [Line Items]
Variable rate	[10],[22],[38]	9.00%			9.00%					9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[38]	$ 18.6			$ 18.6
Investment, Identifier [Axis]: Warren Resources Inc, Senior Secured Loans—First Lien | Controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					18.7
Gross Additions	[3]				0.4
Gross Reductions	[5]				(0.2)
Net realized gain (loss) on investments:					0.0
Net change in unrealized appreciation (depreciation) on investments:					(0.3)
Fair Value, ending balance		$ 18.6			18.6			$ 18.7
Investment Income	[7]				1.8
PIK Income	[7]				0.1
Fee income	[7]				0.0
Dividend and other income	[7]				$ 0.0
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 1
Derivative [Line Items]
Variable rate	[10],[22],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 28.5			$ 28.5
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 2
Derivative [Line Items]
Variable rate	[10],[23],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 5.7			$ 5.7
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 3
Derivative [Line Items]
Variable rate	[10],[23],[35]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23],[35]	$ 2.1			$ 2.1
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials - 1
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				15.1
Fair Value, ending balance	[18],[30],[37]							$ 15.1
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -2
Derivative [Line Items]
Variable rate	[16],[30],[37]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				0.7
Fair Value, ending balance	[18],[30],[37]							$ 0.7
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -3
Derivative [Line Items]
Variable rate	[16],[17],[30]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				13.2
Fair Value, ending balance	[17],[18],[30]							$ 13.2
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -4
Derivative [Line Items]
Variable rate	[16],[17],[30]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18],[30]				1.0
Fair Value, ending balance	[17],[18],[30]							$ 1.0
Investment, Identifier [Axis]: Wittur Holding GmbH
Derivative [Line Items]
Variable rate	[16],[30],[37]							8.50%								8.50%	8.50%	8.50%	8.50%	8.50%	8.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[30],[37]				$ 120.9
Fair Value, ending balance	[18],[30],[37]							$ 120.9
Investment, Identifier [Axis]: Wittur Holding GmbH, Senior Secured Loans -Second Lien, Capital Goods
Derivative [Line Items]
Variable rate	[10],[22],[35]	8.50%			8.50%					8.50%	8.50%	8.50%	8.50%	8.50%	8.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[35]	$ 82.7			$ 82.7
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -1
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[45],[49]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45],[49]				141.2
Fair Value, ending balance	[18],[19],[20],[37],[44],[45],[49]							$ 141.2
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -2
Derivative [Line Items]
Variable rate	[16],[17]							6.00%								6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[17],[18]				$ 25.9
Fair Value, ending balance	[17],[18]							$ 25.9
Investment, Identifier [Axis]: Woolpert Inc, Senior Secured Loans - First Lien, Capital Goods 1
Derivative [Line Items]
Variable rate	[10],[12],[13],[22],[24],[25],[46]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[12],[13],[15],[22],[24],[25],[46]	$ 154.2			$ 154.2
Investment, Identifier [Axis]: Woolpert Inc, Senior Secured Loans - First Lien, Capital Goods 2
Derivative [Line Items]
Variable rate	[10],[23]	6.00%			6.00%					6.00%	6.00%	6.00%	6.00%	6.00%	6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 3.5			$ 3.5
Investment, Identifier [Axis]: Worldwise Inc, Class A Private Equity, Equity/Other, Household & Personal Products
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	1.6			1.6
Investment, Identifier [Axis]: Worldwise Inc, Class B Private Equity, Equity/Other, Household & Personal Products
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34]	$ 0.9			$ 0.9
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 1
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 25.2			$ 25.2
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 2
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 19.0			$ 19.0
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 3
Derivative [Line Items]
Variable rate	[10],[22]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22]	$ 6.5			$ 6.5
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 4
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 14.7			$ 14.7
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 5
Derivative [Line Items]
Variable rate	[10],[23]	6.25%			6.25%					6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[23]	$ 7.0			$ 7.0
Investment, Identifier [Axis]: Zeta Interactive Holdings Corp, Common Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[29],[36],[37]				30.4
Fair Value, ending balance	[18],[29],[36],[37]							30.4
Investment, Identifier [Axis]: Zeta Interactive Holdings Corp, Common Stock, Equity/Other, Software & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[34],[43]	14.6			14.6
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Equity/Other | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				311.3
Gross Reductions	[5]				(47.5)
Net realized gain (loss) on investments:					(1.6)
Net change in unrealized appreciation (depreciation) on investments:					(33.2)
Fair Value, ending balance		229.0			229.0			0.0
Investment Income	[7]				1.4
PIK Income	[7]				20.2
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, ending balance	[15],[22],[48]	229.0			229.0
Investment, Identifier [Axis]: athenahealth Inc, Senior Secured Loans—First Lien | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				6.8
Gross Reductions	[5]				(6.1)
Net realized gain (loss) on investments:					(0.7)
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		0.0			0.0			0.0
Investment Income	[7]				0.2
PIK Income	[7]				0.0
Fee income	[7]				0.2
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: athenahealth Inc, Subordinated Debt | Non-controlled/affiliated investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance					0.0
Gross Additions	[3]				5.5
Gross Reductions	[5]				(4.7)
Net realized gain (loss) on investments:					(0.8)
Net change in unrealized appreciation (depreciation) on investments:					0.0
Fair Value, ending balance		$ 0.0			0.0			$ 0.0
Investment Income	[7]				0.1
PIK Income	[7]				0.0
Fee income	[7]				0.0
Dividend and other income	[7]				0.0
Investment, Identifier [Axis]: hibu Inc
Derivative [Line Items]
Variable rate	[16],[19],[20],[37],[44],[45],[49]							6.25%								6.25%	6.25%	6.25%	6.25%	6.25%	6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance	[18],[19],[20],[37],[44],[45],[49]				$ 104.6
Fair Value, ending balance	[18],[19],[20],[37],[44],[45],[49]							$ 104.6

