Quarterly report [Sections 13 or 15(d)]

SUBSEQUENT EVENTS (Details)

v3.25.1
SUBSEQUENT EVENTS (Details) - USD ($)
 1 Months Ended 3 Months Ended 216 Months Ended
May 09, 2025
Apr. 30, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Aug. 31, 2024
May 31, 2024
Subsequent Event [Line Items]                    
Increase in common stock, dividends, per share, declared, monthly (as a percent)           4.10%        
Dividends paid, per share (in dollars per share)         $ 1.05   $ 1.02      
MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Average interest rate (as a percent)         6.70%   7.90%      
Revolving Credit Facility | Corporate Facility | Line of Credit                    
Subsequent Event [Line Items]                    
Line of credit facility         $ 1,110,000,000         $ 995,000,000.0
Line of credit facility, maximum borrowing capacity including accordion feature         $ 1,665,000,000         $ 1,400,000,000
Average interest rate (as a percent)         6.30%   7.30%      
Line of credit facility, unused capacity, commitment fee (as a percent)         0.25%          
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)         2.35%          
Line of credit facility         $ 600,000,000.0 $ 600,000,000.0     $ 430,000,000.0  
Line of credit facility, maximum borrowing capacity including accordion feature         $ 800,000,000 $ 800,000,000.0        
Line of credit facility, unused capacity, commitment fee (as a percent)         0.50%          
Line of credit facility, unused percentage of commitment amount (as a percent)         0.35          
Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period One | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, credit spread adjustment (as a percent)         0.10%          
Debt instrument, basis spread on variable rate (as a percent)         2.50%          
Average interest rate (as a percent)         2.60%          
Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period Two | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Average interest rate (as a percent)         2.625%          
Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period Three | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)         2.60%          
Average interest rate (as a percent)         2.75%          
Revolving Credit Facility | SPV Facility | Line of Credit | Minimum | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Line of credit facility, unused capacity, commitment fee (as a percent)         0.50%          
Subsequent Event | Revolving Credit Facility | Corporate Facility | Line of Credit                    
Subsequent Event [Line Items]                    
Debt instrument, credit spread adjustment (as a percent)   0.10%                
Line of credit facility   $ 1,145,000,000                
Line of credit facility, maximum borrowing capacity including accordion feature   $ 1,718,000,000                
Subsequent Event | Revolving Credit Facility | Corporate Facility | Line of Credit | Variable Rate Component One | Minimum                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)   1.775%                
Subsequent Event | Revolving Credit Facility | Corporate Facility | Line of Credit | Variable Rate Component Two | Minimum                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)   1.65%                
Subsequent Event | Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Line of credit facility, unused capacity, commitment fee (as a percent)   0.40%                
Line of credit facility, unused percentage of commitment amount (as a percent)   0.50                
Subsequent Event | Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period One | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)   1.95%                
Average interest rate (as a percent)   2.35%                
Subsequent Event | Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period Two | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)   2.075%                
Average interest rate (as a percent)   2.475%                
Subsequent Event | Revolving Credit Facility | SPV Facility | Line of Credit | Margin Effective Period Three | MSCC Funding I, LLC                    
Subsequent Event [Line Items]                    
Debt instrument, basis spread on variable rate (as a percent)   2.20%                
Average interest rate (as a percent)   2.60%                
O 2025 Q2 Supplemental Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) $ 0.30                  
O 2025 Q2 Dividends | Forecast                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share)       $ 0.75            
O 2025 M4 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) 0.25                  
O 2025 M5 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) 0.25                  
O 2025 M6 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) 0.25                  
O 2025 Q2 Including Supplemental Dividends | Forecast                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share)       $ 1.05            
O 2025 M7 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) 0.255                  
O 2025 M8 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) 0.255                  
O 2025 M9 Dividends | Subsequent Event                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share) $ 0.255                  
O 2025 Q3 Dividends | Forecast                    
Subsequent Event [Line Items]                    
Common stock, dividend, per share, declared (in dollars per share)     $ 0.765              
O 2025 Q2 Covering Period Since October 2027 Initial Public Offering and Including Supplemental Dividends | Forecast                    
Subsequent Event [Line Items]                    
Dividends paid, per share (in dollars per share)               $ 45.79