CONSOLIDATED SCHEDULE OF INVESTMENTS - (Parenthetical) € in Millions, £ in Millions, $ in Millions, $ in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2022 USD ($) Rate		Dec. 31, 2021 USD ($) Rate		Dec. 31, 2020 USD ($)	Dec. 31, 2022 CAD ($) Rate		Dec. 31, 2022 EUR (€) Rate		Dec. 31, 2022 GBP (£) Rate		Dec. 31, 2022 NZD ($) Rate		Dec. 31, 2021 CAD ($) Rate		Dec. 31, 2021 EUR (€) Rate		Dec. 31, 2021 GBP (£) Rate
Derivative Instruments Table [Abstract]
Derivative Asset, Counterparty Name [Extensible Enumeration]		Royal Bank of Canada [Member]		Truist Financial Corporation [Member]			Royal Bank of Canada [Member]		Royal Bank of Canada [Member]		Royal Bank of Canada [Member]		Royal Bank of Canada [Member]		Truist Financial Corporation [Member]		Truist Financial Corporation [Member]		Truist Financial Corporation [Member]
Derivatives		$ (21.0)		$ (12.0)
Schedule of Investments [Line Items]
% of Net Assets		227.97%		225.65%			227.97%		227.97%		227.97%		227.97%		225.65%		225.65%		225.65%
% of Total Assets		97.00%		96.00%			97.00%		97.00%		97.00%		97.00%		96.00%		96.00%		96.00%
Coupon | Rate	[1]			9.50%											9.50%		9.50%		9.50%
Net unrealized gain (loss) for federal tax purposes		$ (200.0)		$ 100.0
Tax cost basis		22,000.0		19,900.0
Aggregate gross unrealized loss for federal tax purposes		1,200.0		700.0
Aggregate gross unrealized gain for federal tax purposes		1,000.0		800.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		21,779.8		20,009.5
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total unfunded commitments		57.0		20.0
Revolving and delayed draw loan commitments
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2,915.8		2,732.5
Less: funded commitments		(526.2)		(352.3)
Total unfunded commitments		2,389.6		2,380.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		(13.0)		(3.9)
Total net adjusted unfunded revolving and delayed draw commitments		2,376.6		2,376.3
Revolving and delayed draw loan commitments | Previously Reported
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total unfunded commitments				2,381.0
Total net adjusted unfunded revolving and delayed draw commitments				2,377.0
Private equity commitments
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		119.8		110.9
Less: funded commitments		(69.2)		(67.6)
Total unfunded commitments		50.6		43.3
Less: commitments substantially at discretion of the Company		50.6		43.3
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Senior Direct Lending Program
Investments Activity And Fair Value Table [Abstract]
Fair Value		4,958.0		4,127.0
Financial Support for Nonconsolidated Legal Entity [Abstract]
Less: funded commitments		(5,127.0)		(4,168.0)
Total unfunded commitments		294.0		262.0
Ares Capital Corporation | Senior Direct Lending Program
Financial Support for Nonconsolidated Legal Entity [Abstract]
Less: funded commitments		(1,274.0)		(987.0)
Total unfunded commitments		68.0		62.0
Ares Capital Corporation | Senior Direct Lending Program | Unfunded commitments
Schedule of Investments [Line Items]
Other commitment				62.0
Subordinated certificates of the SDLP
Investments Activity And Fair Value Table [Abstract]
Interest income		146.0		138.0		$ 127.0
Capital structuring service fees		22.0		22.0		23.0
Fair Value		$ 1,249.0		$ 987.0
Subordinated certificates of the SDLP | Ares Capital Corporation
Schedule of Investments [Line Items]
Ownership percentage of outstanding SDLP Certificates		87.50%		87.50%			87.50%		87.50%		87.50%		87.50%		87.50%		87.50%		87.50%
Subordinated certificates of the SDLP | Ares Capital Corporation | Minimum
Schedule of Investments [Line Items]
Ownership percentage of outstanding SDLP Certificates		25.00%		25.00%			25.00%		25.00%		25.00%		25.00%		25.00%		25.00%		25.00%
Non-qualifying assets | Investments, at fair value, and other non-qualifying assets | Customer Concentration Risk
Schedule of Investments [Line Items]
% of Total Assets, non-qualifying assets		25.00%		16.00%
Non-controlled affiliate
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		$ 29.5		$ 97.5
Redemptions (cost)		52.4		64.5
Sales (cost)		33.3		14.2
Interest income		12.5		10.3
Capital structuring service fees		0.1		0.3		1.0
Dividend income		2.0		0.0		0.0
Other income		0.3		1.0		0.0
Net realized gains (losses):		6.1		67.5		16.0
Net unrealized gains (losses):		71.0		(16.0)		(2.0)
Fair Value		364.4		373.1
Non-controlled affiliate | Previously Reported
Investments Activity And Fair Value Table [Abstract]
Dividend income				0.6
Net unrealized gains (losses):				(15.2)
Controlled affiliate
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		1,994.8		757.1
Redemptions (cost)		513.1		781.7
Sales (cost)		0.0		57.9
Interest income		194.5		192.1
Capital structuring service fees		20.0		21.0		20.0
Dividend income		228.2		100.5		75.0
Other income		6.0		4.0		4.0
Net realized gains (losses):		(37.5)		61.3		(5.0)
Net unrealized gains (losses):		1.0		62.0		$ 142.0
Fair Value		$ 4,119.7		2,580.4
Controlled affiliate | Previously Reported
Investments Activity And Fair Value Table [Abstract]
Capital structuring service fees				22.9
Other income				5.1
Net unrealized gains (losses):				$ 61.4
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Royal Bank of Canada, Company Settlement Date January 18, 2023
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 178.0
Derivative Asset, Notional Amount							$ 242
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ (1.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Royal Bank of Canada, Company Settlement Date January 27, 2023, Contract One
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 195.0
Derivative Asset, Notional Amount							$ 264
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ (1.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Royal Bank of Canada, Company Settlement Date January 27, 2023, Contract Two
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 12.0
Derivative Asset, Notional Amount							$ 17
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ 0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Truist Financial Corporation, Company Settlement Date January 19, 2022
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]				Foreign currency forward contract											Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount				$ 163.0
Derivative Asset, Notional Amount															$ 209
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset				$ (2.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Truist Financial Corporation, Company Settlement Date January 28, 2022, Contract One
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]				Foreign currency forward contract											Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount				$ 240.0
Derivative Asset, Notional Amount															$ 309
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset				$ (5.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: CAD, Truist Financial Corporation, Company Settlement Date January 28, 2022, Contract Two
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]				Foreign currency forward contract											Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount				$ 1.0
Derivative Asset, Notional Amount															$ 2
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset				$ 0.0
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR, Royal Bank of Canada, Company Settlement Date January 27, 2023
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 159.0
Derivative Asset, Notional Amount | €									€ 158
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ (10.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: EURO, Truist Financial Corporation, Company Settlement Date January 28, 2022, Contract One
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]				Foreign currency forward contract											Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount				$ 172.0
Derivative Asset, Notional Amount | €																	€ 153
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset				$ (2.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Royal Bank of Canada, Company Settlement Date January 27, 2023
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 145.0
Derivative Asset, Notional Amount | £											£ 125
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ (6.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP, Truist Financial Corporation, Company Settlement Date January 28, 2022, Contract Two
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]				Foreign currency forward contract											Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount				$ 126.0
Derivative Asset, Notional Amount | £																			£ 95
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset				$ (3.0)
Open Forward Foreign Currency Contract, Identifier [Axis]: NZD, Royal Bank of Canada, Company Settlement Date January 27, 2023
Derivative Instruments Table [Abstract]
Derivative Asset, Type [Extensible Enumeration]		Foreign currency forward contract					Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract		Foreign currency forward contract
Derivative Liability, Notional Amount		$ 34.0
Derivative Asset, Notional Amount													$ 59
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset		$ (3.0)
Investment, Identifier [Axis]: 2U, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.16%	[2]	6.50%	[1]		10.16%	[2]	10.16%	[2]	10.16%	[2]	10.16%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 14.6	[3],[4],[5]	$ 55.0	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		14.3	[3],[4],[5]	55.0	[6],[7],[8]
Investment, Identifier [Axis]: A.U.L. Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				1.2
Less: funded commitments				0.0
Total unfunded commitments				1.2
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				1.2
Investment, Identifier [Axis]: ACAS Equity Holdings Corporation
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.0		0.4
Fair Value		0.4		0.4
Investment, Identifier [Axis]: ACAS Equity Holdings Corporation, Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.4	[5]	0.4	[8]
Investment, Identifier [Axis]: ADF Capital, Inc., ADF Restaurant Group, LLC, and ARG Restaurant Holdings, Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		58.4
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		(57.2)
Net unrealized gains (losses):		0.0		58.4
Fair Value		0.0		0.0
Investment, Identifier [Axis]: ADF Capital, Inc., ADF Restaurant Group, LLC, and ARG Restaurant Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		8.3	[4],[9]	111.4	[7],[10]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[4],[9]	0.0	[7],[10]
Investment, Identifier [Axis]: ADG, LLC and RC IV GEDC Investor LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.1		13.7
Less: funded commitments		(14.1)		(11.9)
Total unfunded commitments		0.0		1.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.0		$ 1.8
Investment, Identifier [Axis]: ADG, LLC and RC IV GEDC Investor LLC, First lien senior secured revolving loan 1
Schedule of Investments [Line Items]
Coupon		9.19%	[2]	7.50%	[1]		9.19%	[2]	9.19%	[2]	9.19%	[2]	9.19%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 9.8	[3],[4]	$ 9.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.3	[3],[4]	$ 9.5	[6],[7]
Investment, Identifier [Axis]: ADG, LLC and RC IV GEDC Investor LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon		11.25%	[2]	5.75%	[1]		11.25%	[2]	11.25%	[2]	11.25%	[2]	11.25%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 4.3	[3],[4]	$ 2.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.1	[3],[4]	2.3	[6],[7]
Investment, Identifier [Axis]: ADG, LLC and RC IV GEDC Investor LLC, Membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0	[7]
Investment, Identifier [Axis]: ADG, LLC and RC IV GEDC Investor LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		130.0	[4]	115.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		104.0	[4]	103.7	[6],[7]
Investment, Identifier [Axis]: AHR Funding Holdings, Inc. and AHR Parent Holdings, LP, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	10.2
Investment, Identifier [Axis]: AHR Funding Holdings, Inc. and AHR Parent Holdings, LP, Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.1
Investment, Identifier [Axis]: AHR Funding Holdings, Inc. and AHR Parent Holdings, LP, Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 35.8
Investment, Identifier [Axis]: AI Aqua Merger Sub, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				0.1
Less: funded commitments				0.0
Total unfunded commitments				0.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 0.1
Investment, Identifier [Axis]: AI Aqua Merger Sub, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		7.97%	[2]	4.50%	[1]		7.97%	[2]	7.97%	[2]	7.97%	[2]	7.97%	[2]	4.50%	[1]	4.50%	[1]	4.50%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4],[11]	$ 0.9	[6],[7],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.9	[3],[4],[11]	0.9	[6],[7],[12]
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		28.9
Less: funded commitments		(0.4)
Total unfunded commitments		28.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		28.5
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 5.7
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.22%					10.22%		10.22%		10.22%		10.22%
Total first lien senior secured loans	[3],[4]	$ 26.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 26.8
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.61%					10.61%		10.61%		10.61%		10.61%
Total first lien senior secured loans	[3],[4]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.4
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	45.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	45.6
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	10.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	10.3
Investment, Identifier [Axis]: AI Fire Buyer, Inc. and AI Fire Parent LLC, Second lien senior secured loan 3
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	10.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	10.0
Investment, Identifier [Axis]: AIM Acquisition, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.8
Less: funded commitments		0.0
Total unfunded commitments		1.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.8
Investment, Identifier [Axis]: APG Intermediate Holdings Corporation and APG Holdings, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.1		0.1
Sales (cost)		0.0		0.0
Interest income		1.0		1.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(3.0)		(1.1)
Fair Value		21.8		25.0
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.1		0.1
Investment, Identifier [Axis]: APG Intermediate Holdings Corporation and APG Holdings, LLC, Class A membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.6	[4]	$ 11.5	[7]
Investment, Identifier [Axis]: APG Intermediate Holdings Corporation and APG Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.36%	[2]	6.75%	[1]		10.36%	[2]	10.36%	[2]	10.36%	[2]	10.36%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 13.3	[3],[4]	$ 13.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		13.2	[3],[4]	13.5	[6],[7]
Investment, Identifier [Axis]: API Commercial Inc., API Military Inc., and API Space Intermediate, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[9]	7.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[9]	3.6
Investment, Identifier [Axis]: AQ Sage Buyer, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.4
Less: funded commitments		0.0
Total unfunded commitments		6.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.4
Investment, Identifier [Axis]: AQ Sage Buyer, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.70%					10.70%		10.70%		10.70%		10.70%
Total first lien senior secured loans	[3],[4],[5]	$ 1.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	1.8
Investment, Identifier [Axis]: AQ Sunshine, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.4		1.8
Less: funded commitments		(1.4)		(0.3)
Total unfunded commitments		11.0		1.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 11.0		$ 1.5
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 8.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 8.6
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.42%					10.42%		10.42%		10.42%		10.42%
Total first lien senior secured loans	[3],[4]	$ 8.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 8.8
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	7.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 8.5	[3],[4]	$ 13.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.3	[3],[4]	$ 13.3	[6],[7]
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	7.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 5.6	[3],[4]	$ 20.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.5	[3],[4]	$ 20.2	[6],[7]
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.0
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured loan 5
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.42%					10.42%		10.42%		10.42%		10.42%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: AQ Sunshine, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	7.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 1.4	[3],[4],[13]	$ 0.3	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.4	[3],[4],[13]	0.3	[6],[7],[14]
Investment, Identifier [Axis]: ARES 2007-3R, Subordinated notes
Investments Activity And Fair Value Table [Abstract]
Fair Value	[5]	0.1
Investment, Identifier [Axis]: ASP-r-pac Acquisition CO LLC and ASP-r-pac Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.2		6.2
Less: funded commitments		0.0		(1.2)
Total unfunded commitments		6.2		5.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		6.2		5.0
Investment, Identifier [Axis]: ASP-r-pac Acquisition CO LLC and ASP-r-pac Holdings LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 19.2
Investment, Identifier [Axis]: ASP-r-pac Acquisition CO LLC and ASP-r-pac Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.38%					10.38%		10.38%		10.38%		10.38%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: ASP-r-pac Acquisition Co LLC and ASP-r-pac Holdings LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 19.6
Investment, Identifier [Axis]: ASP-r-pac Acquisition Co LLC and ASP-r-pac Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 46.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 45.8
Investment, Identifier [Axis]: ASP-r-pac Acquisition Co LLC and ASP-r-pac Holdings LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 1.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			1.2
Investment, Identifier [Axis]: ATI Restoration, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		83.7		12.5
Less: funded commitments		(5.8)		(11.4)
Total unfunded commitments		77.9		1.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 77.9		$ 1.1
Investment, Identifier [Axis]: ATI Restoration, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.36%	[2]	6.00%	[1]		9.36%	[2]	9.36%	[2]	9.36%	[2]	9.36%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 33.0	[3],[4]	$ 33.3	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 33.0	[3],[4]	$ 33.3	[6]
Investment, Identifier [Axis]: ATI Restoration, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.65%					9.65%		9.65%		9.65%		9.65%
Total first lien senior secured loans	[3],[4]	$ 8.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 8.2
Investment, Identifier [Axis]: ATI Restoration, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.50%	[2]	6.00%	[1]		11.50%	[2]	11.50%	[2]	11.50%	[2]	11.50%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 4.7	[3],[4],[13]	$ 8.1	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.7	[3],[4],[13]	$ 8.1	[6],[7],[14]
Investment, Identifier [Axis]: ATI Restoration, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6]			$ 2.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			2.5
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		2.0		50.5
Redemptions (cost)		3.0		26.4
Sales (cost)		0.0		0.0
Interest income		6.0		4.1
Capital structuring service fees		0.0		1.6
Dividend income		0.0		0.0
Other income		0.0		0.1
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		4.6		5.0
Fair Value		70.2		63.9
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.1		7.0
Less: funded commitments		(3.2)		(4.0)
Total unfunded commitments		3.9		3.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.9		3.0
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.9	[4]	$ 10.4	[7]
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		13.73%	[2]	10.00%	[1]		13.73%	[2]	13.73%	[2]	13.73%	[2]	13.73%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 52.1	[3],[4]	$ 49.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 52.1	[3],[4]	$ 49.5	[6],[7]
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			11.25%											11.25%		11.25%		11.25%
Total first lien senior secured loans	[6],[7]			$ 4.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			4.0
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC, First lien senior secured revolving loan 1
Schedule of Investments [Line Items]
Coupon	[2]	15.50%					15.50%		15.50%		15.50%		15.50%
Total first lien senior secured loans	[3],[4]	$ 2.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 2.2
Investment, Identifier [Axis]: Absolute Dental Group LLC and Absolute Dental Equity, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon	[2]	13.77%					13.77%		13.77%		13.77%		13.77%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.0
Investment, Identifier [Axis]: Abzena Holdings, Inc. and Astro Group Holdings Ltd.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		13.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		13.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.1		13.7
Investment, Identifier [Axis]: Abzena Holdings, Inc. and Astro Group Holdings Ltd., A ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 6.5
Investment, Identifier [Axis]: Abzena Holdings, Inc. and Astro Group Holdings Ltd., Class A ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 2.8
Investment, Identifier [Axis]: Abzena Holdings, Inc. and Astro Group Holdings Ltd., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		14.54%	[2]	10.50%	[1]		14.54%	[2]	14.54%	[2]	14.54%	[2]	14.54%	[2]	10.50%	[1]	10.50%	[1]	10.50%	[1]
Total first lien senior secured loans		$ 61.0	[3],[4],[5]	$ 13.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		59.8	[3],[4],[5]	$ 13.7	[6],[7]
Investment, Identifier [Axis]: Abzena Holdings, Inc. and Astro Group Holdings Ltd., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			11.50%											11.50%		11.50%		11.50%
Total first lien senior secured loans	[6],[7]			$ 30.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			30.5
Investment, Identifier [Axis]: Accommodations Plus Technologies LLC and Accommodations Plus Technologies Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.1		4.1
Less: funded commitments		(4.1)		(4.1)
Total unfunded commitments		0.0		0.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Investment, Identifier [Axis]: Accommodations Plus Technologies LLC and Accommodations Plus Technologies Holdings LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.6		$ 4.0
Investment, Identifier [Axis]: Accommodations Plus Technologies LLC and Accommodations Plus Technologies Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon		12.48%	[2]	10.00%	[1]		12.48%	[2]	12.48%	[2]	12.48%	[2]	12.48%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 4.1	[3],[4]	$ 4.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.1	[3],[4]	$ 3.9	[6],[7]
Investment, Identifier [Axis]: Acrisure, LLC and Acrisure Finance, Inc., Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	700.00%					700.00%		700.00%		700.00%		700.00%
Total first lien senior secured loans	[4],[11]	$ 0.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	0.5
Investment, Identifier [Axis]: Advarra Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.4
Less: funded commitments		0.0
Total unfunded commitments		0.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.4
Investment, Identifier [Axis]: Advarra Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.15%					10.15%		10.15%		10.15%		10.15%
Total first lien senior secured loans	[3],[4]	$ 4.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 3.9
Investment, Identifier [Axis]: Aero Operating LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.24%	[2]	8.00%	[1]		13.24%	[2]	13.24%	[2]	13.24%	[2]	13.24%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 36.2	[3],[4]	$ 36.6	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 35.1	[3],[4]	$ 36.6	[6]
Investment, Identifier [Axis]: Aero Operating LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		13.24%	[2]	8.00%	[1]		13.24%	[2]	13.24%	[2]	13.24%	[2]	13.24%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 1.1	[3],[4]	$ 1.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.1	[3],[4]	1.2	[6],[7]
Investment, Identifier [Axis]: AffiniPay Midco, LLC and AffiniPay Intermediate Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		45.6		9.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		45.6		9.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 45.6		$ 9.0
Investment, Identifier [Axis]: AffiniPay Midco, LLC and AffiniPay Intermediate Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6]			$ 64.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			64.0
Investment, Identifier [Axis]: AffiniPay Midco, LLC and AffiniPay Intermediate Holdings, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.64%					10.64%		10.64%		10.64%		10.64%
Total first lien senior secured loans	[3],[4]	$ 120.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 115.7
Investment, Identifier [Axis]: AffiniPay Midco, LLC and AffiniPay Intermediate Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.45%					10.45%		10.45%		10.45%		10.45%
Total first lien senior secured loans	[3],[4]	$ 63.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	60.8
Investment, Identifier [Axis]: AffiniPay Midco, LLC and AffiniPay Intermediate Holdings, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		56.8	[3],[4]	27.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 54.4	[3],[4]	$ 27.5	[7]
Investment, Identifier [Axis]: Aimbridge Acquisition Co., Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.62%	[2]	7.60%	[1]		11.62%	[2]	11.62%	[2]	11.62%	[2]	11.62%	[2]	7.60%	[1]	7.60%	[1]	7.60%	[1]
Total first lien senior secured loans		$ 22.5	[4]	$ 22.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 21.8	[4]	21.4	[7]
Investment, Identifier [Axis]: Alcami Corporation and ACM Holdings I, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				29.0
Less: funded commitments				0.0
Total unfunded commitments				29.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				29.0
Investment, Identifier [Axis]: Alcami Corporation and ACM Holdings I, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 19.5
Investment, Identifier [Axis]: Alcami Corporation and ACM Holdings I, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.42%	[2]	4.39%	[1]		11.42%	[2]	11.42%	[2]	11.42%	[2]	11.42%	[2]	4.39%	[1]	4.39%	[1]	4.39%	[1]
Total first lien senior secured loans		$ 9.5	[4]	$ 29.2
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.0	[4]	$ 28.0
Investment, Identifier [Axis]: Alcami Corporation and ACM Holdings I, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.14%											8.14%		8.14%		8.14%
Total first lien senior secured loans		19.5	[4]	$ 77.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		19.5	[4]	69.0	[7]
Investment, Identifier [Axis]: Alcami Corporation and ACM Note Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.6
Less: funded commitments		0.0
Total unfunded commitments		6.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.6
Investment, Identifier [Axis]: Alera Group, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				1.0
Less: funded commitments				0.0
Total unfunded commitments				1.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 1.0
Investment, Identifier [Axis]: Alera Group, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	6.25%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 60.6	[3],[4]	$ 96.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		58.8	[3],[4]	$ 95.6	[6],[7]
Investment, Identifier [Axis]: Alteon Health, LLC. First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7]			$ 2.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			2.8
Investment, Identifier [Axis]: American Residential Services L.L.C. and Aragorn Parent Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.5		4.5
Less: funded commitments		(0.9)		0.0
Total unfunded commitments		3.6		4.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.6		$ 4.5
Investment, Identifier [Axis]: American Residential Services L.L.C. and Aragorn Parent Holdings LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.14%					7.14%		7.14%		7.14%		7.14%
Total first lien senior secured loans	[3],[4]	$ 0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.6
Investment, Identifier [Axis]: American Residential Services L.L.C. and Aragorn Parent Holdings LP, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.25%					9.25%		9.25%		9.25%		9.25%
Total first lien senior secured loans	[4]	$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 0.3
Investment, Identifier [Axis]: American Residential Services L.L.C. and Aragorn Parent Holdings LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.23%	[2]	9.50%	[1]		13.23%	[2]	13.23%	[2]	13.23%	[2]	13.23%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 56.4	[3],[4]	$ 56.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		56.4	[3],[4]	56.4	[6],[7]
Investment, Identifier [Axis]: American Residential Services L.L.C. and Aragorn Parent Holdings LP, Series A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		6.5	[4]	3.7	[7]
Investment, Identifier [Axis]: American Seafoods Group LLC and American Seafoods Partners LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.3	[4]	0.2	[7]
Investment, Identifier [Axis]: American Seafoods Group LLC and American Seafoods Partners LLC, Warrant to purchase Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 18.9
Investment, Identifier [Axis]: American Seafoods Group LLC and American Seafoods Partners LLC, Warrant to purchase up to 7,422,078 Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 28.0
Investment, Identifier [Axis]: Amryt Pharmaceuticals, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.46%					10.46%		10.46%		10.46%		10.46%
Total first lien senior secured loans	[3],[4],[5]	$ 12.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 12.7
Investment, Identifier [Axis]: Amynta Agency Borrower Inc. and Amynta Warranty Borrower Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.58%	[2]	4.60%	[1]		9.58%	[2]	9.58%	[2]	9.58%	[2]	9.58%	[2]	4.60%	[1]	4.60%	[1]	4.60%	[1]
Total first lien senior secured loans		$ 14.6	[4]	$ 1.0	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.0	[4]	1.0	[7]
Investment, Identifier [Axis]: Amynta Agency Borrower Inc. and Amynta Warranty Borrower Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.88%					8.88%		8.88%		8.88%		8.88%
Total first lien senior secured loans	[4]	$ 2.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	2.2
Investment, Identifier [Axis]: Anaplan, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.4
Less: funded commitments		0.0
Total unfunded commitments		1.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.4
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.82%					10.82%		10.82%		10.82%		10.82%
Total first lien senior secured loans	[3],[4]	$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.7
Investment, Identifier [Axis]: Anaqua Parent Holdings, Inc. & Astorg VII Co-Invest Anaqua
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.4		4.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.4		4.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.4		$ 4.3
Investment, Identifier [Axis]: Anaqua Parent Holdings, Inc. & Astorg VII Co-Invest Anaqua, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans				$ 4.7
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 4.7
Investment, Identifier [Axis]: Anaqua Parent Holdings, Inc. & Astorg VII Co-Invest Anaqua, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.52%					7.52%		7.52%		7.52%		7.52%
Total first lien senior secured loans	[4]	$ 4.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 4.4
Investment, Identifier [Axis]: Anaqua Parent Holdings, Inc. & Astorg VII Co-Invest Anaqua, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.11%	[2]	7.00%	[1]		9.11%	[2]	9.11%	[2]	9.11%	[2]	9.11%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4]	$ 16.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.0	[3],[4]	16.0	[6],[7]
Investment, Identifier [Axis]: Anaqua Parent Holdings, Inc. & Astorg VII Co-Invest Anaqua, Limited partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		8.3	[4],[5]	7.6	[7],[8]
Investment, Identifier [Axis]: Apex Clean Energy TopCo, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		18.1		80.5
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		53.4		(1.4)
Fair Value		150.6		79.1
Investment, Identifier [Axis]: Apex Clean Energy TopCo, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		150.6		79.1
Investment, Identifier [Axis]: Applied Technical Services, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.8
Less: funded commitments		(1.1)
Total unfunded commitments		2.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.7
Investment, Identifier [Axis]: Applied Technical Services, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.8
Investment, Identifier [Axis]: Applied Technical Services, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.25%					12.25%		12.25%		12.25%		12.25%
Total first lien senior secured loans	[3]	$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	1.1
Investment, Identifier [Axis]: Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.1		$ 0.1
Investment, Identifier [Axis]: Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.54%	[2]	8.25%	[1]		11.54%	[2]	11.54%	[2]	11.54%	[2]	11.54%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 5.7	[3],[4]	$ 13.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.7	[3],[4]	13.4	[6],[7]
Investment, Identifier [Axis]: Appriss Health, LLC and Appriss Health Intermediate Holdings, Inc., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		35.6	[4]	34.6	[7]
Investment, Identifier [Axis]: Apptio, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.2		4.2
Less: funded commitments		(2.5)		(1.7)
Total unfunded commitments		1.7		2.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.7		$ 2.5
Investment, Identifier [Axis]: Apptio, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.94%	[2]	8.25%	[1]		9.94%	[2]	9.94%	[2]	9.94%	[2]	9.94%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 15.1	[3],[4]	$ 62.2	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.1	[3],[4]	$ 62.2	[6]
Investment, Identifier [Axis]: Apptio, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.93%	[2]	8.25%	[1]		9.93%	[2]	9.93%	[2]	9.93%	[2]	9.93%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 2.5	[3],[4]	$ 1.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.5	[3],[4]	$ 1.7	[6],[7]
Investment, Identifier [Axis]: Ardonagh Midco 2 plc and Ardonagh Midco 3 plc, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.81%	[2]	8.21%	[1]		8.81%	[2]	8.81%	[2]	8.81%	[2]	8.81%	[2]	8.21%	[1]	8.21%	[1]	8.21%	[1]
Total first lien senior secured loans		$ 90.0	[3],[4],[5]	$ 69.5	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 89.1	[3],[4],[5]	$ 69.5	[6],[7],[8]
Investment, Identifier [Axis]: Ardonagh Midco 2 plc and Ardonagh Midco 3 plc, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		8.19%	[2]	7.50%	[1]		8.19%	[2]	8.19%	[2]	8.19%	[2]	8.19%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 66.8	[3],[4],[5]	$ 14.5	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 66.8	[3],[4],[5]	$ 14.5	[6],[7],[8]
Investment, Identifier [Axis]: Ardonagh Midco 2 plc and Ardonagh Midco 3 plc, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		8.19%	[2]	7.75%	[1]		8.19%	[2]	8.19%	[2]	8.19%	[2]	8.19%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 75.0	[3],[4],[5]	$ 7.5	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 75.0	[3],[4],[5]	$ 7.5	[6],[7],[8]
Investment, Identifier [Axis]: Ardonagh Midco 2 plc and Ardonagh Midco 3 plc, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		8.00%	[2]	6.75%	[1]		8.00%	[2]	8.00%	[2]	8.00%	[2]	8.00%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 7.0	[3],[4],[5]	$ 111.2	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		7.0	[3],[4],[5]	111.2	[6],[7],[8]
Investment, Identifier [Axis]: Ardonagh Midco 2 plc and Ardonagh Midco 3 plc, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		1.4	[4],[5],[13]	1.3	[7],[8],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.4	[4],[5],[13]	1.4	[7],[8],[12]
Investment, Identifier [Axis]: Ares IIIR/IVR CLO Ltd., Subordinated notes
Schedule of Investments [Line Items]
Total first lien senior secured loans	[8]			20.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8]			0.0
Investment, Identifier [Axis]: Argenbright Holdings V, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				1.3
Less: funded commitments				0.0
Total unfunded commitments				1.3
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 1.3
Investment, Identifier [Axis]: Argenbright Holdings V, LLC and Amberstone Security Group Limited
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.5
Less: funded commitments		0.0
Total unfunded commitments		2.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.5
Investment, Identifier [Axis]: Argenbright Holdings V, LLC and Amberstone Security Group Limited, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.49%					11.49%		11.49%		11.49%		11.49%
Total first lien senior secured loans	[3],[4],[5]	$ 20.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 20.7
Investment, Identifier [Axis]: Argenbright Holdings V, LLC and Amberstone Security Group Limited, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.53%					11.53%		11.53%		11.53%		11.53%
Total first lien senior secured loans	[3],[4],[5]	$ 5.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	5.8
Investment, Identifier [Axis]: Argenbright Holdings V, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 21.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			20.9
Investment, Identifier [Axis]: Arrowhead Holdco Company and Arrowhead GS Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				20.0
Less: funded commitments				(5.0)
Total unfunded commitments				15.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				15.0
Investment, Identifier [Axis]: Arrowhead Holdco Company and Arrowhead GS Holdings, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.4	[4]	$ 6.7	[7]
Investment, Identifier [Axis]: Arrowhead Holdco Company and Arrowhead GS Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.68%	[2]	5.25%	[1]		8.68%	[2]	8.68%	[2]	8.68%	[2]	8.68%	[2]	5.25%	[1]	5.25%	[1]	5.25%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4],[13]	$ 27.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4],[13]	$ 27.2	[6],[7]
Investment, Identifier [Axis]: Arrowhead Holdco Company and Arrowhead GS Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.25%											5.25%		5.25%		5.25%
Total first lien senior secured loans	[6],[7],[14]			$ 3.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			3.6
Investment, Identifier [Axis]: AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.0
Less: funded commitments		0.0
Total unfunded commitments		9.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.0
Investment, Identifier [Axis]: AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	9.5
Investment, Identifier [Axis]: AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	198.5
Investment, Identifier [Axis]: AthenaHealth Group Inc., VVC Holding Corp, Virence Intermediate Holding Corp, and Virence Holdings LLC, Class A interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			49.3
Investment, Identifier [Axis]: Athenahealth, Inc., VVC Holding Corp., Virence Intermediate Holding Corp., and Virence Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				33.1
Less: funded commitments				0.0
Total unfunded commitments				33.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				33.1
Investment, Identifier [Axis]: Athyrium Buffalo LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.5
Less: funded commitments		(7.6)
Total unfunded commitments		7.9
Less: commitments substantially at discretion of the Company		7.9
Total net adjusted unfunded revolving and delayed draw commitments		0.0
Investment, Identifier [Axis]: Athyrium Buffalo LP, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	7.5
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.8		0.4
Less: funded commitments		(0.2)		0.0
Total unfunded commitments		0.6		0.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.6		$ 0.4
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.50%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 0.2	[6],[7]
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.50%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 2.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	2.1	[6],[7]
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: Atlas Intermediate III, L.L.C., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.10%					10.10%		10.10%		10.10%		10.10%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.2
Investment, Identifier [Axis]: Automotive Keys Group, LLC and Automotive Keys Investor, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		$ 0.6	[7]
Investment, Identifier [Axis]: Automotive Keys Group, LLC and Automotive Keys Investor, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.93%	[2]	6.00%	[1]		10.93%	[2]	10.93%	[2]	10.93%	[2]	10.93%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 5.3	[3],[4]	$ 10.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.3	[3],[4]	10.0	[6],[7]
Investment, Identifier [Axis]: Automotive Keys Group, LLC and Automotive Keys Investor, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.73%					9.73%		9.73%		9.73%		9.73%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: Automotive Keys Group, LLC and Automotive Keys Investor, LLC, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.2	[4]	$ 4.5
Investment, Identifier [Axis]: Avalara, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.7
Less: funded commitments		0.0
Total unfunded commitments		2.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.7
Investment, Identifier [Axis]: Avalara, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.83%					11.83%		11.83%		11.83%		11.83%
Total first lien senior secured loans	[3],[4]	$ 72.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	70.4
Investment, Identifier [Axis]: Aventine Intermediate LLC & Aventine Holdings II LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.2
Less: funded commitments		0.0
Total unfunded commitments		0.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2
Investment, Identifier [Axis]: Aventine Intermediate LLC & Aventine Holdings II LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		10.38%	[2]	6.75%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 9.4	[3],[4]	$ 6.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.3	[3],[4]	$ 6.5	[6],[7]
Investment, Identifier [Axis]: Aventine Intermediate LLC & Aventine Holdings II LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.25%											10.25%		10.25%		10.25%
Total first lien senior secured loans		39.4	[4]	$ 35.6	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 36.2	[4]	35.3	[7]
Investment, Identifier [Axis]: Aventine Intermediate LLC and Aventine Holdings II LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				2.6
Less: funded commitments				0.0
Total unfunded commitments				2.6
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				2.6
Investment, Identifier [Axis]: Aventiv Technologies, LLC and Securus Technologies Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.23%					9.23%		9.23%		9.23%		9.23%
Total first lien senior secured loans	[3],[4],[11]	$ 9.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 6.8
Investment, Identifier [Axis]: Aventiv Technologies, LLC and Securus Technologies Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.66%					12.66%		12.66%		12.66%		12.66%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.2
Investment, Identifier [Axis]: Avetta, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.2		4.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.2		4.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.2		$ 4.2
Investment, Identifier [Axis]: Avetta, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.16%	[2]	7.25%	[1]		10.16%	[2]	10.16%	[2]	10.16%	[2]	10.16%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 11.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	11.8	[6],[7]
Investment, Identifier [Axis]: AxiomSL Group, Inc. and Calypso Group, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.9		3.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.9		3.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.9		$ 3.9
Investment, Identifier [Axis]: AxiomSL Group, Inc. and Calypso Group, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	7.00%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 21.2	[3],[4]	$ 21.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		21.2	[3],[4]	21.2	[6],[7]
Investment, Identifier [Axis]: Axiomatic, LLC, Class A-1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.3
Investment, Identifier [Axis]: BAART Programs, Inc., MedMark Services, Inc., and Canadian Addiction Treatment Centres LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.0
Less: funded commitments		0.0
Total unfunded commitments		2.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.0
Investment, Identifier [Axis]: BAART Programs, Inc., MedMark Services, Inc., and Canadian Addiction Treatment Centres LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.73%					9.73%		9.73%		9.73%		9.73%
Total first lien senior secured loans	[3],[4]	$ 6.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	5.9
Investment, Identifier [Axis]: BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.9	[4]	$ 4.1	[7]
Investment, Identifier [Axis]: BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.02%	[2]	7.00%	[1]		11.02%	[2]	11.02%	[2]	11.02%	[2]	11.02%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 0.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3],[4]	0.2	[6],[7]
Investment, Identifier [Axis]: BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		5.0	[4]	4.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.9	[4]	4.5	[7]
Investment, Identifier [Axis]: BH-Sharp Holdings LP, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 2.3
Investment, Identifier [Axis]: BW Landco LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				0.0
Sales (cost)				20.9
Interest income				0.0
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				20.8
Net unrealized gains (losses):				(16.0)
Fair Value				$ 0.0
Investment, Identifier [Axis]: Badger Sportswear Acquisition, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.57%	[2]	10.25%	[1]		13.57%	[2]	13.57%	[2]	13.57%	[2]	13.57%	[2]	10.25%	[1]	10.25%	[1]	10.25%	[1]
Total first lien senior secured loans		$ 56.8	[3],[4]	$ 56.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		56.8	[3],[4]	56.8	[6],[7]
Investment, Identifier [Axis]: Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P., Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 10.5	[4]	$ 5.5	[7]
Investment, Identifier [Axis]: Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.73%	[2]	7.50%	[1]		11.73%	[2]	11.73%	[2]	11.73%	[2]	11.73%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 29.5	[3],[4]	$ 29.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		29.5	[3],[4]	29.4	[6],[7]
Investment, Identifier [Axis]: Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		25.4	[4]	22.7	[7]
Investment, Identifier [Axis]: Bambino Group Holdings, LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.9	[4]	1.1	[7]
Investment, Identifier [Axis]: Bamboo Purchaser, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				4.1
Less: funded commitments				0.0
Total unfunded commitments				4.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 4.1
Investment, Identifier [Axis]: Bamboo Purchaser, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.73%	[2]	6.75%	[1]		10.73%	[2]	10.73%	[2]	10.73%	[2]	10.73%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 17.9	[3],[4]	$ 39.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		17.4	[3],[4]	38.6	[6],[7]
Investment, Identifier [Axis]: Banyan Software Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				33.8
Less: funded commitments				0.0
Total unfunded commitments				33.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 33.8
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.0
Less: funded commitments		(0.9)
Total unfunded commitments		7.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 7.1
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.75%											7.75%		7.75%		7.75%
Total first lien senior secured loans	[6],[7]			$ 6.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 6.7
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.23%					11.23%		11.23%		11.23%		11.23%
Total first lien senior secured loans	[3],[4]	$ 20.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 20.3
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	7.75%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4]	$ 7.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.0	[3],[4]	$ 7.7	[6],[7]
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 5.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			5.0
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.88%					10.88%		10.88%		10.88%		10.88%
Total first lien senior secured loans	[3],[4]	$ 0.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.9
Investment, Identifier [Axis]: Banyan Software Holdings, LLC and Banyan Software, LP, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	5.4
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.5		9.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		5.5		9.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 5.5		$ 9.0
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.39%	[2]	6.00%	[1]		9.39%	[2]	9.39%	[2]	9.39%	[2]	9.39%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 17.9	[3],[4],[5]	$ 14.5	[6],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		17.7	[3],[4],[5]	14.4	[6],[8]
Investment, Identifier [Axis]: Bearcat Buyer, Inc. and Bearcat Parent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				32.8
Less: funded commitments				0.0
Total unfunded commitments				32.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				32.8
Investment, Identifier [Axis]: Bearcat Buyer, Inc. and Bearcat Parent, Inc., Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 10.8
Investment, Identifier [Axis]: Bearcat Buyer, Inc. and Bearcat Parent, Inc., Second lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.25%											9.25%		9.25%		9.25%
Total first lien senior secured loans	[6],[7]			$ 69.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 69.5
Investment, Identifier [Axis]: Bearcat Buyer, Inc. and Bearcat Parent, Inc., Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.25%											9.25%		9.25%		9.25%
Total first lien senior secured loans	[6],[7]			$ 12.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			12.7
Investment, Identifier [Axis]: Belfor Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		25.0		25.0
Less: funded commitments		(17.0)		(4.0)
Total unfunded commitments		8.0		21.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.0		$ 21.0
Investment, Identifier [Axis]: Belfor Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		7.25%	[2]	5.50%	[1]		7.25%	[2]	7.25%	[2]	7.25%	[2]	7.25%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 11.6	[4],[13]	$ 0.0	[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.1	[4],[13]	0.0	[7],[14]
Investment, Identifier [Axis]: Belfor Holdings, Inc., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.25%					10.25%		10.25%		10.25%		10.25%
Total first lien senior secured loans	[4],[13]	$ 1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[13]	1.4
Investment, Identifier [Axis]: Benecon Midco II LLC and Locutus Holdco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.5		4.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.5		4.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.5		4.5
Investment, Identifier [Axis]: Benecon Midco II LLC and Locutus Holdco LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.1		15.5
Investment, Identifier [Axis]: Benefytt Technologies, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.9		5.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.9		5.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.9		$ 5.9