[1] For the nine months ended September 30, 2021, amount excludes $11 of unrealized depreciation on unfunded commitments acquired from the 2021 Merger.

[2] Security may be an obligation of one or more entities affiliated with the named company

[3] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.

[4] Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.

[5] Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.

[6] Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.

[7] Interest, PIK, fee and dividend income presented for the full nine months ended September 30, 2022.

[8] Interest, PIK, fee and dividend income presented for the full year ended December 31, 2021.

[9] The Company held this investment as of September 30, 2022 but it was not deemed to be an “affiliated person” of the portfolio company as of September 30, 2022. Transfers in or out have been presented at amortized cost.

[10] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of September 30, 2022, the three-month London Interbank Offered Rate, or LIBOR or “L”, was 3.75%, the Euro Interbank Offered Rate, or EURIBOR, was 1.17%, Canadian Dollar Offer Rate, or CDOR was 4.20%, the Australian Bank Bill Swap Bid Rate, or BBSY, or “B”, was 3.11%, the Reykjavik Interbank Offered Rate, or REIBOR or "R", was 6.30%, the Stockholm Interbank Offered Rate, or STIBOR or "SR", was 1.73%, the Sterling Interbank Offered Rate, or SONIA or "SA", was 2.19%, the Secured Overnight Financing Rate, or SOFR, was 3.59% and the U.S. Prime Lending Rate, or Prime, was 6.25%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases.

[11] Security or portion thereof held within CCT Tokyo Funding LLC and pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).

[12] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).

[13] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9)

[14] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the senior secured revolving credit facility (see Note 9).

[15] See Note 8 for additional information regarding the fair value of the Company's financial instruments

[16] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of December 31, 2021, the three-month London Interbank Offered Rate, or LIBOR or “L”, was 0.21%, the Euro Interbank Offered Rate, or EURIBOR, was (0.57)%, Canadian Dollar Offer Rate, or CDOR was 0.52%, the Bank Bill Swap Bid Rate, or BBSY was 0.12%, the Reykjavik Interbank Offered Rate, or REIBOR, was 2.65%, the Stockholm Interbank Offered Rate, or STIBOR, was (0.05)%, the Sterling Overnight Index Average, or SONIA, was .19%, the Secured Overnight Financing Rate, or SOFR, was .05%, and the U.S. Prime Lending Rate, or Prime, was 3.25%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment.

[17] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding.

[18] Fair value determined by the Company’s board of directors (see Note 8).

[19] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).

[20] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).

[21] Security or portion thereof was held within CCT Tokyo Funding LLC and was pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).

[22] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).

[23] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding

[24] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).

[25] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).

[26] Asset is on non-accrual status.

[27] Security held within IC Arches Investments LLC, a wholly-owned subsidiary of the Company.

[28] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.

[29] Security is non-income producing.

[30] The investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of December 31, 2021, 75.1% of the Company’s total assets represented qualifying assets.

[31] Asset is on non-accrual status.

[32] Security held within IC Arches Investments, LLC, a wholly-owned subsidiary of the Company.

[33] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.

[34] Security is non-income producing.

