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Borrowings - Revolving Credit Facility (Details) - Line of Credit
€ in Millions, £ in Millions, $ in Millions
Jun. 28, 2022
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2023
CAD ($)
Mar. 31, 2023
EUR (€)
Mar. 31, 2023
GBP (£)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CAD ($)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
GBP (£)
Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Asset coverage ratio 1.50                
Revolving Credit Facility | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity   $ 1,625,000,000 $ 274.9 € 97.9 £ 65.4 $ 1,625,000,000 $ 355.9 € 97.9 £ 66.6
Unused capacity, commitment fee percentage 0.375%                
Revolving Credit Facility | Scenario 1 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 0.75%                
Combined revolving debt amount multiplier 1.6                
Revolving Credit Facility | Scenario 2 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 0.875%                
Combined revolving debt amount multiplier 1.6                
Revolving Credit Facility | Scenario 3 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.75%                
Combined revolving debt amount multiplier 1.6                
Revolving Credit Facility | Scenario 4 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.875%                
Combined revolving debt amount multiplier 1.6                
Revolving Credit Facility | SOFR | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.00%                
Revolving Credit Facility | Base Rate | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 0.50%                
Letter of Credit | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity $ 175,000,000