Investment, Identifier [Axis]: Benefytt Technologies, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		13.16%	[2]	6.75%	[1]		13.16%	[2]	13.16%	[2]	13.16%	[2]	13.16%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 29.1	[3],[4]	$ 23.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		23.9	[3],[4]	23.2	[6],[7]
Investment, Identifier [Axis]: Berner Food & Beverage, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.7		1.7
Less: funded commitments		(0.5)		(0.7)
Total unfunded commitments		1.2		1.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.2		$ 1.0
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		12.00%	[2]	8.75%	[1]		12.00%	[2]	12.00%	[2]	12.00%	[2]	12.00%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 0.4	[3],[4]	$ 0.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.4	[3],[4]	$ 0.4	[6],[7]
Investment, Identifier [Axis]: Berner Food & Beverage, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.91%	[2]	7.50%	[1]		9.91%	[2]	9.91%	[2]	9.91%	[2]	9.91%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	$ 0.3	[6],[7]
Investment, Identifier [Axis]: Birch Permian, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.50%											9.50%		9.50%		9.50%
Total first lien senior secured loans	[6],[7]			$ 75.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			75.7
Investment, Identifier [Axis]: Blue Angel Buyer 1, LLC and Blue Angel Holdco, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				0.0
Sales (cost)				9.7
Interest income				0.0
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				46.3
Net unrealized gains (losses):				(18.4)
Fair Value				0.0
Investment, Identifier [Axis]: Blue Wolf Capital Fund II, L.P.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.5
Net unrealized gains (losses):		(0.2)		0.0
Fair Value		0.1		0.2
Investment, Identifier [Axis]: Blue Wolf Capital Fund II, L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[5],[11]	0.2	[8],[12]
Investment, Identifier [Axis]: BlueHalo Financing Holdings, LLC, BlueHalo Global Holdings, LLC, and BlueHalo, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.0
Less: funded commitments		(2.8)
Total unfunded commitments		0.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2
Investment, Identifier [Axis]: BlueHalo Financing Holdings, LLC, BlueHalo Global Holdings, LLC, and BlueHalo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.70%					10.70%		10.70%		10.70%		10.70%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.0
Investment, Identifier [Axis]: BlueHalo Financing Holdings, LLC, BlueHalo Global Holdings, LLC, and BlueHalo, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.72%					10.72%		10.72%		10.72%		10.72%
Total first lien senior secured loans	[3],[4]	$ 2.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	2.7
Investment, Identifier [Axis]: Borrower R365 Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.9		1.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.9		1.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.9		$ 1.5
Investment, Identifier [Axis]: Borrower R365 Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7]			$ 15.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			15.5
Investment, Identifier [Axis]: Borrower R365 Holdings LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon	[2]	8.23%					8.23%		8.23%		8.23%		8.23%
Total first lien senior secured loans	[3],[4]	$ 15.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 15.9
Investment, Identifier [Axis]: Borrower R365 Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon	[2]	8.23%					8.23%		8.23%		8.23%		8.23%
Total first lien senior secured loans	[3],[4]	$ 1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.4
Investment, Identifier [Axis]: Bottomline Technologies, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3
Less: funded commitments		0.0
Total unfunded commitments		2.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.3
Investment, Identifier [Axis]: Bottomline Technologies, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.82%					9.82%		9.82%		9.82%		9.82%
Total first lien senior secured loans	[3],[4]	$ 18.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	17.6
Investment, Identifier [Axis]: Bowhunter Holdings, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: Bragg Live Food Products, LLC and SPC Investment Co., L.P.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		3.3		4.6
Redemptions (cost)		5.7		7.8
Sales (cost)		9.8		0.0
Interest income		3.4		3.1
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.2
Other income		0.2		0.1
Net realized gains (losses):		(0.2)		0.0
Net unrealized gains (losses):		3.5		(4.4)
Fair Value		39.1		47.8
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.4		4.4
Less: funded commitments		0.0		(1.7)
Total unfunded commitments		4.4		2.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.4		2.7
Investment, Identifier [Axis]: Bragg Live Food Products, LLC and SPC Investment Co., L.P., Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 10.8	[4]	$ 8.8	[7]
Investment, Identifier [Axis]: Bragg Live Food Products, LLC and SPC Investment Co., L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6]			$ 39.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 37.4
Investment, Identifier [Axis]: Bragg Live Food Products, LLC and SPC Investment Co., L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.58%	[2]	7.25%	[1]		11.58%	[2]	11.58%	[2]	11.58%	[2]	11.58%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 28.9	[3],[4]	$ 1.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 28.3	[3],[4]	1.6	[6],[7]
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.67%					9.67%		9.67%		9.67%		9.67%
Total first lien senior secured loans	[3],[4],[11]	$ 4.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	4.3
Investment, Identifier [Axis]: Businessolver.com, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.6		18.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.6		18.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.6		$ 18.9
Investment, Identifier [Axis]: Businessolver.com, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.67%	[2]	6.50%	[1]		9.67%	[2]	9.67%	[2]	9.67%	[2]	9.67%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 14.7	[3],[4]	$ 70.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		14.5	[3],[4]	69.5	[6],[7]
Investment, Identifier [Axis]: CCS-CMGC Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.0		12.0
Less: funded commitments		(3.7)		(3.0)
Total unfunded commitments		8.3		9.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.3		$ 9.0
Investment, Identifier [Axis]: CCS-CMGC Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.91%	[2]	5.63%	[1]		9.91%	[2]	9.91%	[2]	9.91%	[2]	9.91%	[2]	5.63%	[1]	5.63%	[1]	5.63%	[1]
Total first lien senior secured loans		$ 33.6	[4],[11]	$ 34.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.2	[4],[11]	$ 33.3
Investment, Identifier [Axis]: CCS-CMGC Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: CDI Holdings III Corp. and CDI Holdings I Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.9		0.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.9		0.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.9		0.9
Investment, Identifier [Axis]: CDI Holdings III Corp. and CDI Holdings I Corp., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.4	[4]	$ 6.1	[7]
Investment, Identifier [Axis]: CDI Holdings III Corp. and CDI Holdings I Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.75%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 3.8	[3],[4]	$ 3.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.6	[3],[4]	3.8	[6],[7]
Investment, Identifier [Axis]: CHG PPC Parent LLC & PPC CHG Blocker LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.9	[4]	$ 3.0	[7]
Investment, Identifier [Axis]: CHG PPC Parent LLC & PPC CHG Blocker LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.13%	[2]	7.25%	[1]		11.13%	[2]	11.13%	[2]	11.13%	[2]	11.13%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 94.6	[3],[4]	$ 94.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		89.9	[3],[4]	93.7	[6],[7]
Investment, Identifier [Axis]: CMG HoldCo, LLC and CMG Buyer Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.2
Less: funded commitments		(0.4)
Total unfunded commitments		9.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.8
Investment, Identifier [Axis]: CMG HoldCo, LLC and CMG Buyer Holdings, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 4.6
Investment, Identifier [Axis]: CMG HoldCo, LLC and CMG Buyer Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.52%					9.52%		9.52%		9.52%		9.52%
Total first lien senior secured loans	[3],[4]	$ 21.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 21.4
Investment, Identifier [Axis]: CMG HoldCo, LLC and CMG Buyer Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.40%					9.40%		9.40%		9.40%		9.40%
Total first lien senior secured loans	[3],[4]	$ 3.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 3.7
Investment, Identifier [Axis]: CMG HoldCo, LLC and CMG Buyer Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.47%					9.47%		9.47%		9.47%		9.47%
Total first lien senior secured loans		$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.4
Investment, Identifier [Axis]: CMW Parent LLC (fka Black Arrow, Inc.), Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0	[7]
Investment, Identifier [Axis]: CREST Exeter Street Solar 2004-1, Preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[5]	0.0	[8]
Investment, Identifier [Axis]: CST Buyer Company (d/b/a Intoxalock)
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.1
Less: funded commitments				0.0
Total unfunded commitments				6.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				6.1
Investment, Identifier [Axis]: CST Holding Company
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.9
Less: funded commitments		(0.2)
Total unfunded commitments		1.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.7
Investment, Identifier [Axis]: CST Holding Company, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.97%					10.97%		10.97%		10.97%		10.97%
Total first lien senior secured loans	[3],[4]	$ 11.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 11.4
Investment, Identifier [Axis]: CST Holding Company, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.97%					10.97%		10.97%		10.97%		10.97%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.2
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		25.8		19.7
Less: funded commitments		0.0		(0.4)
Total unfunded commitments		25.8		19.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		25.8		19.3
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 22.7	[4]	$ 15.9	[7]
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate		11.13%	[2]	6.25%	[1]		11.13%	[2]	11.13%	[2]	11.13%	[2]	11.13%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 49.5	[3],[4]	$ 39.4	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 49.0	[3],[4]	$ 39.4	[6]
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.13%	[2]	6.75%	[1]		11.13%	[2]	11.13%	[2]	11.13%	[2]	11.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 38.9	[3],[4]	$ 49.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 38.5	[3],[4]	$ 49.2	[6],[7]
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 1.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.6
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.13%					11.13%		11.13%		11.13%		11.13%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7],[14]			$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			0.4
Investment, Identifier [Axis]: Cadence Aerospace, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.3		15.1
Less: funded commitments		(14.8)		(11.7)
Total unfunded commitments		0.5		3.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.5		$ 3.4
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon	[2]	12.92%					12.92%		12.92%		12.92%		12.92%
Total first lien senior secured loans	[3],[4]	$ 31.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 30.5
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.50%											9.50%		9.50%		9.50%
Total first lien senior secured loans	[6]			$ 31.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 30.5
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon		12.92%	[2]	9.50%	[1]		12.92%	[2]	12.92%	[2]	12.92%	[2]	12.92%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 11.9	[3],[4]	$ 9.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.6	[3],[4]	$ 9.5	[6],[7]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon		12.92%	[2]	9.50%	[1]		12.92%	[2]	12.92%	[2]	12.92%	[2]	12.92%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 9.7	[3],[4]	$ 12.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.5	[3],[4]	11.6	[6],[7]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon	[2]	2.00%					2.00%		2.00%		2.00%		2.00%
Total first lien senior secured loans		$ 7.8	[3],[4]	7.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.6	[3],[4]	$ 7.6	[6],[7]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured loan 5
Schedule of Investments [Line Items]
Coupon		12.92%	[2]	9.50%	[1]		12.92%	[2]	12.92%	[2]	12.92%	[2]	12.92%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 5.3	[3],[4]	$ 4.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.2	[3],[4]	$ 3.9	[6]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon		12.92%	[2]	9.50%	[1]		12.92%	[2]	12.92%	[2]	12.92%	[2]	12.92%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 13.7	[3],[4],[13]	$ 7.9	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 13.4	[3],[4],[13]	$ 7.6	[6],[7],[14]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon		12.92%	[2]	8.75%	[1]		12.92%	[2]	12.92%	[2]	12.92%	[2]	12.92%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4]	$ 3.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.0	[3],[4]	$ 2.9	[6]
Investment, Identifier [Axis]: Cadence Aerospace, LLC, First lien senior secured revolving loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.50%											9.50%		9.50%		9.50%
Total first lien senior secured loans	[6],[7]			$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.7
Investment, Identifier [Axis]: Caerus Midco 3 S.à r.l.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.1
Less: funded commitments		0.0
Total unfunded commitments		4.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.1
Investment, Identifier [Axis]: Caerus Midco 3 S.à r.l., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.83%					9.83%		9.83%		9.83%		9.83%
Total first lien senior secured loans	[3],[4],[5]	$ 5.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	5.3
Investment, Identifier [Axis]: CallMiner, Inc., Warrant to purchase shares of Series 1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: CallMiner, Inc., Warrant to purchase up to 2,350,636 shares of Series 1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0
Investment, Identifier [Axis]: Calyx Energy III, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.37%					12.37%		12.37%		12.37%		12.37%
Total first lien senior secured loans	[3],[4]	$ 57.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	57.0
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.3		27.3
Less: funded commitments		(8.8)		(11.2)
Total unfunded commitments		6.5		16.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		6.5		16.1
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 20.1	[4]	$ 14.4	[7]
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.13%	[2]	5.75%	[1]		9.13%	[2]	9.13%	[2]	9.13%	[2]	9.13%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 0.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3],[4]	$ 0.3	[6],[7]
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans		0.0	[15]	$ 2.3	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[15]	$ 2.3	[6],[7],[14]
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.13%	[2]	9.75%	[1]		13.13%	[2]	13.13%	[2]	13.13%	[2]	13.13%	[2]	9.75%	[1]	9.75%	[1]	9.75%	[1]
Total first lien senior secured loans		$ 68.3	[3],[4]	$ 68.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		68.3	[3],[4]	68.3	[6],[7]
Investment, Identifier [Axis]: Captive Resources Midco, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.2
Less: funded commitments		0.0
Total unfunded commitments		1.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.2
Investment, Identifier [Axis]: Captive Resources Midco, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.20%					7.20%		7.20%		7.20%		7.20%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.0		5.0
Less: funded commitments		(3.4)		(0.6)
Total unfunded commitments		1.6		4.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.6		$ 4.4
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.00%	[2]	6.75%	[1]		11.00%	[2]	11.00%	[2]	11.00%	[2]	11.00%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 3.4	[3],[4]	$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.0	[3],[4]	$ 0.6	[6],[7]
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.46%	[2]	8.50%	[1]		12.46%	[2]	12.46%	[2]	12.46%	[2]	12.46%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 64.3	[3],[4]	$ 59.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		57.8	[3],[4]	59.9	[6],[7]
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.3	[4]	28.0	[7]
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc., Series A-2 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.4	[4]	10.1	[7]
Investment, Identifier [Axis]: Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc., Series A-3 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		11.1	[4]	13.4	[7]
Investment, Identifier [Axis]: Center for Autism and Related Disorders, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		20.4		8.5
Less: funded commitments		(9.0)		(8.3)
Total unfunded commitments		11.4		0.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		(11.4)		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.0		$ 0.2
Investment, Identifier [Axis]: Center for Autism and Related Disorders, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[9]	9.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[9]	4.0
Investment, Identifier [Axis]: Center for Autism and Related Disorders, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[9]	2.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[9]	0.9
Investment, Identifier [Axis]: Center for Autism and Related Disorders, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.65%											5.65%		5.65%		5.65%
Total first lien senior secured loans		6.8	[4],[9]	$ 6.8	[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.9	[4],[9]	6.2	[7],[14]
Investment, Identifier [Axis]: Center for Autism and Related Disorders, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[9]	0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[9]	0.2
Investment, Identifier [Axis]: Centric Brands LLC and Centric Brands GP LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.6		7.9
Less: funded commitments		(5.0)		(2.3)
Total unfunded commitments		3.6		5.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.6		$ 5.6
Investment, Identifier [Axis]: Centric Brands LLC and Centric Brands GP LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		13.30%	[2]	10.00%	[1]		13.30%	[2]	13.30%	[2]	13.30%	[2]	13.30%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 75.4	[3],[4]	$ 67.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 70.9	[3],[4]	$ 67.3	[6],[7]
Investment, Identifier [Axis]: Centric Brands LLC and Centric Brands GP LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.70%	[2]	6.50%	[1]		9.70%	[2]	9.70%	[2]	9.70%	[2]	9.70%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 5.0	[3],[4]	$ 2.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.7	[3],[4]	2.3	[6],[7]
Investment, Identifier [Axis]: Centric Brands LLC and Centric Brands GP LLC, Membership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.9	[4]	11.5	[7]
Investment, Identifier [Axis]: Chariot Buyer LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.3		12.3
Less: funded commitments		(3.5)		(2.8)
Total unfunded commitments		8.8		9.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.8		$ 9.5
Investment, Identifier [Axis]: Chariot Buyer LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		7.38%	[2]	5.75%	[1]		7.38%	[2]	7.38%	[2]	7.38%	[2]	7.38%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 3.5	[4]	$ 0.2	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.2	[4]	$ 0.2	[7]
Investment, Identifier [Axis]: Chariot Buyer LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			3.60%											3.60%		3.60%		3.60%
Total first lien senior secured loans	[7]			$ 2.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 2.5
Investment, Identifier [Axis]: Chariot Buyer LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.13%	[2]	7.50%	[1]		11.13%	[2]	11.13%	[2]	11.13%	[2]	11.13%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 134.4	[3],[4]	$ 134.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		126.3	[3],[4]	$ 133.0	[6],[7]
Investment, Identifier [Axis]: Cheyenne Petroleum Company Limited Partnership, CPC 2001 LLC and Mill Shoals LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.5
Less: funded commitments		0.0
Total unfunded commitments		9.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 9.5
Investment, Identifier [Axis]: Cheyenne Petroleum Company Limited Partnership, CPC 2001 LLC and Mill Shoals LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.69%	[2]	10.00%	[1]		13.69%	[2]	13.69%	[2]	13.69%	[2]	13.69%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 49.3	[3],[4]	$ 63.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 47.8	[3],[4]	$ 63.1	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		15.48%	[2]	11.75%	[1]		15.48%	[2]	15.48%	[2]	15.48%	[2]	15.48%	[2]	11.75%	[1]	11.75%	[1]	11.75%	[1]
Total first lien senior secured loans		$ 68.2	[3],[4]	$ 68.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 66.9	[3],[4]	$ 61.4	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		15.48%	[2]	11.75%	[1]		15.48%	[2]	15.48%	[2]	15.48%	[2]	15.48%	[2]	11.75%	[1]	11.75%	[1]	11.75%	[1]
Total first lien senior secured loans		$ 30.0	[3],[4]	$ 15.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 29.4	[3],[4]	13.6	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	15.48%					15.48%		15.48%		15.48%		15.48%
Total first lien senior secured loans		$ 20.0	[3],[4]	15.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 19.6	[3],[4]	$ 13.9	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		15.48%	[2]	11.75%	[1]		15.48%	[2]	15.48%	[2]	15.48%	[2]	15.48%	[2]	11.75%	[1]	11.75%	[1]	11.75%	[1]
Total first lien senior secured loans		$ 15.5	[3],[4]	$ 20.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.2	[3],[4]	$ 18.0	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 5
Schedule of Investments [Line Items]
Coupon | Rate		15.23%	[2]	11.75%	[1]		15.23%	[2]	15.23%	[2]	15.23%	[2]	15.23%	[2]	11.75%	[1]	11.75%	[1]	11.75%	[1]
Total first lien senior secured loans		$ 12.2	[3],[4]	$ 3.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.9	[3],[4]	$ 2.7	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 6
Schedule of Investments [Line Items]
Coupon | Rate		15.48%	[2]	11.75%	[1]		15.48%	[2]	15.48%	[2]	15.48%	[2]	15.48%	[2]	11.75%	[1]	11.75%	[1]	11.75%	[1]
Total first lien senior secured loans		$ 4.9	[3],[4]	$ 4.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.8	[3],[4]	4.4	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 7
Schedule of Investments [Line Items]
Coupon | Rate	[2]	15.48%					15.48%		15.48%		15.48%		15.48%
Total first lien senior secured loans		$ 3.0	[3],[4]	30.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.0	[3],[4]	27.0	[6],[7]
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., First lien senior secured loan 8
Schedule of Investments [Line Items]
Coupon | Rate	[2]	15.48%					15.48%		15.48%		15.48%		15.48%
Total first lien senior secured loans	[3],[4]	$ 3.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	3.0
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., Warrant
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			3.4
Investment, Identifier [Axis]: Cipriani USA, Inc. and Cipriani Group Holding S.A.R.L., Warrants to purchase units of shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	8.8
Investment, Identifier [Axis]: CoLTs 2005-1 Ltd.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.0		0.0
Fair Value		0.0		0.0
Investment, Identifier [Axis]: CoLTs 2005-1 Ltd., Preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[5]	0.0	[8]
Investment, Identifier [Axis]: CoLTs 2005-2 Ltd.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				0.0
Sales (cost)				0.0
Interest income				0.0
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				0.2
Net unrealized gains (losses):				0.0
Fair Value				0.0
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.8
Less: funded commitments		(2.5)
Total unfunded commitments		5.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		5.3
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				23.7
Less: funded commitments				(0.6)
Total unfunded commitments				23.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				23.1
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc., Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[4]	$ 2.8	[7]
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.63%	[2]	6.00%	[1]		9.63%	[2]	9.63%	[2]	9.63%	[2]	9.63%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 30.2	[3]	$ 29.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 29.0	[3]	$ 28.8	[6],[7]
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.63%	[2]	6.00%	[1]		9.63%	[2]	9.63%	[2]	9.63%	[2]	9.63%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 2.5	[3],[4]	$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.4	[3],[4]	0.6	[6],[7]
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc., Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.0	[4]	$ 0.3	[7]
Investment, Identifier [Axis]: Cobalt Buyer Sub, Inc., Cobalt Holdings I, LP, and Cobalt Intermediate I, Inc., Series A preferred shares
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.75%											10.75%		10.75%		10.75%
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 69.7	[4]	$ 60.2	[6],[7]
Investment, Identifier [Axis]: Color Intermediate, LLC First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.08%					10.08%		10.08%		10.08%		10.08%
Total first lien senior secured loans	[3],[4]	$ 20.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	19.5
Investment, Identifier [Axis]: Commercial Trailer Leasing, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.6		3.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.6		3.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.6		$ 3.3
Investment, Identifier [Axis]: Commercial Trailer Leasing, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.33%	[2]	7.25%	[1]		10.33%	[2]	10.33%	[2]	10.33%	[2]	10.33%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 33.3	[3],[4]	$ 92.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 33.3	[3],[4]	$ 92.8	[6],[7]
Investment, Identifier [Axis]: Commercial Trailer Leasing, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.00%	[2]	13.00%	[1]		13.00%	[2]	13.00%	[2]	13.00%	[2]	13.00%	[2]	13.00%	[1]	13.00%	[1]	13.00%	[1]
Total first lien senior secured loans		$ 19.9	[4]	$ 19.9	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		19.5	[4]	19.9	[7]
Investment, Identifier [Axis]: Community Brands ParentCo, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.2
Less: funded commitments		0.0
Total unfunded commitments		7.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.2
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 6.4
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.17%					10.17%		10.17%		10.17%		10.17%
Total first lien senior secured loans	[3],[4]	$ 10.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	10.4
Investment, Identifier [Axis]: Compex Legal Services, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.6
Less: funded commitments		(1.8)
Total unfunded commitments		1.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.8
Investment, Identifier [Axis]: Compex Legal Services, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.51%					9.51%		9.51%		9.51%		9.51%
Total first lien senior secured loans	[3],[4]	$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.8
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.9		1.9
Less: funded commitments		(0.8)		(0.3)
Total unfunded commitments		1.1		1.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.1		$ 1.6
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.59%					10.59%		10.59%		10.59%		10.59%
Total first lien senior secured loans	[3],[4]	$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.3
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 2.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 2.6
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7]			$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.1
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.6
Investment, Identifier [Axis]: Comprehensive EyeCare Partners, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.58%	[2]	7.00%	[1]		10.58%	[2]	10.58%	[2]	10.58%	[2]	10.58%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 0.8	[3],[4]	$ 0.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.7	[3],[4]	0.3	[6],[7]
Investment, Identifier [Axis]: Computer Services, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.15%					11.15%		11.15%		11.15%		11.15%
Total first lien senior secured loans	[3],[4]	$ 34.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	33.0
Investment, Identifier [Axis]: Concert Golf Partners Holdco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.1		0.6
Less: funded commitments		0.0		(0.1)
Total unfunded commitments		3.1		0.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.1		$ 0.5
Investment, Identifier [Axis]: Concert Golf Partners Holdco LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.50%											5.50%		5.50%		5.50%
Total first lien senior secured loans	[6],[7]			$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.1
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				20.0
Less: funded commitments				0.0
Total unfunded commitments				20.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				20.0
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P., Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 6.0
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[7],[8]			$ 27.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 27.5
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7],[8]			$ 32.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 32.6
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7],[8]			$ 3.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 3.8
Investment, Identifier [Axis]: Consilio Midco Limited and Consilio Investment Holdings, L.P., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7],[8]			$ 11.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 11.2
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.2
Less: funded commitments		(0.8)
Total unfunded commitments		13.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		13.4
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 6.5
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4],[5]	$ 11.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 11.4
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[4],[5]	$ 74.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 72.6
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.39%					8.39%		8.39%		8.39%		8.39%
Total first lien senior secured loans	[3],[4],[5]	$ 26.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 26.1
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.32%					8.32%		8.32%		8.32%		8.32%
Total first lien senior secured loans	[3],[4],[5]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	0.8
Investment, Identifier [Axis]: Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P., Series A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 0.0
Investment, Identifier [Axis]: Continental Acquisition Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.75%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 36.2	[3],[4]	$ 36.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 33.3	[3],[4]	$ 36.5	[6],[7]
Investment, Identifier [Axis]: Continental Acquisition Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.75%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 5.4	[3],[4]	$ 33.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.9	[3],[4]	$ 33.2	[6],[7]
Investment, Identifier [Axis]: Continental Cafe, LLC and Infinity Ovation Yacht Charters, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7]			$ 15.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			15.5
Investment, Identifier [Axis]: Continental Café, LLC and Infinity Ovation Yacht Charters, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.0		8.0
Less: funded commitments		(0.7)		0.0
Total unfunded commitments		7.3		8.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 7.3		$ 8.0
Investment, Identifier [Axis]: Continental Café, LLC and Infinity Ovation Yacht Charters, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.38%					11.38%		11.38%		11.38%		11.38%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Continental Café, LLC and Infinity Ovation Yacht Charters, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.50%					13.50%		13.50%		13.50%		13.50%
Total first lien senior secured loans	[3],[4]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.7
Investment, Identifier [Axis]: Convera International Holdings Limited and Convera International Financial S.A R.L.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3
Less: funded commitments		0.0
Total unfunded commitments		2.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.3
Investment, Identifier [Axis]: Convera International Holdings Limited and Convera International Financial S.A R.L., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.33%					10.33%		10.33%		10.33%		10.33%
Total first lien senior secured loans	[3],[4],[5]	$ 62.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 62.8
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.50%											5.50%		5.50%		5.50%
Total first lien senior secured loans	[6]			$ 2.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			2.7
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3],[4],[5]	$ 2.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 2.6
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.83%					9.83%		9.83%		9.83%		9.83%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.1
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.93%					9.93%		9.93%		9.93%		9.93%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	0.1
Investment, Identifier [Axis]: CoreLogic, Inc. and T-VIII Celestial Co-Invest LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		38.9		38.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		38.9		38.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		38.9		38.9
Investment, Identifier [Axis]: CoreLogic, Inc. and T-VIII Celestial Co-Invest LP, Limited partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 48.8	[4]	$ 77.9	[7]
Investment, Identifier [Axis]: CoreLogic, Inc. and T-VIII Celestial Co-Invest LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.94%	[2]	7.00%	[1]		10.94%	[2]	10.94%	[2]	10.94%	[2]	10.94%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 155.7	[3],[4]	$ 155.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		129.2	[3],[4]	155.7	[6],[7]
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., Common equity
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 0.0
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.31%					10.31%		10.31%		10.31%		10.31%
Total first lien senior secured loans	[3],[4],[5]	$ 6.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 6.2
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.06%					9.06%		9.06%		9.06%		9.06%
Total first lien senior secured loans	[3],[4],[5]	$ 4.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 4.3
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.06%					11.06%		11.06%		11.06%		11.06%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.1
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.06%					9.06%		9.06%		9.06%		9.06%
Total first lien senior secured loans	[3],[4],[5]	$ 6.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	6.2
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc. and Cority Parent, Inc., Preferred equity
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	0.7
Investment, Identifier [Axis]: Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1
Less: funded commitments		0.0
Total unfunded commitments		0.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.1
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				0.1
Less: funded commitments				0.0
Total unfunded commitments				0.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				0.1
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc., Common equity
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 0.0
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[8]			$ 6.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[8]			$ 6.3
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[8]			$ 4.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[8]			$ 4.4
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7],[8]			$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			1.1
Investment, Identifier [Axis]: Cority Software Inc., IQS, Inc. and Cority Parent, Inc., Preferred equity
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			0.6
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		38.7		38.7
Less: funded commitments		(22.7)		(0.1)
Total unfunded commitments		16.0		38.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		16.0		38.6
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc., Class A-1 common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.2	[4]	$ 13.3	[7]
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		7.51%	[2]	0.00%	[1]		7.51%	[2]	7.51%	[2]	7.51%	[2]	7.51%	[2]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Total first lien senior secured loans	[4],[13]	$ 21.9
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 19.7	[4],[13]	$ 0.0	[16]
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.88%	[2]	7.00%	[1]		10.88%	[2]	10.88%	[2]	10.88%	[2]	10.88%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 137.5	[3],[4]	$ 137.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		123.7	[3],[4]	135.4	[6]
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		109.4	[4]	119.0	[7]
Investment, Identifier [Axis]: Covaris Intermediate 3, LLC & Covaris Parent, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		22.2
Less: funded commitments		(1.5)
Total unfunded commitments		20.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		20.7
Investment, Identifier [Axis]: Covaris Intermediate 3, LLC & Covaris Parent, LLC, Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.5
Investment, Identifier [Axis]: Covaris Intermediate 3, LLC & Covaris Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.16%					9.16%		9.16%		9.16%		9.16%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Covaris Intermediate 3, LLC & Covaris Parent, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.66%					9.66%		9.66%		9.66%		9.66%
Total first lien senior secured loans	[3],[4]	$ 1.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.5
Investment, Identifier [Axis]: Coyote Buyer, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.8
Less: funded commitments		0.0
Total unfunded commitments		5.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		5.8
Investment, Identifier [Axis]: Cozzini Bros., Inc. and BH-Sharp Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				15.0
Less: funded commitments				0.0
Total unfunded commitments				15.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				15.0
Investment, Identifier [Axis]: Cozzini Bros., Inc. and BH-Sharp Holdings LP, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 1.4
Investment, Identifier [Axis]: Cozzini Bros., Inc. and BH-Sharp Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 12.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			11.4
Investment, Identifier [Axis]: CrossCountry Mortgage, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		56.3		56.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		56.3		56.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 56.3		$ 56.3
Investment, Identifier [Axis]: CrossCountry Mortgage, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.73%	[2]	7.50%	[1]		11.73%	[2]	11.73%	[2]	11.73%	[2]	11.73%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 93.8	[3],[4]	$ 93.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		92.8	[3],[4]	92.8	[6],[7]
Investment, Identifier [Axis]: Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.2
Less: funded commitments		0.0
Total unfunded commitments		3.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.2
Investment, Identifier [Axis]: Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC, Class A shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.9
Investment, Identifier [Axis]: Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 0.3
Investment, Identifier [Axis]: Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.11%					10.11%		10.11%		10.11%		10.11%
Total first lien senior secured loans	[3],[4]	$ 24.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	24.5
Investment, Identifier [Axis]: Crown Health Care Laundry Services, LLC and Crown Laundry Holdings, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				27.2
Sales (cost)				4.5
Interest income				(0.5)
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.9
Net realized gains (losses):				10.7
Net unrealized gains (losses):				(8.0)
Fair Value				0.0
Investment, Identifier [Axis]: DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			138.1
Investment, Identifier [Axis]: DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			13.4
Investment, Identifier [Axis]: DFC Global Facility Borrower III LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		96.7		103.5
Less: funded commitments		(79.3)		(73.2)
Total unfunded commitments		17.4		30.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 17.4		$ 30.3
Investment, Identifier [Axis]: DFC Global Facility Borrower III LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.62%	[2]	8.50%	[1]		11.62%	[2]	11.62%	[2]	11.62%	[2]	11.62%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 158.6	[3],[4],[5],[17]	$ 146.4	[6],[7],[8],[18]
Participating interest sold		79.0		75.0
Secured borrowings		79.0		73.2
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 158.6	[3],[4],[5],[17]	$ 146.4	[6],[7],[8],[18]
Investment, Identifier [Axis]: DFC Global Facility Borrower III LLC, First lien senior secured revolving loan, Secured borrowing
Schedule of Investments [Line Items]
Coupon | Rate		11.62%		8.50%			11.62%		11.62%		11.62%		11.62%		8.50%		8.50%		8.50%
Investment, Identifier [Axis]: DFS Holding Company, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		9.44%	[2]	8.50%	[1]		9.44%	[2]	9.44%	[2]	9.44%	[2]	9.44%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 164.9	[3]	$ 166.7	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 164.9	[3]	$ 158.4	[6]
Investment, Identifier [Axis]: DFS Holding Company, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon		10.38%	[2]	8.50%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 6.5	[3],[4]	$ 4.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.5	[3],[4]	$ 4.1	[6],[7]
Investment, Identifier [Axis]: DFS Holding Company, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon		10.38%	[2]	8.50%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 4.3	[3],[4]	$ 5.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.3	[3],[4]	$ 4.7	[6]
Investment, Identifier [Axis]: DFS Holding Company, Inc., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			0.6
Investment, Identifier [Axis]: DRS Holdings III, Inc. and DRS Holdings I, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.8		10.8
Less: funded commitments		0.0		0.0
Total unfunded commitments		10.8		10.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		10.8		10.8
Investment, Identifier [Axis]: DRS Holdings III, Inc. and DRS Holdings I, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.2	[4]	$ 11.3	[7]
Investment, Identifier [Axis]: DRS Holdings III, Inc. and DRS Holdings I, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.47%	[2]	6.75%	[1]		10.47%	[2]	10.47%	[2]	10.47%	[2]	10.47%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 28.0	[3],[4]	$ 29.8	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 26.8	[3],[4]	$ 29.8	[6]
Investment, Identifier [Axis]: DRS Holdings III, Inc. and DRS Holdings I, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.47%	[2]	6.75%	[1]		10.47%	[2]	10.47%	[2]	10.47%	[2]	10.47%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 25.8	[3],[4]	$ 46.7	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		24.8	[3],[4]	46.7	[6]
Investment, Identifier [Axis]: DS Admiral Bidco, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.1		$ 0.1
Investment, Identifier [Axis]: DS Admiral Bidco, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.16%	[2]	6.75%	[1]		10.16%	[2]	10.16%	[2]	10.16%	[2]	10.16%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 11.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	11.9	[6],[7]
Investment, Identifier [Axis]: DTI Holdco, Inc. and OPE DTI Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.6
Less: funded commitments				(5.2)
Total unfunded commitments				1.4
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				1.4
Investment, Identifier [Axis]: DTI Holdco, Inc. and OPE DTI Holdings, Inc., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		6.3	[4]	4.2	[7]
Investment, Identifier [Axis]: DTI Holdco, Inc. and OPE DTI Holdings, Inc., Class B common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[4]	$ 0.0	[7]
Investment, Identifier [Axis]: DTI Holdco, Inc. and OPE DTI Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[7],[14]			$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[14]			$ 0.3
Investment, Identifier [Axis]: DTI Holdco, Inc. and OPE DTI Holdings, Inc., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			4.65%											4.65%		4.65%		4.65%
Total first lien senior secured loans	[7],[14]			$ 4.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[14]			$ 4.8
Investment, Identifier [Axis]: Datix Bidco Limited, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.95%	[2]	4.18%	[1]		8.95%	[2]	8.95%	[2]	8.95%	[2]	8.95%	[2]	4.18%	[1]	4.18%	[1]	4.18%	[1]
Total first lien senior secured loans		$ 4.3	[4],[5]	$ 0.1	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.2	[4],[5]	0.1	[7],[8]
Investment, Identifier [Axis]: Datix Bidco Limited, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.20%					12.20%		12.20%		12.20%		12.20%
Total first lien senior secured loans	[4],[5]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 0.7
Investment, Identifier [Axis]: Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.70%					8.70%		8.70%		8.70%		8.70%
Total first lien senior secured loans	[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 0.9
Investment, Identifier [Axis]: Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.70%					11.70%		11.70%		11.70%		11.70%
Total first lien senior secured loans	[4]	$ 11.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	10.7
Investment, Identifier [Axis]: Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., Series A preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	134.6
Investment, Identifier [Axis]: Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P., Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	12.5
Investment, Identifier [Axis]: DecoPac, Inc. and KCAKE Holdings Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		16.5		16.5
Less: funded commitments		(6.6)		(2.4)
Total unfunded commitments		9.9		14.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.9		14.1
Investment, Identifier [Axis]: DecoPac, Inc. and KCAKE Holdings Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.4	[4]	$ 10.0	[7]
Investment, Identifier [Axis]: DecoPac, Inc. and KCAKE Holdings Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		10.73%	[2]	9.00%	[1]		10.73%	[2]	10.73%	[2]	10.73%	[2]	10.73%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 148.6	[3],[4]	$ 148.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 145.6	[3],[4]	$ 148.5	[6],[7]
Investment, Identifier [Axis]: DecoPac, Inc. and KCAKE Holdings Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.73%	[2]	7.00%	[1]		10.73%	[2]	10.73%	[2]	10.73%	[2]	10.73%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 6.6	[3],[4]	$ 2.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		6.5	[3],[4]	$ 2.4	[6],[7]
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Apexco LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		11.4
Less: funded commitments		0.0
Total unfunded commitments		11.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		11.4
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Apexco LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 2.4
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Apexco LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.52%	[2]	7.00%	[1]		10.52%	[2]	10.52%	[2]	10.52%	[2]	10.52%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 37.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	36.9	[6],[7]
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Apexco LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.52%					10.52%		10.52%		10.52%		10.52%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Topco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				5.4
Less: funded commitments				0.0
Total unfunded commitments				5.4
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				5.4
Investment, Identifier [Axis]: Denali Holdco LLC and Denali Topco LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			2.5
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.2		9.7
Less: funded commitments		(0.7)		0.0
Total unfunded commitments		1.5		9.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.5		$ 9.7
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6]			$ 33.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 33.0
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.63%					10.63%		10.63%		10.63%		10.63%
Total first lien senior secured loans	[3],[4]	$ 35.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 35.2
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.63%	[2]	6.75%	[1]		10.63%	[2]	10.63%	[2]	10.63%	[2]	10.63%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 2.0	[3],[4]	$ 8.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.0	[3],[4]	$ 8.9	[6],[7]
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.75%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 11.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 11.4	[6],[7]
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	7.25%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 2.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 2.0	[6],[7]
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.63%	[2]	0.00%	[1]		10.63%	[2]	10.63%	[2]	10.63%	[2]	10.63%	[2]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Total first lien senior secured loans	[3],[4],[13]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.7	[3],[4],[13]	$ 0.0	[16]
Investment, Identifier [Axis]: Diligent Corporation and Diligent Preferred Issuer, Inc., Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		13.8	[4]	13.8	[7]
Investment, Identifier [Axis]: Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3		2.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.3		2.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.3		2.3
Investment, Identifier [Axis]: Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc., Common units
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			600.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.2	[4]	$ 1.0	[7]
Investment, Identifier [Axis]: Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.03%	[2]	6.65%	[1]		10.03%	[2]	10.03%	[2]	10.03%	[2]	10.03%	[2]	6.65%	[1]	6.65%	[1]	6.65%	[1]
Total first lien senior secured loans		$ 15.8	[3],[4]	$ 16.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.8	[3],[4]	$ 16.0	[6]
Investment, Identifier [Axis]: Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.03%	[2]	6.65%	[1]		10.03%	[2]	10.03%	[2]	10.03%	[2]	10.03%	[2]	6.65%	[1]	6.65%	[1]	6.65%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.03%	[2]	6.65%	[1]		10.03%	[2]	10.03%	[2]	10.03%	[2]	10.03%	[2]	6.65%	[1]	6.65%	[1]	6.65%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	0.1	[6],[7]
Investment, Identifier [Axis]: Drilling Info Holdings, Inc. and Titan DI Preferred Holdings, Inc., Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 41.6	[4]	$ 37.9	[7]
Investment, Identifier [Axis]: Drilling Info Holdings, Inc. and Titan DI Preferred Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.63%	[2]	8.35%	[1]		12.63%	[2]	12.63%	[2]	12.63%	[2]	12.63%	[2]	8.35%	[1]	8.35%	[1]	8.35%	[1]
Total first lien senior secured loans		$ 25.0	[4]	$ 25.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		24.8	[4]	25.0
Investment, Identifier [Axis]: Dye & Durham Corporation
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		18.2		19.5
Less: funded commitments		(5.0)		0.0
Total unfunded commitments		13.2		19.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 13.2		$ 19.5
Investment, Identifier [Axis]: Dye & Durham Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.69%	[2]	6.50%	[1]		10.69%	[2]	10.69%	[2]	10.69%	[2]	10.69%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 40.0	[3],[4],[5]	$ 72.0	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 40.0	[3],[4],[5]	70.9	[6],[7],[8]
Investment, Identifier [Axis]: Dye & Durham Corporation, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.20%					11.20%		11.20%		11.20%		11.20%
Total first lien senior secured loans	[3],[4],[5]	$ 5.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	5.0
Investment, Identifier [Axis]: Dynamic NC Aerospace Holdings, LLC and Dynamic NC Investment Holdings, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.1		7.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		7.1		7.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.1		7.1
Investment, Identifier [Axis]: Dynamic NC Aerospace Holdings, LLC and Dynamic NC Investment Holdings, LP, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.0		$ 8.6
Investment, Identifier [Axis]: Dynamic NC Aerospace Holdings, LLC and Dynamic NC Investment Holdings, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.65%	[2]	7.50%	[1]		11.65%	[2]	11.65%	[2]	11.65%	[2]	11.65%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 23.2	[3],[4]	$ 25.7	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		23.2	[3],[4]	25.4	[6]
Investment, Identifier [Axis]: EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P., Partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.7	[4],[5]	$ 9.8	[7],[8]
Investment, Identifier [Axis]: EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	7.00%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 177.9	[3],[4]	$ 177.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		176.1	[3],[4]	176.1	[6],[7]
Investment, Identifier [Axis]: EP Wealth Advisors, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.1		2.8
Less: funded commitments		0.0		(0.2)
Total unfunded commitments		14.1		2.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 14.1		$ 2.6
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.50%											5.50%		5.50%		5.50%
Total first lien senior secured loans	[6],[7]			$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.2
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.01%					10.01%		10.01%		10.01%		10.01%
Total first lien senior secured loans	[3],[4]	$ 5.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 5.6
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 0.4	[3],[4]	$ 0.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.4	[3],[4]	$ 0.3	[6],[7]
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.11%					10.11%		10.11%		10.11%		10.11%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: EP Wealth Advisors, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.50%											5.50%		5.50%		5.50%
Total first lien senior secured loans	[6],[7]			$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.2
Investment, Identifier [Axis]: EPS NASS Parent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.5		6.6
Less: funded commitments		(0.8)		(0.9)
Total unfunded commitments		0.7		5.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.7		$ 5.7
Investment, Identifier [Axis]: EPS NASS Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 30.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.2	[3],[4]	$ 30.5	[6],[7]
Investment, Identifier [Axis]: EPS NASS Parent, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.8	[3],[4],[13]	$ 0.9	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.8	[3],[4],[13]	0.9	[6],[7],[14]
Investment, Identifier [Axis]: ESCP PPG Holdings, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		2.3		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(1.9)		(0.3)
Fair Value		3.1		2.8
Investment, Identifier [Axis]: ESCP PPG Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			2.8
Investment, Identifier [Axis]: ESCP PPG Holdings, LLC, Class A-1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	3.0
Investment, Identifier [Axis]: ESCP PPG Holdings, LLC, Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1
Investment, Identifier [Axis]: ESHA Research, LLC and RMCF VI CIV XLVIII, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.1
Less: funded commitments		0.0
Total unfunded commitments		1.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.1
Investment, Identifier [Axis]: ESHA Research, LLC and RMCF VI CIV XLVIII, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.07%					10.07%		10.07%		10.07%		10.07%
Total first lien senior secured loans	[3],[4]	$ 6.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	6.7
Investment, Identifier [Axis]: ESHA Research, LLC and RMCF VI CIV XLVIII, L.P., Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		6.0
Investment, Identifier [Axis]: Eagle Football Holdings BidCo Limited, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[5]	25.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 23.9
Investment, Identifier [Axis]: Eagle Football Holdings BidCo Limited, Senior subordinated loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.30%					12.30%		12.30%		12.30%		12.30%
Total first lien senior secured loans	[4],[5]	$ 41.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	40.5
Investment, Identifier [Axis]: Eckler Industries, Inc. and Eckler Purchaser LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		8.8		3.5
Redemptions (cost)		57.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		2.5
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		(57.0)		0.0
Net unrealized gains (losses):		25.1		(8.1)
Fair Value		0.0		23.1
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.9
Less: funded commitments				(6.7)
Total unfunded commitments				0.2
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				(0.2)
Total net adjusted unfunded revolving and delayed draw commitments				0.0
Investment, Identifier [Axis]: Eckler Industries, Inc. and Eckler Purchaser LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Eckler Industries, Inc. and Eckler Purchaser LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			26.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			18.4
Investment, Identifier [Axis]: Eckler Industries, Inc. and Eckler Purchaser LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			6.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			4.7
Investment, Identifier [Axis]: Eckler Purchaser LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc, Preferred equity
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	5.3
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.1		4.1
Less: funded commitments		(4.1)		(2.3)
Total unfunded commitments		0.0		1.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.0		$ 1.8
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 62.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 61.9
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.74%					10.74%		10.74%		10.74%		10.74%
Total first lien senior secured loans	[3]	$ 50.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 48.5
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.68%	[2]	6.50%	[1]		10.68%	[2]	10.68%	[2]	10.68%	[2]	10.68%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 11.3	[3],[4]	$ 20.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.0	[3],[4]	$ 20.5	[6],[7]
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.68%					10.68%		10.68%		10.68%		10.68%
Total first lien senior secured loans	[3],[4]	$ 5.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 5.6
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.51%	[2]	6.50%	[1]		10.51%	[2]	10.51%	[2]	10.51%	[2]	10.51%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 4.1	[3],[4]	$ 2.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.0	[3],[4]	2.3	[6],[7]
Investment, Identifier [Axis]: Elemica Parent, Inc. & EZ Elemica Holdings, Inc., Preferred equity
Investments Activity And Fair Value Table [Abstract]
Fair Value				5.5
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 14.2
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		17.1
Less: funded commitments		(1.5)
Total unfunded commitments		15.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 15.6
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 8.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 8.7
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.86%					10.86%		10.86%		10.86%		10.86%
Total first lien senior secured loans	[3],[4]	$ 10.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 10.0
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.47%	[2]	6.50%	[1]		9.47%	[2]	9.47%	[2]	9.47%	[2]	9.47%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 9.1	[3],[4]	$ 0.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.0	[3],[4]	$ 0.3	[6],[7]
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 5.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			5.2
Investment, Identifier [Axis]: Elevation Services Parent Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.36%					10.36%		10.36%		10.36%		10.36%
Total first lien senior secured loans	[3],[4],[13]	$ 1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	1.4
Investment, Identifier [Axis]: Emergency Communications Network, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.8		6.5
Less: funded commitments		(6.8)		0.0
Total unfunded commitments		0.0		6.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.0		$ 6.5
Investment, Identifier [Axis]: Emergency Communications Network, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		11.84%	[2]	8.75%	[1]		11.84%	[2]	11.84%	[2]	11.84%	[2]	11.84%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 48.4	[3],[4]	$ 46.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 43.6	[3],[4]	42.4	[6],[7]
Investment, Identifier [Axis]: Emergency Communications Network, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon	[2]	12.15%					12.15%		12.15%		12.15%		12.15%
Total first lien senior secured loans	[3],[4]	$ 6.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 6.1
Investment, Identifier [Axis]: Ensemble RCM, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.19%					9.19%		9.19%		9.19%		9.19%
Total first lien senior secured loans	[3]	$ 2.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	2.5
Investment, Identifier [Axis]: EpiServer Inc. and Episerver Sweden Holdings AB
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.5		14.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		14.5		14.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 14.5		$ 14.5
Investment, Identifier [Axis]: EpiServer Inc. and Episerver Sweden Holdings AB, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 4.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 4.6
Investment, Identifier [Axis]: EpiServer Inc. and Episerver Sweden Holdings AB, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	6.69%					6.69%		6.69%		6.69%		6.69%
Total first lien senior secured loans	[4]	$ 5.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 5.5
Investment, Identifier [Axis]: EpiServer Inc. and Episerver Sweden Holdings AB, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	5.75%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 6.0	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 6.0	[7]
Investment, Identifier [Axis]: EpiServer Inc. and Episerver Sweden Holdings AB, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.50%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	0.1	[6],[7]
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		28.0		53.3
Less: funded commitments		(6.2)		(1.0)
Total unfunded commitments		21.8		52.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		21.8		52.3
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 42.0	[4]	$ 34.4	[7]
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.49%					9.49%		9.49%		9.49%		9.49%
Total first lien senior secured loans	[3],[4]	$ 78.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 76.5
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 72.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 72.7
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.49%	[2]	6.75%	[1]		9.49%	[2]	9.49%	[2]	9.49%	[2]	9.49%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 48.2	[3],[4]	$ 80.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 47.2	[3],[4]	$ 80.4	[6],[7]
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.71%					9.71%		9.71%		9.71%		9.71%
Total first lien senior secured loans	[3],[4]	$ 19.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 19.2
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	14.94%					14.94%		14.94%		14.94%		14.94%
Total first lien senior secured loans	[3],[4]	$ 5.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	5.5
Investment, Identifier [Axis]: Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: European Capital UK SME Debt LP
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.8		7.7
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		2.0		0.4
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.4		4.9
Fair Value		26.5		26.9
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		54.3		60.9
Less: funded commitments		(49.1)		(55.1)
Total unfunded commitments		5.2		5.8
Less: commitments substantially at discretion of the Company		5.2		5.8
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Investment, Identifier [Axis]: European Capital UK SME Debt LP, Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.5	[5]	26.9	[8],[19]
Investment, Identifier [Axis]: Everspin Technologies, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 0.0
Investment, Identifier [Axis]: Everspin Technologies, Inc., Warrant to purchase up to 18,461 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0
Investment, Identifier [Axis]: Evolent Health LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4],[5]	$ 7.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 7.7
Investment, Identifier [Axis]: Excelligence Holdings Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.73%	[2]	7.00%	[1]		10.73%	[2]	10.73%	[2]	10.73%	[2]	10.73%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 9.2	[3],[4]	$ 9.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.2	[3],[4]	$ 9.3	[6],[7]
Investment, Identifier [Axis]: Explorer Investor, Inc
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.2
Less: funded commitments		0.0
Total unfunded commitments		0.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2
Investment, Identifier [Axis]: Explorer Investor, Inc, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.15%					10.15%		10.15%		10.15%		10.15%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.9
Investment, Identifier [Axis]: ExtraHop Networks, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 16.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 16.4
Investment, Identifier [Axis]: ExtraHop Networks, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			1.0
Investment, Identifier [Axis]: Extrahop Networks, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.9		8.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		5.9		8.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 5.9		8.5
Investment, Identifier [Axis]: Extrahop Networks, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.23%					12.23%		12.23%		12.23%		12.23%
Total first lien senior secured loans	[3],[4]	$ 20.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	20.2
Investment, Identifier [Axis]: FL Hawk Intermediate Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.5		0.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.5		0.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.5		0.5
Investment, Identifier [Axis]: FM:Systems Group, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.5		1.5
Less: funded commitments		0.0		(1.5)
Total unfunded commitments		1.5		0.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.5		$ 0.0
Investment, Identifier [Axis]: FM:Systems Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7]			$ 3.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 3.2
Investment, Identifier [Axis]: FM:Systems Group, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.13%					9.13%		9.13%		9.13%		9.13%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: FM:Systems Group, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.96%	[2]	7.50%	[1]		10.96%	[2]	10.96%	[2]	10.96%	[2]	10.96%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 1.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	$ 1.4	[6],[7]
Investment, Identifier [Axis]: FM:Systems Group, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7]			$ 1.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			1.5
Investment, Identifier [Axis]: FS Squared Holding Corp. and FS Squared, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.6		9.6
Less: funded commitments		(0.5)		(0.5)
Total unfunded commitments		9.1		9.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.1		9.1
Investment, Identifier [Axis]: FS Squared Holding Corp. and FS Squared, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 31.2	[4]	$ 19.2	[7]
Investment, Identifier [Axis]: FS Squared Holding Corp. and FS Squared, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.49%	[2]	5.36%	[1]		9.49%	[2]	9.49%	[2]	9.49%	[2]	9.49%	[2]	5.36%	[1]	5.36%	[1]	5.36%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	$ 0.1	[7]
Investment, Identifier [Axis]: FS Squared Holding Corp. and FS Squared, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: Faraday Buyer, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.7
Less: funded commitments		0.0
Total unfunded commitments		4.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.7
Investment, Identifier [Axis]: Faraday Buyer, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.32%					11.32%		11.32%		11.32%		11.32%
Total first lien senior secured loans	[3],[4]	$ 52.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	50.6
Investment, Identifier [Axis]: Faraday&Future Inc., FF Inc., Faraday SPE, LLC and Faraday Future Intelligent Electric Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			80.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			80.3
Investment, Identifier [Axis]: Faraday&Future Inc., FF Inc., Faraday SPE, LLC and Faraday Future Intelligent Electric Inc., Warrant to purchase shares of Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 1.2
Investment, Identifier [Axis]: Faraday&Future Inc., FF Inc., Faraday SPE, LLC and Faraday Future Intelligent Electric Inc., Warrant to purchase up to 633,008 shares of Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.0
Investment, Identifier [Axis]: Ferrellgas, L.P. and Ferrellgas Partners L.P., Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.9
Investment, Identifier [Axis]: Ferrellgas, L.P. and Ferrellgas Partners L.P., Senior preferred units
Schedule of Investments [Line Items]
Coupon | Rate	[2]	896.00%					896.00%		896.00%		896.00%		896.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 60.0
Investment, Identifier [Axis]: Ferrellgas, L.P., Senior preferred units
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.96%											8.96%		8.96%		8.96%
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 55.7
Investment, Identifier [Axis]: First Insight, Inc., Warrant to purchase units of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0	[7]
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.5		10.0
Less: funded commitments		(7.1)		(4.9)
Total unfunded commitments		7.4		5.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 7.4		$ 5.1
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	5.50%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 29.6	[3],[4]	$ 30.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 29.6	[3],[4]	$ 29.3	[6]
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	5.50%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 1.1	[3],[4]	$ 1.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.1	[3],[4]	$ 1.1	[6]
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	5.50%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 6.5	[3],[4],[13]	$ 4.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.5	[3],[4],[13]	4.8	[6],[7]
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.50%					11.50%		11.50%		11.50%		11.50%
Total first lien senior secured loans	[3],[4],[13]	$ 0.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	0.5
Investment, Identifier [Axis]: Flinn Scientific, Inc. and WCI-Quantum Holdings, Inc., Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.5	[4]	$ 1.1	[7]
Investment, Identifier [Axis]: Florida Food Products, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.32%	[2]	5.75%	[1]		9.32%	[2]	9.32%	[2]	9.32%	[2]	9.32%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 0.4	[3],[4]	$ 4.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.4	[3],[4]	$ 4.3	[6],[7]
Investment, Identifier [Axis]: Florida Food Products, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.38%					9.38%		9.38%		9.38%		9.38%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Florida Food Products, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.38%	[2]	8.75%	[1]		12.38%	[2]	12.38%	[2]	12.38%	[2]	12.38%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 71.8	[3],[4]	$ 71.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		70.4	[3],[4]	71.1	[6],[7]
Investment, Identifier [Axis]: Flow Control Solutions, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.0
Less: funded commitments				0.0
Total unfunded commitments				6.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 6.0
Investment, Identifier [Axis]: Flow Control Solutions, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 10.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			10.8
Investment, Identifier [Axis]: Forescout Technologies, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.2		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		14.2		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 14.2		0.1
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[6],[7]			18.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 18.5
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon	[2]	14.23%					14.23%		14.23%		14.23%		14.23%
Total first lien senior secured loans	[3],[4]	$ 23.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	23.8
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	12.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 12.6
Investment, Identifier [Axis]: Foundation Consumer Brands, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.15%	[2]	7.38%	[1]		10.15%	[2]	10.15%	[2]	10.15%	[2]	10.15%	[2]	7.38%	[1]	7.38%	[1]	7.38%	[1]
Total first lien senior secured loans		$ 12.8	[3],[4]	$ 24.9	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		12.8	[3],[4]	24.8	[6]
Investment, Identifier [Axis]: Foundation Risk Partners, Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		40.5		38.1
Less: funded commitments		(8.6)		0.0
Total unfunded commitments		31.9		38.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 31.9		$ 38.1
Investment, Identifier [Axis]: Foundation Risk Partners, Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.68%	[2]	6.50%	[1]		10.68%	[2]	10.68%	[2]	10.68%	[2]	10.68%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 112.6	[3],[4]	$ 169.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 111.5	[3],[4]	167.7	[6],[7]
Investment, Identifier [Axis]: Foundation Risk Partners, Corp., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.68%					10.68%		10.68%		10.68%		10.68%
Total first lien senior secured loans	[3],[4]	$ 30.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 30.0
Investment, Identifier [Axis]: Foundation Risk Partners, Corp., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.68%					10.68%		10.68%		10.68%		10.68%
Total first lien senior secured loans	[3],[4]	$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.1
Investment, Identifier [Axis]: Foundation Risk Partners, Corp., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.32%					10.32%		10.32%		10.32%		10.32%
Total first lien senior secured loans	[3]	$ 8.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	8.5
Investment, Identifier [Axis]: Frontline Technologies Group Holding LLC, Frontline Technologies Blocker Buyer, Inc., Frontline Technologies Holdings, LLC and Frontline Technologies Parent, LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value				6.7
Investment, Identifier [Axis]: Frontline Technologies Group Holding LLC, Frontline Technologies Blocker Buyer, Inc., Frontline Technologies Holdings, LLC and Frontline Technologies Parent, LLC, Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 7.9
Investment, Identifier [Axis]: Frontline Technologies Group Holding LLC, Frontline Technologies Blocker Buyer, Inc., Frontline Technologies Holdings, LLC and Frontline Technologies Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6]			$ 14.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 14.9
Investment, Identifier [Axis]: Frontline Technologies Group Holding LLC, Frontline Technologies Blocker Buyer, Inc., Frontline Technologies Holdings, LLC and Frontline Technologies Parent, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7]			$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.1
Investment, Identifier [Axis]: GF Parent LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: GF Parent LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: GF Parent LLC, Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		47.5		47.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		47.5		47.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		47.5		47.5
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 27.8	[4]	$ 32.2	[7]
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.50%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 114.0	[3],[4]	$ 114.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		111.8	[3],[4]	114.0	[6],[7]
Investment, Identifier [Axis]: GI Ranger Intermediate LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.2		9.0
Less: funded commitments		(0.4)		0.0
Total unfunded commitments		8.8		9.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.8		$ 9.0
Investment, Identifier [Axis]: GI Ranger Intermediate LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 35.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			34.8
Investment, Identifier [Axis]: GI Ranger Intermediate LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 10.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 10.0
Investment, Identifier [Axis]: GI Ranger Intermediate LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.7
Investment, Identifier [Axis]: GI Ranger Intermediate LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.4
Investment, Identifier [Axis]: GNZ Energy Bidco Limited and Galileo Co-investment Trust I
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.1
Less: funded commitments		0.0
Total unfunded commitments		3.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.1
Investment, Identifier [Axis]: GNZ Energy Bidco Limited and Galileo Co-investment Trust I, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 8.7
Investment, Identifier [Axis]: GNZ Energy Bidco Limited and Galileo Co-investment Trust I, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.65%					10.65%		10.65%		10.65%		10.65%
Total first lien senior secured loans	[3],[4],[5]	$ 30.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	30.8
Investment, Identifier [Axis]: GPM Investments, LLC and ARKO Corp., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.1		18.3
Investment, Identifier [Axis]: GPM Investments, LLC and ARKO Corp., Warrant to purchase common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			1.9
Investment, Identifier [Axis]: GPM Investments, LLC and ARKO Corp., Warrant to purchase units of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.9
Investment, Identifier [Axis]: GSV PracticeTek Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	14.0
Investment, Identifier [Axis]: Galway Borrower LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.8		23.3
Less: funded commitments		(0.4)		(0.4)
Total unfunded commitments		9.4		22.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 9.4		$ 22.9
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.00%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 34.2	[3],[4]	$ 59.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		32.8	[3],[4]	$ 58.5	[6],[7]
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: Garden Fresh Restaurant Corp. and GFRC Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				7.5
Less: funded commitments				(7.5)
Total unfunded commitments				0.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				0.0
Investment, Identifier [Axis]: Garden Fresh Restaurant Corp. and GFRC Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			21.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			0.0
Investment, Identifier [Axis]: Garden Fresh Restaurant Corp. and GFRC Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			7.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			0.0
Investment, Identifier [Axis]: Gehl Foods, LLC and GF Parent LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Gehl Foods, LLC and GF Parent LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Gehl Foods, LLC and GF Parent LLC, Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.5		1.5
Less: funded commitments		(1.5)		(1.5)
Total unfunded commitments		0.0		0.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.4	[4]	$ 0.9	[7]
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.25%											5.25%		5.25%		5.25%
Total first lien senior secured loans	[6],[7]			$ 9.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 9.0
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.92%					7.92%		7.92%		7.92%		7.92%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		8.42%	[2]	4.22%	[1]		8.42%	[2]	8.42%	[2]	8.42%	[2]	8.42%	[2]	4.22%	[1]	4.22%	[1]	4.22%	[1]
Total first lien senior secured loans		$ 0.1	[4]	$ 0.2	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[4]	$ 0.2	[7]
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		7.92%	[2]	4.22%	[1]		7.92%	[2]	7.92%	[2]	7.92%	[2]	7.92%	[2]	4.22%	[1]	4.22%	[1]	4.22%	[1]
Total first lien senior secured loans		$ 1.5	[4]	$ 1.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.5	[4]	$ 1.5	[7]
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.25%											8.25%		8.25%		8.25%
Total first lien senior secured loans	[6],[7]			$ 21.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 20.7
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., Second lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.24%					11.24%		11.24%		11.24%		11.24%
Total first lien senior secured loans	[4]	$ 32.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 31.7
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.24%	[2]	7.63%	[1]		11.24%	[2]	11.24%	[2]	11.24%	[2]	11.24%	[2]	7.63%	[1]	7.63%	[1]	7.63%	[1]
Total first lien senior secured loans		$ 21.1	[3],[4]	$ 32.4	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 20.7	[3],[4]	$ 31.4	[7]
Investment, Identifier [Axis]: Genesis Acquisition Co. and Genesis Ultimate Holding Co., Second lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		11.24%	[2]	7.70%	[1]		11.24%	[2]	11.24%	[2]	11.24%	[2]	11.24%	[2]	7.70%	[1]	7.70%	[1]	7.70%	[1]
Total first lien senior secured loans		$ 7.5	[4]	$ 7.5	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		7.4	[4]	7.3	[7]
Investment, Identifier [Axis]: Genomatica, Inc., Warrant to purchase 322,422 shares of Series D preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0
Investment, Identifier [Axis]: Genomatica, Inc., Warrant to purchase shares of Series D preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 0.0
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.63%					8.63%		8.63%		8.63%		8.63%
Total first lien senior secured loans	[3],[4],[11]	$ 12.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 8.5
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.42%					8.42%		8.42%		8.42%		8.42%
Total first lien senior secured loans	[3],[4],[11]	$ 25.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 17.9
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.10%	[2]	7.50%	[1]		11.10%	[2]	11.10%	[2]	11.10%	[2]	11.10%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 95.4	[3],[4]	$ 95.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		71.6	[3],[4]	94.5	[6],[7]
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., Warrant to purchase units of common stock 1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			3.0
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., Warrant to purchase units of common stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., Warrant to purchase up to 1,926.57 units of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.0
Investment, Identifier [Axis]: Global Medical Response, Inc. and GMR Buyer Corp., Warrant to purchase up to 115,733 units of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.8
Investment, Identifier [Axis]: Global Music Rights, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.3		4.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.3		4.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.3		$ 4.3
Investment, Identifier [Axis]: Global Music Rights, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.50%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 22.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	22.1	[6],[7]
Investment, Identifier [Axis]: Gotham Greens Holdings, PBC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		33.8
Less: funded commitments		0.0
Total unfunded commitments		33.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 33.8
Investment, Identifier [Axis]: Gotham Greens Holdings, PBC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.80%					11.80%		11.80%		11.80%		11.80%
Total first lien senior secured loans	[3],[4]	$ 17.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	17.4
Investment, Identifier [Axis]: Gotham Greens Holdings, PBC, Series E-1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	14.2
Investment, Identifier [Axis]: Gotham Greens Holdings, PBC, Warrant to purchase up to 43,154 shares of Series E-1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.0		5.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		5.0		5.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 5.0		5.0
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.43%					10.43%		10.43%		10.43%		10.43%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		57.5
Investment, Identifier [Axis]: GraphPAD Software, LLC, Insightful Science Intermediate I, LLC and Insightful Science Holdings, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4]	43.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	40.0
Investment, Identifier [Axis]: Green Street Parent, LLC and Green Street Intermediate Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				0.3
Less: funded commitments				0.0
Total unfunded commitments				0.3
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 0.3
Investment, Identifier [Axis]: Green Street Parent, LLC and Green Street Intermediate Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 23.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			23.7
Investment, Identifier [Axis]: H-Food Holdings, LLC and Matterhorn Parent, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.5		$ 6.8
Investment, Identifier [Axis]: H-Food Holdings, LLC and Matterhorn Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.07%	[2]	6.00%	[1]		8.07%	[2]	8.07%	[2]	8.07%	[2]	8.07%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 26.4	[4],[11]	$ 75.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 23.3	[4],[11]	$ 75.0	[6],[7]
Investment, Identifier [Axis]: H-Food Holdings, LLC and Matterhorn Parent, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.38%					8.38%		8.38%		8.38%		8.38%
Total first lien senior secured loans	[4],[11]	$ 3.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	$ 3.0
Investment, Identifier [Axis]: H-Food Holdings, LLC and Matterhorn Parent, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.38%					9.38%		9.38%		9.38%		9.38%
Total first lien senior secured loans	[3],[4],[11]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 0.1
Investment, Identifier [Axis]: H-Food Holdings, LLC and Matterhorn Parent, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.38%	[2]	7.10%	[1]		11.38%	[2]	11.38%	[2]	11.38%	[2]	11.38%	[2]	7.10%	[1]	7.10%	[1]	7.10%	[1]
Total first lien senior secured loans		$ 73.0	[4]	$ 73.0	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		62.8	[4]	73.0	[7]
Investment, Identifier [Axis]: HAI Acquisition Corporation and Aloha Topco, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		19.0		19.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		19.0		19.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		19.0		19.0
Investment, Identifier [Axis]: HAI Acquisition Corporation and Aloha Topco, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.1	[4]	$ 2.3	[7]
Investment, Identifier [Axis]: HAI Acquisition Corporation and Aloha Topco, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	6.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 60.5	[3],[4]	$ 61.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 60.5	[3],[4]	$ 61.0	[6]
Investment, Identifier [Axis]: HAI Acquisition Corporation and Aloha Topco, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.41%	[2]	6.00%	[1]		11.41%	[2]	11.41%	[2]	11.41%	[2]	11.41%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 7.8	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.8	[3],[4]	0.1	[6],[7]
Investment, Identifier [Axis]: HAI Acquisition Corporation and Aloha Topco, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.42%					10.42%		10.42%		10.42%		10.42%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: HCI Equity, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.0		(0.1)
Fair Value		0.0		0.0
Investment, Identifier [Axis]: HCI Equity, LLC, Member interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[5],[11]	0.0	[8],[12]
Investment, Identifier [Axis]: HGC Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.5
Less: funded commitments		0.0
Total unfunded commitments		7.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.5
Investment, Identifier [Axis]: HH-Stella, Inc. and Bedrock Parent Holdings, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.8		18.1
Less: funded commitments		(2.8)		(0.5)
Total unfunded commitments		12.0		17.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		12.0		17.6
Investment, Identifier [Axis]: HH-Stella, Inc. and Bedrock Parent Holdings, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.2	[4]	$ 2.9	[7]
Investment, Identifier [Axis]: HH-Stella, Inc. and Bedrock Parent Holdings, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.19%	[2]	6.50%	[1]		10.19%	[2]	10.19%	[2]	10.19%	[2]	10.19%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 5.8	[3],[4]	$ 2.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.7	[3],[4]	$ 2.6	[6],[7]
Investment, Identifier [Axis]: HH-Stella, Inc. and Bedrock Parent Holdings, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.94%	[2]	6.50%	[1]		9.94%	[2]	9.94%	[2]	9.94%	[2]	9.94%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 2.8	[3],[4]	$ 0.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.7	[3],[4]	0.5	[6],[7]
Investment, Identifier [Axis]: Halcon Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.8
Less: funded commitments				0.0
Total unfunded commitments				6.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 6.8
Investment, Identifier [Axis]: Halcon Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.20%	[2]	7.17%	[1]		12.20%	[2]	12.20%	[2]	12.20%	[2]	12.20%	[2]	7.17%	[1]	7.17%	[1]	7.17%	[1]
Total first lien senior secured loans		$ 13.4	[4]	$ 19.0	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		13.4	[4]	18.9	[7]
Investment, Identifier [Axis]: Halex Holdings, Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.0		0.0
Fair Value		0.0		0.0
Investment, Identifier [Axis]: Halex Holdings, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		0.0
Investment, Identifier [Axis]: Hanger, Inc, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.43%					10.43%		10.43%		10.43%		10.43%
Total first lien senior secured loans	[3],[4]	$ 54.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 53.2
Investment, Identifier [Axis]: Hanger, Inc, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.93%					13.93%		13.93%		13.93%		13.93%
Total first lien senior secured loans	[3],[4]	$ 110.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	106.8
Investment, Identifier [Axis]: Harvey Tool Company, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		28.5		29.5
Less: funded commitments		0.0		(5.9)
Total unfunded commitments		28.5		23.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 28.5		$ 23.6
Investment, Identifier [Axis]: Harvey Tool Company, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.64%	[2]	6.25%	[1]		10.64%	[2]	10.64%	[2]	10.64%	[2]	10.64%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 1.1	[3],[4]	$ 22.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.1	[3],[4]	$ 22.5	[6],[7]
Investment, Identifier [Axis]: Harvey Tool Company, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7],[14]			$ 5.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			5.8
Investment, Identifier [Axis]: HealthEdge Software, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		36.2		42.3
Less: funded commitments		(0.3)		(0.3)
Total unfunded commitments		35.9		42.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 35.9		$ 42.0
Investment, Identifier [Axis]: HealthEdge Software, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.74%	[2]	7.25%	[1]		11.74%	[2]	11.74%	[2]	11.74%	[2]	11.74%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 87.2	[3],[4]	$ 79.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		87.2	[3],[4]	$ 79.2	[6],[7]
Investment, Identifier [Axis]: HealthEdge Software, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.0		4.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.0		4.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.0		$ 4.0
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	6.50%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 40.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	40.5	[6],[7]
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				41.7
Redemptions (cost)				8.5
Sales (cost)				0.0
Interest income				1.5
Capital structuring service fees				0.7
Dividend income				0.4
Other income				0.0
Net realized gains (losses):				0.2
Net unrealized gains (losses):				9.3
Fair Value				69.4
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				51.0
Less: funded commitments				0.0
Total unfunded commitments				51.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				51.0
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC and Heelstone Renewable Energy Investors, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		95.4
Redemptions (cost)		0.0
Sales (cost)		0.0
Interest income		7.1
Capital structuring service fees		1.9
Dividend income		0.0
Other income		0.0
Net realized gains (losses):		0.0
Net unrealized gains (losses):		42.6
Fair Value		209.6
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC and Heelstone Renewable Energy Investors, LLC, Class A1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		124.0
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC and Heelstone Renewable Energy Investors, LLC, Class A2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.3
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC and Heelstone Renewable Energy Investors, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon	[2]	11.00%					11.00%		11.00%		11.00%		11.00%
Total first lien senior secured loans	[3],[4]	$ 79.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	79.3
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC, Class A1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 30.4
Investment, Identifier [Axis]: Heelstone Renewable Energy, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[6],[7]			$ 39.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			39.0
Investment, Identifier [Axis]: Help/Systems Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.5		7.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		7.5		7.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.5		7.5
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		25.5		8.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		25.5		8.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 25.5		$ 8.0
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.73%	[2]	6.75%	[1]		10.73%	[2]	10.73%	[2]	10.73%	[2]	10.73%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 22.8	[3],[4]	$ 55.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 22.6	[3],[4]	$ 54.5	[6],[7]
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.99%	[2]	6.75%	[1]		9.99%	[2]	9.99%	[2]	9.99%	[2]	9.99%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 14.7	[3],[4]	$ 10.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.4	[3],[4]	10.3	[6],[7]
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 12.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	12.1
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, Series A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		7.1	[4]	11.1	[7]
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, Series A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		112.9	[4]	101.2	[7]
Investment, Identifier [Axis]: High Street Buyer, Inc. and High Street Holdco LLC, Series C common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.6	[4]	11.9	[7]
Investment, Identifier [Axis]: HighTower Holding, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	675.00%					675.00%		675.00%		675.00%		675.00%
Total first lien senior secured loans	[4],[5]	$ 8.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	6.7
Investment, Identifier [Axis]: Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.5		9.5
Less: funded commitments		(1.1)		(5.9)
Total unfunded commitments		8.4		3.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.4		3.6
Investment, Identifier [Axis]: Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC, Co-invest units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.8	[4]	$ 3.5	[7]
Investment, Identifier [Axis]: Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.88%					8.88%		8.88%		8.88%		8.88%
Total first lien senior secured loans	[3],[4],[11]	$ 11.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 10.9
Investment, Identifier [Axis]: Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		8.13%	[2]	3.85%	[1]		8.13%	[2]	8.13%	[2]	8.13%	[2]	8.13%	[2]	3.85%	[1]	3.85%	[1]	3.85%	[1]
Total first lien senior secured loans		$ 1.0	[4],[13]	$ 5.9	[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.9	[4],[13]	$ 5.8	[7],[14]
Investment, Identifier [Axis]: Highline Aftermarket Acquisition, LLC, Highline Aftermarket SC Acquisition, Inc. and Highline PPC Blocker LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.72%	[2]	8.75%	[1]		12.72%	[2]	12.72%	[2]	12.72%	[2]	12.72%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 70.4	[3],[4]	$ 70.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		64.0	[3],[4]	66.1	[6],[7]
Investment, Identifier [Axis]: Hometown Food Company
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.9		3.9
Less: funded commitments		(0.8)		0.0
Total unfunded commitments		3.1		3.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.1		$ 3.9
Investment, Identifier [Axis]: Hometown Food Company, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.39%					9.39%		9.39%		9.39%		9.39%
Total first lien senior secured loans	[3],[4],[13]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	$ 0.8
Investment, Identifier [Axis]: Honor Technology, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		14.38%	[2]	11.00%	[1]		14.38%	[2]	14.38%	[2]	14.38%	[2]	14.38%	[2]	11.00%	[1]	11.00%	[1]	11.00%	[1]
Total first lien senior secured loans		$ 2.5	[3],[4]	$ 2.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.3	[3],[4]	2.5	[6],[7]
Investment, Identifier [Axis]: Honor Technology, Inc., Warrant to purchase shares of series D-2 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.1
Investment, Identifier [Axis]: Honor Technology, Inc., Warrant to purchase up to 133,333 units of series D-2 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.0
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC and GI Insurity TopCo LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		22.6		22.6
Less: funded commitments		(9.4)		(1.6)
Total unfunded commitments		13.2		21.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		13.2		$ 21.0
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC and GI Insurity TopCo LP, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 5.5
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC and GI Insurity TopCo LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 60.4	[3],[4]	$ 105.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 56.1	[3],[4]	$ 104.8	[6],[7]
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC and GI Insurity TopCo LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 9.4	[3],[4]	$ 1.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		8.7	[3],[4]	1.4	[6],[7]
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC and GI Insurity TopCo LP, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		99.5	[4]	90.2	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		82.6	[4]	88.8	[7]
Investment, Identifier [Axis]: Huskies Parent, Inc., GI Insurity Parent LLC, and GI Insurity Topco LP, Company units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			8.8
Investment, Identifier [Axis]: IQN Holding Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.8
Less: funded commitments		0.0
Total unfunded commitments		6.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.8
Investment, Identifier [Axis]: IQN Holding Corp., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.65%					9.65%		9.65%		9.65%		9.65%
Total first lien senior secured loans	[3],[4]	$ 23.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 23.3
Investment, Identifier [Axis]: IQN Holding Corp., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.71%					9.71%		9.71%		9.71%		9.71%
Total first lien senior secured loans	[3],[4]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.4
Investment, Identifier [Axis]: IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P., Class A-1 common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 26.1
Investment, Identifier [Axis]: IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			4.35%											4.35%		4.35%		4.35%
Total first lien senior secured loans				$ 42.3
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 42.3
Investment, Identifier [Axis]: IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.10%											8.10%		8.10%		8.10%
Total first lien senior secured loans	[7]			$ 86.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			86.8
Investment, Identifier [Axis]: IRI Holdings, Inc., IRI Group Holdings, Inc. and IRI Parent, L.P., Series A-1 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			66.0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, L.P, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 12.5
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.63%					10.63%		10.63%		10.63%		10.63%
Total first lien senior secured loans	[3],[4]	$ 3.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	3.5
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.8
Less: funded commitments		(0.2)
Total unfunded commitments		9.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.6
Investment, Identifier [Axis]: ITI Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.7
Less: funded commitments		(2.0)
Total unfunded commitments		3.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.7
Investment, Identifier [Axis]: ITI Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.08%					10.08%		10.08%		10.08%		10.08%
Total first lien senior secured loans	[3],[4]	$ 35.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 34.7
Investment, Identifier [Axis]: ITI Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.00%					12.00%		12.00%		12.00%		12.00%
Total first lien senior secured loans	[3],[4]	$ 3.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 2.9
