XML 50 R40.htm IDEA: XBRL DOCUMENT v3.22.2.2

INVESTMENTS - Schedule of Investments (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) borrower	Dec. 31, 2021 USD ($) borrower
Schedule of Investments [Line Items]
Amortized Cost	$ 21,468.5	$ 19,810.0
Fair Value	$ 21,338.5	$ 20,009.5
Loans on non-accrual status, as a percent of total investments at amortized cost	1.60%	0.80%
Loans on non-accrual status, as a percent of total investments at fair value	0.90%	0.50%
Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	100.00%	100.00%
Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	100.00%	100.00%
Senior Direct Lending Program
Schedule of Investments [Line Items]
Number of borrowers | borrower	21	19
West | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	34.50%	31.20%
West | Senior Direct Lending Program | Investments, At Fair Value | Customer Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	5.30%	4.90%
Midwest | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	25.00%	27.90%
Southeast | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	17.80%	17.20%
Mid-Atlantic | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	13.10%	14.50%
Northeast | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	4.60%	4.80%
International | Investments, At Fair Value | Geographic Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	5.00%	4.40%
Software & Services
Schedule of Investments [Line Items]
Amortized Cost	$ 4,924.8	$ 4,308.2
Fair Value	$ 4,816.4	$ 4,378.1
Software & Services | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	22.50%	21.90%
Diversified Financials
Schedule of Investments [Line Items]
Amortized Cost	$ 2,512.7	$ 1,363.8
Fair Value	$ 2,631.3	$ 1,505.3
Diversified Financials | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	12.30%	7.50%
Health Care Services
Schedule of Investments [Line Items]
Amortized Cost	$ 2,231.9	$ 2,133.9
Fair Value	$ 2,155.8	$ 2,157.1
Health Care Services | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	10.10%	10.80%
Commercial & Professional Services
Schedule of Investments [Line Items]
Amortized Cost	$ 1,768.3	$ 1,820.0
Fair Value	$ 1,746.8	$ 1,833.4
Commercial & Professional Services | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	8.20%	9.20%
Investment Funds and Vehicles
Schedule of Investments [Line Items]
Amortized Cost	$ 1,152.9	$ 1,020.0
Fair Value	$ 1,166.2	$ 1,032.4
Investment Funds and Vehicles | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	5.50%	5.20%
Insurance Services
Schedule of Investments [Line Items]
Amortized Cost	$ 1,101.3	$ 1,144.0
Fair Value	$ 1,081.3	$ 1,167.3
Insurance Services | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	5.10%	5.80%
Power Generation
Schedule of Investments [Line Items]
Amortized Cost	$ 953.2	$ 877.8
Fair Value	$ 1,007.2	$ 898.9
Power Generation | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	4.70%	4.50%
Consumer Services | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	4.00%	3.90%
Capital Goods
Schedule of Investments [Line Items]
Amortized Cost	$ 818.9	$ 945.3
Fair Value	$ 854.0	$ 957.0
Capital Goods | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	4.00%	4.80%
Consumer Durables & Apparel
Schedule of Investments [Line Items]
Amortized Cost	$ 925.8	$ 918.7
Fair Value	$ 838.8	$ 874.4
Consumer Durables & Apparel | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	3.90%	4.40%
Automobiles & Components
Schedule of Investments [Line Items]
Amortized Cost	$ 736.4	$ 933.1
Fair Value	$ 674.5	$ 910.5
Automobiles & Components | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	3.20%	4.60%
Food & Beverage
Schedule of Investments [Line Items]
Amortized Cost	$ 508.5	$ 446.6
Fair Value	$ 508.8	$ 445.3
Food & Beverage | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	2.40%	2.20%
Pharmaceuticals, Biotechnology & Life Sciences
Schedule of Investments [Line Items]
Amortized Cost	$ 465.3	$ 394.2
Fair Value	$ 490.1	$ 386.8
Pharmaceuticals, Biotechnology & Life Sciences | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	2.30%	1.90%
Retailing and Distribution | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	2.20%	2.80%
Media & Entertainment
Schedule of Investments [Line Items]
Amortized Cost	$ 442.2	$ 434.7
Fair Value	$ 468.8	$ 448.2
Media & Entertainment | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	2.20%	2.20%
Other | Investments, At Fair Value | Industry Concentration Risk
Schedule of Investments [Line Items]
Composition, percent of fair value	7.40%	8.30%
First lien senior secured loans
Schedule of Investments [Line Items]
Amortized Cost	$ 9,821.0	$ 9,583.0
Fair Value	9,509.0	9,459.0
Second lien senior secured loans
Schedule of Investments [Line Items]
Amortized Cost	4,011.0	4,614.0
Fair Value	3,797.0	4,524.0
Subordinated certificates of the SDLP
Schedule of Investments [Line Items]
Amortized Cost	1,121.0	987.0
Fair Value	1,121.0	987.0
Senior subordinated loans
Schedule of Investments [Line Items]
Amortized Cost	1,102.0	896.0
Fair Value	1,051.0	890.0
Preferred equity
Schedule of Investments [Line Items]
Amortized Cost	2,071.0	1,547.0
Fair Value	2,052.0	1,561.0
Ivy Hill Asset Management, L.P.
Schedule of Investments [Line Items]
Amortized Cost	1,809.0	781.0
Fair Value	1,958.0	936.0
Other equity
Schedule of Investments [Line Items]
Amortized Cost	1,534.0	1,402.0
Fair Value	1,851.0	1,652.0
Unitranche loans
Schedule of Investments [Line Items]
Amortized Cost	5,127.0	5,210.0
Fair Value	$ 4,998.0	$ 5,163.0

X

- Definition

Investment Company, Number of Borrowers

+ References

No definition available.

+ Details

Name:	arcc_InvestmentCompanyNumberOfBorrowers
Namespace Prefix:	arcc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Investment Owned, Non-Accrual Status, Percent of Cost

+ References

No definition available.

+ Details

Name:	arcc_InvestmentOwnedNonAccrualStatusPercentOfCost
Namespace Prefix:	arcc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Investment Owned, Non-Accrual Status, Percent of Fair Value

+ References

No definition available.

+ Details

Name:	arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue
Namespace Prefix:	arcc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cost of the investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

+ Details

Name:	us-gaap_InvestmentOwnedAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5D
-Subparagraph (SX 210.12-13D(Column C))
-URI https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column C))
-URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010

+ Details

Name:	us-gaap_InvestmentOwnedAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=arcc_InvestmentsAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=arcc_IndustryConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap-supplement_InvestmentCompanyNonconsolidatedSubsidiaryAxis=arcc_SeniorDirectLendingProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap-supplement_WestRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap-supplement_MidwestRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap-supplement_SoutheastRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=arcc_USMidAtlanticRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap-supplement_NortheastRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=us-gaap_NonUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_SoftwareAndServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_DiversifiedFinancialsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_HealthcareSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_CommercialAndProfessionalServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_InvestmentFundsAndVehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap-supplement_InsuranceSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_PowerGenerationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap-supplement_ConsumerSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_CapitalGoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_ConsumerDurablesAndApparelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_AutomobilesAndComponentsSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap-supplement_FoodAndBeverageSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_PharmaceuticalsBiotechnologyAndLifeSciencesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap-supplement_RetailSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_MediaAndEntertainmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=arcc_OtherSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=arcc_SubordinatedCertificatesOfTheSDLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_SeniorSubordinatedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=arcc_IvyHillAssetManagementLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_OtherAggregatedInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: