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Fair Value Measurement - Quantitative Information about Partnership's Level III Inputs (Details)
$ in Millions
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets $ 8,316.4 $ 7,962.9
Fair value of liabilities 6,809.7 6,298.6
Level III    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 7,932.5 7,379.4
Fair value of liabilities 6,809.1 6,298.6
Level III | Discounted Cash Flow with Consensus Pricing | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities   190.0
Level III | Other | Senior secured notes    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of liabilities 6,598.8 6,090.1
Level III | Investments of Consolidated Funds:    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 7,468.5 6,762.2
Level III | Equity securities | Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 3.9 3.3
Level III | Equity securities | Discounted Cash Flow    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 485.0 366.5
Level III | Equity securities | Other    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 44.9 7.8
Level III | Equity securities | Discounted Cash Flow    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 38.2  
Level III | Bonds | Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 465.1 522.5
Level III | Loans | Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 6,408.2 5,829.3
Level III | Loans | Discounted Cash Flow    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 10.2 11.0
Level III | Loans | Other    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 6.6 12.4
Level III | Loan two | Discounted Cash Flow    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 6.4 9.4
Level III | Senior secured notes    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   472.2
Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 321.8  
Level III | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   59.4
Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 57.1  
Fair value of liabilities 210.3  
Level III | Subordinated notes and preferred shares | Other    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   1.0
Fair value of liabilities   18.5
Level III | BDC preferred shares | Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   81.7
Level III | BDC preferred shares | Other    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 53.4  
Level III | BDC preferred shares | Other    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   81.7
Level III | Aviation subordinated notes    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets   $ 2.9
Level III | Aviation subordinated notes | Discounted Cash Flow    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets 2.9  
Level III | Loans | Consensus Pricing    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair value of assets $ 28.8  
Indicative Quotes | Level III | Discounted Cash Flow with Consensus Pricing | Minimum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.11 0.16
Indicative Quotes | Level III | Discounted Cash Flow with Consensus Pricing | Maximum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.87 1.03
Indicative Quotes | Level III | Discounted Cash Flow with Consensus Pricing | Weighted Average | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.34 0.41
Indicative Quotes | Level III | Equity securities | Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) | $ / shares 0.00 0.00
Indicative Quotes | Level III | Equity securities | Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) | $ / shares 112.17 208.38
Indicative Quotes | Level III | Equity securities | Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) | $ / shares 0.01 0.11
Indicative Quotes | Level III | Bonds | Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.30 0.30
Indicative Quotes | Level III | Bonds | Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 1.03 1.05
Indicative Quotes | Level III | Bonds | Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.93 0.90
Indicative Quotes | Level III | Loans | Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0 0
Indicative Quotes | Level III | Loans | Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 1.05 1.02
Indicative Quotes | Level III | Loans | Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.97 0.95
Indicative Quotes | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.80 0.72
Indicative Quotes | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 1.01 1.01
Indicative Quotes | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.99 0.96
Indicative Quotes | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01 0.06
Indicative Quotes | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 1.03 0.90
Indicative Quotes | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.38 0.40
Indicative Quotes | Level III | Loans | Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.99  
Indicative Quotes | Level III | Loans | Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.99  
Indicative Quotes | Level III | Loans | Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.99  
Discount Rate | Level III | Discounted Cash Flow with Consensus Pricing | Minimum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.02 0.14
Discount Rate | Level III | Discounted Cash Flow with Consensus Pricing | Maximum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.35 0.30
Discount Rate | Level III | Discounted Cash Flow with Consensus Pricing | Weighted Average | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.15 0.21
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.10 0.10
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.13 0.11
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.11 0.10
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.14  
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.34  
Discount Rate | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.18  
Discount Rate | Level III | Loans | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.09 0.07
Discount Rate | Level III | Loans | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.19 0.16
Discount Rate | Level III | Loans | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.18 0.15
Discount Rate | Level III | Loan two | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.16 0.17
Discount Rate | Level III | Loan two | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.16 0.17
Discount Rate | Level III | Loan two | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.16 0.17
Discount Rate | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.04 0.11
