v3.25.2
Financial Highlights - Schedule Of Financial Highlights (Details) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Investment Company, Financial Highlights [Roll Forward]            
Net asset value, beginning of period (in dollars per share) $ 23.64 $ 24.46        
Results of operations            
Net investment income (loss) (in dollars per share) 1.29 1.53        
Net realized gain (loss) and unrealized appreciation (depreciation) (in dollars per share) (1.60) (0.54)        
Net increase (decrease) in net assets resulting from operations (in dollars per share) (0.31) 0.99        
Stockholder distributions            
Distributions from net investment income (in dollars per share) (1.40) (1.50)        
Distributions from net realized gain on investments (in dollars per share) 0 0        
Net decrease in net assets resulting from stockholder distributions (in dollars per share) (1.40) (1.50)        
Capital share transactions            
Repurchases of common stock (in dollars per share) 0 0        
Net increase (decrease) in net assets resulting from capital share transactions (in dollars per share) 0 0        
Net asset value, end of period (in dollars per share) 21.93 23.95        
Per share market value, end of period (in dollars per share) $ 20.75 $ 19.73        
Shares outstanding, end of period (in shares) 280,066,433 280,066,433   280,066,433    
Total return based on net asset value (1.33%) 4.05%        
Total return based on market value 1.95% 6.47%        
Ratio/Supplemental Data:            
Net assets, end of period $ 6,141 $ 6,707 $ 6,546 $ 6,622 $ 6,812 $ 6,849
Ratio of net investment income to average net assets 10.88% 12.38%        
Ratio of total operating expenses to average net assets 13.24% 12.93%        
Ratio of net operating expenses to average net assets 13.24% 12.93%        
Portfolio turnover 21.99% 18.82%        
Total amount of senior securities outstanding, exclusive of treasury securities $ 8,022 $ 8,001   $ 7,385    
Asset coverage per unit 177.00% 184.00%