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Fee Income - Narrative (Details) - Base Management Fees - Private funds - Fee income
6 Months Ended
Jun. 30, 2023
Minimum  
Management Fee Income [Line Items]  
Management fee revenue, percent of total commitments during commitment period and thereafter invested capital 0.20%
Maximum  
Management Fee Income [Line Items]  
Management fee revenue, percent of total commitments during commitment period and thereafter invested capital 1.50%