[35] The investment, or portion of the investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of September 30, 2022, 76.5% of the Company’s total assets represented qualifying assets.

[36] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2021, the Company held investments in one portfolio company of which it is deemed to be an “affiliated person” and deemed to “control”. During the year ended December 31, 2021, the Company disposed of investments in one portfolio of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control for the year ended December 31, 2021: Portfolio CompanyFair Value at December 31, 2020 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021 Interest Income(3) PIK Income(3) Fee Income(3) Dividend Income(3) Senior Secured Loans—First Lien Advanced Lighting Technologies Inc $12.0 $4.1 $(15.9)$(4.6)$4.4 $— $— $— $— $—  Amtek Global Technology Pte Ltd 59.7 2.4 — — (27.3)34.8 1.1 1.4 — —  ATX Networks Corp — 46.8 — — — 46.8 1.3 — — —   HM Dunn Co Inc(4) — 49.2 (7.1)(8.5)— 33.6 0.5 — — —   HM Dunn Co Inc(4) — 14.0 (19.0)7.0 — 2.0 0.4 0.8 — —  One Call Care Management Inc — 9.7 (5.1)0.1 0.3 5.0 0.3 — 0.1 —  Production Resource Group LLC — 124.9 — — 8.4 133.3 5.4 3.8 — —  Production Resource Group LLC — 0.1 — — — 0.1 — — — —  Production Resource Group LLC — 60.6 (0.4)— 4.2 64.4 2.8 0.8 0.4 —  Production Resource Group LLC — 20.2 (0.1)— 0.1 20.2 0.4 — 0.1 —  Sound United LLC 14.9 — (15.0)— 0.1 — 0.4 — — —   Warren Resources Inc(4) — 19.3 (2.0)0.1 1.3 18.7 1.3 0.1 — — Senior Secured Loans—Second LienAmtek Global Technology Pte Ltd0.1 (1.8)— (10.4)12.1 — (1.9)— — — Sound United LLC20.9 1.7 (22.6)— — — — 1.0 — — Other Senior Secured DebtAdvanced Lighting Technologies Inc— — (0.7)(22.9)23.6 — — — — —  JW Aluminum Co(4) — 75.5 — — 5.5 81.0 6.2 — — —  One Call Care Management Inc(4) — 43.5 (21.9)— 1.9 23.5 0.4 1.6 — — Subordinated DebtATX Networks Corp— 4.8 — — 2.3 7.1 — — — — Hilding Anders32.4 — — — 14.2 46.6 — — — — Hilding Anders— — — — — — — — — — Hilding Anders30.3 — — — (30.3)— — — — — Asset Based Finance 801 5th Ave, Seattle, Structure Mezzanine 29.4 25.7 — — 2.1 57.2 3.6 1.3 — —  801 5th Ave, Seattle, Private Equity 10.3 9.6 — — 3.2 23.1 — — — —  Avida Holding AB, Common Stock 38.3 9.1 — — 4.9 52.3 — — — —  Kilter Finance, Preferred Stock 0.2 34.4 — — 1.5 36.1 1.3 1.2 — —  Kilter Finance, Private Equity 0.2 0.3 — — — 0.5 — — — —  KKR Rocket Loans Aggregator LLC, Partnership Interest — 1.4 — — — 1.4 — — — 0.1  My Community Homes SFR PropCo 2, Private Equity — 33.0 — — — 33.0 — — — —  Prime St LLC, Private Equity 3.9 4.6 — — 0.6 9.1 — — — —  Prime St LLC, Structured Mezzanine 22.8 27.6 — — 2.0 52.4 0.9 2.2 — —  Portfolio CompanyFair Value