Investment, Identifier [Axis]: ITI Holdings, Inc., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.88%					9.88%		9.88%		9.88%		9.88%
Total first lien senior secured loans	[3]	$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 1.1
Investment, Identifier [Axis]: ITI Holdings, Inc., First lien senior secured revolving loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.00%					12.00%		12.00%		12.00%		12.00%
Total first lien senior secured loans	[3],[4]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.8
Investment, Identifier [Axis]: IV Rollover Holdings, LLC, Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.1	[7]
Investment, Identifier [Axis]: IV Rollover Holdings, LLC, Class X units
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.1	[4]	2.2	[7]
Investment, Identifier [Axis]: IfByPhone Inc., Warrant to purchase shares of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C. and Scanner Holdings Corporation
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		3.9		0.0
Sales (cost)		0.0		0.0
Interest income		2.4		2.4
Capital structuring service fees		0.7		0.0
Dividend income		23.1		0.0
Other income		0.5		0.6
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(5.4)		8.4
Fair Value		47.8		53.0
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C. and Scanner Holdings Corporation, Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1		0.2
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C. and Scanner Holdings Corporation, Class B common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.3		$ 1.4
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C. and Scanner Holdings Corporation, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate		14.00%	[2]	14.00%	[1]		14.00%	[2]	14.00%	[2]	14.00%	[2]	14.00%	[2]	14.00%	[1]	14.00%	[1]	14.00%	[1]
Total first lien senior secured loans		$ 16.6	[4]	$ 16.6	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		16.6	[4]	16.6	[7]
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C. and Scanner Holdings Corporation, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 29.8		$ 34.8
Investment, Identifier [Axis]: Implus Footcare, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		13.98%	[2]	8.75%	[1]		13.98%	[2]	13.98%	[2]	13.98%	[2]	13.98%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 102.7	[3],[4]	$ 103.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 92.4	[3],[4]	$ 95.1	[6],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon		12.48%	[2]	8.75%	[1]		12.48%	[2]	12.48%	[2]	12.48%	[2]	12.48%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 14.1	[3],[4]	$ 14.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.6	[3],[4]	$ 13.0	[6],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon		12.48%	[2]	8.75%	[1]		12.48%	[2]	12.48%	[2]	12.48%	[2]	12.48%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 5.0	[3],[4]	$ 1.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.5	[3],[4]	$ 1.2	[6],[7]
Investment, Identifier [Axis]: Implus Footcare, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon		13.98%	[2]	8.75%	[1]		13.98%	[2]	13.98%	[2]	13.98%	[2]	13.98%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 1.3	[3],[4]	$ 5.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.1	[3],[4]	$ 4.6	[6],[7]
Investment, Identifier [Axis]: Imprivata, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.57%					10.57%		10.57%		10.57%		10.57%
Total first lien senior secured loans	[3],[4]	$ 16.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	15.1
Investment, Identifier [Axis]: Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		13.0
Less: funded commitments		0.0
Total unfunded commitments		13.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		13.0
Investment, Identifier [Axis]: Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 9.5
Investment, Identifier [Axis]: Infinity Home Services HoldCo, Inc. and IHS Parent Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.40%					11.40%		11.40%		11.40%		11.40%
Total first lien senior secured loans	[3],[4]	$ 11.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 11.1
Investment, Identifier [Axis]: Inmar, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.38%	[2]	9.00%	[1]		12.38%	[2]	12.38%	[2]	12.38%	[2]	12.38%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 28.3	[3],[4]	$ 28.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.6	[3],[4]	$ 28.3	[6],[7]
Investment, Identifier [Axis]: Insightful Science, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 0.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.5
Investment, Identifier [Axis]: Insightful Science, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 16.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 16.0
Investment, Identifier [Axis]: Insightful Science, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 7.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 7.9
Investment, Identifier [Axis]: Insightful Science, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 7.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			7.5
Investment, Identifier [Axis]: Insightful Science, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value				50.5
Investment, Identifier [Axis]: Insightful Science, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			39.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			38.8
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Common stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 0.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.50%											10.50%		10.50%		10.50%
Total first lien senior secured loans	[6],[7]			$ 4.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			4.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Senior preferred series A-1 shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			36.4
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Series B preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Series B preferred stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Instituto de Banca y Comercio, Inc. & Leeds IV Advisors, Inc., Series C preferred stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Inszone Mid, LLC and INSZ Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		17.2
Less: funded commitments		0.0
Total unfunded commitments		17.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 17.2
Investment, Identifier [Axis]: Inszone Mid, LLC and INSZ Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.33%					11.33%		11.33%		11.33%		11.33%
Total first lien senior secured loans	[3],[4]	$ 17.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	17.1
Investment, Identifier [Axis]: Inszone Mid, LLC and INSZ Holdings, LLC, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.7
Investment, Identifier [Axis]: IntraPac International LLC and IntraPac Canada Corporation
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				19.2
Less: funded commitments				(6.2)
Total unfunded commitments				13.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 13.0
Investment, Identifier [Axis]: IntraPac International LLC and IntraPac Canada Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[8]			$ 14.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[8]			$ 14.8
Investment, Identifier [Axis]: IntraPac International LLC and IntraPac Canada Corporation, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7],[8]			$ 10.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 10.8
Investment, Identifier [Axis]: IntraPac International LLC and IntraPac Canada Corporation, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7],[8]			$ 6.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			6.2
Investment, Identifier [Axis]: Ivy Hill Asset Management, L.P.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		1,544.2		347.5
Redemptions (cost)		277.6		70.5
Sales (cost)		0.0		37.0
Interest income		22.5		2.9
Capital structuring service fees		0.0		0.0
Dividend income		205.0		93.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(1.0)		67.3
Fair Value		2,201.1		935.8
Investment, Identifier [Axis]: Ivy Hill Asset Management, L.P., Member interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1,701.1	[5]	$ 919.8	[8]
Investment, Identifier [Axis]: Ivy Hill Asset Management, L.P., Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate		11.01%	[2]	7.25%	[1]		11.01%	[2]	11.01%	[2]	11.01%	[2]	11.01%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 500.0	[3],[5]	$ 16.0	[6],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		500.0	[3],[5]	16.0	[6],[8]
Investment, Identifier [Axis]: JDC Healthcare Management, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.8		4.4
Less: funded commitments		(4.8)		(4.4)
Total unfunded commitments		0.0		0.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Investment, Identifier [Axis]: JDC Healthcare Management, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		40.9	[4],[9]	37.2	[7],[10]
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.1	[4],[9]	26.5	[7],[10]
Investment, Identifier [Axis]: JDC Healthcare Management, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		4.8	[4],[9]	4.4	[7],[10]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.6	[4],[9]	3.1	[7],[10]
Investment, Identifier [Axis]: JWC/KI Holdings, LLC, Membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.0	[4]	7.7	[7]
Investment, Identifier [Axis]: Javlin Three LLC, Javlin Four LLC, and Javlin Five LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[8],[10]			15.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8],[10]			0.4
Investment, Identifier [Axis]: Jenny C Acquisition, Inc., Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		1.6	[4]	1.4	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.6	[4]	1.4	[7]
Investment, Identifier [Axis]: Jim N Nicks Management, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				4.8
Less: funded commitments				(2.8)
Total unfunded commitments				2.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 2.0
Investment, Identifier [Axis]: Jim N Nicks Management, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6]			$ 14.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 14.7
Investment, Identifier [Axis]: Jim N Nicks Management, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7]			$ 2.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			2.8
Investment, Identifier [Axis]: Johnnie-O Inc. and Johnnie-O Holdings Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon	[2]	10.65%					10.65%		10.65%		10.65%		10.65%
Total first lien senior secured loans	[3],[4]	$ 19.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	18.8
Investment, Identifier [Axis]: Johnnie-O Inc. and Johnnie-O Holdings Inc., Series A convertible preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	5.5
Investment, Identifier [Axis]: Johnnie-O Inc. and Johnnie-O Holdings Inc., Warrant to purchase up to 76,491 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.3
Investment, Identifier [Axis]: Joyce Lane Capital LLC and Joyce Lane Financing SPV LLC (fka Ciena Capital LLC)
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.3		0.3
Sales (cost)		0.0		0.0
Interest income		0.1		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.5		0.0
Net unrealized gains (losses):		0.1		0.0
Fair Value		0.0		0.3
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				1.4
Less: funded commitments				0.0
Total unfunded commitments				1.4
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				1.4
Investment, Identifier [Axis]: Joyce Lane Capital LLC and Joyce Lane Financing SPV LLC (fka Ciena Capital LLC), Equity interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 0.0
Investment, Identifier [Axis]: Joyce Lane Capital LLC and Joyce Lane Financing SPV LLC (fka Ciena Capital LLC), First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			4.13%											4.13%		4.13%		4.13%
Total first lien senior secured loans	[7],[8]			$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			0.3
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.1		10.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		9.1		10.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		9.1		10.9
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.3	[4]	$ 1.6	[7]
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.73%	[2]	6.00%	[1]		9.73%	[2]	9.73%	[2]	9.73%	[2]	9.73%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 50.4	[3],[4]	$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 50.4	[3],[4]	$ 0.6	[6],[7]
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.73%	[2]	6.00%	[1]		9.73%	[2]	9.73%	[2]	9.73%	[2]	9.73%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 2.3	[3],[4]	$ 51.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.3	[3],[4]	$ 51.0	[6]
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.54%	[2]	6.00%	[1]		9.54%	[2]	9.54%	[2]	9.54%	[2]	9.54%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 0.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3],[4]	$ 0.2	[6],[7]
Investment, Identifier [Axis]: K2 Insurance Services, LLC and K2 Holdco LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: KBHS Acquisition, LLC (d/b/a Alita Care, LLC)
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.0		5.0
Less: funded commitments		(3.2)		(0.8)
Total unfunded commitments		1.8		4.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.8		$ 4.2
Investment, Identifier [Axis]: KBHS Acquisition, LLC (d/b/a Alita Care, LLC), First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon	[2]	9.72%					9.72%		9.72%		9.72%		9.72%
Total first lien senior secured loans	[3],[4]	$ 3.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 3.1
Investment, Identifier [Axis]: KBHS Acquisition, LLC, (d/b/a/ Alita Care, LLC) First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[7]			$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.8
Investment, Identifier [Axis]: KC Culinarte Intermediate, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			4.75%											4.75%		4.75%		4.75%
Total first lien senior secured loans	[6]			$ 29.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 27.6
Investment, Identifier [Axis]: KC Culinarte Intermediate, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.75%											8.75%		8.75%		8.75%
Total first lien senior secured loans	[6],[7]			$ 35.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			32.0
Investment, Identifier [Axis]: KNPC HoldCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.92%					9.92%		9.92%		9.92%		9.92%
Total first lien senior secured loans	[3]	$ 5.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 5.5
Investment, Identifier [Axis]: KNPC HoldCo, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.42%					11.42%		11.42%		11.42%		11.42%
Total first lien senior secured loans	[3],[4]	$ 1.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.3
Investment, Identifier [Axis]: KPS Global LLC and Cool Group LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.2		$ 0.9
Investment, Identifier [Axis]: KPS Global LLC and Cool Group LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.92%	[2]	7.00%	[1]		9.92%	[2]	9.92%	[2]	9.92%	[2]	9.92%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 12.6	[3],[4]	$ 12.6	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.6	[3],[4]	$ 12.3	[6]
Investment, Identifier [Axis]: KPS Global LLC and Cool Group LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.92%	[2]	7.00%	[1]		9.92%	[2]	9.92%	[2]	9.92%	[2]	9.92%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 3.3	[3],[4]	$ 3.4	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.3	[3],[4]	3.3	[6]
Investment, Identifier [Axis]: Kaseya Inc. and Knockout Intermediate Holdings I Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		31.2
Less: funded commitments		0.0
Total unfunded commitments		31.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 31.2
Investment, Identifier [Axis]: Kaseya Inc. and Knockout Intermediate Holdings I Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.33%					10.33%		10.33%		10.33%		10.33%
Total first lien senior secured loans	[3],[4]	$ 167.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	162.0
Investment, Identifier [Axis]: Kaseya Inc. and Knockout Intermediate Holdings I Inc., Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 40.0
Investment, Identifier [Axis]: Kellermeyer Bergensons Services, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				23.0
Less: funded commitments				0.0
Total unfunded commitments				23.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 23.0
Investment, Identifier [Axis]: Kellermeyer Bergensons Services, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.41%	[2]	6.75%	[1]		10.41%	[2]	10.41%	[2]	10.41%	[2]	10.41%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 56.8	[3],[4]	$ 60.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 51.1	[3],[4]	$ 60.8	[6],[7]
Investment, Identifier [Axis]: Kellermeyer Bergensons Services, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.41%	[2]	6.75%	[1]		10.41%	[2]	10.41%	[2]	10.41%	[2]	10.41%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 21.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	21.1	[6],[7]
Investment, Identifier [Axis]: Kene Acquisition, Inc. and Kene Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.9		8.9
Less: funded commitments		(0.2)		(0.2)
Total unfunded commitments		8.7		8.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.7		8.7
Investment, Identifier [Axis]: Kene Acquisition, Inc. and Kene Holdings, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.0	[4]	$ 5.3	[7]
Investment, Identifier [Axis]: Kene Acquisition, Inc. and Kene Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.98%	[2]	5.25%	[1]		8.98%	[2]	8.98%	[2]	8.98%	[2]	8.98%	[2]	5.25%	[1]	5.25%	[1]	5.25%	[1]
Total first lien senior secured loans		$ 40.6	[3],[4]	$ 41.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		39.8	[3],[4]	$ 41.1	[6]
Investment, Identifier [Axis]: Kene Acquisition, Inc. and Kene Holdings, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: KeyStone Sub-debt HoldCo, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		60.0	[4]	54.3	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		58.8	[4]	52.7	[7]
Investment, Identifier [Axis]: KeyStone Sub-debt HoldCo, LLC, Senior subordinated loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans		8.0	[4]	7.2	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		7.8	[4]	7.0	[7]
Investment, Identifier [Axis]: KeyStone Sub-debt HoldCo, LLC, Warrant to purchase Class C interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			4.2
Investment, Identifier [Axis]: KeyStone Sub-debt HoldCo, LLC, Warrant to purchase up to 24.7581 Class C interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	8.3
Investment, Identifier [Axis]: LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.1
Less: funded commitments		0.0
Total unfunded commitments		10.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 10.1
Investment, Identifier [Axis]: LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans		$ 35.7
Investments Activity And Fair Value Table [Abstract]
Fair Value		34.6
Investment, Identifier [Axis]: LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P., Limited partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.7
Investment, Identifier [Axis]: LJP Purchaser, Inc. and LJP Topco, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.4
Less: funded commitments		0.0
Total unfunded commitments		4.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.4
Investment, Identifier [Axis]: LJP Purchaser, Inc. and LJP Topco, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 5.4
Investment, Identifier [Axis]: LJP Purchaser, Inc. and LJP Topco, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.44%					10.44%		10.44%		10.44%		10.44%
Total first lien senior secured loans	[3],[4]	$ 8.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	8.3
Investment, Identifier [Axis]: LS DE LLC and LM LSQ Investors LLC, Membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.0	[5]	$ 3.5	[8]
Investment, Identifier [Axis]: LS DE LLC and LM LSQ Investors LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.50%											10.50%		10.50%		10.50%
Total first lien senior secured loans	[7],[8]			$ 37.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 37.0
Investment, Identifier [Axis]: LS DE LLC and LM LSQ Investors LLC, Senior subordinated loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.50%					10.50%		10.50%		10.50%		10.50%
Total first lien senior secured loans	[4],[5]	$ 3.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 3.0
Investment, Identifier [Axis]: LS DE LLC and LM LSQ Investors LLC, Senior subordinated loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.50%	[2]	10.50%	[1]		10.50%	[2]	10.50%	[2]	10.50%	[2]	10.50%	[2]	10.50%	[1]	10.50%	[1]	10.50%	[1]
Total first lien senior secured loans		$ 37.0	[4],[5]	$ 3.0	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		36.6	[4],[5]	3.0	[7],[8]
Investment, Identifier [Axis]: LSP Holdco, LLC and ZBS Mechanical Group Co-Invest Fund 2, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.9		16.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.9		16.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.9		$ 16.2
Investment, Identifier [Axis]: LSP Holdco, LLC and ZBS Mechanical Group Co-Invest Fund 2, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.59%	[2]	7.00%	[1]		10.59%	[2]	10.59%	[2]	10.59%	[2]	10.59%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 21.2	[3],[4]	$ 6.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 21.6	[3],[4]	6.8	[6],[7]
Investment, Identifier [Axis]: LSP Holdco, LLC and ZBS Mechanical Group Co-Invest Fund 2, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.89%					10.89%		10.89%		10.89%		10.89%
Total first lien senior secured loans	[3],[4]	$ 6.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 6.8
Investment, Identifier [Axis]: LSP Holdco, LLC and ZBS Mechanical Group Co-Invest Fund 2, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.42%					10.42%		10.42%		10.42%		10.42%
Total first lien senior secured loans	[3],[4]	$ 6.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	6.2
Investment, Identifier [Axis]: LSP Holdco, LLC and ZBS Mechanical Group Co-Invest Fund 2, LLC, Membership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		15.5		2.8
Investment, Identifier [Axis]: LTG Acquisition, Inc., Class A membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		41.3		44.6
Less: funded commitments		(8.8)		0.0
Total unfunded commitments		32.5		44.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		32.5		44.6
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.5	[4]	$ 4.1	[7]
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6]			$ 21.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 21.6
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.98%					9.98%		9.98%		9.98%		9.98%
Total first lien senior secured loans	[3],[4]	$ 23.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 22.7
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		8.73%	[2]	6.75%	[1]		8.73%	[2]	8.73%	[2]	8.73%	[2]	8.73%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 16.7	[3]	$ 25.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 16.0	[3]	$ 25.5	[6]
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.55%	[2]	6.75%	[1]		9.55%	[2]	9.55%	[2]	9.55%	[2]	9.55%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 4.4	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.2	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		8.73%	[2]	6.75%	[1]		8.73%	[2]	8.73%	[2]	8.73%	[2]	8.73%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 10.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	10.7	[6],[7]
Investment, Identifier [Axis]: Laboratories Bidco LLC and Laboratories Topco LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.25%					12.25%		12.25%		12.25%		12.25%
Total first lien senior secured loans	[3],[4]	$ 8.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	8.4
Investment, Identifier [Axis]: Lakers Buyer, Inc. and Lakers Parent LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				11.1
Less: funded commitments				(3.6)
Total unfunded commitments				7.5
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				7.5
Investment, Identifier [Axis]: Lakers Buyer, Inc. and Lakers Parent LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			6.2
Investment, Identifier [Axis]: Lakers Buyer, Inc. and Lakers Parent LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[6],[7]			51.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 51.2
Investment, Identifier [Axis]: Lakers Buyer, Inc. and Lakers Parent LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 3.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			3.6
Investment, Identifier [Axis]: Lakers Buyer, Inc. and Lakers Parent LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[6],[7]			40.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			40.1
Investment, Identifier [Axis]: Largest Portfolio Company Investment | Senior Direct Lending Program
Schedule of Investments [Line Items]
Total first lien senior secured loans		377.0		$ 342.0
Investment, Identifier [Axis]: LeanTaaS Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		54.0
Less: funded commitments		0.0
Total unfunded commitments		54.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 54.0
Investment, Identifier [Axis]: LeanTaas Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.08%					12.08%		12.08%		12.08%		12.08%
Total first lien senior secured loans	[3],[4]	$ 31.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	31.2
Investment, Identifier [Axis]: Len the Plumber, LLC, LTP Neffsville, LLC, LTP of NJ, LLC, and LTP LSI, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 9.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			9.0
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC and Leviathan Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.5
Less: funded commitments		(0.7)
Total unfunded commitments		4.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.8
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC and Leviathan Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.54%					12.54%		12.54%		12.54%		12.54%
Total first lien senior secured loans	[3],[4]	$ 16.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 15.8
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC and Leviathan Holdings, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.54%					12.54%		12.54%		12.54%		12.54%
Total first lien senior secured loans	[3],[4]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.7
Investment, Identifier [Axis]: Leviathan Intermediate Holdco, LLC and Leviathan Holdings, L.P., Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.0
Investment, Identifier [Axis]: Lew's Intermediate Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3		2.3
Less: funded commitments		0.0		(1.8)
Total unfunded commitments		2.3		0.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.3		$ 0.5
Investment, Identifier [Axis]: Lew's Intermediate Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.40%	[2]	5.75%	[1]		9.40%	[2]	9.40%	[2]	9.40%	[2]	9.40%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 1.0	[4]	$ 1.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.9	[4]	$ 1.0	[6],[7]
Investment, Identifier [Axis]: Lew's Intermediate Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			4.14%											4.14%		4.14%		4.14%
Total first lien senior secured loans	[7]			$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			1.8
Investment, Identifier [Axis]: Lido Advisors, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.8		0.8
Less: funded commitments		(0.4)		0.0
Total unfunded commitments		0.4		0.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.4		$ 0.8
Investment, Identifier [Axis]: Lido Advisors, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.05%					9.05%		9.05%		9.05%		9.05%
Total first lien senior secured loans	[3]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	0.4
Investment, Identifier [Axis]: LifeStyles Bidco Ltd., Lifestyles Intermediate Holdco Ltd. and LifeStyles Parent, L.P., Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 0.0
Investment, Identifier [Axis]: LifeStyles Bidco Ltd., Lifestyles Intermediate Holdco Ltd. and LifeStyles Parent, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.15%					11.15%		11.15%		11.15%		11.15%
Total first lien senior secured loans	[3],[4],[5]	$ 18.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	18.2
Investment, Identifier [Axis]: LifeStyles Bidco Ltd., Lifestyles Intermediate Holdco Ltd. and LifeStyles Parent, L.P., Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 3.2
Investment, Identifier [Axis]: Lifescan Global Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.74%					9.74%		9.74%		9.74%		9.74%
Total first lien senior secured loans	[4]	$ 14.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 10.3
Investment, Identifier [Axis]: Lifescan Global Corporation, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.24%					13.24%		13.24%		13.24%		13.24%
Total first lien senior secured loans	[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.2
Investment, Identifier [Axis]: Lower ACS, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		25.9
Less: funded commitments		0.0
Total unfunded commitments		25.9
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 25.9
Investment, Identifier [Axis]: Lower ACS, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.13%					10.13%		10.13%		10.13%		10.13%
Total first lien senior secured loans	[3],[4]	$ 5.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 5.4
Investment, Identifier [Axis]: MB Aerospace Holdings II Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.23%	[2]	4.50%	[1]		8.23%	[2]	8.23%	[2]	8.23%	[2]	8.23%	[2]	4.50%	[1]	4.50%	[1]	4.50%	[1]
Total first lien senior secured loans		$ 14.3	[3],[4]	$ 11.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.5	[3],[4]	$ 10.9	[6],[7]
Investment, Identifier [Axis]: MB Aerospace Holdings II Corp., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.73%	[2]	10.00%	[1]		13.73%	[2]	13.73%	[2]	13.73%	[2]	13.73%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 68.4	[3],[4]	$ 68.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 63.6	[3],[4]	$ 61.6	[6],[7]
Investment, Identifier [Axis]: MB Aerospace Holdings II Corp., Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		13.73%	[2]	10.00%	[1]		13.73%	[2]	13.73%	[2]	13.73%	[2]	13.73%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 23.6	[3],[4]	$ 23.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.0	[3],[4]	21.3	[6],[7]
Investment, Identifier [Axis]: MCH Holdings, Inc., MC Acquisition Holdings I, LLC and Privia Health Group, Inc., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 0.6
Investment, Identifier [Axis]: MCH Holdings, Inc., MC Acquisition Holdings I, LLC and Privia Health Group, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 110.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			110.2
Investment, Identifier [Axis]: ME Equity LLC, Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.5	[4]	3.1	[7]
Investment, Identifier [Axis]: MMIT Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				4.6
Less: funded commitments				(0.6)
Total unfunded commitments				4.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 4.0
Investment, Identifier [Axis]: MMIT Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7]			$ 18.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 18.0
Investment, Identifier [Axis]: MMIT Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7]			$ 13.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 13.6
Investment, Identifier [Axis]: MMIT Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7]			$ 0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.6
Investment, Identifier [Axis]: MMax Investment Partners, Inc. (d/b/a Professional Fighters League) and PFL MMA, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			15.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			13.9
Investment, Identifier [Axis]: MMax Investment Partners, Inc. (d/b/a Professional Fighters League) and PFL MMA, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			1.9
Investment, Identifier [Axis]: MRI Software LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.6		10.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		10.6		10.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 10.6		$ 10.2
Investment, Identifier [Axis]: MRI Software LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 51.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 51.5
Investment, Identifier [Axis]: MRI Software LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3]	$ 47.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 45.6
Investment, Identifier [Axis]: MRI Software LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.50%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 17.4	[3],[4]	$ 4.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		16.8	[3],[4]	$ 4.5	[6],[7]
Investment, Identifier [Axis]: Mac Lean-Fogg Company and MacLean-Fogg Holdings, L.L.C., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.88%											5.88%		5.88%		5.88%
Total first lien senior secured loans	[6]			$ 123.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 123.8
Investment, Identifier [Axis]: Mac Lean-Fogg Company and MacLean-Fogg Holdings, L.L.C., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.88%											5.88%		5.88%		5.88%
Total first lien senior secured loans	[6],[7]			$ 19.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 19.1
Investment, Identifier [Axis]: Mac Lean-Fogg Company and MacLean-Fogg Holdings, L.L.C., Preferred units
Schedule of Investments [Line Items]
Coupon | Rate	[1]			13.75%											13.75%		13.75%		13.75%
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 75.0
Investment, Identifier [Axis]: MailSouth, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[9]	8.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[9]	3.9
Investment, Identifier [Axis]: Majesco and Magic Topco, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.0		2.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.0		2.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.0		2.0
Investment, Identifier [Axis]: Majesco and Magic Topco, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.6	[4]	4.0	[7]
Investment, Identifier [Axis]: Majesco and Magic Topco, L.P., Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		$ 0.0	[7]
Investment, Identifier [Axis]: Majesco and Magic Topco, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.98%	[2]	8.25%	[1]		11.98%	[2]	11.98%	[2]	11.98%	[2]	11.98%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 30.3	[3],[4]	$ 42.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		30.3	[3],[4]	42.2	[6],[7]
Investment, Identifier [Axis]: Management Consulting & Research LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.0
Less: funded commitments		0.0
Total unfunded commitments		4.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.0
Investment, Identifier [Axis]: Management Consulting & Research LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.94%					10.94%		10.94%		10.94%		10.94%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.0
Investment, Identifier [Axis]: Manna Pro Products, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.0		7.0
Less: funded commitments		(5.1)		(1.9)
Total unfunded commitments		1.9		5.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.9		$ 5.1
Investment, Identifier [Axis]: Manna Pro Products, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.14%	[2]	7.00%	[1]		10.14%	[2]	10.14%	[2]	10.14%	[2]	10.14%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 5.1	[3],[4]	$ 1.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.7	[3],[4]	1.9	[6],[7]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 10.2	[4]	$ 9.3	[7]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.98%	[2]	6.25%	[1]		10.98%	[2]	10.98%	[2]	10.98%	[2]	10.98%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 6.5	[3],[4]	$ 18.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.5	[3],[4]	$ 18.5	[6],[7]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.91%	[2]	6.25%	[1]		10.91%	[2]	10.91%	[2]	10.91%	[2]	10.91%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 2.6	[3],[4]	$ 2.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.5	[3],[4]	$ 2.1	[6]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.94%	[2]	6.00%	[1]		10.94%	[2]	10.94%	[2]	10.94%	[2]	10.94%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 2.1	[3],[4]	$ 6.6	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.1	[3],[4]	$ 6.5	[6]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		10.98%	[2]	6.25%	[1]		10.98%	[2]	10.98%	[2]	10.98%	[2]	10.98%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 0.3	[3],[4]	$ 35.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.3	[3],[4]	$ 34.6	[6],[7]
Investment, Identifier [Axis]: Marmic Purchaser, LLC and Marmic Topco, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.9
Less: funded commitments		0.0
Total unfunded commitments		6.9
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.9
Investment, Identifier [Axis]: Marmic Purchaser, LLC and Marmic Topco, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 34.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			34.4
Investment, Identifier [Axis]: Marmic Purchaser, LLC and Marmic Topco, L.P., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.80%					10.80%		10.80%		10.80%		10.80%
Total first lien senior secured loans	[3],[4]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.7
Investment, Identifier [Axis]: Marmic Purchaser, LLC and Marmic Topco, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.04%					11.04%		11.04%		11.04%		11.04%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.2
Investment, Identifier [Axis]: Marmic Purchaser, LLC and Marmic Topco, L.P., Limited partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.6	[4]	2.4	[7]
Investment, Identifier [Axis]: Maverick Acquisition, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				17.2
Less: funded commitments				0.0
Total unfunded commitments				17.2
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 17.2
Investment, Identifier [Axis]: Maverick Acquisition, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.98%	[2]	7.00%	[1]		10.98%	[2]	10.98%	[2]	10.98%	[2]	10.98%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 27.6	[3],[4]	$ 57.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		25.4	[3],[4]	57.3	[6],[7]
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP, Class A-1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 26.8
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			3.85%											3.85%		3.85%		3.85%
Total first lien senior secured loans	[7],[14]			$ 15.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[14]			15.3
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			71.8
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis Holdco, Inc. and Metis Topco, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		32.9		32.9
Less: funded commitments		(7.3)		(23.4)
Total unfunded commitments		25.6		9.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		25.6		9.5
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis Holdco, Inc. and Metis Topco, LP, Class A-1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	33.1
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis Holdco, Inc. and Metis Topco, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	0.0
Investment, Identifier [Axis]: Mavis Tire Express Services Topco Corp., Metis Holdco, Inc. and Metis Topco, LP, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	76.6
Investment, Identifier [Axis]: McKenzie Creative Brands, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.5		4.5
Less: funded commitments		(1.9)		0.0
Total unfunded commitments		2.6		4.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.6		$ 4.5
Investment, Identifier [Axis]: McKenzie Creative Brands, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.43%	[2]	6.75%	[1]		9.43%	[2]	9.43%	[2]	9.43%	[2]	9.43%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 84.5	[3],[4],[20]	$ 84.5	[6],[21]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 84.5	[3],[4],[20]	$ 84.5	[6],[21]
Investment, Identifier [Axis]: McKenzie Creative Brands, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.14%	[2]	6.75%	[1]		10.14%	[2]	10.14%	[2]	10.14%	[2]	10.14%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 5.5	[3],[4]	$ 5.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.5	[3],[4]	$ 5.5	[6]
Investment, Identifier [Axis]: McKenzie Creative Brands, LLC, First lien senior secured loan, First Out Tranche
Schedule of Investments [Line Items]
Coupon		2.00%		2.00%			2.00%		2.00%		2.00%		2.00%		2.00%		2.00%		2.00%
Total first lien senior secured loans		$ 40.9		$ 46.9
Investment, Identifier [Axis]: McKenzie Creative Brands, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.12%					10.12%		10.12%		10.12%		10.12%
Total first lien senior secured loans	[3],[4]	$ 1.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.9
Investment, Identifier [Axis]: McLaren Group Limited, Senior preference shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		26.2	[4],[5]	27.1	[7],[8]
Investment, Identifier [Axis]: McLaren Group Limited, Warrant to purchase ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			5.1
Investment, Identifier [Axis]: McLaren Group Limited, Warrant to purchase ordinary shares 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			1.4
Investment, Identifier [Axis]: McLaren Group Limited, Warrant to purchase up to 13,776 units of ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	0.8
Investment, Identifier [Axis]: McLaren Group Limited, Warrant to purchase up to 49,181 units of ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	2.8
Investment, Identifier [Axis]: Medline Borrower, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.9		6.9
Less: funded commitments		(0.2)		0.0
Total unfunded commitments		6.7		6.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		6.7		6.9
Investment, Identifier [Axis]: Medline Borrower, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	0.0
Investment, Identifier [Axis]: Miami Beckham United LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		94.7		87.1
Investment, Identifier [Axis]: Micromeritics Instrument Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.1		4.1
Less: funded commitments		0.0		(0.1)
Total unfunded commitments		4.1		4.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.1		$ 4.0
Investment, Identifier [Axis]: Micromeritics Instrument Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.65%	[2]	6.00%	[1]		9.65%	[2]	9.65%	[2]	9.65%	[2]	9.65%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 20.7	[3],[4]	$ 32.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		20.7	[3],[4]	$ 32.0	[6]
Investment, Identifier [Axis]: Micromeritics Instrument Corp., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.6	[4]	4.5	[7]
Investment, Identifier [Axis]: Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon	[2]	15.58%					15.58%		15.58%		15.58%		15.58%
Total first lien senior secured loans		$ 159.3	[3]	153.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		159.3	[3]	150.4	[6]
Investment, Identifier [Axis]: Microstar Logistics LLC, Microstar Global Asset Management LLC, MStar Holding Corporation and Kegstar USA Inc., Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.6	[4]	2.0	[7]
Investment, Identifier [Axis]: Mimecast Borrowerco, Inc. and Magnesium Co- Invest SCSp
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.1
Less: funded commitments		0.0
Total unfunded commitments		15.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 15.1
Investment, Identifier [Axis]: Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.17%					10.17%		10.17%		10.17%		10.17%
Total first lien senior secured loans	[3],[4],[5]	$ 102.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 99.1
Investment, Identifier [Axis]: Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.18%					9.18%		9.18%		9.18%		9.18%
Total first lien senior secured loans	[3],[4],[5]	$ 34.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	33.7
Investment, Identifier [Axis]: Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp, Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	39.4
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC and RCP MB Investments B, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		31.3		31.3
Less: funded commitments		(4.0)		0.0
Total unfunded commitments		27.3		31.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 27.3		$ 31.3
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC and RCP MB Investments B, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	6.25%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 32.5	[3],[4]	$ 72.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 30.9	[3],[4]	72.0	[6],[7]
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC and RCP MB Investments B, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.88%					9.88%		9.88%		9.88%		9.88%
Total first lien senior secured loans	[3],[4]	$ 4.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	3.8
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC and RCP MB Investments B, L.P., Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.8	[4]	9.6	[7]
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands)
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				10.9
Less: funded commitments				(5.0)
Total unfunded commitments				5.9
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				5.9
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 7.2
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.00%											5.00%		5.00%		5.00%
Total first lien senior secured loans	[6]			$ 9.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 9.2
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.00%											5.00%		5.00%		5.00%
Total first lien senior secured loans	[6]			$ 4.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 4.7
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6]			$ 5.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 5.0
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.25%											10.25%		10.25%		10.25%
Total first lien senior secured loans	[6]			$ 106.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 106.6
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.25%											10.25%		10.25%		10.25%
Total first lien senior secured loans	[6],[7]			$ 13.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 13.9
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), Second lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.25%											10.25%		10.25%		10.25%
Total first lien senior secured loans	[6],[7]			$ 17.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 17.9
Investment, Identifier [Axis]: Ministry Brands, LLC and MB Parent HoldCo, L.P. (dba Community Brands), Second lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.00%											9.00%		9.00%		9.00%
Total first lien senior secured loans	[6],[7]			$ 48.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 48.9
Investment, Identifier [Axis]: Mitchell International, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	7.00%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 98.1	[3],[4],[11]	$ 91.2	[6],[7],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		81.0	[3],[4],[11]	91.6	[6],[7],[12]
Investment, Identifier [Axis]: Monica Holdco (US) Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.6		3.6
Less: funded commitments		(2.4)		0.0
Total unfunded commitments		1.2		3.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.2		$ 3.6
Investment, Identifier [Axis]: Monica Holdco (US) Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.25%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 2.6	[3],[4]	$ 2.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.5	[3],[4]	$ 2.6	[6],[7]
Investment, Identifier [Axis]: Monica Holdco (US) Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.99%	[2]	0.00%	[1]		10.99%	[2]	10.99%	[2]	10.99%	[2]	10.99%	[2]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Total first lien senior secured loans	[3],[4]	$ 2.4
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.3	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: Monolith Brands Group, Inc., Series A-1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	15.5
Investment, Identifier [Axis]: Moon Valley Nursery of Arizona Retail, LLC, Moon Valley Nursery Farm Holdings, LLC, Moon Valley Nursery RE Holdings LLC, and Stonecourt IV Partners, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				15.2
Less: funded commitments				0.0
Total unfunded commitments				15.2
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 15.2
Investment, Identifier [Axis]: Moon Valley Nursery of Arizona Retail, LLC, Moon Valley Nursery Farm Holdings, LLC, Moon Valley Nursery RE Holdings LLC, and Stonecourt IV Partners, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6]			$ 79.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			78.2
Investment, Identifier [Axis]: Moon Valley Nursery of Arizona Retail, LLC, Moon Valley Nursery Farm Holdings, LLC, Moon Valley Nursery RE Holdings LLC, and Stonecourt IV Partners, LP, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		42.9	[3],[4]	$ 96.9
Investment, Identifier [Axis]: Moonraker AcquisitionCo LLC and Moonraker HoldCo LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		19.0
Less: funded commitments		0.0
Total unfunded commitments		19.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		19.0
Investment, Identifier [Axis]: Moonraker AcquisitionCo LLC and Moonraker HoldCo LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.5
Investment, Identifier [Axis]: Moonraker AcquisitionCo LLC and Moonraker HoldCo LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.32%					10.32%		10.32%		10.32%		10.32%
Total first lien senior secured loans	[3],[4]	$ 25.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 24.6
Investment, Identifier [Axis]: Movati Athletic (Group) Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		10.18%	[2]	7.45%	[1]		10.18%	[2]	10.18%	[2]	10.18%	[2]	10.18%	[2]	7.45%	[1]	7.45%	[1]	7.45%	[1]
Total first lien senior secured loans		$ 4.7	[3],[4],[5]	$ 0.2	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.6	[3],[4],[5]	$ 0.2	[6],[7],[8]
Investment, Identifier [Axis]: Movati Athletic (Group) Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7],[8]			$ 2.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 2.7
Investment, Identifier [Axis]: Movati Athletic (Group) Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[8]			$ 2.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[8]			$ 2.1
Investment, Identifier [Axis]: Murchison Oil and Gas, LLC and Murchison Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		27.5
Less: funded commitments		0.0
Total unfunded commitments		27.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 27.5
Investment, Identifier [Axis]: Murchison Oil and Gas, LLC and Murchison Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.08%	[2]	11.00%	[1]		13.08%	[2]	13.08%	[2]	13.08%	[2]	13.08%	[2]	11.00%	[1]	11.00%	[1]	11.00%	[1]
Total first lien senior secured loans		$ 75.5	[3],[4]	$ 2.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		75.5	[3],[4]	$ 2.7	[6],[7]
Investment, Identifier [Axis]: Murchison Oil and Gas, LLC and Murchison Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.00%											10.00%		10.00%		10.00%
Total first lien senior secured loans	[6],[7]			$ 38.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 38.3
Investment, Identifier [Axis]: Murchison Oil and Gas, LLC and Murchison Holdings, LLC, Preferred units
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value		45.9		$ 27.4
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.0		3.0
Less: funded commitments		(0.6)		(0.6)
Total unfunded commitments		2.4		2.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.4		$ 2.4
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.50%											7.50%		7.50%		7.50%
Total first lien senior secured loans	[6],[7]			$ 2.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 2.4
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.23%					11.23%		11.23%		11.23%		11.23%
Total first lien senior secured loans	[3],[4]	$ 6.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 6.3
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	7.00%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 2.3	[3],[4]	$ 6.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.3	[3],[4]	$ 6.4	[6],[7]
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.23%					11.23%		11.23%		11.23%		11.23%
Total first lien senior secured loans	[3],[4]	$ 1.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 1.3