Discount Rate | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.35 0.40
Discount Rate | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.16 0.21
Discount Rate | Level III | Aviation subordinated notes | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.21 0.21
Discount Rate | Level III | Aviation subordinated notes | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.21 0.21
Discount Rate | Level III | Aviation subordinated notes | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.21 0.21
Terminal Growth Rate | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.03 0
Terminal Growth Rate | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.07 0.07
Terminal Growth Rate | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.06 0.05
EBITDA Multiple | Level III | Equity securities | Comparable Multiple | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 7.7 12.7
EBITDA Multiple | Level III | Equity securities | Comparable Multiple | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 23.2 12.7
EBITDA Multiple | Level III | Equity securities | Comparable Multiple | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 12.8 12.7
TCF Multiple | Level III | Equity securities | Comparable Multiple | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 26 24.3
TCF Multiple | Level III | Equity securities | Comparable Multiple | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 26 24.3
TCF Multiple | Level III | Equity securities | Comparable Multiple | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 26 24.3
Discount Margins | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.0113 0.0139
Discount Margins | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.1535 0.1600
Discount Margins | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.0214 0.0319
Constant Prepayment Rate | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.06  
Constant Prepayment Rate | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.16  
Constant Prepayment Rate | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.11  
Constant Prepayment Rate | Level III | Loan two | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.08 0.08
Constant Prepayment Rate | Level III | Loan two | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.14 0.08
Constant Prepayment Rate | Level III | Loan two | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.11 0.08
Default Rates | Level III | Discounted Cash Flow with Consensus Pricing | Minimum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.01 0.02
Default Rates | Level III | Discounted Cash Flow with Consensus Pricing | Maximum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.02 0.02
Default Rates | Level III | Discounted Cash Flow with Consensus Pricing | Weighted Average | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.02 0.02
Default Rates | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01  
Default Rates | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.04  
Default Rates | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02  
Default Rates | Level III | Loans | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.01
Default Rates | Level III | Loans | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.01
Default Rates | Level III | Loans | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.01
Default Rates | Level III | Loan two | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01  
Default Rates | Level III | Loan two | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01  
Default Rates | Level III | Loan two | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01  
Default Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02 0.02
Default Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02 0.02
Default Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02 0.02
Default Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.01 0.01
Default Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02 0.02
Default Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.02 0.02
Recovery Rates | Level III | Discounted Cash Flow with Consensus Pricing | Minimum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Discounted Cash Flow with Consensus Pricing | Maximum | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Discounted Cash Flow with Consensus Pricing | Weighted Average | Subordinated notes and preferred shares    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Liabilities, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Equity securities | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0  
Recovery Rates | Level III | Equity securities | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.40  
Recovery Rates | Level III | Equity securities | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.17  
Recovery Rates | Level III | Loans | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0
Recovery Rates | Level III | Loans | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0
Recovery Rates | Level III | Loans | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0
Recovery Rates | Level III | Loan two | Discounted Cash Flow | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0  
Recovery Rates | Level III | Loan two | Discounted Cash Flow | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0  
Recovery Rates | Level III | Loan two | Discounted Cash Flow | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0  
Recovery Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Senior secured notes | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Recovery Rates | Level III | Subordinated notes and preferred shares | Discounted Cash Flow with Consensus Pricing | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 0.60 0.60
Net Asset Value per Share | Level III | BDC preferred shares | Other | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 16.80  
Net Asset Value per Share | Level III | BDC preferred shares | Other | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 16.80  
Net Asset Value per Share | Level III | BDC preferred shares | Other | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent) 16.80  
Other | Level III | BDC preferred shares | Other | Minimum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.11
Other | Level III | BDC preferred shares | Other | Maximum    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.11
Other | Level III | BDC preferred shares | Other | Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Assets, measurement input (percent)   0.11