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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 20, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Securities Act File Number 814-00663    
Entity Registrant Name ARES CAPITAL CORPORATION    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 33-1089684    
Entity Address, Address Line One 245 Park Avenue    
Entity Address, Address Line Two 44th Floor    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10167    
City Area Code 212    
Local Phone Number 750-7300    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol ARCC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Document Financial Statement Error Correction false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 13,066,189,804
Entity Common Stock, Shares Outstanding   684,478,489  
Documents Incorporated by Reference
Portions of the registrant’s Proxy Statement for its 2025 Annual Meeting of Stockholders to be filed not later than 120 days after the end of the fiscal year covered by this Amendment No. 1 to the Annual Report on Form 10-K for the fiscal year ended December 31, 2024 are incorporated by reference into Part III of this Amendment No. 1.
    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001287750