Investment, Identifier [Axis]: NAS, LLC and Nationwide Marketing Group, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	8.75%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 0.6	[3],[4]	$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.6	[3],[4]	0.6	[6],[7]
Investment, Identifier [Axis]: NCWS Intermediate, Inc. and NCWS Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		28.1		28.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		28.1		28.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		28.1		28.3
Investment, Identifier [Axis]: NCWS Intermediate, Inc. and NCWS Holdings LP, Class A-2 common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 18.5	[4]	$ 18.5	[7]
Investment, Identifier [Axis]: NCWS Intermediate, Inc. and NCWS Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	6.75%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 97.0	[3],[4]	$ 12.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 95.1	[3],[4]	$ 12.0	[6],[7]
Investment, Identifier [Axis]: NCWS Intermediate, Inc. and NCWS Holdings LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	6.75%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 176.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3],[4]	174.7	[6],[7]
Investment, Identifier [Axis]: NECCO Holdings, Inc. and New England Confectionery Company, Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				1.9
Redemptions (cost)				14.5
Sales (cost)				0.0
Interest income				0.0
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				(12.4)
Net unrealized gains (losses):				8.0
Fair Value				0.0
Investment, Identifier [Axis]: NECCO Realty Investments LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				0.0
Sales (cost)				0.0
Interest income				0.0
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				0.0
Net unrealized gains (losses):				0.0
Fair Value				$ 0.0
Investment, Identifier [Axis]: NM GRC Holdco, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 45.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			45.4
Investment, Identifier [Axis]: NMC Skincare Intermediate Holdings II, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.7		9.1
Less: funded commitments		0.0		(6.2)
Total unfunded commitments		12.7		2.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 12.7		$ 2.9
Investment, Identifier [Axis]: NMC Skincare Intermediate Holdings II, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.38%	[2]	6.00%	[1]		9.38%	[2]	9.38%	[2]	9.38%	[2]	9.38%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 32.0	[3],[4]	$ 24.2	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 30.7	[3],[4]	$ 23.9	[6]
Investment, Identifier [Axis]: NMC Skincare Intermediate Holdings II, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.38%	[2]	6.00%	[1]		9.38%	[2]	9.38%	[2]	9.38%	[2]	9.38%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 4.7	[3],[4]	$ 8.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.5	[3],[4]	$ 8.1	[6]
Investment, Identifier [Axis]: NMC Skincare Intermediate Holdings II, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[7]			$ 6.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			6.1
Investment, Identifier [Axis]: NMN Holdings III Corp. and NMN Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.5		12.5
Less: funded commitments		(3.1)		(1.1)
Total unfunded commitments		9.4		11.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 9.4		$ 11.4
Investment, Identifier [Axis]: NMN Holdings III Corp. and NMN Holdings LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		8.13%	[2]	0.00%	[1]		8.13%	[2]	8.13%	[2]	8.13%	[2]	8.13%	[2]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Total first lien senior secured loans	[4],[13]	$ 2.3
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.1	[4],[13]	$ 0.0	[16]
Investment, Identifier [Axis]: NMN Holdings III Corp. and NMN Holdings LP, Partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.0	[4]	2.8	[7]
Investment, Identifier [Axis]: NSM Insurance Group, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.0
Less: funded commitments				(0.7)
Total unfunded commitments				5.3
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 5.3
Investment, Identifier [Axis]: NSM Insurance Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6]			$ 12.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 12.8
Investment, Identifier [Axis]: NSM Insurance Group, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7],[14]			$ 0.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			0.5
Investment, Identifier [Axis]: Napa Management Services Corporation and ASP NAPA Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.6	[4]	4.1	[7]
Investment, Identifier [Axis]: Napa Management Services Corporation and ASP NAPA Holdings, LLC, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[4]	$ 0.1	[7]
Investment, Identifier [Axis]: Napa Management Services Corporation and ASP NAPA Holdings, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			11.00%											11.00%		11.00%		11.00%
Total first lien senior secured loans	[6],[7]			$ 72.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			72.8
Investment, Identifier [Axis]: Napa Management Services Corporation and ASP NAPA Holdings, LLC, Senior preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.3	[4]	0.3	[7]
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Common stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Senior preferred series A-1 shares
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	46.5
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Series B preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Series B preferred stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National College of Business and Technology Inc. & Leeds IV Advisors, Inc., Series C preferred stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: National Intergovernmental Purchasing Alliance Company
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.0		9.0
Less: funded commitments		(1.2)		0.0
Total unfunded commitments		7.8		9.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 7.8		9.0
Investment, Identifier [Axis]: National Intergovernmental Purchasing Alliance Company, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.12%					7.12%		7.12%		7.12%		7.12%
Total first lien senior secured loans	[4]	$ 1.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.2
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		6.6
Redemptions (cost)		131.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.4		8.9
Capital structuring service fees		0.0		0.1
Dividend income		0.1		0.4
Other income		0.0		0.1
Net realized gains (losses):		19.0		0.0
Net unrealized gains (losses):		(9.4)		12.6
Fair Value		0.0		143.7
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value				11.8
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			54.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			54.4
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7]			15.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 15.2
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.00%											8.00%		8.00%		8.00%
Total first lien senior secured loans	[7]			$ 46.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			46.5
Investment, Identifier [Axis]: Navisun LLC and Navisun Holdings LLC, Series A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value				15.8
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.6		0.6
Less: funded commitments		(0.1)		(0.2)
Total unfunded commitments		0.5		0.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.5		0.4
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 7.5
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			$ 7.1
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.66%	[2]	5.25%	[1]		8.66%	[2]	8.66%	[2]	8.66%	[2]	8.66%	[2]	5.25%	[1]	5.25%	[1]	5.25%	[1]
Total first lien senior secured loans		$ 14.9	[3],[4],[5]	$ 15.0	[6],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.6	[3],[4],[5]	$ 15.0	[6],[8]
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		6.11%	[2]	4.50%	[1]		6.11%	[2]	6.11%	[2]	6.11%	[2]	6.11%	[2]	4.50%	[1]	4.50%	[1]	4.50%	[1]
Total first lien senior secured loans		$ 4.8	[4],[5]	$ 5.2	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.7	[4],[5]	$ 5.2	[7],[8]
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		6.11%	[2]	4.50%	[1]		6.11%	[2]	6.11%	[2]	6.11%	[2]	6.11%	[2]	4.50%	[1]	4.50%	[1]	4.50%	[1]
Total first lien senior secured loans		$ 1.5	[4],[5]	$ 24.4	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.5	[4],[5]	$ 24.4	[7],[8]
Investment, Identifier [Axis]: Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		8.66%	[2]	5.25%	[1]		8.66%	[2]	8.66%	[2]	8.66%	[2]	8.66%	[2]	5.25%	[1]	5.25%	[1]	5.25%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4],[5]	$ 0.2	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4],[5]	0.2	[6],[7],[8]
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.6
Less: funded commitments		0.0
Total unfunded commitments		12.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 12.6
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.82%					8.82%		8.82%		8.82%		8.82%
Total first lien senior secured loans	[3],[4]	$ 99.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 88.4
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.57%					8.57%		8.57%		8.57%		8.57%
Total first lien senior secured loans	[3],[4]	$ 74.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 65.9
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	6.25%					6.25%		6.25%		6.25%		6.25%
Total first lien senior secured loans	[4]	$ 16.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 14.4
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., First lien senior secured notes
Schedule of Investments [Line Items]
Coupon | Rate	[2]	929.00%					929.00%		929.00%		929.00%		929.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	$ 49.8
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 4.0
Investment, Identifier [Axis]: Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.57%					13.57%		13.57%		13.57%		13.57%
Total first lien senior secured loans	[3],[4]	$ 221.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	214.7
Investment, Identifier [Axis]: Nest Topco Borrower Inc., KKR Nest Co-Invest L.P., and NBLY 2021-1
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		119.1		119.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		119.1		119.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		119.1		119.1
Investment, Identifier [Axis]: Nest Topco Borrower Inc., KKR Nest Co-Invest L.P., and NBLY 2021-1, Limited partner interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 10.2	[4]	$ 9.7	[7]
Investment, Identifier [Axis]: Nest Topco Borrower Inc., KKR Nest Co-Invest L.P., and NBLY 2021-1, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate		13.26%	[2]	9.00%	[1]		13.26%	[2]	13.26%	[2]	13.26%	[2]	13.26%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 119.1	[3],[4]	$ 119.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 117.9	[3],[4]	117.9	[6],[7]
Investment, Identifier [Axis]: New Era Cap, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.94%					9.94%		9.94%		9.94%		9.94%
Total first lien senior secured loans	[3],[4]	$ 27.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	27.8
Investment, Identifier [Axis]: Noble Aerospace, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.6
Less: funded commitments		(2.2)
Total unfunded commitments		3.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.4
Investment, Identifier [Axis]: Noble Aerospace, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	0.0
Investment, Identifier [Axis]: North American Fire Holdings, LLC and North American Fire Ultimate Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.1		23.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		8.1		23.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.1		23.9
Investment, Identifier [Axis]: North American Fire Holdings, LLC and North American Fire Ultimate Holdings, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.9	[4]	$ 1.2	[7]
Investment, Identifier [Axis]: North American Fire Holdings, LLC and North American Fire Ultimate Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 20.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			20.1
Investment, Identifier [Axis]: North American Fire Holdings, LLC and North American Fire Ultimate Holdings, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4]	$ 20.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 20.0
Investment, Identifier [Axis]: North American Fire Holdings, LLC and North American Fire Ultimate Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.08%					10.08%		10.08%		10.08%		10.08%
Total first lien senior secured loans	[3],[4]	$ 2.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	2.9
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.0
Less: funded commitments				0.0
Total unfunded commitments				6.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				6.0
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P., Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 38.8	[4]	$ 32.8	[7]
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.18%	[2]	6.50%	[1]		10.18%	[2]	10.18%	[2]	10.18%	[2]	10.18%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 47.5	[3],[4]	$ 48.0	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 47.5	[3],[4]	$ 48.0	[6]
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.18%	[2]	6.50%	[1]		10.18%	[2]	10.18%	[2]	10.18%	[2]	10.18%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 2.6	[3],[4]	$ 2.6	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.6	[3],[4]	$ 2.6	[6]
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.18%	[2]	6.50%	[1]		10.18%	[2]	10.18%	[2]	10.18%	[2]	10.18%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	0.1	[6],[7]
Investment, Identifier [Axis]: North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.18%					10.18%		10.18%		10.18%		10.18%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: North Haven Fairway Buyer, LLC, Fairway Lawns, LLC and Command Pest Control, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		22.5
Less: funded commitments		0.0
Total unfunded commitments		22.5
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 22.5
Investment, Identifier [Axis]: North Haven Fairway Buyer, LLC, Fairway Lawns, LLC and Command Pest Control, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.05%					11.05%		11.05%		11.05%		11.05%
Total first lien senior secured loans	[3],[4]	$ 6.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	6.2
Investment, Identifier [Axis]: North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.5		6.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.5		6.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.5		6.7
Investment, Identifier [Axis]: North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.8		$ 4.1
Investment, Identifier [Axis]: North Haven Falcon Buyer, LLC and North Haven Falcon Holding Company, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.19%	[2]	7.00%	[1]		11.19%	[2]	11.19%	[2]	11.19%	[2]	11.19%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 25.3	[3],[4]	$ 22.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		23.5	[3],[4]	22.1	[6],[7]
Investment, Identifier [Axis]: North Haven Stack Buyer, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.1		10.0
Less: funded commitments		(0.8)		0.0
Total unfunded commitments		4.3		10.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.3		$ 10.0
Investment, Identifier [Axis]: North Haven Stack Buyer, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.90%	[2]	6.50%	[1]		9.90%	[2]	9.90%	[2]	9.90%	[2]	9.90%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 6.9	[3],[4]	$ 11.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.7	[3],[4]	11.0	[6],[7]
Investment, Identifier [Axis]: North Haven Stack Buyer, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.92%					9.92%		9.92%		9.92%		9.92%
Total first lien senior secured loans	[3],[4]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.8
Investment, Identifier [Axis]: Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C., Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.2	[4]	6.3	[7]
Investment, Identifier [Axis]: Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C., Class C units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		$ 0.0	[7]
Investment, Identifier [Axis]: Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.17%	[2]	6.75%	[1]		11.17%	[2]	11.17%	[2]	11.17%	[2]	11.17%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 23.5	[3],[4]	$ 23.9	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 23.5	[3],[4]	23.9	[6]
Investment, Identifier [Axis]: Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.17%					11.17%		11.17%		11.17%		11.17%
Total first lien senior secured loans	[3],[4]	$ 6.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 6.3
Investment, Identifier [Axis]: NueHealth Performance, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				6.2
Less: funded commitments				(3.3)
Total unfunded commitments				2.9
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 2.9
Investment, Identifier [Axis]: NueHealth Performance, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.25%											8.25%		8.25%		8.25%
Total first lien senior secured loans	[6]			$ 12.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 12.4
Investment, Identifier [Axis]: NueHealth Performance, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.25%											8.25%		8.25%		8.25%
Total first lien senior secured loans	[6],[7]			$ 3.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 3.0
Investment, Identifier [Axis]: NueHealth Performance, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.25%											8.25%		8.25%		8.25%
Total first lien senior secured loans	[6],[7]			$ 3.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 3.3
Investment, Identifier [Axis]: OMH-HealthEdge Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.02%	[2]	6.50%	[1]		10.02%	[2]	10.02%	[2]	10.02%	[2]	10.02%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 25.9	[3],[4]	$ 26.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 25.9	[3],[4]	$ 26.1	[6]
Investment, Identifier [Axis]: OMH-HealthEdge Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.02%	[2]	6.50%	[1]		10.02%	[2]	10.02%	[2]	10.02%	[2]	10.02%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 15.2	[3],[4]	$ 15.4	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.2	[3],[4]	15.4	[6]
Investment, Identifier [Axis]: OMH-HealthEdge Holdings, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.02%					10.02%		10.02%		10.02%		10.02%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: OTG Management, LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		13.1	[4]	15.8
Investment, Identifier [Axis]: OTG Management, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: OTG Management, LLC, Warrant to purchase common units
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 0.0
Investment, Identifier [Axis]: OTG Management, LLC, Warrant to purchase up to 7.73% of common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0
Investment, Identifier [Axis]: OUTFRONT Media Inc., Series A convertible perpetual preferred stock
Schedule of Investments [Line Items]
Coupon | Rate		700.00%	[2]	7.00%	[1]		700.00%	[2]	700.00%	[2]	700.00%	[2]	700.00%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 33.6	[4],[5]	$ 44.4	[7],[8]
Investment, Identifier [Axis]: Offen, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.6
Less: funded commitments		0.0
Total unfunded commitments		5.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 5.6
Investment, Identifier [Axis]: Offen, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.51%					8.51%		8.51%		8.51%		8.51%
Total first lien senior secured loans	[4]	$ 1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	1.4
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				11.0
Less: funded commitments				(10.3)
Total unfunded commitments				0.7
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				0.7
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 0.0
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 42.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 34.5
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 0.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 0.8
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 10.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 8.3
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7]			$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.2
Investment, Identifier [Axis]: Olympia Acquisition, Inc. and Olympia TopCo, L.P., Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.3
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P. and Asclepius Hodlings LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		8.3
Redemptions (cost)		0.0
Sales (cost)		0.0
Interest income		3.2
Capital structuring service fees		0.3
Dividend income		0.0
Other income		0.0
Net realized gains (losses):		0.0
Net unrealized gains (losses):		(11.7)
Fair Value		44.7
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.6
Less: funded commitments		0.0
Total unfunded commitments		1.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		(1.6)
Total net adjusted unfunded revolving and delayed draw commitments		0.0
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3]	50.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	38.1
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	8.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	6.6
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: OneDigital Borrower LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.5		7.5
Less: funded commitments		(0.4)		0.0
Total unfunded commitments		7.1		7.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.1		$ 7.5
Investment, Identifier [Axis]: OneDigital Borrower LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	0.0
Investment, Identifier [Axis]: OneDigital Holdings, Achilles Holdco, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Opal Fuels LLC and Opal Fuels Inc., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[5],[11]	22.3
Investment, Identifier [Axis]: Opal Fuels LLC and Opal Fuels Inc., Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[5]	28.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[5]	$ 28.5
Investment, Identifier [Axis]: Opal Fuels LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans				52.7
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 47.8
Investment, Identifier [Axis]: OpenMarket Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.98%	[2]	7.00%	[1]		10.98%	[2]	10.98%	[2]	10.98%	[2]	10.98%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 51.6	[3],[4],[5]	$ 50.7	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 51.1	[3],[4],[5]	$ 50.1	[6],[7],[8]
Investment, Identifier [Axis]: Osmose Utilities Services, Inc. and Pine Intermediate Holding LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.13%	[2]	7.25%	[1]		11.13%	[2]	11.13%	[2]	11.13%	[2]	11.13%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 55.3	[3],[4]	$ 55.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		51.4	[3],[4]	54.7	[6],[7]
Investment, Identifier [Axis]: PCG-Ares Sidecar Investment II, L.P.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.1		0.1
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		4.2		0.8
Fair Value		15.5		11.1
Investment, Identifier [Axis]: PCG-Ares Sidecar Investment II, L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		15.5	[4],[5]	11.1	[7],[8],[19]
Investment, Identifier [Axis]: PCG-Ares Sidecar Investment, L.P.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.6
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(0.6)		1.5
Fair Value		0.7		1.3
Investment, Identifier [Axis]: PCG-Ares Sidecar Investment, L.P. and PCG-Ares Sidecar Investment II, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		50.0		50.0
Less: funded commitments		(12.5)		(12.5)
Total unfunded commitments		37.5		37.5
Less: commitments substantially at discretion of the Company		37.5		37.5
Total net adjusted unfunded revolving and delayed draw commitments		0.0		0.0
Investment, Identifier [Axis]: PCG-Ares Sidecar Investment, L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.7	[5]	1.3	[8],[19]
Investment, Identifier [Axis]: PDDS HoldCo, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.1
Less: funded commitments		0.0
Total unfunded commitments		2.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.1
Investment, Identifier [Axis]: PDDS Holdco, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.30%					12.30%		12.30%		12.30%		12.30%
Total first lien senior secured loans	[3],[4]	$ 9.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	9.2
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.6		7.6
Less: funded commitments		(6.1)		0.0
Total unfunded commitments		1.5		7.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.5		7.6
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.7	[4]	$ 2.9	[7]
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.73%	[2]	5.50%	[1]		8.73%	[2]	8.73%	[2]	8.73%	[2]	8.73%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 52.9	[3],[4]	$ 53.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 51.9	[3],[4]	$ 53.5	[6]
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.82%					8.82%		8.82%		8.82%		8.82%
Total first lien senior secured loans	[3],[4]	$ 6.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 6.0
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.50%											9.50%		9.50%		9.50%
Total first lien senior secured loans	[6],[7]			$ 7.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 7.2
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Second lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.18%					13.18%		13.18%		13.18%		13.18%
Total first lien senior secured loans	[3],[4]	$ 70.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 68.7
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		13.18%	[2]	9.50%	[1]		13.18%	[2]	13.18%	[2]	13.18%	[2]	13.18%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 8.7	[3],[4]	$ 70.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.6	[3],[4]	$ 70.1	[6],[7]
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Second lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		13.18%	[2]	9.50%	[1]		13.18%	[2]	13.18%	[2]	13.18%	[2]	13.18%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 8.3	[3],[4]	$ 8.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.1	[3],[4]	$ 8.3	[6],[7]
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Second lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		13.18%	[2]	9.50%	[1]		13.18%	[2]	13.18%	[2]	13.18%	[2]	13.18%	[2]	9.50%	[1]	9.50%	[1]	9.50%	[1]
Total first lien senior secured loans		$ 7.2	[3],[4]	$ 8.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		7.1	[3],[4]	8.7	[6],[7]
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		21.2	[4]	19.7	[7]
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC), Common unit
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 7.4
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC), First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 14.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 14.9
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC), First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 2.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			2.8
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC, Common unit
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 8.3
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 14.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 14.9
Investment, Identifier [Axis]: PS Operating Company LLC and PS OP Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.73%					10.73%		10.73%		10.73%		10.73%
Total first lien senior secured loans	[3],[4]	$ 4.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	4.5
Investment, Identifier [Axis]: PS Operating Company LLC and PS Op Holdings LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		6.3		3.9
Redemptions (cost)		4.6		1.2
Sales (cost)		0.0		0.0
Interest income		1.5		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		1.0		0.0
Fair Value		27.7		25.1
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.9		5.9
Less: funded commitments		(4.5)		(2.8)
Total unfunded commitments		1.4		3.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.4		3.1
Investment, Identifier [Axis]: Padres L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				64.2
Less: funded commitments				0.0
Total unfunded commitments				64.2
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 64.2
Investment, Identifier [Axis]: Padres L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[7]			$ 92.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			92.8
Investment, Identifier [Axis]: Panda Temple Power, LLC and T1 Power Holdings LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				19.6
Sales (cost)				0.0
Interest income				0.2
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				9.8
Net unrealized gains (losses):				0.9
Fair Value				0.0
Investment, Identifier [Axis]: Partnership Capital Growth Investors III, L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.9	[4],[5],[11]	3.6	[8],[12]
Investment, Identifier [Axis]: Pathway Vet Alliance LLC and Jedi Group Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.9		1.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		1.9		1.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.9		1.9
Investment, Identifier [Axis]: Pathway Vet Alliance LLC and Jedi Group Holdings LLC, Class R common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.5	[4]	$ 7.9	[7]
Investment, Identifier [Axis]: Pathway Vet Alliance LLC and Jedi Group Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Pathway Vet Alliance LLC and Jedi Group Holdings LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.13%	[2]	8.75%	[1]		12.13%	[2]	12.13%	[2]	12.13%	[2]	12.13%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 76.3	[3],[4]	$ 76.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		65.6	[3],[4]	76.3	[6],[7]
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.2		6.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.2		6.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.2		$ 6.7
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.87%	[2]	6.25%	[1]		8.87%	[2]	8.87%	[2]	8.87%	[2]	8.87%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 16.0	[3],[4]	$ 11.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		15.5	[3],[4]	11.5	[6],[7]
Investment, Identifier [Axis]: PayNearMe, Inc., Warrant to purchase shares of Series E preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: PayNearMe, Inc., Warrant to purchase up to 195,726 shares of Series E preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Paya, Inc and GTCR-Ultra Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.5		4.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.5		4.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.5		4.5
Investment, Identifier [Axis]: Paya, Inc and GTCR-Ultra Holdings LLC, Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.6	[4]	2.1	[7]
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		20.6		45.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		20.6		45.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		20.6		45.9
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.3		$ 12.3
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.25%											6.25%		6.25%		6.25%
Total first lien senior secured loans	[6],[7]			$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.2
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 13.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 13.7
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: Pegasus Global Enterprise Holdings, LLC, Mekone Blocker Acquisition, Inc. and Mekone Parent, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.75%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 29.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3],[4]	29.9	[6],[7]
Investment, Identifier [Axis]: Pelican Products, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3		2.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.3		2.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.3		$ 2.3
Investment, Identifier [Axis]: Pelican Products, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.20%	[2]	8.25%	[1]		12.20%	[2]	12.20%	[2]	12.20%	[2]	12.20%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 60.0	[3],[4]	$ 60.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		55.8	[3],[4]	59.4	[6],[7]
Investment, Identifier [Axis]: People Corporation
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		20.6		29.4
Less: funded commitments		(1.3)		(2.9)
Total unfunded commitments		19.3		26.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 19.3		$ 26.5
Investment, Identifier [Axis]: People Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.91%	[2]	6.25%	[1]		10.91%	[2]	10.91%	[2]	10.91%	[2]	10.91%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 40.9	[3],[4],[5]	$ 1.4	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 40.5	[3],[4],[5]	$ 1.4	[6],[7],[8]
Investment, Identifier [Axis]: People Corporation, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.91%	[2]	7.25%	[1]		10.91%	[2]	10.91%	[2]	10.91%	[2]	10.91%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 12.8	[3],[4],[5]	$ 44.3	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.6	[3],[4],[5]	$ 44.3	[6],[7],[8]
Investment, Identifier [Axis]: People Corporation, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.17%	[2]	7.25%	[1]		10.17%	[2]	10.17%	[2]	10.17%	[2]	10.17%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 8.1	[3],[4],[5]	$ 13.8	[6],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.8	[3],[4],[5]	$ 13.8	[6],[8]
Investment, Identifier [Axis]: People Corporation, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.99%	[2]	7.25%	[1]		10.99%	[2]	10.99%	[2]	10.99%	[2]	10.99%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 1.3	[3],[4],[5]	$ 2.9	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.3	[3],[4],[5]	2.9	[6],[7],[8]
Investment, Identifier [Axis]: Perforce Software, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.5		0.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.5		0.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.5		0.5
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.38%					9.38%		9.38%		9.38%		9.38%
Total first lien senior secured loans	[3],[4]	$ 5.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	5.0
Investment, Identifier [Axis]: Petroleum Service Group LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		17.5		16.9
Less: funded commitments		(4.4)		(3.8)
Total unfunded commitments		13.1		13.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 13.1		$ 13.1
Investment, Identifier [Axis]: Petroleum Service Group LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	7.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 34.5	[3],[4]	$ 8.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 34.5	[3],[4]	$ 8.1	[6],[7]
Investment, Identifier [Axis]: Petroleum Service Group LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.72%	[2]	1.00%	[1]		10.72%	[2]	10.72%	[2]	10.72%	[2]	10.72%	[2]	1.00%	[1]	1.00%	[1]	1.00%	[1]
Total first lien senior secured loans		$ 11.6	[3],[4]	$ 0.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.6	[3],[4]	$ 0.2	[6],[7]
Investment, Identifier [Axis]: Petroleum Service Group LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 34.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 34.2
Investment, Identifier [Axis]: Petroleum Service Group LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.7
Investment, Identifier [Axis]: Petroleum Service Group LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		9.71%	[2]	7.00%	[1]		9.71%	[2]	9.71%	[2]	9.71%	[2]	9.71%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 2.5	[3],[4],[13]	$ 2.2	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.5	[3],[4],[13]	$ 2.2	[6],[7],[14]
Investment, Identifier [Axis]: Petrus Buyer, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.7
Less: funded commitments		0.0
Total unfunded commitments		2.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.7
Investment, Identifier [Axis]: Petrus Buyer, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.70%					10.70%		10.70%		10.70%		10.70%
Total first lien senior secured loans		$ 5.1
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.9
Investment, Identifier [Axis]: Petvisor Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		37.6
Less: funded commitments		0.0
Total unfunded commitments		37.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 37.6
Investment, Identifier [Axis]: Petvisor Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.21%					10.21%		10.21%		10.21%		10.21%
Total first lien senior secured loans	[3],[4]	$ 21.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	21.5
Investment, Identifier [Axis]: PhyMED Management LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			15.00%											15.00%		15.00%		15.00%
Total first lien senior secured loans	[6],[7]			$ 55.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			52.4
Investment, Identifier [Axis]: Ping Identity Holding Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.2
Less: funded commitments		0.0
Total unfunded commitments		0.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.32%					11.32%		11.32%		11.32%		11.32%
Total first lien senior secured loans	[3],[4]	$ 11.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	11.0
Investment, Identifier [Axis]: Piper Jaffray Merchant Banking Fund I, L.P., Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.5	[5],[11]	1.0	[8],[12]
Investment, Identifier [Axis]: Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC, Co-Invest units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.5	[4]	$ 0.9	[7]
Investment, Identifier [Axis]: Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.41%					8.41%		8.41%		8.41%		8.41%
Total first lien senior secured loans	[3],[4]	$ 22.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 20.1
Investment, Identifier [Axis]: Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.98%	[2]	8.00%	[1]		11.98%	[2]	11.98%	[2]	11.98%	[2]	11.98%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 55.0	[3],[4]	$ 55.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		48.9	[3],[4]	55.0	[6],[7]
Investment, Identifier [Axis]: Pluralsight, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.3		0.3
Less: funded commitments		(0.2)		0.0
Total unfunded commitments		0.1		0.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.1		$ 0.3
Investment, Identifier [Axis]: Pluralsight, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.83%	[2]	9.00%	[1]		11.83%	[2]	11.83%	[2]	11.83%	[2]	11.83%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 106.2	[3],[4]	$ 117.7	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 104.0	[3],[4]	117.7	[6],[7]
Investment, Identifier [Axis]: Pluralsight, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.36%					12.36%		12.36%		12.36%		12.36%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Polymer Solutions Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.92%					8.92%		8.92%		8.92%		8.92%
Total first lien senior secured loans	[3],[4]	$ 0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.0
Investment, Identifier [Axis]: Poplicus Incorporated, Warrant to purchase shares of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Poplicus Incorporated, Warrant to purchase up to 2,402,991 shares of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: PosiGen, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: PosiGen, Inc., Warrant to purchase shares of series D-1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: PosiGen, Inc., Warrant to purchase up to 1,112,022 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: PosiGen, Inc., Warrant to purchase up to 101,555 shares of series D-1 preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Potomac Intermediate Holdings II LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		6.0		68.4
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(42.4)		0.0
Fair Value		143.2		179.7
Investment, Identifier [Axis]: Potomac Intermediate Holdings II LLC, Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		143.2		179.7
Investment, Identifier [Axis]: PracticeTek Purchaser, LLC and GSV PracticeTek Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			8.2
Investment, Identifier [Axis]: Precinmac (US) Holdings Inc., Trimaster Manufacturing Inc. and Blade Group Holdings, LP.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				15.5
Less: funded commitments				0.0
Total unfunded commitments				15.5
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				15.5
Investment, Identifier [Axis]: Precinmac (US) Holdings Inc., Trimaster Manufacturing Inc. and Blade Group Holdings, LP., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 26.5	[4]	$ 13.4	[7]
Investment, Identifier [Axis]: Precinmac (US) Holdings Inc., Trimaster Manufacturing Inc. and Blade Group Holdings, LP., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.42%	[2]	7.00%	[1]		10.42%	[2]	10.42%	[2]	10.42%	[2]	10.42%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 11.7	[3],[4],[5]	$ 45.8	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 11.4	[3],[4],[5]	45.4	[6],[7],[8]
Investment, Identifier [Axis]: Precinmac (US) Holdings Inc., Trimaster Manufacturing Inc. and Blade Group Holdings, LP., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.42%					10.42%		10.42%		10.42%		10.42%
Total first lien senior secured loans	[3],[4],[5]	$ 4.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	3.9
Investment, Identifier [Axis]: Precision Concepts International LLC and Precision Concepts Canada Corporation
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		19.2
Less: funded commitments		(6.2)
Total unfunded commitments		13.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 13.0
Investment, Identifier [Axis]: Precision Concepts International LLC and Precision Concepts Canada Corporation, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.18%					10.18%		10.18%		10.18%		10.18%
Total first lien senior secured loans	[3],[4],[5]	$ 14.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 14.7
Investment, Identifier [Axis]: Precision Concepts International LLC and Precision Concepts Canada Corporation, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.43%					10.43%		10.43%		10.43%		10.43%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.1
Investment, Identifier [Axis]: Precision Concepts International LLC and Precision Concepts Canada Corporation, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.18%					10.18%		10.18%		10.18%		10.18%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.1
Investment, Identifier [Axis]: Precision Concepts International LLC and Precision Concepts Canada Corporation, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.18%					10.18%		10.18%		10.18%		10.18%
Total first lien senior secured loans	[3],[4],[5]	$ 6.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	6.2
Investment, Identifier [Axis]: Premier Specialties, Inc. and RMCF V CIV XLIV, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		11.0		11.0
Less: funded commitments		(2.3)		0.0
Total unfunded commitments		8.7		11.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.7		$ 11.0
Investment, Identifier [Axis]: Premier Specialties, Inc. and RMCF V CIV XLIV, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	6.75%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 27.3	[3],[4]	$ 27.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 25.6	[3],[4]	27.3	[6],[7]
Investment, Identifier [Axis]: Premier Specialties, Inc. and RMCF V CIV XLIV, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.38%					10.38%		10.38%		10.38%		10.38%
Total first lien senior secured loans	[3],[4]	$ 2.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	2.2
Investment, Identifier [Axis]: Premier Specialties, Inc. and RMCF V CIV XLIV, L.P., Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.8	[4]	4.1	[7]
Investment, Identifier [Axis]: Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		36.0		36.0
Less: funded commitments		(0.6)		(12.6)
Total unfunded commitments		35.4		23.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		35.4		23.4
Investment, Identifier [Axis]: Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.8	[4]	$ 17.5	[7]
Investment, Identifier [Axis]: Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		7.92%	[2]	3.72%	[1]		7.92%	[2]	7.92%	[2]	7.92%	[2]	7.92%	[2]	3.72%	[1]	3.72%	[1]	3.72%	[1]
Total first lien senior secured loans		$ 8.6	[3],[4]	$ 8.6
Investments Activity And Fair Value Table [Abstract]
Fair Value		8.1	[3],[4]	$ 8.6
Investment, Identifier [Axis]: Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			3.41%											3.41%		3.41%		3.41%
Total first lien senior secured loans		0.0	[15]	$ 12.0	[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[15]	$ 12.0	[7],[14]
Investment, Identifier [Axis]: Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.67%	[2]	7.72%	[1]		11.67%	[2]	11.67%	[2]	11.67%	[2]	11.67%	[2]	7.72%	[1]	7.72%	[1]	7.72%	[1]
Total first lien senior secured loans		$ 67.1	[4]	$ 67.1	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		64.4	[4]	67.1	[7]
Investment, Identifier [Axis]: Prime Buyer, L.L.C.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.9
Less: funded commitments		(2.7)
Total unfunded commitments		13.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 13.2
Investment, Identifier [Axis]: Prime Buyer, L.L.C., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.88%					9.88%		9.88%		9.88%		9.88%
Total first lien senior secured loans	[3],[4]	$ 2.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	2.6
Investment, Identifier [Axis]: Primrose Holding Corporation
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		4.6		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		28.9		0.0
Net unrealized gains (losses):		(22.4)		12.9
Fair Value		$ 0.0		27.0
Investment, Identifier [Axis]: Primrose Holding Corporation, Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 27.0
Investment, Identifier [Axis]: Priority Holdings, LLC and Priority Technology Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.7	[3],[4],[5]	$ 35.8	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.7	[3],[4],[5]	35.8	[6],[7],[8]
Investment, Identifier [Axis]: Priority Holdings, LLC and Priority Technology Holdings, Inc., Senior preferred stock
Schedule of Investments [Line Items]
Coupon	[2]	16.73%					16.73%		16.73%		16.73%		16.73%
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 73.2	[4],[5]	68.3	[6],[7],[8]
Investment, Identifier [Axis]: Priority Holdings, LLC and Priority Technology Holdings, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8]			3.4
Investment, Identifier [Axis]: Priority Holdings, LLC and Priority Technology Holdings, Inc., Warrant to purchase up to 527,226 units of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	2.8
Investment, Identifier [Axis]: Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.3		29.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.3		29.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.3		29.7
Investment, Identifier [Axis]: Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.4	[4]	$ 7.9	[7]
Investment, Identifier [Axis]: Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.47%	[2]	6.25%	[1]		10.47%	[2]	10.47%	[2]	10.47%	[2]	10.47%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 65.0	[3],[4]	$ 93.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		63.1	[3],[4]	92.8	[6],[7]
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		2.5		11.5
Redemptions (cost)		0.3		0.1
Sales (cost)		0.0		0.0
Interest income		7.0		4.8
Capital structuring service fees		0.1		0.3
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.1
Net unrealized gains (losses):		33.6		(4.3)
Fair Value		97.3		56.3
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				2.5
Less: funded commitments				0.0
Total unfunded commitments				2.5
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				2.5
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 34.3	[4]	$ 0.6	[7]
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.00%											6.00%		6.00%		6.00%
Total first lien senior secured loans	[6],[7]			$ 15.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			15.0
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon	[2]	12.85%					12.85%		12.85%		12.85%		12.85%
Total first lien senior secured loans	[3],[4]	$ 39.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 39.1
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon	[2]	11.85%					11.85%		11.85%		11.85%		11.85%
Total first lien senior secured loans		$ 15.4	[3],[4]	34.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 15.4	[3],[4]	$ 34.9	[6],[7]
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon		11.88%	[2]	8.50%	[1]		11.88%	[2]	11.88%	[2]	11.88%	[2]	11.88%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 7.6	[3],[4]	$ 0.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.6	[3],[4]	0.8	[6],[7]
Investment, Identifier [Axis]: Production Resource Group, L.L.C. and PRG III, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon	[2]	11.88%					11.88%		11.88%		11.88%		11.88%
Total first lien senior secured loans		$ 0.9	[3],[4]	5.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.9	[3],[4]	5.0	[6],[7]
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1
Less: funded commitments		0.0
Total unfunded commitments		0.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.1
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4]	17.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 17.1
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	14.00%					14.00%		14.00%		14.00%		14.00%
Total first lien senior secured loans	[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.1
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc., Series E preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.6
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc., Warrant to purchase up to 3,280,444 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.8
Investment, Identifier [Axis]: Professional Fighters League, LLC and PFL MMA, Inc., Warrant to purchase up to 57,322 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	0.2
Investment, Identifier [Axis]: ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		13.3		15.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		13.3		15.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 13.3		$ 15.0
Investment, Identifier [Axis]: ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 5.5	[3],[4]	$ 3.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.4	[3],[4]	3.9	[6],[7]
Investment, Identifier [Axis]: ProfitSolv Purchaser, Inc. and PS Co-Invest, L.P., Limited partnership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.5	[4]	1.6	[7]
Investment, Identifier [Axis]: Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		14.4	[4]	16.8	[7]
Investment, Identifier [Axis]: Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc., Class B common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[4]	0.2	[7]
Investment, Identifier [Axis]: Project Alpha Intermediate Holding, Inc. and Qlik Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.39%					8.39%		8.39%		8.39%		8.39%
Total first lien senior secured loans	[4],[11]	$ 2.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	2.8
Investment, Identifier [Axis]: Project Essential Bidco, Inc. and Project Essential Super Parent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.1		1.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		1.1		1.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.1		$ 1.1
Investment, Identifier [Axis]: Project Essential Bidco, Inc. and Project Essential Super Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.99%	[2]	6.75%	[1]		9.99%	[2]	9.99%	[2]	9.99%	[2]	9.99%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 36.2	[3],[4]	$ 36.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		34.7	[3],[4]	35.8	[6],[7]
Investment, Identifier [Axis]: Project Essential Bidco, Inc. and Project Essential Super Parent, Inc., Preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		30.2	[4]	28.5	[6],[7]
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.5		43.8
Less: funded commitments		(2.1)		(0.9)
Total unfunded commitments		3.4		42.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.4		42.9
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			1.9
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.3	[4]	$ 0.8	[7]
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.25%											9.25%		9.25%		9.25%
Total first lien senior secured loans	[6]			$ 44.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 44.1
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.07%					12.07%		12.07%		12.07%		12.07%
Total first lien senior secured loans	[3],[4]	$ 43.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 43.6
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		12.07%	[2]	9.25%	[1]		12.07%	[2]	12.07%	[2]	12.07%	[2]	12.07%	[2]	9.25%	[1]	9.25%	[1]	9.25%	[1]
Total first lien senior secured loans		$ 14.3	[3],[4]	$ 12.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.3	[3],[4]	$ 12.9	[6],[7]
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		12.07%	[2]	9.25%	[1]		12.07%	[2]	12.07%	[2]	12.07%	[2]	12.07%	[2]	9.25%	[1]	9.25%	[1]	9.25%	[1]
Total first lien senior secured loans		$ 12.8	[3],[4]	$ 19.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.8	[3],[4]	$ 19.4	[6],[7]
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.07%					12.07%		12.07%		12.07%		12.07%
Total first lien senior secured loans	[3],[4]	$ 4.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 4.9
Investment, Identifier [Axis]: Project Potter Buyer, LLC and Project Potter Parent, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		12.07%	[2]	10.50%	[1]		12.07%	[2]	12.07%	[2]	12.07%	[2]	12.07%	[2]	10.50%	[1]	10.50%	[1]	10.50%	[1]
Total first lien senior secured loans		$ 2.1	[3],[4],[13]	$ 0.8	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.1	[3],[4],[13]	$ 0.8	[6],[7],[14]
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp. (dba Wellsky), Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7]			$ 193.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			193.1
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.88%					10.88%		10.88%		10.88%		10.88%
Total first lien senior secured loans	[3],[4]	$ 193.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	181.5
Investment, Identifier [Axis]: Proofpoint, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.1		3.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.1		3.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.1		$ 3.1
Investment, Identifier [Axis]: Proofpoint, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		7.98%	[2]	3.75%	[1]		7.98%	[2]	7.98%	[2]	7.98%	[2]	7.98%	[2]	3.75%	[1]	3.75%	[1]	3.75%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4],[11]	$ 1.0	[6],[7],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.9	[3],[4],[11]	$ 1.0	[6],[7],[12]
Investment, Identifier [Axis]: Proofpoint, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.98%	[2]	6.75%	[1]		10.98%	[2]	10.98%	[2]	10.98%	[2]	10.98%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 34.6	[3],[4]	$ 34.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		34.6	[3],[4]	34.6	[6],[7]
Investment, Identifier [Axis]: Pueblo Mechanical and Controls, LLC and OMERS PMC Investment Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.6
Less: funded commitments		0.0
Total unfunded commitments		3.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.6
Investment, Identifier [Axis]: Pueblo Mechanical and Controls, LLC and OMERS PMC Investment Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 11.0
Investment, Identifier [Axis]: Pueblo Mechanical and Controls, LLC and OMERS PMC Investment Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.47%					10.47%		10.47%		10.47%		10.47%
Total first lien senior secured loans	[3],[4]	$ 1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.4
Investment, Identifier [Axis]: Pyramid Management Advisors, LLC and Pyramid Investors, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.8		9.7
Less: funded commitments		(9.8)		(9.7)
Total unfunded commitments		0.0		0.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.0		$ 0.0
Investment, Identifier [Axis]: Pyramid Management Advisors, LLC and Pyramid Investors, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		11.63%	[2]	8.00%	[1]		11.63%	[2]	11.63%	[2]	11.63%	[2]	11.63%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 16.9	[3],[4]	$ 18.2	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 16.9	[3],[4]	$ 16.8	[6]
Investment, Identifier [Axis]: Pyramid Management Advisors, LLC and Pyramid Investors, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon		11.63%	[2]	8.00%	[1]		11.63%	[2]	11.63%	[2]	11.63%	[2]	11.63%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 6.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 5.8	[6],[7]
Investment, Identifier [Axis]: Pyramid Management Advisors, LLC and Pyramid Investors, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon		11.60%	[2]	8.00%	[1]		11.60%	[2]	11.60%	[2]	11.60%	[2]	11.60%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 9.7	[3],[4],[13]	$ 9.6	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.7	[3],[4],[13]	8.8	[6],[7],[14]
Investment, Identifier [Axis]: Pyramid Management Advisors, LLC and Pyramid Investors, LLC, Preferred membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.9		0.5
Investment, Identifier [Axis]: QF Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.3		6.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.3		6.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.3		$ 6.0
Investment, Identifier [Axis]: QF Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7]			$ 8.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 8.1
Investment, Identifier [Axis]: QF Holdings, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.02%					11.02%		11.02%		11.02%		11.02%
Total first lien senior secured loans	[3],[4]	$ 8.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 8.1
Investment, Identifier [Axis]: QF Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.43%	[2]	7.50%	[1]		10.43%	[2]	10.43%	[2]	10.43%	[2]	10.43%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 6.8	[3],[4]	$ 15.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.8	[3],[4]	15.5	[6],[7]
Investment, Identifier [Axis]: QF Holdings, Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.64%					10.64%		10.64%		10.64%		10.64%
Total first lien senior secured loans	[3],[4]	$ 3.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	3.7
Investment, Identifier [Axis]: Qnnect, LLC and Connector TopCo, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.8
Less: funded commitments		0.0
Total unfunded commitments		2.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.8
Investment, Identifier [Axis]: Qnnect, LLC and Connector TopCo, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.11%					11.11%		11.11%		11.11%		11.11%
Total first lien senior secured loans	[3],[4]	$ 10.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	10.3
Investment, Identifier [Axis]: Qnnect, LLC and Connector TopCo, LP, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	9.9
Investment, Identifier [Axis]: R2 Acquisition Corp., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[4]	0.5	[7]
Investment, Identifier [Axis]: RB Holdings InterCo, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.6
Less: funded commitments		(1.8)
Total unfunded commitments		3.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.8
Investment, Identifier [Axis]: RB Holdings InterCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.32%					9.32%		9.32%		9.32%		9.32%
Total first lien senior secured loans	[3],[4]	$ 11.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 11.2
Investment, Identifier [Axis]: RB Holdings InterCo, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.28%					9.28%		9.28%		9.28%		9.28%
Total first lien senior secured loans	[3],[4]	$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.7
Investment, Identifier [Axis]: RC V Tecmo Investor LLC, Common member units
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.9	[4]	19.3	[7]
Investment, Identifier [Axis]: RD Holdco Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0
Redemptions (cost)		0.1
Sales (cost)		0.0
Interest income		0.0
Capital structuring service fees		0.0
Dividend income		0.0
Other income		0.0
Net realized gains (losses):		0.0
Net unrealized gains (losses):		(10.6)
Fair Value		10.3
Investment, Identifier [Axis]: RD Holdco Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: RD Holdco Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		24.2
Investments Activity And Fair Value Table [Abstract]
Fair Value		10.2
Investment, Identifier [Axis]: RD Holdco Inc., Warrants to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: RE Community Holdings GP, LLC and RE Community Holdings, LP, Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0	[7]
Investment, Identifier [Axis]: RE Community Holdings GP, LLC and RE Community Holdings, LP, Limited partnership interest 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0	[7]
Investment, Identifier [Axis]: RF HP SCF Investor, LLC, Membership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		25.9	[4],[5]	19.0	[7],[8]
Investment, Identifier [Axis]: RMS HoldCo II, LLC & RMS Group Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.9
Less: funded commitments		0.0
Total unfunded commitments		2.9
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.9
Investment, Identifier [Axis]: RMS HoldCo II, LLC & RMS Group Holdings, Inc., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 5.5
Investment, Identifier [Axis]: RMS HoldCo II, LLC & RMS Group Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: RMS HoldCo II, LLC & RMS Group Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: RMS HoldCo II, LLC and RMS Group Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				2.9
Less: funded commitments				0.0
Total unfunded commitments				2.9
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				2.9
Investment, Identifier [Axis]: RMS Holdco II, LLC & RMS Group Holdings, Inc., Class A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 4.6
Investment, Identifier [Axis]: RMS Holdco II, LLC & RMS Group Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 23.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			23.3
Investment, Identifier [Axis]: RSC Acquisition, Inc. and RSC Insurance Brokerage, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.6		0.6
Less: funded commitments		0.0		(0.3)
Total unfunded commitments		0.6		0.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.6		$ 0.3
Investment, Identifier [Axis]: RSC Acquisition, Inc. and RSC Insurance Brokerage, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.79%	[2]	6.25%	[1]		9.79%	[2]	9.79%	[2]	9.79%	[2]	9.79%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 32.8	[3],[4]	$ 33.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		31.8	[3],[4]	$ 33.1	[6]
Investment, Identifier [Axis]: RSC Acquisition, Inc. and RSC Insurance Brokerage, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.75%											7.75%		7.75%		7.75%
Total first lien senior secured loans	[6],[7],[14]			$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			0.3
Investment, Identifier [Axis]: RTI Surgical, Inc. and Pioneer Surgical Technology, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.9		15.9
Less: funded commitments		(9.8)		(5.0)
Total unfunded commitments		6.1		10.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.1		$ 10.9
Investment, Identifier [Axis]: RTI Surgical, Inc. and Pioneer Surgical Technology, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.02%	[2]	8.25%	[1]		10.02%	[2]	10.02%	[2]	10.02%	[2]	10.02%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 22.5	[3],[4]	$ 28.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 22.3	[3],[4]	$ 28.5	[6]
Investment, Identifier [Axis]: RTI Surgical, Inc. and Pioneer Surgical Technology, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		11.09%	[2]	8.25%	[1]		11.09%	[2]	11.09%	[2]	11.09%	[2]	11.09%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 9.8	[3],[4]	$ 5.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.7	[3],[4]	5.0	[6],[7]
Investment, Identifier [Axis]: Radius Aerospace, Inc. and Radius Aerospace Europe Limited
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.8		2.9
Less: funded commitments		(0.7)		0.0
Total unfunded commitments		2.1		2.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.1		2.9
Investment, Identifier [Axis]: Radius Aerospace, Inc. and Radius Aerospace Europe Limited, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.68%					8.68%		8.68%		8.68%		8.68%
Total first lien senior secured loans	[3],[4],[5]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.4
Investment, Identifier [Axis]: Radius Aerospace, Inc. and Radius Aerospace Europe Limited, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.08%					10.08%		10.08%		10.08%		10.08%
Total first lien senior secured loans	[3],[4],[5]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	0.4
Investment, Identifier [Axis]: Radwell Parent, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.4
Less: funded commitments		0.0
Total unfunded commitments		4.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.4
Investment, Identifier [Axis]: Radwell Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.33%					11.33%		11.33%		11.33%		11.33%
Total first lien senior secured loans	[3],[4]	$ 19.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	18.9
Investment, Identifier [Axis]: Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.4		4.4
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.4		4.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.4		4.4
Investment, Identifier [Axis]: Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.9		$ 4.8
Investment, Identifier [Axis]: Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	7.00%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 8.5	[3],[4],[5]	$ 28.5	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.2	[3],[4],[5]	$ 28.2	[6],[7],[8]
Investment, Identifier [Axis]: Rawlings Sporting Goods Company, Inc. and Easton Diamond Sports, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.75%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 49.7	[3],[4]	$ 93.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 49.7	[3],[4]	$ 93.2	[6],[7]
Investment, Identifier [Axis]: Rawlings Sporting Goods Company, Inc. and Easton Diamond Sports, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.75%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 8.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 8.8	[6],[7]
Investment, Identifier [Axis]: RealPage, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.88%	[2]	7.25%	[1]		10.88%	[2]	10.88%	[2]	10.88%	[2]	10.88%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 84.1	[3],[4]	$ 84.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		82.4	[3],[4]	84.1	[6],[7]
Investment, Identifier [Axis]: Reddy Ice LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.2		0.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.2		0.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2		$ 0.3
Investment, Identifier [Axis]: Reddy Ice LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.24%	[2]	7.50%	[1]		10.24%	[2]	10.24%	[2]	10.24%	[2]	10.24%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 61.3	[3],[4]	$ 61.9	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 60.0	[3],[4]	$ 61.9	[6]
Investment, Identifier [Axis]: Reddy Ice LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.24%	[2]	7.50%	[1]		10.24%	[2]	10.24%	[2]	10.24%	[2]	10.24%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 4.2	[3],[4]	$ 4.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.2	[3],[4]	$ 4.3	[6],[7]
Investment, Identifier [Axis]: Reddy Ice LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.24%	[2]	7.50%	[1]		10.24%	[2]	10.24%	[2]	10.24%	[2]	10.24%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 0.9	[3],[4]	$ 13.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.9	[3],[4]	$ 13.0	[6],[7]
Investment, Identifier [Axis]: Reddy Ice LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Redwood Services, LLC and Redwood Services Holdco, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.5		4.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.5		4.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.5		$ 4.7
Investment, Identifier [Axis]: Redwood Services, LLC and Redwood Services Holdco, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.17%	[2]	8.00%	[1]		11.17%	[2]	11.17%	[2]	11.17%	[2]	11.17%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 0.8	[3],[4]	$ 1.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.8	[3],[4]	$ 1.0	[6],[7]
Investment, Identifier [Axis]: Redwood Services, LLC and Redwood Services Holdco, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.17%	[2]	8.00%	[1]		11.17%	[2]	11.17%	[2]	11.17%	[2]	11.17%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 12.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	12.5	[6],[7]
Investment, Identifier [Axis]: Redwood Services, LLC and Redwood Services Holdco, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.17%					11.17%		11.17%		11.17%		11.17%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.2
Investment, Identifier [Axis]: Redwood Services, LLC and Redwood Services Holdco, LLC, Series D units
Investments Activity And Fair Value Table [Abstract]
Fair Value		33.9		11.6
Investment, Identifier [Axis]: Reef Lifestyle, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		37.7		32.8
Less: funded commitments		(37.7)		(13.2)
Total unfunded commitments		0.0		19.6
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.0		$ 19.6
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 25.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 25.0
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon	[2]	12.74%					12.74%		12.74%		12.74%		12.74%
Total first lien senior secured loans	[3],[4]	$ 23.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 22.9
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon		10.15%	[2]	8.50%	[1]		10.15%	[2]	10.15%	[2]	10.15%	[2]	10.15%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 1.3	[3],[4]	$ 1.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.3	[3],[4]	$ 1.1	[6]
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6],[7],[14]			$ 12.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			$ 12.1
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured revolving loan 1
Schedule of Investments [Line Items]
Coupon	[2]	14.50%					14.50%		14.50%		14.50%		14.50%
Total first lien senior secured loans	[3],[4],[13]	$ 35.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	$ 34.4
Investment, Identifier [Axis]: Reef Lifestyle, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon		14.32%	[2]	8.50%	[1]		14.32%	[2]	14.32%	[2]	14.32%	[2]	14.32%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4]	$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.0	[3],[4]	0.6	[6],[7]
Investment, Identifier [Axis]: Regent Education, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Regent Education, Inc., Warrant to purchase shares of common stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Regent Education, Inc., Warrant to purchase up to 5,393,194 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Regent Education, Inc., Warrant to purchase up to 987 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		28.0		28.0
Less: funded commitments		0.0		0.0
Total unfunded commitments		28.0		28.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 28.0		$ 28.0
Investment, Identifier [Axis]: Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.38%	[2]	6.50%	[1]		9.38%	[2]	9.38%	[2]	9.38%	[2]	9.38%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 2.7	[3],[4]	$ 37.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.7	[3],[4]	37.5	[6],[7]
Investment, Identifier [Axis]: Registrar Intermediate, LLC and PSP Registrar Co-Investment Fund, L.P., Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.6	[4]	2.6	[7]
Investment, Identifier [Axis]: Relativity ODA LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.8		3.8
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.8		3.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.8		3.8
Investment, Identifier [Axis]: Relativity ODA LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		22.5	[3],[4]	59.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.5	[3],[4]	59.8	[6],[7]
Investment, Identifier [Axis]: Repairify, Inc. and Repairify Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.3		7.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		7.3		7.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.3		7.3
Investment, Identifier [Axis]: Repairify, Inc. and Repairify Holdings, LLC, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.4	[4]	4.8	[7]
Investment, Identifier [Axis]: Respicardia, Inc., Warrant to purchase shares of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Revalize, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.9
Less: funded commitments		0.0
Total unfunded commitments		0.9
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.9
Investment, Identifier [Axis]: Revalize, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.6
Investment, Identifier [Axis]: Revalize, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.46%					10.46%		10.46%		10.46%		10.46%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.0
Investment, Identifier [Axis]: Rialto Management Group, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.3		1.3
Less: funded commitments		(0.2)		(0.2)
Total unfunded commitments		1.1		1.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.1		$ 1.1
Investment, Identifier [Axis]: Rialto Management Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7],[8]			$ 9.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 9.5
Investment, Identifier [Axis]: Rialto Management Group, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.88%					9.88%		9.88%		9.88%		9.88%
Total first lien senior secured loans	[3],[4],[5]	$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 0.3
Investment, Identifier [Axis]: Rialto Management Group, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	4.34%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	4.34%	[1]	4.34%	[1]	4.34%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4],[5]	$ 0.7	[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4],[5]	$ 0.7	[8]
Investment, Identifier [Axis]: Rialto Management Group, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	4.35%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	4.35%	[1]	4.35%	[1]	4.35%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4],[5]	$ 7.7	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4],[5]	$ 7.7	[7],[8]
Investment, Identifier [Axis]: Rialto Management Group, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[5],[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[5],[15]	$ 0.0	[8],[16]
Investment, Identifier [Axis]: Riser Merger Sub, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.8
Less: funded commitments		0.0
Total unfunded commitments		2.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.8
Investment, Identifier [Axis]: Riser Merger Sub, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.33%					9.33%		9.33%		9.33%		9.33%
Total first lien senior secured loans	[3],[4]	$ 0.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.7
Investment, Identifier [Axis]: Riverview Power LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.9
Less: funded commitments		0.0
Total unfunded commitments		8.9
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 8.9
Investment, Identifier [Axis]: Riverview Power LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		13.73%	[2]	10.00%	[1]		13.73%	[2]	13.73%	[2]	13.73%	[2]	13.73%	[2]	10.00%	[1]	10.00%	[1]	10.00%	[1]
Total first lien senior secured loans		$ 57.6	[3],[4]	$ 54.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		57.6	[3],[4]	54.2	[6],[7]
Investment, Identifier [Axis]: Rodeo AcquisitionCo LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.2		6.2
Less: funded commitments		(1.3)		(0.4)
Total unfunded commitments		4.9		5.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.9		$ 5.8
Investment, Identifier [Axis]: Rodeo AcquisitionCo LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	7.00%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 16.9	[3],[4]	$ 17.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 16.1	[3],[4]	$ 16.9	[6],[7]
Investment, Identifier [Axis]: Rodeo AcquisitionCo LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	7.00%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 1.3	[3],[4]	$ 0.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.2	[3],[4]	0.3	[6],[7]
Investment, Identifier [Axis]: Rug Doctor, LLC and RD Holdco Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				0.0
Sales (cost)				0.0
Interest income				2.4
Capital structuring service fees				0.0
Dividend income				0.0
Other income				0.0
Net realized gains (losses):				0.0
Net unrealized gains (losses):				(1.1)
Fair Value				21.0
Investment, Identifier [Axis]: Rug Doctor, LLC and RD Holdco Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value				0.0
Investment, Identifier [Axis]: Rug Doctor, LLC and RD Holdco Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[6],[7]			22.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			21.0
Investment, Identifier [Axis]: Rug Doctor, LLC and RD Holdco Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value				0.0
Investment, Identifier [Axis]: S Toys Holdings LLC (fka The Step2 Company, LLC)
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(0.1)		(0.3)
Fair Value		0.0		0.2
Investment, Identifier [Axis]: S Toys Holdings LLC (fka The Step2 Company, LLC), Class B common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.2
Investment, Identifier [Axis]: S Toys Holdings LLC (fka The Step2 Company, LLC), Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: S Toys Holdings LLC (fka The Step2 Company, LLC), Warrant to purchase units
Investments Activity And Fair Value Table [Abstract]
Fair Value				0.0
Investment, Identifier [Axis]: S Toys Holdings LLC (fka The Step2 Company, LLC), Warrant to purchase up to 3,157,895 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: SCI PH Parent, Inc., Series B shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.2	[4]	1.2	[7]
Investment, Identifier [Axis]: SCIH Salt Holdings Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.5		7.5
Less: funded commitments		(2.6)		(6.2)
Total unfunded commitments		4.9		1.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.9		$ 1.3
Investment, Identifier [Axis]: SCIH Salt Holdings Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		8.15%	[2]	5.00%	[1]		8.15%	[2]	8.15%	[2]	8.15%	[2]	8.15%	[2]	5.00%	[1]	5.00%	[1]	5.00%	[1]
Total first lien senior secured loans		$ 2.3	[3],[4],[13]	$ 2.1	[6],[7],[14]
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[3],[4],[13]	1.9	[6],[7],[14]
Investment, Identifier [Axis]: SCM Insurance Services Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.0		4.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.0		4.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.0		$ 4.3
Investment, Identifier [Axis]: SCM Insurance Services Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.16%	[2]	6.00%	[1]		11.16%	[2]	11.16%	[2]	11.16%	[2]	11.16%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 61.1	[3],[4],[5]	$ 20.4	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 61.1	[3],[4],[5]	$ 20.4	[6],[7],[8]
Investment, Identifier [Axis]: SCM Insurance Services Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.00%											10.00%		10.00%		10.00%
Total first lien senior secured loans	[6],[7],[8]			$ 60.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[8]			$ 60.0
Investment, Identifier [Axis]: SE1 Generation, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon		12.25%	[2]	10.25%	[1]		12.25%	[2]	12.25%	[2]	12.25%	[2]	12.25%	[2]	10.25%	[1]	10.25%	[1]	10.25%	[1]
Total first lien senior secured loans		$ 57.5	[4]	$ 58.8	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		57.5	[4]	57.0	[7]
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		15.2		10.2
Less: funded commitments		(8.3)		0.0
Total unfunded commitments		6.9		10.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 6.9		$ 10.2
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			5.75%											5.75%		5.75%		5.75%
Total first lien senior secured loans	[6]			$ 10.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 10.1
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3],[4]	$ 10.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 9.8
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.48%	[2]	5.75%	[1]		9.48%	[2]	9.48%	[2]	9.48%	[2]	9.48%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 6.2	[3],[4]	$ 6.3	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.1	[3],[4]	$ 6.3	[6]
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3],[4]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.4
Investment, Identifier [Axis]: SFE Intermediate Holdco LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3]	$ 8.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 8.1
Investment, Identifier [Axis]: SG Acquisition, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.17%	[2]	5.50%	[1]		9.17%	[2]	9.17%	[2]	9.17%	[2]	9.17%	[2]	5.50%	[1]	5.50%	[1]	5.50%	[1]
Total first lien senior secured loans		$ 33.8	[3],[4]	$ 35.6	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		33.5	[3],[4]	35.6	[6]
Investment, Identifier [Axis]: SHO Holding I Corporation, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		124.9	[4],[9]	116.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		82.4	[4],[9]	98.9	[6],[7]
Investment, Identifier [Axis]: SK SPV IV, LLC, Series A common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: SK SPV IV, LLC, Series B common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: SM Wellness Holdings, Inc. and SM Holdco, Inc
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				3.8
Less: funded commitments				0.0
Total unfunded commitments				3.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				3.8
Investment, Identifier [Axis]: SM Wellness Holdings, Inc. and SM Holdco, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.8
Less: funded commitments		0.0
Total unfunded commitments		3.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.8
Investment, Identifier [Axis]: SM Wellness Holdings, Inc. and SM Holdco, Inc., Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[4]	9.6	[7]
Investment, Identifier [Axis]: SM Wellness Holdings, Inc. and SM Holdco, Inc., Series B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		9.3	[4]	$ 0.0	[7]
Investment, Identifier [Axis]: SOC Telemed, Inc. and PSC Spark Holdings, LP, Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	4.8
Investment, Identifier [Axis]: SOC Telemed, Inc. and PSC Spark Holdings, LP, First lien senior secured loan 1
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	61.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 56.2
Investment, Identifier [Axis]: SOC Telemed, Inc. and PSC Spark Holdings, LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.19%					12.19%		12.19%		12.19%		12.19%
Total first lien senior secured loans	[3],[4]	$ 22.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	20.9
Investment, Identifier [Axis]: SOC Telemed, Inc. and PSC Spark Holdings, LP, Warrant to purchase up to 6,118 Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	4.7
Investment, Identifier [Axis]: SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			10.22%											10.22%		10.22%		10.22%
Total first lien senior secured loans	[6],[7]			$ 21.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			19.9
Investment, Identifier [Axis]: SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP, Limited partnership class A-1 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[4]	0.6	[7]
Investment, Identifier [Axis]: SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP, Limited partnership class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0	[4]	0.6	[7]
Investment, Identifier [Axis]: SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	21.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	14.3
Investment, Identifier [Axis]: SV-Burton Holdings, LLC & LBC Breeze Holdings LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value				$ 4.3
Investment, Identifier [Axis]: SV-Burton Holdings, LLC & LBC Breeze Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 11.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			10.9
Investment, Identifier [Axis]: SV-Burton Holdings, LLC and LBC Breeze Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.3		7.3
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.3		7.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.3		7.3
Investment, Identifier [Axis]: SV-Burton Holdings, LLC and LBC Breeze Holdings LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.8
Investment, Identifier [Axis]: SV-Burton Holdings, LLC and LBC Breeze Holdings LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.93%					9.93%		9.93%		9.93%		9.93%
Total first lien senior secured loans	[3],[4]	$ 1.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.3
Investment, Identifier [Axis]: SVP-Singer Holdings Inc. and SVP-Singer Holdings LP, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.0	[4]	$ 24.5	[7]
Investment, Identifier [Axis]: SVP-Singer Holdings Inc. and SVP-Singer Holdings LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.50%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 44.4	[3],[4]	$ 44.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 36.4	[3],[4]	42.3	[6],[7]
Investment, Identifier [Axis]: Safe Home Security, Inc., Security Systems Inc., Safe Home Monitoring, Inc., National Protective Services, Inc., Bright Integrations LLC and Medguard Alert, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				8.5
Less: funded commitments				0.0
Total unfunded commitments				8.5
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 8.5
Investment, Identifier [Axis]: Safe Home Security, Inc., Security Systems Inc., Safe Home Monitoring, Inc., National Protective Services, Inc., Bright Integrations LLC and Medguard Alert, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.63%	[2]	8.25%	[1]		11.63%	[2]	11.63%	[2]	11.63%	[2]	11.63%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 47.9	[3],[4]	$ 46.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		47.9	[3],[4]	46.2	[6],[7]
Investment, Identifier [Axis]: SageSure Holdings, LLC & Insight Catastrophe Group, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.5
Less: funded commitments		(5.9)
Total unfunded commitments		4.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 4.6
Investment, Identifier [Axis]: SageSure Holdings, LLC & Insight Catastrophe Group, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.14%					10.14%		10.14%		10.14%		10.14%
Total first lien senior secured loans	[3],[4]	$ 5.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 5.9
Investment, Identifier [Axis]: SageSure Holdings, LLC & Insight Catastrophe Group, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon	[2]	10.13%					10.13%		10.13%		10.13%		10.13%
Total first lien senior secured loans	[3],[4]	$ 14.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	13.9
Investment, Identifier [Axis]: SageSure Holdings, LLC & Insight Catastrophe Group, LLC, Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		16.0
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC and Landscape Parallel Partners, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 9.5
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC and Landscape Parallel Partners, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 5.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			5.8
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC, Tender Lawn Care ULC and Landscape Parallel Partners, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.6
Less: funded commitments		(0.2)
Total unfunded commitments		4.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.4
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC, Tender Lawn Care ULC and Landscape Parallel Partners, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 14.7
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC, Tender Lawn Care ULC and Landscape Parallel Partners, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.14%					10.14%		10.14%		10.14%		10.14%
Total first lien senior secured loans	[3],[4]	$ 0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.6
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services LLC, Tender Lawn Care ULC and Landscape Parallel Partners, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.14%					10.14%		10.14%		10.14%		10.14%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: Schill Landscaping and Lawn Care Services, LLC and Landscape Parallel Partners, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				5.1
Less: funded commitments				0.0
Total unfunded commitments				5.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 5.1
Investment, Identifier [Axis]: SelectQuote, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		12.42%	[2]	5.75%	[1]		12.42%	[2]	12.42%	[2]	12.42%	[2]	12.42%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 22.2	[3],[4]	$ 22.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		19.5	[3],[4]	22.6	[6],[7]
Investment, Identifier [Axis]: Senior Direct Lending Program, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		317.8		232.2
Redemptions (cost)		31.1		367.7
Sales (cost)		0.0		0.0
Interest income		146.3		138.0
Capital structuring service fees		16.9		18.6
Dividend income		0.0		0.0
Other income		5.5		3.8
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(25.3)		0.0
Fair Value		1,248.6		987.3
Investment, Identifier [Axis]: Senior Direct Lending Program, LLC, Member interest
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8]			$ 0.0
Investment, Identifier [Axis]: Senior Direct Lending Program, LLC, Membership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value	[5]	$ 0.0
Investment, Identifier [Axis]: Senior Direct Lending Program, LLC, Subordinated certificates
Schedule of Investments [Line Items]
Coupon | Rate		12.77%	[2]	8.21%	[1]		12.77%	[2]	12.77%	[2]	12.77%	[2]	12.77%	[2]	8.21%	[1]	8.21%	[1]	8.21%	[1]
Total first lien senior secured loans		$ 1,274.1	[5],[15]	$ 987.3	[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1,248.6	[5],[15]	987.3	[8]
Investment, Identifier [Axis]: Service Logic Acquisition, Inc. and MSHC, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.59%					9.59%		9.59%		9.59%		9.59%
Total first lien senior secured loans		$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1
Investment, Identifier [Axis]: Shermco Intermediate Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.0
Less: funded commitments		(2.7)
Total unfunded commitments		1.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.3
Investment, Identifier [Axis]: Shermco Intermediate Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.82%					10.82%		10.82%		10.82%		10.82%
Total first lien senior secured loans	[4]	$ 2.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	2.7
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		3.2		0.8
Redemptions (cost)		4.5		1.4
Sales (cost)		18.9		0.0
Interest income		0.8		1.4
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.1		0.0
Net realized gains (losses):		0.0		0.1
Net unrealized gains (losses):		3.0		4.3
Fair Value		6.0		23.1
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.5		2.5
Less: funded commitments		0.0		(1.2)
Total unfunded commitments		2.5		1.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.5		1.3
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.8	[4]	0.4	[7]
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, Class C preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.8	[4]	$ 0.4	[7]
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.84%	[2]	6.00%	[1]		9.84%	[2]	9.84%	[2]	9.84%	[2]	9.84%	[2]	6.00%	[1]	6.00%	[1]	6.00%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4],[13]	$ 19.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4],[13]	$ 19.1	[6],[7]
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.25%											7.25%		7.25%		7.25%
Total first lien senior secured loans	[6],[7],[14]			$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			$ 1.1
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7],[14]			$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			0.1
Investment, Identifier [Axis]: Shock Doctor, Inc. and Shock Doctor Holdings, LLC, Preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.3	[4]	2.0	[7]
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 8.9
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 27.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 27.0
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			1.0
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co Holdco, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.0		5.0
Less: funded commitments		(1.8)		(1.0)
Total unfunded commitments		3.2		4.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		3.2		4.0
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co Holdco, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 13.9
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co Holdco, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.90%					10.90%		10.90%		10.90%		10.90%
Total first lien senior secured loans	[3],[4]	$ 26.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 26.8
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co Holdco, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.90%					10.90%		10.90%		10.90%		10.90%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: Shur-Co Acquisition, Inc. and Shur-Co Holdco, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.59%					10.59%		10.59%		10.59%		10.59%
Total first lien senior secured loans	[3]	$ 1.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	1.8
Investment, Identifier [Axis]: SilverBow Resources, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5],[11]	28.7
Investment, Identifier [Axis]: Singer Sewing Company, SVP-Singer Holdings, LLC and SVP-Singer Holdings LP
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)				0.0
Redemptions (cost)				234.2
Sales (cost)				0.0
Interest income				25.4
Capital structuring service fees				1.9
Dividend income				6.7
Other income				0.5
Net realized gains (losses):				109.7
Net unrealized gains (losses):				(87.8)
Fair Value				0.0
Investment, Identifier [Axis]: SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.1		7.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		7.1		7.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		7.1		7.1
Investment, Identifier [Axis]: SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.2	[4]	$ 0.7	[7]
Investment, Identifier [Axis]: SiroMed Physician Services, Inc. and SiroMed Equity Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.48%	[2]	5.75%	[1]		9.48%	[2]	9.48%	[2]	9.48%	[2]	9.48%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 10.3	[3],[4]	$ 11.5	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		10.3	[3],[4]	9.9	[6]
Investment, Identifier [Axis]: Smarsh Inc. and Skywalker TopCo, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.0
Less: funded commitments		0.0
Total unfunded commitments		2.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.0
Investment, Identifier [Axis]: Smarsh Inc. and Skywalker TopCo, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 8.6
Investment, Identifier [Axis]: Smarsh Inc. and Skywalker TopCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.29%					11.29%		11.29%		11.29%		11.29%
Total first lien senior secured loans	[3],[4]	$ 11.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	11.9
Investment, Identifier [Axis]: Smarsh Inc., MobileGuard, LLC, Actiance, Inc. and Skywalker TopCo, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 5.1
Investment, Identifier [Axis]: Smarsh Inc., MobileGuard, LLC, Actiance, Inc. and Skywalker TopCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.25%											9.25%		9.25%		9.25%
Total first lien senior secured loans	[6],[7]			$ 13.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			13.3
Investment, Identifier [Axis]: SocialFlow, Inc., Warrant to purchase shares of Series C preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		$ 0.0	[7]
Investment, Identifier [Axis]: Sophia, L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.73%	[2]	9.00%	[1]		12.73%	[2]	12.73%	[2]	12.73%	[2]	12.73%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 105.9	[3],[4]	$ 105.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		103.8	[3],[4]	105.9	[6],[7]
Investment, Identifier [Axis]: SoundCloud Limited, Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.7	[4],[5]	0.7	[7],[8]
Investment, Identifier [Axis]: Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.7
Less: funded commitments		0.0
Total unfunded commitments		1.7
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.7
Investment, Identifier [Axis]: Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.18%					11.18%		11.18%		11.18%		11.18%
Total first lien senior secured loans	[3],[4]	$ 2.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	2.5
Investment, Identifier [Axis]: Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp, Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 10.5
Investment, Identifier [Axis]: Spring Insurance Solutions, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				5.6
Less: funded commitments				0.0
Total unfunded commitments				5.6
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 5.6
Investment, Identifier [Axis]: Spring Insurance Solutions, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.23%	[2]	7.50%	[1]		11.23%	[2]	11.23%	[2]	11.23%	[2]	11.23%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 22.0	[3],[4]	$ 19.7	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 19.6	[3],[4]	$ 18.9	[6]
Investment, Identifier [Axis]: Stamps.com Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.50%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 146.8	[3],[4]	$ 197.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		140.9	[3],[4]	193.9	[6],[7]
Investment, Identifier [Axis]: Star US Bidco LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.5		8.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		8.5		8.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.5		8.5
Investment, Identifier [Axis]: Startec Equity, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		0.0		0.0
Fair Value		0.0		0.0
Investment, Identifier [Axis]: Startec Equity, LLC, Member interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		0.0
Investment, Identifier [Axis]: Stealth Holding LLC and UCIT Online Security Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				2.9
Less: funded commitments				0.0
Total unfunded commitments				2.9
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 2.9
Investment, Identifier [Axis]: Stealth Holding LLC and UCIT Online Security Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.54%	[2]	7.75%	[1]		10.54%	[2]	10.54%	[2]	10.54%	[2]	10.54%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 51.3	[3],[4],[5]	$ 50.5	[6],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 50.3	[3],[4],[5]	$ 50.5	[6],[8]
Investment, Identifier [Axis]: Stealth Holding LLC and UCIT Online Security Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.08%	[2]	9.00%	[1]		11.08%	[2]	11.08%	[2]	11.08%	[2]	11.08%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 5.2	[3],[4],[5]	$ 0.8	[6],[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.1	[3],[4],[5]	0.8	[6],[7],[8]
Investment, Identifier [Axis]: Stealth Holding LLC and UCIT Online Security Inc., First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.75%					13.75%		13.75%		13.75%		13.75%
Total first lien senior secured loans	[3],[4],[5]	$ 2.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	2.4
Investment, Identifier [Axis]: Storable, Inc. and EQT IX Co-Investment (E) SCSP, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 7.0	[4],[5]	$ 6.8	[7],[8]
Investment, Identifier [Axis]: Storable, Inc. and EQT IX Co-Investment (E) SCSP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.54%	[2]	7.50%	[1]		11.54%	[2]	11.54%	[2]	11.54%	[2]	11.54%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 42.8	[3],[4]	$ 42.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 41.1	[3],[4]	42.8	[6],[7]
Investment, Identifier [Axis]: Storable, Inc. and EQT IX Co-Investment (E) SCSP, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.54%					11.54%		11.54%		11.54%		11.54%
Total first lien senior secured loans	[3],[4]	$ 10.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	9.9
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class A redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class B redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class C redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class D redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class E redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class F redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class G redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class H redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.2	[4],[5]	1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Class I redeemable shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.2	[4],[5]	$ 1.5	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		375.00%	[2]	3.88%	[1]		375.00%	[2]	375.00%	[2]	375.00%	[2]	375.00%	[2]	3.88%	[1]	3.88%	[1]	3.88%	[1]
Total first lien senior secured loans		$ 66.0	[4],[5]	$ 70.2	[7],[8]
Investments Activity And Fair Value Table [Abstract]
Fair Value		66.0	[4],[5]	70.3	[7],[8]
Investment, Identifier [Axis]: Storm Investment S.a.r.l., Ordinary shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[4],[5]	0.0	[7],[8]
Investment, Identifier [Axis]: Sun Acquirer Corp. and Sun TopCo, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		21.6		26.8
Less: funded commitments		(0.4)		0.0
Total unfunded commitments		21.2		26.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		21.2		26.8
Investment, Identifier [Axis]: Sun Acquirer Corp. and Sun TopCo, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.3	[4]	$ 9.2	[7]
Investment, Identifier [Axis]: Sun Acquirer Corp. and Sun TopCo, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.50%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 52.0	[3],[4]	$ 17.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 50.4	[3],[4]	$ 17.2	[6],[7]
Investment, Identifier [Axis]: Sun Acquirer Corp. and Sun TopCo, LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.50%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 5.3	[3],[4]	$ 74.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.2	[3],[4]	73.7	[6],[7]
Investment, Identifier [Axis]: Sun Acquirer Corp. and Sun TopCo, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4],[13]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	0.0
Investment, Identifier [Axis]: Sundance Energy Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		41.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.0		0.0
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		(22.6)		0.0
Net unrealized gains (losses):		1.2		(1.1)
Fair Value		0.0		68.6
Investment, Identifier [Axis]: Sundance Energy Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			68.6
Investment, Identifier [Axis]: Sundance Group Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.0		7.6
Less: funded commitments		0.0		(0.9)
Total unfunded commitments		3.0		6.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.0		$ 6.7
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.75%											7.75%		7.75%		7.75%
Total first lien senior secured loans	[6],[7]			$ 15.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 15.3
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.75%					10.75%		10.75%		10.75%		10.75%
Total first lien senior secured loans	[3],[4]	$ 20.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 19.9
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.93%					10.93%		10.93%		10.93%		10.93%
Total first lien senior secured loans	[3],[4]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.8
Investment, Identifier [Axis]: Sundance Group Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.75%											7.75%		7.75%		7.75%
Total first lien senior secured loans	[6],[7]			$ 0.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			0.9
Investment, Identifier [Axis]: Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation, Diecast Beacon
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.0		7.5
Less: funded commitments		(0.6)		(0.6)
Total unfunded commitments		5.4		6.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		5.4		$ 6.9
Investment, Identifier [Axis]: Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation, Diecast Beacon, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[15]	$ 0.0	[16]
Investment, Identifier [Axis]: Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		3.61%	[2]	3.61%	[1]		3.61%	[2]	3.61%	[2]	3.61%	[2]	3.61%	[2]	3.61%	[1]	3.61%	[1]	3.61%	[1]
Total first lien senior secured loans		$ 0.1	[4]	$ 0.1	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[4]	$ 0.1	[7]
Investment, Identifier [Axis]: Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon		11.16%	[2]	8.75%	[1]		11.16%	[2]	11.16%	[2]	11.16%	[2]	11.16%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 147.9	[3],[4]	$ 142.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		136.1	[3],[4]	$ 142.5	[6],[7]
Investment, Identifier [Axis]: Sunrun Luna Holdco 2021, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		75.0
Less: funded commitments		(40.7)
Total unfunded commitments		34.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 34.3
Investment, Identifier [Axis]: Sunrun Luna Holdco 2021, LLC, Senior subordinated revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.86%					7.86%		7.86%		7.86%		7.86%
Total first lien senior secured loans	[4],[5]	$ 24.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 24.2
Investment, Identifier [Axis]: Sunrun Luna Holdco 2021, LLC, Senior subordinated revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.95%					8.95%		8.95%		8.95%		8.95%
Total first lien senior secured loans	[4],[5]	$ 16.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	$ 16.1
Investment, Identifier [Axis]: Sunrun Xanadu Issuer 2019-1, LLC and Sunrun Xanadu Holdings 2019-1, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		3.98%	[2]	3.98%	[1]		3.98%	[2]	3.98%	[2]	3.98%	[2]	3.98%	[2]	3.98%	[1]	3.98%	[1]	3.98%	[1]
Total first lien senior secured loans		$ 0.3	[4]	$ 0.4	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.3	[4]	$ 0.4	[7]
Investment, Identifier [Axis]: Sunrun Xanadu Issuer 2019-1, LLC and Sunrun Xanadu Holdings 2019-1, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon		10.00%	[2]	8.75%	[1]		10.00%	[2]	10.00%	[2]	10.00%	[2]	10.00%	[2]	8.75%	[1]	8.75%	[1]	8.75%	[1]
Total first lien senior secured loans		$ 72.5	[3],[4]	$ 69.3
Investments Activity And Fair Value Table [Abstract]
Fair Value		67.3	[3],[4]	69.3
Investment, Identifier [Axis]: Sunshine Sub, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				5.8
Less: funded commitments				0.0
Total unfunded commitments				5.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				5.8
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.0		7.0
Less: funded commitments		(3.1)		0.0
Total unfunded commitments		3.9		7.0
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.9		$ 7.0
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.69%					8.69%		8.69%		8.69%		8.69%
Total first lien senior secured loans	[3],[4]	$ 12.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 10.5
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.25%					10.25%		10.25%		10.25%		10.25%
Total first lien senior secured loans	[4]	$ 3.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 2.6
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.07%	[2]	8.63%	[1]		12.07%	[2]	12.07%	[2]	12.07%	[2]	12.07%	[2]	8.63%	[1]	8.63%	[1]	8.63%	[1]
Total first lien senior secured loans		$ 76.2	[3],[4]	$ 69.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		64.8	[3],[4]	69.9	[6],[7]
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., Series C-1 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		73.1	[4]	85.0	[7]
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., Series C-2 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		36.6	[4]	42.6	[7]
Investment, Identifier [Axis]: Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc., Series C-3 preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		14.3	[4]	16.6	[7]
Investment, Identifier [Axis]: Synergy HomeCare Franchising, LLC and NP/Synergy Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.2		4.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		4.2		4.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		4.2		4.2
Investment, Identifier [Axis]: Synergy HomeCare Franchising, LLC and NP/Synergy Holdings, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.0		$ 1.0
Investment, Identifier [Axis]: Synergy HomeCare Franchising, LLC and NP/Synergy Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 13.1	[3],[4]	$ 15.3	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		13.1	[3],[4]	15.3	[6]
Investment, Identifier [Axis]: TA/WEG Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.0		9.3
Less: funded commitments		0.0		(0.8)
Total unfunded commitments		2.0		8.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 2.0		$ 8.5
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 0.1
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.98%					9.98%		9.98%		9.98%		9.98%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.41%	[2]	6.75%	[1]		9.41%	[2]	9.41%	[2]	9.41%	[2]	9.41%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.75%	[2]	6.75%	[1]		10.75%	[2]	10.75%	[2]	10.75%	[2]	10.75%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate		10.46%	[2]	6.75%	[1]		10.46%	[2]	10.46%	[2]	10.46%	[2]	10.46%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 8.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	$ 8.3	[6],[7]
Investment, Identifier [Axis]: TA/WEG Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7],[14]			$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			0.8
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.3		5.3
Less: funded commitments		(0.1)		0.0
Total unfunded commitments		0.2		5.3
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2		$ 5.3
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 6.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 6.6
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.98%					9.98%		9.98%		9.98%		9.98%
Total first lien senior secured loans	[3],[4]	$ 34.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 34.4
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.50%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 6.5	[3],[4]	$ 4.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 6.5	[3],[4]	$ 4.0	[6],[7]
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 34.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			34.8
Investment, Identifier [Axis]: TCP Hawker Intermediate LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.57%					9.57%		9.57%		9.57%		9.57%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: THG Acquisition, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		18.2		34.8
Less: funded commitments		0.0		0.0
Total unfunded commitments		18.2		34.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 18.2		$ 34.8
Investment, Identifier [Axis]: THG Acquisition, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.88%	[2]	6.25%	[1]		9.88%	[2]	9.88%	[2]	9.88%	[2]	9.88%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 17.0		$ 0.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 16.7	[15]	$ 0.6	[6],[7]
Investment, Identifier [Axis]: THG Acquisition, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.75%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 14.9	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.7	[3],[4]	$ 0.1	[6],[7]
Investment, Identifier [Axis]: THG Acquisition, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.50%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 23.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	$ 23.2	[6],[7]
Investment, Identifier [Axis]: THG Acquisition, LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6]			$ 14.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 14.9
Investment, Identifier [Axis]: THG Acquisition, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		7.5
Less: funded commitments		(1.3)
Total unfunded commitments		6.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		6.2
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C., Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.9
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3]	$ 35.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 35.1
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.17%					10.17%		10.17%		10.17%		10.17%
Total first lien senior secured loans	[3]	$ 1.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	1.3
Investment, Identifier [Axis]: Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.7		1.9
Less: funded commitments		(0.8)		(0.5)
Total unfunded commitments		0.9		1.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		(0.3)
Total net adjusted unfunded revolving and delayed draw commitments		0.9		1.1
Investment, Identifier [Axis]: Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.6		$ 2.0
Investment, Identifier [Axis]: Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		8.92%	[2]	6.25%	[1]		8.92%	[2]	8.92%	[2]	8.92%	[2]	8.92%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 1.4	[3],[4]	$ 1.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.4	[3],[4]	$ 1.1	[6],[7]
Investment, Identifier [Axis]: Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon		9.51%	[2]	6.75%	[1]		9.51%	[2]	9.51%	[2]	9.51%	[2]	9.51%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.4	[3],[4]	$ 0.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.4	[3],[4]	$ 0.5	[6],[7]
Investment, Identifier [Axis]: Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P., First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon	[2]	10.05%					10.05%		10.05%		10.05%		10.05%
Total first lien senior secured loans	[3],[4]	$ 0.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.4
Investment, Identifier [Axis]: Teasdale Foods, Inc. and Familia Group Holdings Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		12.29%	[2]	8.00%	[1]		12.29%	[2]	12.29%	[2]	12.29%	[2]	12.29%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 75.9	[3],[4]	$ 78.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		65.3	[3],[4]	73.6	[6],[7]
Investment, Identifier [Axis]: Teasdale Foods, Inc. and Familia Group Holdings Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Teasdale Foods, Inc. and Familia Group Holdings Inc., Warrant to purchase up to 57,827 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0
Investment, Identifier [Axis]: Teligent, Inc, Second lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			8.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			8.8
Investment, Identifier [Axis]: Teligent, Inc, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			1.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			0.5
Investment, Identifier [Axis]: Teligent, Inc, Second lien senior secured loan 3
Schedule of Investments [Line Items]
Total first lien senior secured loans	[7],[10]			77.8
Participating interest sold				0.6
Secured borrowings				0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[10]			$ 29.5
Investment, Identifier [Axis]: Teligent, Inc, Second lien senior secured loan 3, Secured borrowing
Schedule of Investments [Line Items]
Coupon | Rate				14.50%											14.50%		14.50%		14.50%
Investment, Identifier [Axis]: Teligent, Inc, Series D preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			$ 0.0
Investment, Identifier [Axis]: Teligent, Inc, Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Teligent, Inc, Warrant to purchase shares of common stock 2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Teligent, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				3.4
Less: funded commitments				0.0
Total unfunded commitments				3.4
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				(3.4)
Total net adjusted unfunded revolving and delayed draw commitments				0.0
Investment, Identifier [Axis]: Tempus Labs, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.49%					10.49%		10.49%		10.49%		10.49%
Total first lien senior secured loans	[3],[4]	$ 71.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	69.6
Investment, Identifier [Axis]: TerSera Therapeutics LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.1		$ 0.1
Investment, Identifier [Axis]: TerSera Therapeutics LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.60%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.60%	[1]	6.60%	[1]	6.60%	[1]
Total first lien senior secured loans		$ 5.0	[3],[4]	$ 5.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.0	[3],[4]	$ 5.1	[6]
Investment, Identifier [Axis]: TerSera Therapeutics LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.60%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.60%	[1]	6.60%	[1]	6.60%	[1]
Total first lien senior secured loans		$ 2.0	[3],[4]	$ 2.1	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 2.0	[3],[4]	$ 2.1	[6]
Investment, Identifier [Axis]: TerSera Therapeutics LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate		9.98%	[2]	6.60%	[1]		9.98%	[2]	9.98%	[2]	9.98%	[2]	9.98%	[2]	6.60%	[1]	6.60%	[1]	6.60%	[1]
Total first lien senior secured loans		$ 1.8	[3],[4]	$ 1.8	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.8	[3],[4]	$ 1.8	[6]
Investment, Identifier [Axis]: TerSera Therapeutics LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: The Alaska Club Partners, LLC, Athletic Club Partners LLC and The Alaska Club, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.1		1.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		1.1		1.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 1.1		$ 1.1
Investment, Identifier [Axis]: The Alaska Club Partners, LLC, Athletic Club Partners LLC and The Alaska Club, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		14.00%	[2]	10.25%	[1]		14.00%	[2]	14.00%	[2]	14.00%	[2]	14.00%	[2]	10.25%	[1]	10.25%	[1]	10.25%	[1]
Total first lien senior secured loans		$ 12.5	[3],[4]	$ 15.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		12.5	[3],[4]	14.1	[6],[7]
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		12.6		29.5
Less: funded commitments		(11.5)		(2.0)
Total unfunded commitments		1.1		27.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.1		27.5
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.5		$ 4.9
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.57%	[2]	6.75%	[1]		9.57%	[2]	9.57%	[2]	9.57%	[2]	9.57%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 47.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.2	[3],[4]	$ 46.7	[6],[7]
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.08%					11.08%		11.08%		11.08%		11.08%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		10.10%	[2]	8.25%	[1]		10.10%	[2]	10.10%	[2]	10.10%	[2]	10.10%	[2]	8.25%	[1]	8.25%	[1]	8.25%	[1]
Total first lien senior secured loans		$ 8.9	[3],[4]	$ 2.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.8	[3],[4]	2.0	[6],[7]
Investment, Identifier [Axis]: The Arcticom Group, LLC and AMCP Mechanical Holdings, LP, First lien senior secured revolving loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.50%					12.50%		12.50%		12.50%		12.50%
Total first lien senior secured loans	[3],[4]	$ 2.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 2.5
Investment, Identifier [Axis]: The Edelman Financial Center, LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.13%					11.13%		11.13%		11.13%		11.13%
Total first lien senior secured loans	[4],[5]	$ 13.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	12.0
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		1.7
Less: funded commitments		(0.1)
Total unfunded commitments		1.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		1.6
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[5]	$ 0.0
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.51%					10.51%		10.51%		10.51%		10.51%
Total first lien senior secured loans	[3],[4],[5]	$ 3.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 3.4
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.00%					12.00%		12.00%		12.00%		12.00%
Total first lien senior secured loans	[3],[4],[5]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	0.1
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[4],[5]	3.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	2.9
Investment, Identifier [Axis]: The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC, Series A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	4.8
Investment, Identifier [Axis]: The NPD Group, L.P., IRI Group Holdings, Inc., Information Resources, Inc. and IRI-NPD Co-Invest Aggregator, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		14.4
Less: funded commitments		(1.8)
Total unfunded commitments		12.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		12.6
Investment, Identifier [Axis]: The NPD Group, L.P., IRI Group Holdings, Inc., Information Resources, Inc. and IRI-NPD Co-Invest Aggregator, L.P., Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 15.7
Investment, Identifier [Axis]: The NPD Group, L.P., IRI Group Holdings, Inc., Information Resources, Inc. and IRI-NPD Co-Invest Aggregator, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon	[2]	10.43%					10.43%		10.43%		10.43%		10.43%
Total first lien senior secured loans	[3],[4]	$ 213.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 209.3
Investment, Identifier [Axis]: The NPD Group, L.P., IRI Group Holdings, Inc., Information Resources, Inc. and IRI-NPD Co-Invest Aggregator, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.07%					10.07%		10.07%		10.07%		10.07%
Total first lien senior secured loans	[3],[4]	$ 1.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.7
Investment, Identifier [Axis]: The Teaching Company Holdings, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		1.2	[7]
Investment, Identifier [Axis]: The Teaching Company Holdings, Inc., Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.5	[4]	2.9	[7]
Investment, Identifier [Axis]: The Ultimate Software Group, Inc. and H&F Unite Partners, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				10.0
Less: funded commitments				(0.1)
Total unfunded commitments				9.9
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 9.9
Investment, Identifier [Axis]: The Ultimate Software Group, Inc. and H&F Unite Partners, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8],[16]			$ 0.0
Investment, Identifier [Axis]: The Ultimate Software Group, Inc. and H&F Unite Partners, L.P., Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7],[8]			15.1
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		6.9		6.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		6.9		6.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		6.9		6.9
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		3.1		1.9
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP, Class A units 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP, Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0		0.0
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP, Class B units 2
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0		$ 0.0
Investment, Identifier [Axis]: The Ultimus Group Midco, LLC, The Ultimus Group, LLC, and The Ultimus Group Aggregator, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.23%	[2]	5.75%	[1]		9.23%	[2]	9.23%	[2]	9.23%	[2]	9.23%	[2]	5.75%	[1]	5.75%	[1]	5.75%	[1]
Total first lien senior secured loans		$ 37.4	[3],[4]	$ 37.8	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 36.7	[3],[4]	37.8	[6]
Investment, Identifier [Axis]: Therapy Brands Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				8.6
Less: funded commitments				0.0
Total unfunded commitments				8.6
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 8.6
Investment, Identifier [Axis]: Therapy Brands Holdings LLC, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.10%	[2]	7.50%	[1]		11.10%	[2]	11.10%	[2]	11.10%	[2]	11.10%	[2]	7.50%	[1]	7.50%	[1]	7.50%	[1]
Total first lien senior secured loans		$ 29.1	[3],[4]	$ 20.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		27.9	[3],[4]	20.5	[6],[7]
Investment, Identifier [Axis]: Thermostat Purchaser III, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		11.7		11.7
Less: funded commitments		0.0		0.0
Total unfunded commitments		11.7		11.7
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 11.7		$ 11.7
Investment, Identifier [Axis]: Thermostat Purchaser III, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.98%	[2]	8.00%	[1]		11.98%	[2]	11.98%	[2]	11.98%	[2]	11.98%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 23.0	[3],[4]	$ 23.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		22.1	[3],[4]	22.8	[6],[7]
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		19.0
Less: funded commitments		0.0
Total unfunded commitments		19.0
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 19.0
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P., First lien secured notes
Schedule of Investments [Line Items]
Coupon | Rate	[2]	650.00%					650.00%		650.00%		650.00%		650.00%
Total first lien senior secured loans	[4],[11]	$ 88.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	$ 74.9
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.18%					9.18%		9.18%		9.18%		9.18%
Total first lien senior secured loans	[3],[4],[11]	$ 10.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	9.7
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P., Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 10.7
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.00%					9.00%		9.00%		9.00%		9.00%
Total first lien senior secured loans	[3],[4]	$ 85.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	69.9
Investment, Identifier [Axis]: TibCo Software Inc., Picard Parent, Inc., Picard MidCo, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P., Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	143.1
Investment, Identifier [Axis]: Top Five Largest Portfolio Company Investments | Senior Direct Lending Program
Schedule of Investments [Line Items]
Total first lien senior secured loans		1,631.0		1,540.0
Investment, Identifier [Axis]: Totes Isotoner Corporation and Totes Ultimate Holdco, Inc.
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		0.0		0.0
Redemptions (cost)		0.0		0.0
Sales (cost)		0.0		0.0
Interest income		0.3		0.3
Capital structuring service fees		0.0		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		(0.2)		(1.5)
Fair Value		3.7		3.9
Investment, Identifier [Axis]: Totes Isotoner Corporation and Totes Ultimate Holdco, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.2		$ 0.4	[7]
Investment, Identifier [Axis]: Totes Isotoner Corporation and Totes Ultimate Holdco, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.38%	[2]	7.00%	[1]		10.38%	[2]	10.38%	[2]	10.38%	[2]	10.38%	[2]	7.00%	[1]	7.00%	[1]	7.00%	[1]
Total first lien senior secured loans		$ 2.2	[3],[4]	$ 2.2	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.9	[3],[4]	$ 1.9	[6],[7]
Investment, Identifier [Axis]: Totes Isotoner Corporation and Totes Ultimate Holdco, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		8.38%	[2]	5.00%	[1]		8.38%	[2]	8.38%	[2]	8.38%	[2]	8.38%	[2]	5.00%	[1]	5.00%	[1]	5.00%	[1]
Total first lien senior secured loans		$ 1.6	[3],[4]	$ 1.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		1.6	[3],[4]	1.6	[6],[7]
Investment, Identifier [Axis]: Touchstone Acquisition, Inc. and Touchstone Holding, L.P., Class A preferred units
Investments Activity And Fair Value Table [Abstract]
Fair Value		2.1	[4]	$ 2.8	[7]
Investment, Identifier [Axis]: Trader Corporation and Project Auto Finco Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.6
Less: funded commitments		0.0
Total unfunded commitments		3.6
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.6
Investment, Identifier [Axis]: Trader Corporation and Project Auto Finco Corp.., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.40%					11.40%		11.40%		11.40%		11.40%
Total first lien senior secured loans	[3],[4],[5]	$ 12.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	$ 11.9
Investment, Identifier [Axis]: Triton Water Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		8.23%	[2]	4.00%	[1]		8.23%	[2]	8.23%	[2]	8.23%	[2]	8.23%	[2]	4.00%	[1]	4.00%	[1]	4.00%	[1]
Total first lien senior secured loans		$ 1.0	[3],[4],[11]	$ 1.0	[6],[7],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.9	[3],[4],[11]	$ 1.0	[6],[7],[12]
Investment, Identifier [Axis]: Triton Water Holdings, Inc., Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate		625.00%	[2]	6.25%	[1]		625.00%	[2]	625.00%	[2]	625.00%	[2]	625.00%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 0.1	[4],[11]	$ 0.1	[7],[12]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[4],[11]	0.1	[7],[12]
Investment, Identifier [Axis]: Two Six Labs, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		10.3
Less: funded commitments		0.0
Total unfunded commitments		10.3
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		10.3
Investment, Identifier [Axis]: Tyden Group Holding Corp., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8]			3.9
Investment, Identifier [Axis]: Tyden Group Holding Corp., Preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[8]			0.4
Investment, Identifier [Axis]: U.S. Anesthesia Partners, Inc. & U.S. Anesthesia Partners Holdings, Inc., Common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 12.7	[4]	$ 12.9	[7]
Investment, Identifier [Axis]: U.S. Anesthesia Partners, Inc. & U.S. Anesthesia Partners Holdings, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.62%	[2]	8.00%	[1]		11.62%	[2]	11.62%	[2]	11.62%	[2]	11.62%	[2]	8.00%	[1]	8.00%	[1]	8.00%	[1]
Total first lien senior secured loans		$ 147.8	[3],[4]	$ 147.8	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		143.3	[3],[4]	146.3	[6],[7]
Investment, Identifier [Axis]: UKG Inc. and H&F Unite Partners, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		25.0
Less: funded commitments		(10.8)
Total unfunded commitments		14.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 14.2
Investment, Identifier [Axis]: UKG Inc. and H&F Unite Partners, L.P., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.06%					8.06%		8.06%		8.06%		8.06%
Total first lien senior secured loans	[4],[5],[13]	$ 10.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5],[13]	10.6
Investment, Identifier [Axis]: UKG Inc. and H&F Unite Partners, L.P., Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[5]	14.4
Investment, Identifier [Axis]: US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		9.9		9.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		9.9		9.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 9.9		$ 9.9
Investment, Identifier [Axis]: US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 26.4	[3],[4]	$ 40.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		25.3	[3],[4]	39.7	[6],[7]
Investment, Identifier [Axis]: US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P., Limited partner interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.5	[4]	0.8	[7]
Investment, Identifier [Axis]: United Digestive MSO Parent, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		18.4		8.4
Less: funded commitments		0.0		0.0
Total unfunded commitments		18.4		8.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 18.4		8.4
Investment, Identifier [Axis]: United Digestive MSO Parent, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.38%					9.38%		9.38%		9.38%		9.38%
Total first lien senior secured loans	[3],[4]	$ 1.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.0
Investment, Identifier [Axis]: VCP-EDC Co-Invest, LLC, Membership units
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.2		0.4
Investment, Identifier [Axis]: VLS Recovery Services, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				23.8
Less: funded commitments				(1.5)
Total unfunded commitments				22.3
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 22.3
Investment, Identifier [Axis]: VLS Recovery Services, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 8.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 8.8
Investment, Identifier [Axis]: VLS Recovery Services, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7]			$ 5.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 5.2
Investment, Identifier [Axis]: VLS Recovery Services, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.50%											6.50%		6.50%		6.50%
Total first lien senior secured loans	[6],[7],[14]			$ 1.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7],[14]			1.3
Investment, Identifier [Axis]: VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.7		6.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		8.7		6.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.7		6.2
Investment, Identifier [Axis]: VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P., Class A-2 units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.6	[4]	$ 7.5	[7]
Investment, Identifier [Axis]: VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			6.75%											6.75%		6.75%		6.75%
Total first lien senior secured loans	[6],[7]			$ 6.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			6.4
Investment, Identifier [Axis]: VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P., First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.60%					10.60%		10.60%		10.60%		10.60%
Total first lien senior secured loans	[3],[13]	$ 6.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[13]	$ 6.0
Investment, Identifier [Axis]: VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.52%					10.52%		10.52%		10.52%		10.52%
Total first lien senior secured loans	[3],[4]	$ 3.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	3.1
Investment, Identifier [Axis]: VPROP Operating, LLC and V SandCo, LLC
Investments Activity And Fair Value Table [Abstract]
Purchases (cost)		6.0		0.9
Redemptions (cost)		4.5		0.0
Sales (cost)		0.0		0.0
Interest income		5.0		4.0
Capital structuring service fees		0.2		0.0
Dividend income		0.0		0.0
Other income		0.0		0.0
Net realized gains (losses):		0.0		0.0
Net unrealized gains (losses):		33.5		5.4
Fair Value		116.1		77.5
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				7.1
Less: funded commitments				0.0
Total unfunded commitments				7.1
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				7.1
Investment, Identifier [Axis]: VPROP Operating, LLC and V SandCo, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 73.4	[4]	39.9	[7]
Investment, Identifier [Axis]: VPROP Operating, LLC and V SandCo, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.62%					13.62%		13.62%		13.62%		13.62%
Total first lien senior secured loans		$ 27.3	[3],[4]	7.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 27.3	[3],[4]	7.0	[6],[7]
Investment, Identifier [Axis]: VPROP Operating, LLC and V SandCo, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.62%					13.62%		13.62%		13.62%		13.62%
Total first lien senior secured loans		$ 9.4	[3],[4]	5.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 9.4	[3],[4]	5.5	[6],[7]
Investment, Identifier [Axis]: VPROP Operating, LLC and V SandCo, LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	13.62%					13.62%		13.62%		13.62%		13.62%
Total first lien senior secured loans		$ 6.0	[3],[4]	25.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		6.0	[3],[4]	25.1	[6],[7]
Investment, Identifier [Axis]: VRC Companies, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.4
Less: funded commitments		0.0
Total unfunded commitments		5.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 5.4
Investment, Identifier [Axis]: VRC Companies, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.97%					10.97%		10.97%		10.97%		10.97%
Total first lien senior secured loans	[3]	$ 0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3]	$ 0.0
Investment, Identifier [Axis]: VRC Companies, LLC, Senior subordinated loan
Schedule of Investments [Line Items]
Coupon	[2]	12.00%					12.00%		12.00%		12.00%		12.00%
Total first lien senior secured loans	[4]	$ 5.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	4.7
Investment, Identifier [Axis]: VS Buyer, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.1		8.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		8.1		8.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.1		8.1
Investment, Identifier [Axis]: VSC Investors LLC, Membership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.5	[4],[5],[11]	0.6	[7],[8],[12]
Investment, Identifier [Axis]: Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.0	[4]	$ 0.7	[7]
Investment, Identifier [Axis]: Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	7.88%					7.88%		7.88%		7.88%		7.88%
Total first lien senior secured loans	[3],[4],[11]	$ 14.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[11]	$ 14.2
Investment, Identifier [Axis]: Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		12.63%	[2]	9.25%	[1]		12.63%	[2]	12.63%	[2]	12.63%	[2]	12.63%	[2]	9.25%	[1]	9.25%	[1]	9.25%	[1]
Total first lien senior secured loans		$ 122.7	[3],[4]	$ 21.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 121.5	[3],[4]	$ 20.3	[6],[7]
Investment, Identifier [Axis]: Varsity Brands Holding Co., Inc. and BCPE Hercules Holdings, LP, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		12.63%	[2]	9.25%	[1]		12.63%	[2]	12.63%	[2]	12.63%	[2]	12.63%	[2]	9.25%	[1]	9.25%	[1]	9.25%	[1]
Total first lien senior secured loans		$ 21.1	[3],[4]	$ 122.7	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		20.9	[3],[4]	117.9	[6]
Investment, Identifier [Axis]: Verista, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.2
Less: funded commitments		(1.1)
Total unfunded commitments		7.1
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 7.1
Investment, Identifier [Axis]: Verista, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.19%					10.19%		10.19%		10.19%		10.19%
Total first lien senior secured loans	[3],[4]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.8
Investment, Identifier [Axis]: Verista, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.27%					10.27%		10.27%		10.27%		10.27%
Total first lien senior secured loans	[3],[4]	$ 1.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.1
Investment, Identifier [Axis]: Verscend Holding Corp.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		22.5		22.5
Less: funded commitments		0.0		(0.1)
Total unfunded commitments		22.5		22.4
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		22.5		$ 22.4
Investment, Identifier [Axis]: Verscend Holding Corp., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Vertice Pharma UK Parent Limited, Preferred shares
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.0	[5]	$ 0.0	[8]
Investment, Identifier [Axis]: Viant Medical Holdings, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	8.13%					8.13%		8.13%		8.13%		8.13%
Total first lien senior secured loans	[4],[11]	$ 3.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4],[11]	$ 2.8
Investment, Identifier [Axis]: Visual Edge Technology, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon		11.74%	[2]	9.75%	[1]		11.74%	[2]	11.74%	[2]	11.74%	[2]	11.74%	[2]	9.75%	[1]	9.75%	[1]	9.75%	[1]
Total first lien senior secured loans		$ 32.6	[3],[4]	$ 32.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		29.3	[3],[4]	30.9	[6],[7]
Investment, Identifier [Axis]: Visual Edge Technology, Inc., Senior subordinated loan
Schedule of Investments [Line Items]
Total first lien senior secured loans		103.8	[4],[9]	88.6	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		48.8	[4],[9]	79.7	[7]
Investment, Identifier [Axis]: Visual Edge Technology, Inc., Warrant to purchase shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[7]			0.0
Investment, Identifier [Axis]: Visual Edge Technology, Inc., Warrant to purchase up to 10,358,572 shares of common stock
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.0
Investment, Identifier [Axis]: WSHP FC Acquisition LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				10.3
Less: funded commitments				(1.5)
Total unfunded commitments				8.8
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				$ 8.8
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		35.4
Less: funded commitments		(9.6)
Total unfunded commitments		25.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		25.8
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, Common units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 4.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 33.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 32.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 14.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 14.2
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 11.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 11.0
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 10.7
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 10.5
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 5
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 4.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 4.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 6
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured loan 7
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.98%					10.98%		10.98%		10.98%		10.98%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: WSHP FC Acquisition LLC and WSHP FC Holdings LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.32%					10.32%		10.32%		10.32%		10.32%
Total first lien senior secured loans	[3],[4],[13]	$ 8.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	$ 8.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 4.9
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 4.9
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 33.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 33.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 4.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 4.5
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 11.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 11.4
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan 5
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6]			$ 10.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 10.8
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured loan 6
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 9.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 9.0
Investment, Identifier [Axis]: WSHP FC Acquisition LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			7.00%											7.00%		7.00%		7.00%
Total first lien senior secured loans	[6],[7]			$ 1.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 1.5
Investment, Identifier [Axis]: Walnut Parent, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.24%	[2]	6.50%	[1]		10.24%	[2]	10.24%	[2]	10.24%	[2]	10.24%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 14.7	[3],[4]	$ 14.9	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 14.2	[3],[4]	$ 14.9	[6]
Investment, Identifier [Axis]: Walnut Parent, Inc., First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.24%	[2]	6.50%	[1]		10.24%	[2]	10.24%	[2]	10.24%	[2]	10.24%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 19.9	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 19.9	[6],[7]
Investment, Identifier [Axis]: Wand Newco 3, Inc., Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.63%	[2]	7.43%	[1]		11.63%	[2]	11.63%	[2]	11.63%	[2]	11.63%	[2]	7.43%	[1]	7.43%	[1]	7.43%	[1]
Total first lien senior secured loans		$ 182.6	[4]	$ 180.2	[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 178.9	[4]	$ 180.2	[7]
Investment, Identifier [Axis]: Wash Encore Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.12%	[2]	6.75%	[1]		9.12%	[2]	9.12%	[2]	9.12%	[2]	9.12%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 98.5	[3],[4]	$ 135.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		96.5	[3],[4]	134.2	[6],[7]
Investment, Identifier [Axis]: Watchfire Enterprises, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments				2.0
Less: funded commitments				0.0
Total unfunded commitments				2.0
Less: commitments substantially at discretion of the Company				0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions				0.0
Total net adjusted unfunded revolving and delayed draw commitments				2.0
Investment, Identifier [Axis]: Watermill Express, LLC and Watermill Express Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.7		1.9
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.7		1.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		0.7		1.9
Investment, Identifier [Axis]: Watermill Express, LLC and Watermill Express Holdings, LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.2		$ 2.7
Investment, Identifier [Axis]: Watermill Express, LLC and Watermill Express Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.23%	[2]	6.25%	[1]		10.23%	[2]	10.23%	[2]	10.23%	[2]	10.23%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 20.4	[3],[4]	$ 19.4	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		20.4	[3],[4]	$ 19.4	[6]
Investment, Identifier [Axis]: Watermill Express, LLC and Watermill Express Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			0.00%											0.00%		0.00%		0.00%
Investments Activity And Fair Value Table [Abstract]
Fair Value	[16]			$ 0.0
Investment, Identifier [Axis]: Waverly Advisors, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.2
Less: funded commitments		0.0
Total unfunded commitments		0.2
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.2
Investment, Identifier [Axis]: Waverly Advisors, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.23%					10.23%		10.23%		10.23%		10.23%
Total first lien senior secured loans	[3],[4],[5]	$ 0.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[5]	0.6
Investment, Identifier [Axis]: WebPT, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.9		0.1
Less: funded commitments		(0.3)		0.0
Total unfunded commitments		0.6		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.6		$ 0.1
Investment, Identifier [Axis]: WebPT, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		11.48%	[2]	7.75%	[1]		11.48%	[2]	11.48%	[2]	11.48%	[2]	11.48%	[2]	7.75%	[1]	7.75%	[1]	7.75%	[1]
Total first lien senior secured loans		$ 48.1	[3],[4]	$ 48.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 48.1	[3],[4]	48.1	[6],[7]
Investment, Identifier [Axis]: WebPT, Inc., First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.26%					11.26%		11.26%		11.26%		11.26%
Total first lien senior secured loans	[3],[4]	$ 0.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.3
Investment, Identifier [Axis]: Wellness AcquisitionCo, Inc.
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		3.9		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		3.9		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.9		$ 0.1
Investment, Identifier [Axis]: Wellness AcquisitionCo, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.91%	[2]	6.50%	[1]		9.91%	[2]	9.91%	[2]	9.91%	[2]	9.91%	[2]	6.50%	[1]	6.50%	[1]	6.50%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 0.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.1	[3],[4]	0.1	[6],[7]
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		4.1		9.9
Less: funded commitments		(1.0)		0.0
Total unfunded commitments		3.1		9.9
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 3.1		$ 9.9
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 18.0	[3],[4]	$ 18.2	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 17.8	[3],[4]	$ 18.2	[6]
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.48%	[2]	6.75%	[1]		10.48%	[2]	10.48%	[2]	10.48%	[2]	10.48%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3],[4]	$ 9.5	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.2	[3],[4]	9.5	[6],[7]
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP, First lien senior secured loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.48%					10.48%		10.48%		10.48%		10.48%
Total first lien senior secured loans	[3],[4]	$ 0.2
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.2
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	10.09%					10.09%		10.09%		10.09%		10.09%
Total first lien senior secured loans	[3],[4],[13]	$ 0.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4],[13]	0.8
Investment, Identifier [Axis]: Wildcat BuyerCo, Inc. and Wildcat Parent, LP, Limited partnership interests
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 5.1	[4]	$ 2.8	[7]
Investment, Identifier [Axis]: Winebow Holdings, Inc. and The Vintner Group, Inc., First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.63%	[2]	7.25%	[1]		10.63%	[2]	10.63%	[2]	10.63%	[2]	10.63%	[2]	7.25%	[1]	7.25%	[1]	7.25%	[1]
Total first lien senior secured loans		$ 28.0	[3],[4]	$ 28.3	[6]
Investments Activity And Fair Value Table [Abstract]
Fair Value		27.5	[3],[4]	28.3	[6]
Investment, Identifier [Axis]: WorkWave Intermediate II, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		5.2		5.2
Less: funded commitments		0.0		0.0
Total unfunded commitments		5.2		5.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		5.2		5.2
Investment, Identifier [Axis]: WorkWave Intermediate II, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[6],[7]			61.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			61.6
Investment, Identifier [Axis]: WorkWave Intermediate II, LLC, First lien senior secured loan 1
Schedule of Investments [Line Items]
Total first lien senior secured loans	[3],[4]	67.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 67.4
Investment, Identifier [Axis]: WorkWave Intermediate II, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.44%					11.44%		11.44%		11.44%		11.44%
Total first lien senior secured loans	[3],[4]	$ 17.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	17.3
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		8.9		8.9
Less: funded commitments		(0.2)		(1.1)
Total unfunded commitments		8.7		7.8
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		8.7		7.8
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC, Class A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		4.2	[4]	4.2	[7]
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC, Class B units
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 1.1	[4]	$ 1.1	[7]
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.75%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 37.0	[3]	$ 16.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 36.6	[3]	$ 16.1	[6],[7]
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		10.13%	[2]	6.75%	[1]		10.13%	[2]	10.13%	[2]	10.13%	[2]	10.13%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.1	[3],[4]	$ 39.3	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 0.1	[3],[4]	$ 39.0	[6],[7]
Investment, Identifier [Axis]: XIFIN, Inc. and ACP Charger Co-Invest LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate		12.25%	[2]	6.75%	[1]		12.25%	[2]	12.25%	[2]	12.25%	[2]	12.25%	[2]	6.75%	[1]	6.75%	[1]	6.75%	[1]
Total first lien senior secured loans		$ 0.2	[3]	$ 1.1	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		0.2	[3]	1.1	[6],[7]
Investment, Identifier [Axis]: YE Brands Holdings, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.2		1.2
Less: funded commitments		(1.5)		0.0
Total unfunded commitments		0.7		1.2
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.7		$ 1.2
Investment, Identifier [Axis]: YE Brands Holdings, LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate		9.93%	[2]	6.25%	[1]		9.93%	[2]	9.93%	[2]	9.93%	[2]	9.93%	[2]	6.25%	[1]	6.25%	[1]	6.25%	[1]
Total first lien senior secured loans		$ 8.2	[3],[4]	$ 8.0	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 8.2	[3],[4]	$ 7.9	[6],[7]
Investment, Identifier [Axis]: YE Brands Holdings, LLC, First lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.68%					9.68%		9.68%		9.68%		9.68%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 0.1
Investment, Identifier [Axis]: YE Brands Holdings, LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.47%					9.47%		9.47%		9.47%		9.47%
Total first lien senior secured loans	[3],[4]	$ 1.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	1.5
Investment, Identifier [Axis]: ZB Holdco LLC & ZB Parent LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		21.5
Less: funded commitments		(0.1)
Total unfunded commitments		21.4
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 21.4
Investment, Identifier [Axis]: ZB Holdco LLC & ZB Parent LLC, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	9.48%					9.48%		9.48%		9.48%		9.48%
Total first lien senior secured loans	[3],[4]	$ 0.1
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	0.1
Investment, Identifier [Axis]: ZB Holdco LLC & ZB Parent LLC, First lien senior secured revolving loan
Schedule of Investments [Line Items]
Total first lien senior secured loans	[15]	0.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[15]	0.0
Investment, Identifier [Axis]: ZB Holdco LLC & ZB Parent LLC, Series A units
Investments Activity And Fair Value Table [Abstract]
Fair Value		5.5
Investment, Identifier [Axis]: ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		16.8
Less: funded commitments		0.0
Total unfunded commitments		16.8
Less: commitments substantially at discretion of the Company		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0
Total net adjusted unfunded revolving and delayed draw commitments		16.8
Investment, Identifier [Axis]: ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP, Class A common units
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 2.7
Investment, Identifier [Axis]: ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP, First lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.04%					11.04%		11.04%		11.04%		11.04%
Total first lien senior secured loans	[3],[4]	$ 42.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	41.6
Investment, Identifier [Axis]: ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP, Series A preferred stock
Investments Activity And Fair Value Table [Abstract]
Fair Value	[4]	$ 26.8
Investment, Identifier [Axis]: eCapital Finance Corp., Senior subordinated loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			9.00%											9.00%		9.00%		9.00%
Total first lien senior secured loans	[6],[7]			$ 56.0
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6],[7]			$ 56.0
Investment, Identifier [Axis]: eCapital Finance Corp., Senior subordinated loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.97%					11.97%		11.97%		11.97%		11.97%
Total first lien senior secured loans	[3],[4]	$ 55.8
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 55.2
Investment, Identifier [Axis]: eCapital Finance Corp., Senior subordinated loan 2
Schedule of Investments [Line Items]
Coupon | Rate		11.97%	[2]	9.00%	[1]		11.97%	[2]	11.97%	[2]	11.97%	[2]	11.97%	[2]	9.00%	[1]	9.00%	[1]	9.00%	[1]
Total first lien senior secured loans		$ 56.0	[3],[4]	$ 5.4	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 55.4	[3],[4]	5.4	[6],[7]
Investment, Identifier [Axis]: eCapital Finance Corp., Senior subordinated loan 3
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.97%					11.97%		11.97%		11.97%		11.97%
Total first lien senior secured loans	[3],[4]	$ 24.3
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 24.1
Investment, Identifier [Axis]: eCapital Finance Corp., Senior subordinated loan 4
Schedule of Investments [Line Items]
Coupon | Rate	[2]	11.97%					11.97%		11.97%		11.97%		11.97%
Total first lien senior secured loans	[3],[4]	$ 5.4
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	5.3
Investment, Identifier [Axis]: eResearch Technology, Inc. and Astorg VII Co-Invest ERT
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		2.5		2.5
Less: funded commitments		0.0		0.0
Total unfunded commitments		2.5		2.5
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		2.5		2.5
Investment, Identifier [Axis]: eResearch Technology, Inc. and Astorg VII Co-Invest ERT, Limited partnership interest
Investments Activity And Fair Value Table [Abstract]
Fair Value		$ 3.7	[4],[5]	$ 5.4	[7],[8]
Investment, Identifier [Axis]: eResearch Technology, Inc. and Astorg VII Co-Invest ERT, Second lien senior secured loan
Schedule of Investments [Line Items]
Coupon | Rate	[1]			8.50%											8.50%		8.50%		8.50%
Total first lien senior secured loans	[6]			$ 22.5
Investments Activity And Fair Value Table [Abstract]
Fair Value	[6]			$ 22.4
Investment, Identifier [Axis]: eResearch Technology, Inc. and Astorg VII Co-Invest ERT, Second lien senior secured loan 1
Schedule of Investments [Line Items]
Coupon | Rate	[2]	12.07%					12.07%		12.07%		12.07%		12.07%
Total first lien senior secured loans	[3],[4]	$ 30.6
Investments Activity And Fair Value Table [Abstract]
Fair Value	[3],[4]	$ 27.2
Investment, Identifier [Axis]: eResearch Technology, Inc. and Astorg VII Co-Invest ERT, Second lien senior secured loan 2
Schedule of Investments [Line Items]
Coupon | Rate		12.38%	[2]	8.50%	[1]		12.38%	[2]	12.38%	[2]	12.38%	[2]	12.38%	[2]	8.50%	[1]	8.50%	[1]	8.50%	[1]
Total first lien senior secured loans		$ 17.2	[3],[4]	$ 30.6	[6],[7]
Investments Activity And Fair Value Table [Abstract]
Fair Value		15.3	[3],[4]	30.6	[6],[7]
Investment, Identifier [Axis]: n2y Holding, LLC
Financial Support for Nonconsolidated Legal Entity [Abstract]
Total commitments		0.1		0.1
Less: funded commitments		0.0		0.0
Total unfunded commitments		0.1		0.1
Less: commitments substantially at discretion of the Company		0.0		0.0
Less: unavailable commitments due to borrowing base or other covenant restrictions		0.0		0.0
Total net adjusted unfunded revolving and delayed draw commitments		$ 0.1		$ 0.1