at December 31, 2020 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021 Interest Income(3) PIK Income(3) Fee Income(3) Dividend Income(3)  Toorak Capital Funding LLC, Membership Interest $6.6 $1.3 $(4.9)$— $(1.3)$1.7 $— $— $— $—  Toorak Capital LLC, Membership Interest 235.9 2.3 (50.2)10.2 1.1 199.3 — — — 18.7  Toorak Capital Partners LLC, Structured Mezzanine— 73.0 (51.0)— — 22.0 0.2 — — — Credit Opportunities Partners JV, LLCCredit Opportunities Partners JV, LLC712.5 586.4 — — 97.3 1,396.2 — — — 126.9 Equity/Other Advanced Lighting Technologies Inc, Common Stock — — — (16.5)16.5 — — — — —  Advanced Lighting Technologies Inc, Warrant — — — (0.1)0.1 — — — — —  Amtek Global Technology Pte Ltd, Common Stock — — — — — — — — — —  Amtek Global Technology Pte Ltd, Ordinary Shares — — — — — — — — — —  Amtek Global Technology Pte Ltd, Trade Claim — — (1.4)0.4 1.0 — — — — —  Amtek Global Technology Pte Ltd, Private Equity — — — — — — — — — —  ATX Networks Corp, Common Stock — — — — — — — — — —  Hilding Anders, Class A Common Stock — — — — — — — — — —  Hilding Anders, Class B Common Stock — — — — — — — — — —  Hilding Anders, Class C Common Stock — — — — — — — — — —  Hilding Anders, Equity Options — — — — — — — — — —   HM Dunn Co Inc, Preferred Stock, Series A(4) — 7.1 — — — 7.1 — — — —   HM Dunn Co Inc, Preferred Stock, Series B(4) — — — — — — — — — —   JW Aluminum Co, Common Stock(4) — — — — — — — — — —   JW Aluminum Co, Preferred Stock(4) — 177.9 — — (55.3)122.6 0.4 20.9 — —   One Call Care Management Inc, Common Stock(4) — 4.5 (2.2)(0.2)0.3 2.4 — — — —   One Call Care Management Inc, Preferred Stock A(4) — 48.6 (23.7)(2.1)3.3 26.1 — — — —   One Call Care Management Inc, Preferred Stock B(4) — 15.7 (8.8)1.1 1.2 9.2 — 0.8 — —  Production Resource Group LLC, Preferred Stock, Series A PIK — 18.1 — — (0.7)17.4 — — — —  Production Resource Group LLC, Preferred Stock, Series B PIK — — — — — — — — — —  Sound United LLC, Class A Units — — — (1.1)1.1 — — — — —  Sound United LLC, Common Stock 29.3 — — — 48.2 77.5 — — — 20.0  Sound United LLC, Series I Units — — — (0.5)0.5 — — — — —  Sound United LLC, Series II Units — — — (0.5)0.5 — — — — —  Warren Resources Inc, Common Stock — 12.8 — — 7.6 20.4 — — — — Total$1,259.7 $1,568.4 $(252.0)$(48.5)$156.5 $2,684.1 $25.0 $35.9 $0.6 $165.7  ______________ (1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category. (2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category. (3)Interest, PIK, fee and dividend income presented for the full year ended December 31, 2021. (4)The Company held this investment as of December 31, 2020 but it was not deemed to be an “control” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost.

