v3.26.1
Financial Highlights and Senior Securities - Financial Highlights (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 29, 2026
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Investment Company, Financial Highlights [Roll Forward]          
Net increase (decrease) in net assets from shareholders’ distributions (in dollars per share) $ (0.0470)        
Net value asset, ending balance (in dollars per share)   $ 1,000      
Shares outstanding, end of period (in shares)   501,538,142   493,104,572  
Supplemental Data:          
Net assets, end of period   $ 12,434,974 $ 9,638,063 $ 12,436,831 $ 8,733,932
Asset coverage ratio (as a percent)   196.00%   195.70%  
Investment company, repurchase (in usd per share)   $ 0.01 $ 0.01    
Class I shares          
Investment Company, Financial Highlights [Roll Forward]          
Net value asset, beginning balance (in dollars per share)   25.22 25.59    
Net investment income (in dollars per share)   0.62 0.65    
Net unrealized and realized gain (loss) (in dollars per share)   (0.41) (0.12)    
Net increase (decrease) in net assets resulting from operations (in dollars per share)   0.21 0.53    
Distributions from net investment income (in dollars per share)   (0.6400) (0.6450)    
Distributions from net realized gains (in dollars per share)   0 0    
Net increase (decrease) in net assets from shareholders’ distributions (in dollars per share)   (0.6400) (0.6450)    
Early repurchase deduction fee (in dollars per share)   0.00 0.00    
Total increase (decrease) in net assets (in dollars per share)   (0.43) (0.12)    
Net value asset, ending balance (in dollars per share)   $ 24.79 $ 25.47    
Shares outstanding, end of period (in shares)   197,713,842 126,858,175 192,514,877  
Total return based on NAV (as a percent)   0.84% 2.07%    
Ratios:          
Ratio of net expenses to average net assets (as a percent)   8.90% 8.82%    
Ratio of net investment income to average net assets (as a percent)   10.07% 10.16%    
Portfolio turnover rate (as a percent)   5.94% 1.72%    
Supplemental Data:          
Asset coverage ratio (as a percent)   196.00% 207.30%    
Class I shares | Common equity          
Supplemental Data:          
Net assets, end of period   $ 4,902,071 $ 3,230,780    
Class D shares          
Investment Company, Financial Highlights [Roll Forward]          
Net value asset, beginning balance (in dollars per share)   $ 25.22 $ 25.59    
Net investment income (in dollars per share)   0.61 0.64    
Net unrealized and realized gain (loss) (in dollars per share)   (0.42) (0.13)    
Net increase (decrease) in net assets resulting from operations (in dollars per share)   0.19 0.51    
Distributions from net investment income (in dollars per share)   (0.6245) (0.6293)    
Distributions from net realized gains (in dollars per share)   0 0    
Net increase (decrease) in net assets from shareholders’ distributions (in dollars per share)   (0.6245) (0.6293)    
Early repurchase deduction fee (in dollars per share)   0.00 0.00    
Total increase (decrease) in net assets (in dollars per share)   (0.43) (0.12)    
Net value asset, ending balance (in dollars per share)   $ 24.79 $ 25.47    
Shares outstanding, end of period (in shares)   43,243,811 43,223,693 45,135,208  
Total return based on NAV (as a percent)   0.77% 2.01%    
Ratios:          
Ratio of net expenses to average net assets (as a percent)   9.16% 9.07%    
Ratio of net investment income to average net assets (as a percent)   9.84% 9.93%    
Portfolio turnover rate (as a percent)   5.94% 1.72%    
Supplemental Data:          
Asset coverage ratio (as a percent)   196.00% 207.30%    
Class D shares | Common equity          
Supplemental Data:          
Net assets, end of period   $ 1,072,185 $ 1,100,795    
Class F shares          
Investment Company, Financial Highlights [Roll Forward]          
Net value asset, beginning balance (in dollars per share)   $ 25.22 $ 25.59    
Net investment income (in dollars per share)   0.59 0.62    
Net unrealized and realized gain (loss) (in dollars per share)   (0.41) (0.13)    
Net increase (decrease) in net assets resulting from operations (in dollars per share)   0.18 0.49    
Distributions from net investment income (in dollars per share)   (0.6090) (0.6135)    
Distributions from net realized gains (in dollars per share)   0 0    
Net increase (decrease) in net assets from shareholders’ distributions (in dollars per share)   (0.6090) (0.6135)    
Early repurchase deduction fee (in dollars per share)   0.00 0.00    
Total increase (decrease) in net assets (in dollars per share)   (0.43) (0.12)    
Net value asset, ending balance (in dollars per share)   $ 24.79 $ 25.47    
Shares outstanding, end of period (in shares)   227,707,232 188,166,432 223,188,196  
Total return based on NAV (as a percent)   0.71% 1.94%    
Ratios:          
Ratio of net expenses to average net assets (as a percent)   9.41% 9.32%    
Ratio of net investment income to average net assets (as a percent)   9.59% 9.67%    
Portfolio turnover rate (as a percent)   5.94% 1.72%    
Supplemental Data:          
Asset coverage ratio (as a percent)   196.00% 207.30%    
Class F shares | Common equity          
Supplemental Data:          
Net assets, end of period   $ 5,645,655 $ 4,792,120    
Class S shares          
Investment Company, Financial Highlights [Roll Forward]          
Net value asset, beginning balance (in dollars per share)   $ 25.22 $ 25.59    
Net investment income (in dollars per share)   0.57 0.60    
Net unrealized and realized gain (loss) (in dollars per share)   (0.41) (0.13)    
Net increase (decrease) in net assets resulting from operations (in dollars per share)   0.16 0.47    
Distributions from net investment income (in dollars per share)   (0.5874) (0.5914)    
Distributions from net realized gains (in dollars per share)   0 0    
Net increase (decrease) in net assets from shareholders’ distributions (in dollars per share)   (0.5874) (0.5914)    
Early repurchase deduction fee (in dollars per share)   0.00 0.00    
Total increase (decrease) in net assets (in dollars per share)   (0.43) (0.12)    
Net value asset, ending balance (in dollars per share)   $ 24.79 $ 25.47    
Shares outstanding, end of period (in shares)   32,873,257 20,196,896 32,266,291  
Total return based on NAV (as a percent)   0.63% 1.85%    
Ratios:          
Ratio of net expenses to average net assets (as a percent)   9.76% 9.67%    
Ratio of net investment income to average net assets (as a percent)   9.24% 9.31%    
Portfolio turnover rate (as a percent)   5.94% 1.72%    
Supplemental Data:          
Asset coverage ratio (as a percent)   196.00% 207.30%    
Class S shares | Common equity          
Supplemental Data:          
Net assets, end of period   $ 815,063 $ 514,368