v3.26.1
Fair Value Measurements - Significant Unobservable Inputs of the Company’s Level 3 Financial Instruments (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 77,649,107 $ 82,199,346
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 72,948,084 75,023,423
Level 3 | First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 68,127,653 68,786,055
Level 3 | First lien debt | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 65,593,802 66,420,844
Level 3 | First lien debt | Asset Recoverability    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,075 7,100
Level 3 | First lien debt | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 1,675,426 1,886,879
Level 3 | First lien debt | Market Quotations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 852,350 $ 471,232
Level 3 | First lien debt | Low | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0268 0.0281
Level 3 | First lien debt | Low | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.8 5.5
Level 3 | First lien debt | Low | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 60.65 82.44
Level 3 | First lien debt | High | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 2.9467 0.3247
Level 3 | First lien debt | High | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 26.5 12.47
Level 3 | First lien debt | High | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 100.13 101
Level 3 | First lien debt | Weighted Average | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1049 0.0906
Level 3 | First lien debt | Weighted Average | Asset Recoverability | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2500  
Level 3 | First lien debt | Weighted Average | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.11 10.76
Level 3 | First lien debt | Weighted Average | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 96.2 99.65
Level 3 | Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,429,066 $ 2,479,259
Level 3 | Second lien debt | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 2,399,339 2,476,991
Level 3 | Second lien debt | Asset Recoverability    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 29,727  
Level 3 | Second lien debt | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 2,268
Level 3 | Second lien debt | Low | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0872 0.0845
Level 3 | Second lien debt | Low | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.15 11.84
Level 3 | Second lien debt | High | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2182 0.2142
Level 3 | Second lien debt | High | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.68 11.84
Level 3 | Second lien debt | Weighted Average | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1062 0.1019
Level 3 | Second lien debt | Weighted Average | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.4 11.84
Level 3 | Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 60,216 $ 57,816
Level 3 | Unsecured debt | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 60,216 $ 57,816
Level 3 | Unsecured debt | Low | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1327 0.1347
Level 3 | Unsecured debt | High | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1705 0.1510
Level 3 | Unsecured debt | Weighted Average | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1469 0.1414
Level 3 | Structured finance obligations - debt instruments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 210,320 $ 501,333
Level 3 | Structured finance obligations - debt instruments | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 28,130 29,655
Level 3 | Structured finance obligations - debt instruments | Market Quotations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 182,190 $ 471,678
Level 3 | Structured finance obligations - debt instruments | Low | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0842
Level 3 | Structured finance obligations - debt instruments | Low | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 77.22 89.01
Level 3 | Structured finance obligations - debt instruments | High | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0842
Level 3 | Structured finance obligations - debt instruments | High | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 100.43 101.99
Level 3 | Structured finance obligations - debt instruments | Weighted Average | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0510 0.0842
Level 3 | Structured finance obligations - debt instruments | Weighted Average | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 94.25 99.31
Level 3 | Structured finance obligations - equity instruments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 263,118 $ 301,610
Level 3 | Structured finance obligations - equity instruments | Market Quotations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 213,397 296,743
Level 3 | Structured finance obligations - equity instruments | Distribution Waterfall    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 49,721  
Level 3 | Structured finance obligations - equity instruments | Transaction Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 4,867
Level 3 | Structured finance obligations - equity instruments | Low | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.02 0.02
Level 3 | Structured finance obligations - equity instruments | Low | Distribution Waterfall | Liquidation Discount    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0250  
Level 3 | Structured finance obligations - equity instruments | High | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 77.75 105.7
Level 3 | Structured finance obligations - equity instruments | High | Distribution Waterfall | Liquidation Discount    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0250  
Level 3 | Structured finance obligations - equity instruments | Weighted Average | Market Quotations | Broker Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 57.1 73.29
Level 3 | Structured finance obligations - equity instruments | Weighted Average | Distribution Waterfall | Liquidation Discount    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0250  
Level 3 | Equity and other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,857,711 $ 2,897,350
Level 3 | Equity and other | Yield Analysis    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 428,625 1,642,499
Level 3 | Equity and other | Asset Recoverability    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   381,241
Level 3 | Equity and other | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 407,869 34,418
Level 3 | Equity and other | Market Quotations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 483,374 387,101
Level 3 | Equity and other | Estimated Net Asset Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 516,177 430,975
Level 3 | Equity and other | Option Pricing Model    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 21,666 $ 21,116
Level 3 | Equity and other | Low | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0796 0.0776
Level 3 | Equity and other | Low | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 1 0.055
Level 3 | Equity and other | Low | Market Quotations | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 5 6.4
Level 3 | Equity and other | Low | Estimated Net Asset Value | Net Asset Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 1.05 26.08
Level 3 | Equity and other | Low | Option Pricing Model | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3200 0.3200
Level 3 | Equity and other | High | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2836 0.1950
Level 3 | Equity and other | High | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 12 0.16
Level 3 | Equity and other | High | Market Quotations | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 26.5 33.63
Level 3 | Equity and other | High | Estimated Net Asset Value | Net Asset Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 26.14 26.08
Level 3 | Equity and other | High | Option Pricing Model | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7550 0.7050
Level 3 | Equity and other | Weighted Average | Yield Analysis | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1241 0.0891
Level 3 | Equity and other | Weighted Average | Asset Recoverability | Market Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 2.77 0.1165
Level 3 | Equity and other | Weighted Average | Market Quotations | Performance Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 13.19 16.8
Level 3 | Equity and other | Weighted Average | Estimated Net Asset Value | Net Asset Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 24.72 26.08
Level 3 | Equity and other | Weighted Average | Option Pricing Model | Expected Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3437 0.3366