[1] Investments without an interest rate are non-income producing.

[2] Investments without an interest rate are non-income producing.

[3] Loan includes interest rate floor feature.

[4] These assets are pledged as collateral under the Company’s or the Company’s consolidated subsidiaries’ various revolving credit facilities and, as a result, are not directly available to the creditors of the Company to satisfy any obligations of the Company other than the obligations under each of the respective facility (see Note 5).

[5] This portfolio company is not a qualifying asset under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Company's total assets. Pursuant to Section 55(a) of the Investment Company Act, 25% of the Company's total assets are represented by investments at fair value and other assets that are considered "non-qualifying assets" as of December 31, 2022.

[6] Loan includes interest rate floor feature.

[7] These assets are pledged as collateral under the Company’s or the Company’s consolidated subsidiaries’ various revolving credit facilities and, as a result, are not directly available to the creditors of the Company to satisfy any obligations of the Company other than the obligations under each of the respective facility (see Note 5).

[8] This portfolio company is not a qualifying asset under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Company's total assets. Pursuant to Section 55(a) of the Investment Company Act, 16% of the Company's total assets are represented by investments at fair value and other assets that are considered "non-qualifying assets" as of December 31, 2021.

[9] Loan was on non-accrual status as of December 31, 2022.

[10] Loan was on non-accrual status as of December 31, 2021.

[11] Other than the investments noted by this footnote, the fair value of the Company’s investments is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 8 to the consolidated financial statements for more information regarding the fair value of the Company’s investments.

[12] Other than the investments noted by this footnote, the fair value of the Company’s investments is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 8 to the consolidated financial statements for more information regarding the fair value of the Company’s investments.

[13] As of December 31, 2022, in addition to the amounts funded by the Company under this first lien senior secured revolving loan, there were also letters of credit issued and outstanding through a financial intermediary under the loan. See Note 7 for further information on letters of credit commitments related to certain portfolio companies.

[14] As of December 31, 2021, in addition to the amounts funded by the Company under this first lien senior secured revolving loan, there were also letters of credit issued and outstanding through a financial intermediary under the loan. See Note 7 for further information on letters of credit commitments related to certain portfolio companies.

[15] As of December 31, 2022, no amounts were funded by the Company under this first lien senior secured revolving loan; however, there were letters of credit issued and outstanding through a financial intermediary under the loan. See Note 7 for further information on letters of credit commitments related to certain portfolio companies.

[16] As of December 31, 2021, no amounts were funded by the Company under this first lien senior secured revolving loan; however, there were letters of credit issued and outstanding through a financial intermediary under the loan. See Note 7 for further information on letters of credit commitments related to certain portfolio companies.

[17] The Company sold a participating interest of approximately $79.0 in aggregate principal amount outstanding of the portfolio company’s first lien senior secured revolving loan. As the transaction did not qualify as a “true sale” in accordance with GAAP, the Company recorded a corresponding $79.0 secured borrowing, at fair value, included in “secured borrowings” in the accompanying consolidated balance sheet. As of December 31, 2022, the interest rate in effect for the secured borrowing was 11.62%.

[18] The Company sold a participating interest of approximately $75.0 in aggregate principal amount outstanding of the portfolio company’s first lien senior secured revolving loan. As the transaction did not qualify as a “true sale” in accordance with GAAP, the Company recorded a corresponding $73.2 secured borrowing, at fair value, included in “secured borrowings” in the accompanying consolidated balance sheet. As of December 31, 2021, the interest rate in effect for the secured borrowing was 8.50%.

[19] As of December 31, 2021, the Company was party to subscription agreements to fund equity investments in private equity investment partnerships as follows: (in millions)
CompanyTotal private equity commitmentsLess: funded private equity commitmentsTotal unfunded private equity commitmentsLess: private equity commitments substantially at the discretion of the CompanyTotal net adjusted unfunded private equity commitmentsPCG-Ares Sidecar Investment, L.P. and PCG-Ares Sidecar Investment II, L.P.$50.0 $(12.5)$37.5 $(37.5)$— European Capital UK SME Debt LP60.9 (55.1)5.8 (5.8)— $110.9 $(67.6)$43.3 $(43.3)$— 

[20] In addition to the interest earned based on the stated interest rate of this security, the Company is entitled to receive an additional interest amount of 2.00% on $40.9 in aggregate principal amount of a “first out” tranche of the portfolio company’s senior term debt previously syndicated by the Company into “first out” and “last out” tranches, whereby the “first out” tranche will have priority as to the “last out” tranche with respect to payments of principal, interest and any other amounts due thereunder.

[21] In addition to the interest earned based on the stated interest rate of this security, the Company is entitled to receive an additional interest amount of 2.00% on $46.9 in aggregate principal amount of a “first out” tranche of the portfolio company’s senior term debt previously syndicated by the Company into “first out” and “last out” tranches, whereby the “first out” tranche will have priority as to the “last out” tranche with respect to payments of principal, interest and any other amounts due thereunder.