[37] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).

[38] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of September 30, 2022, the Company held investments in portfolio companies of which it is deemed to be an "affiliated person" and deemed to "control". During the nine months ended September 30, 2022, the Company disposed of investments in portfolio companies of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of September 30, 2022: Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3) Senior Secured Loans—First LienTekfor HoldCo (formerly Amtek Global Technology Pte Ltd)$34.8 $— $(16.9)$(3.2)$(4.4)$10.3 $— $— $— $—  ATX Networks Corp 46.8 0.4 (6.1)— — 41.1 2.0 1.0 — —  HM Dunn Co Inc33.6 2.0 — — — 35.6 — 2.0 — —  HM Dunn Co Inc2.0 — (2.0)— — — — — — —  One Call Care Management Inc 5.0 — — — (1.3)3.7 0.3 — — —  Production Resource Group LLC 133.3 15.1 — — 1.0 149.4 8.3 6.0 — —  Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3)  Production Resource Group LLC $0.1 $— $— $— $— $0.1 $— $— $— $—  Production Resource Group LLC 64.4 2.8 (0.4)— 0.9 67.7 4.7 1.5 — — Production Resource Group LLC20.2 10.8 (0.2)— 0.3 31.1 — — — — Warren Resources Inc18.7 0.4 (0.2)— (0.3)18.6 1.8 0.1 — — Senior Secured Loans—Second LienAmtek Global Technology Pte Ltd— — — (39.1)39.1 — — — — — Other Senior Secured Debt JW Aluminum Co 81.0 0.1 — — (2.6)78.5 6.0 — — —  One Call Care Management Inc 23.5 1.2 — — (3.5)21.2 0.2 1.5 — — Subordinated DebtATX Networks Corp7.1 3.3 — — 6.2 16.6 2.2 — — — Hilding Anders46.6 — — — (46.6)— — — — — Hilding Anders— — — — — — — — — — Hilding Anders— — — — — — — — — — Asset Based Finance 801 5th Ave, Seattle, Structure Mezzanine 57.2 0.2 — — (0.2)57.2 3.5 1.3 — —  801 5th Ave, Seattle, Private Equity 23.1 — — — (8.8)14.3 — — — —  Avenue One PropCo, Private Equity — 41.3 — — — 41.3 — — — —  Avida Holding AB, Common Stock 52.3 — — — (14.6)37.7 — — — —  Kilter Finance, Preferred Stock 36.1 39.8 — — — 75.9 4.8 1.9 — —  Kilter Finance, Private Equity 0.5 — — — — 0.5 — — — —  KKR Rocket Loans Aggregator LLC, Partnership Interest 1.4 1.6 — — — 3.0 — — — 0.8  My Community Homes PropCo 2, Private Equity 33.0 157.0 (105.0)— — 85.0 — — — —  Prime St LLC, Private Equity 9.1 — — — (9.1)— — — — —  Prime St LLC, Structured Mezzanine 52.4 0.1 — — (4.8)47.7 2.6 2.4 — —  Toorak Capital Funding LLC, Membership Interest 1.7 — (1.7)(0.2)0.2 — — — — 0.3  Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity 199.3 78.4 — — (18.0)259.7 — — — 13.7  Roemanu LLC (FKA Toorak Capital Partners LLC), Structured Mezzanine 22.0 32.0 (54.0)— — — — 0.6 — — Credit Opportunities Partners JV, LLCCredit Opportunities Partners JV, LLC1,396.2 175.0 — — (105.1)1,466.1 — — — 153.4 Equity/Other Amtek Global Technology Pte Ltd, Common Stock — — — — — — — — — —  Amtek Global Technology Pte Ltd, Ordinary Shares — — — — — — — — — —  Amtek Global Technology Pte Ltd, Private Equity — — — — — — — — — —  ATX Networks Corp, Common Stock — — — — — — — — — —  Hilding Anders, Class A Common Stock — — — — — — — — — —  Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3)  Hilding Anders, Class B Common Stock $— $— $— $— $— $— $— $— $— $—  Hilding Anders, Class C Common Stock — — — — — — — — — —  Hilding Anders, Equity Options — — — — — — — — — —  HM Dunn Co Inc, Preferred Stock, Series A 7.1 — — — 3.8 10.9 — — — —  HM Dunn Co Inc, Preferred Stock, Series B — — — — — — — — — —  JW Aluminum Co, Common Stock — — — — 2.2 2.2 — — — —  JW Aluminum Co, Preferred Stock 122.6 17.7 — — (34.9)105.4 0.6 15.2 — —  One Call Care Management Inc, Common Stock 2.4 — — — (0.3)2.1 — — — —  One Call Care Management Inc, Preferred Stock A 26.1 — — — (3.6)22.5 — — — —  One Call Care Management Inc, Preferred Stock B 9.2 — — — (1.5)7.7 — 0.5 — —  PRG III LLC, Preferred Stock, Series A PIK17.4 — — — 46.0 63.4 — — — —  PRG III LLC, Preferred Stock, Series B PIK— — — — — — — — — —   Sound United LLC, Common Stock(4) 77.5 — (17.3)— (60.2)— — — — —  Warren Resources Inc, Common Stock 20.4 — — — 4.4 24.8 — — — — Total$2,684.1 $579.2 $(203.8)$(42.5)$(215.7)$2,801.3 $37.0 $34.0 $— $168.2  ______________ (1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category. (2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category. (3)Interest, PIK, fee and dividend income presented for the full nine months ended September 30, 2022. (4)The Company held this investment as of September 30, 2022 but it was not deemed to be an “control” of the portfolio company as of September 30, 2022. Transfers in or out have been presented at amortized cost.

[39] Security or portion thereof held within Juniata River LLC and is pledged as collateral supporting the amounts outstanding under a term loan credit facility with JPMorgan Chase Bank, N.A. (see Note 9).

[40] Position or portion thereof unsettled as of September 30, 2022.

[41] Security or portion thereof held within Juniata River LLC and is pledged as collateral supporting the amounts outstanding under a term loan credit facility with JPMorgan Chase Bank, N.A. (see Note 9).

[42] Security is classified as Level 1 or 2 in the Company's fair value hierarchy (see Note 8).

[43] Security is classified as Level 1 or Level 2 in the Company's fair value hierarchy (see Note 8).

[44] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).

[45] Security or portion thereof was held within FSK CLO as of December 31, 2021.

[46] Security or portion thereof held within FS KKR MM CLO 1 LLC (see Note 9).

