v3.26.1
Borrowings - Castle Peak Funding Facility (Details) - Revolving Credit Facility - Line of Credit
12 Months Ended
Sep. 24, 2026
Dec. 23, 2025
Sep. 25, 2024
Jan. 04, 2024
Dec. 31, 2023
Debt Instrument [Line Items]          
Interest rate   1.80%      
Castle Peak Funding Facility | Scenario 1          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage   0.40% 1.90%   1.85%
Castle Peak Funding Facility | Scenario 1 | Forecast          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage 1.50%        
Castle Peak Funding Facility | Scenario 2          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage     0.90%   0.50%
Castle Peak Funding Facility | Scenario 2 | Forecast          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage 0.75%        
Castle Peak Funding Facility | Scenario 3          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage     0.25%    
Castle Peak Funding Facility | Scenario 3 | Forecast          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage 0.25%        
Castle Peak Funding Facility | Scenario 4          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage     0.00%    
Castle Peak Funding Facility | Scenario 4 | Forecast          
Debt Instrument [Line Items]          
Unused capacity, commitment fee percentage 0.00%        
Low | Castle Peak Funding Facility          
Debt Instrument [Line Items]          
Interest rate   1.70% 1.60% 1.85% 1.70%
Low | Castle Peak Funding Facility | Scenario 1          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     35.00%   30.00%
Low | Castle Peak Funding Facility | Scenario 1 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 35.00%        
Low | Castle Peak Funding Facility | Scenario 2          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     15.00%   10.00%
Low | Castle Peak Funding Facility | Scenario 2 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 15.00%        
Low | Castle Peak Funding Facility | Scenario 3          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     5.00%    
Low | Castle Peak Funding Facility | Scenario 3 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 5.00%        
High | Castle Peak Funding Facility          
Debt Instrument [Line Items]          
Interest rate     2.50% 2.35% 2.20%
High | Castle Peak Funding Facility | Scenario 2          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     35.00%   30.00%
High | Castle Peak Funding Facility | Scenario 2 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 35.00%        
High | Castle Peak Funding Facility | Scenario 3          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     15.00%    
High | Castle Peak Funding Facility | Scenario 3 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 15.00%        
High | Castle Peak Funding Facility | Scenario 4          
Debt Instrument [Line Items]          
Unused capacity threshold percentage     5.00%    
High | Castle Peak Funding Facility | Scenario 4 | Forecast          
Debt Instrument [Line Items]          
Unused capacity threshold percentage 5.00%