[47] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2021, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person for the year ended December 31, 2021: Portfolio CompanyFair Value at December 31, 2020 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021 Interest Income(3) PIK Income(3) Fee Income(3) Dividend Income(3) Senior Secured Loans—First Lien Affordable Care Inc $— $— $— $— $— $— $— $— $0.3 $—  Affordable Care Inc — 115.5 (55.9)0.3 — 59.9 2.7 — 1.6 —  Belk Inc — 42.6 (2.4)— 9.0 49.2 3.1 0.9 — —  Belk Inc — 21.7 — — 0.2 21.9 1.6 — — —  Borden (New Dairy Opco) 7.6 10.6 (10.0)0.2 0.6 9.0 0.5 — — —  Borden (New Dairy Opco) 16.8 23.4 — — 1.8 42.0 2.7 — — —  Borden Dairy Co— — — 1.3 (1.3)— — — — —  Portfolio CompanyFair Value at December 31, 2020 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021 Interest Income(3) PIK Income(3) Fee Income(3) Dividend Income(3)  Constellis Holdings LLC $— $14.0 $— $— $1.0 $15.0 $0.9 $— $— $—  Fairway Group Holdings Corp — 1.1 (0.7)0.6 (0.3)0.7 0.8 — — —  Fairway Group Holdings Corp — — — — — — — — — —   HM Dunn Co Inc(5) 0.3 — (0.6)— 0.3 — — — — —   HM Dunn Co Inc(5) 0.2 — (0.3)— 0.1 — — — — —  Micronics Filtration Holdings Inc 35.5 1.0 — — 14.5 51.0 — 1.0 — —   One Call Care Management Inc(5) 4.7 0.6 (4.9)— (0.4)— 0.2 — — —  Petroplex Acidizing Inc 4.5 — (0.2)— 5.4 9.7 — — — —   Sorenson Communications LLC(4) — 61.8 (5.1)0.2 3.2 60.1 2.8 — — —   Sungard Availability Services Capital Inc(4) — 5.7 — — 0.3 6.0 0.2 0.1 — —  ThermaSys Corp 3.9 0.4 — — (0.8)3.5 — 0.5 — — Senior Secured Loans—Second Lien Belk Inc — 4.2 — — 2.5 6.7 — — — —  Constellis Holdings LLC — 12.5 — — (0.5)12.0 0.6 0.4 — —  Fairway Group Holdings Corp — — — — — — — — — —  Sorenson Communications LLC — 22.0 (22.2)0.2 — — 0.4 0.9 — —  Sungard Availability Services Capital Inc — 13.6 0.1 — (5.4)8.3 0.7 0.2 — — Other Senior Secured Debt JW Aluminum Co(5) 41.8 — (39.4)— (2.4)— — — — — Subordinated Debt Home Partners of America Inc — 3.5 (3.5)— — — 0.1 — — — Asset Based Finance Home Partners JV, Structured Mezzanine38.5 83.4 (36.3)— 4.8 90.4 0.6 7.3 — —  Home Partners JV, Private Equity — 5.4 — — 4.0 9.4 — — — —  Home Partners JV, Private Equity — — — (0.6)0.6 — — — — —  Home Partners JV, Common Stock 21.5 45.9 (22.9)7.7 28.4 80.6 — — — —  Home Partners JV 2, Structured Mezzanine— 3.4 — — 0.1 3.5 — 0.2 — —  Home Partners JV 2, Private Equity — 0.1 — — — 0.1 — — — —  Home Partners JV 2, Private Equity — 1.5 — — 0.1 1.6 — — — —  Jet Edge International LLC, Preferred Stock — 20.9 — — (4.1)16.8 0.5 — — —  Jet Edge International LLC, Warrant — — — — 4.5 4.5 — — — —  Jet Edge International LLC, Term Loan — 78.0 (2.1)— (0.3)75.6 2.4 0.5 — —  Orchard Marine Limited, Class B Common Stock — — — — — — — — — —  Orchard Marine Limited, Series A Preferred Stock 24.6 — — — 40.0 64.6 — — — — Equity/Other Affordable Care Inc, Common Stock — 48.1 — — 4.0 52.1 — 2.3 — —  ASG Technologies, Common Stock 42.7 — (79.4)56.0 (19.3)— — — — —  ASG Technologies, Warrants 3.5 — (10.2)3.7 3.0 — — — — —  Belk Inc, Common Stock — — — — — — — 0— —  Portfolio CompanyFair Value at December 31, 2020 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021 Interest Income(3) PIK Income(3) Fee Income(3) Dividend Income(3)  Borden (New Dairy Opco), Common Stock $3.2 $5.2 $— $— $(0.7)$7.7 $— $— $— $—  Charlotte Russe Inc, Common Stock — — — (12.5)12.5 — — — — —  Constellis Holdings LLC, Private Equity — 10.3 — — (10.1)0.2 — — — —  Fairway Group Holdings Corp, Common Stock — — — — — — — — — —  Fronton BV, Common Stock 1.2 — — — 0.2 1.4 — — — —   HM Dunn Co Inc, Preferred Stock, Series A(5) — — — — — — — — — —   HM Dunn Co Inc, Preferred Stock, Series B(5) — — — — — — — — — —  Home Partners of America Inc, Common Stock 130.5 — (214.3)130.7 (46.9)— — — — —  Home Partners of America Inc, Warrant 2.1 — (4.4)4.1 (1.8)— — — — —   JW Aluminum Co, Common Stock(5) — — — — — — — — — —   JW Aluminum Co, Preferred Stock(5) 93.7 — (107.3)— 13.6 — — 4.2 — —  Micronics Filtration Holdings Inc, Common Stock — — — — — — — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series A — — — — 0.1 0.1 — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series B — — — — 0.4 0.4 — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK — — — — 11.9 11.9 — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK — — — — 6.2 6.2 — — — —   One Call Care Management Inc, Common Stock(5) 2.4 — (3.0)— 0.6 — — — — —   One Call Care Management Inc, Preferred Stock A(5) 25.5 — (32.3)— 6.8 — — — — —   One Call Care Management Inc, Preferred Stock B(5) 10.6 — (9.8)— (0.8)— — — — —  Petroplex Acidizing Inc, Preferred Stock A — 0.4 — — (0.4)— — — — 0.4  Petroplex Acidizing Inc, Warrant — — — — — — — — — —  Proserv Acquisition LLC, Class A Common Units 9.0 — (0.1)— (8.8)0.1 — — — —  Proserv Acquisition LLC, Class A Preferred Units 9.5 — — — (0.2)9.3 — — — —   Sorenson Communications LLC, Common Stock(4) — 42.5 — — 25.0 67.5 — — — —  Sungard Availability Services Capital Inc, Common Stock(4)— 6.9 — — (6.9)— — — — —  ThermaSys Corp, Common Stock — — — — — — — — — —  ThermaSys Corp, Preferred Stock — — — — — — — — — — Total$533.8 $706.2 $(667.2)$191.9 $94.3 $859.0 $20.8 $18.5 $1.9 $0.4  ______________ (1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category. (2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category. (3)Interest, PIK, fee and dividend income presented for the full year ended December 31, 2021. (4)The Company held this investment as of December 31, 2020 but it was not deemed to be an “affiliated person” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost. (5)The Company held this investment as of December 31, 2021 but it was deemed to "control" the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.

[48] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of September 30, 2022, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of September 30, 2022: Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3) Senior Secured Loans—First LienAffordable Care Inc$— $— $— $— $— $— $— $— $— $— Affordable Care Inc59.9 10.0 (21.2)— (0.7)48.0 2.7 — 0.2 — athenahealth Inc— 6.8 (6.1)(0.7)— — 0.2 — 0.2 — Belk Inc49.2 4.5 (1.0)(0.2)(39.6)12.9 3.7 2.7 — — Belk Inc21.9 0.1 — — (2.4)19.6 1.5 — — — Borden (New Dairy Opco)9.0 — (9.0)0.6 (0.6)— 0.1 — 0.3 — Borden (New Dairy Opco)42.0 0.1 (42.0)1.7 (1.8)— 0.9 — 1.3 — Borden Dairy Co— — — (25.4)25.4 — — — — —  Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3) Constellis Holdings LLC$15.0 $0.3 $— $— $(0.3)$15.0 $1.3 $— $— $— Fairway Group Holdings Corp0.7 — — (1.0)0.3 — — — — — Fairway Group Holdings Corp— — — — — — — — — — Micronics Filtration Holdings LLC51.0 5.7 (51.7)— (5.0)— 0.2 0.3 — — Petroplex Acidizing Inc9.7 — (16.7)(5.3)12.3 — — — — —  Sorenson Communications LLC(4) 60.1 — (56.9)— (3.2)— — — — — Sungard Availability Services Capital Inc6.0 0.1 — — (5.6)0.5 — — — — Sungard Availability Services Capital Inc— 4.5 — — — 4.5 0.3 0.1 0.2 — ThermaSys Corp3.5 — — — 2.2 5.7 — — — — Senior Secured Loans—Second Lien Belk Inc 6.7 — — — (3.0)3.7 — — — —  Constellis Holdings LLC 12.0 0.2 — — 1.3 13.5 1.4 — — —  Fairway Group Holdings Corp — — — — — — — — — —  Sungard Availability Services Capital Inc 8.3 — (0.2)— (8.1)— — — — — Subordinated Debt athenahealth Inc — 5.5 (4.7)(0.8)— — 0.1 — — — Asset Based Finance Home Partners JV, Structured Mezzanine90.4 7.9 (98.1)4.6 (4.8)— 0.3 7.5 — —  Home Partners JV, Private Equity 9.4 — (11.8)6.4 (4.0)— — — — 0.7  Home Partners JV, Common Stock 80.6 — (101.0)53.4 (33.0)— — — — 4.3  Home Partners JV 2, Structured Mezzanine3.5 6.5 — 0.1 (0.1)10.0 — 0.4 — —  Home Partners JV 2, Private Equity 0.1 0.1 — — — 0.2 — — — —  Home Partners JV 2, Private Equity 1.6 2.9 — — 0.7 5.2 — — — —  Jet Edge International LLC, Preferred Stock 16.8 — (30.1)9.2 4.1 — 0.7 — — —  Jet Edge International LLC, Warrant 4.5 — (13.3)13.3 (4.5)— — — — 1.5  Jet Edge International LLC, Term Loan 75.6 — (75.9)— 0.3 — 9.9 1.9 2.7 —  Orchard Marine Limited, Class B Common Stock — — — (3.1)3.1 — — — — —  Orchard Marine Limited, Series A Preferred Stock 64.6 — (65.4)3.4 (2.6)— — — — — Equity/Other Affordable Care Inc, Preferred Stock 52.1 — — — (2.1)50.0 — 4.1 — —  athenahealth Inc, Preferred Stock — 311.3 (47.5)(1.6)(33.2)229.0 1.4 20.2 — —  Belk Inc, Common Stock — — — — — — — — — —  Borden (New Dairy Opco), Common Stock 7.7 — — — (2.8)4.9 — — — —  Constellis Holdings LLC, Private Equity 0.2 — — — 5.7 5.9 — — — —  Fairway Group Holdings Corp, Common Stock — — — — — — — — — —  Fronton BV, Common Stock 1.4 — — — (0.3)1.1 — — — —  Micronics Filtration Holdings Inc, Common Stock — — (0.1)(0.5)0.6 — — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series A 0.1 — — (0.6)0.5 — — — — —  Portfolio Company Fair Value at December 31, 2021 Gross Additions(1) Gross Reductions(2) Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation) Fair Value at September 30, 2022 Interest Income(3) PIK Income(3) Fee Income(3) Dividend and Other Income(3)  Micronics Filtration Holdings Inc, Preferred Stock, Series B $0.4 $— $(0.4)$0.2 $(0.2)$— $— $— $— $—  Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK 11.9 — (11.9)11.9 (11.9)— — — — —  Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK 6.2 — (6.2)6.2 (6.2)— — — — —  Petroplex Acidizing Inc, Preferred Stock A — — — (4.9)4.9 — — — — —  Petroplex Acidizing Inc, Warrant — — — — — — — — — —  Proserv Acquisition LLC, Class A Common Units 0.1 0.1 — — 0.3 0.5 — — — —  Proserv Acquisition LLC, Class A Preferred Units 9.3 — — — (0.3)9.0 — — — —   Sorenson Communications LLC, Common Stock(4) 67.5 — (65.4)22.9 (25.0)— — — — —  Sungard Availability Services Capital Inc, Common Stock — — — — — — — — — —  ThermaSys Corp, Common Stock — — — — — — — — — —  ThermaSys Corp, Preferred Stock — — — — — — — — — — Total$859.0 $366.6 $(736.6)$89.8 $(139.6)$439.2 $24.7 $37.2 $4.9 $6.5  ______________ (1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category. (2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category. (3)Interest, PIK, fee and dividend income presented for the full nine months ended September 30, 2022. (4)The Company held this investment as of September 30, 2022 but it was not deemed to be an “affiliated person” of the portfolio company as of September 30, 2022. Transfers in or out have been presented at amortized cost.

[49] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).

[50] Security or portion thereof was held within CCT Dublin Funding Limited

[51] Security or portion thereof held within CCT Dublin Funding Limited.

[52] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company.

[53] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company

[54] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.

[55] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.

[56] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.

[57] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.

[58] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).

[59] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral to support the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).

[60] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the senior secured revolving credit facility (see Note 9).

[61] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.

[62] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.