Fair Value Measurement - Summary of Quantitative Information about Level III Inputs (Details) $ in Millions | Sep. 30, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 7,098.7 | $ 7,003.8 |
Fair value of liabilities | 5,333.2 | 5,811.7 |
Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 6,691.6 | 6,955.3 |
Fair value of liabilities | 5,303.7 | 5,811 |
Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of liabilities | 5,085.8 | 5,561.1 |
Investments of Consolidated Funds | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 6,127.4 | 6,515.5 |
Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 56.3 | |
Consensus Pricing | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 10.4 | 17.9 |
Consensus Pricing | Bonds | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 560.8 | 599.5 |
Consensus Pricing | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 4,853.1 | $ 5,766 |
Consensus Pricing | Indicative Quotes | Minimum | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0 | 0 |
Consensus Pricing | Indicative Quotes | Minimum | Bonds | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 55 | 0.93 |
Consensus Pricing | Indicative Quotes | Minimum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0 | 0.35 |
Consensus Pricing | Indicative Quotes | Maximum | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 17 | 84.22 |
Consensus Pricing | Indicative Quotes | Maximum | Bonds | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 1.25 | 1.07 |
Consensus Pricing | Indicative Quotes | Maximum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 1.03 | 1.06 |
Consensus Pricing | Indicative Quotes | Weighted Average | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.43 | 0.63 |
Consensus Pricing | Indicative Quotes | Weighted Average | Bonds | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.89 | 0.99 |
Consensus Pricing | Indicative Quotes | Weighted Average | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.93 | 0.98 |
Discounted Cash Flow | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 445.2 | |
Discounted Cash Flow | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 24 | $ 65.1 |
Discounted Cash Flow | Aviation subordinated notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 3.4 | $ 6.1 |
Discounted Cash Flow | Discount Rates | Minimum | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.09 | |
Discounted Cash Flow | Discount Rates | Minimum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.09 | 0.04 |
Discounted Cash Flow | Discount Rates | Minimum | Aviation subordinated notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.22 | 0.18 |
Discounted Cash Flow | Discount Rates | Maximum | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.10 | |
Discounted Cash Flow | Discount Rates | Maximum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.12 | 0.08 |
Discounted Cash Flow | Discount Rates | Maximum | Aviation subordinated notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.22 | 0.18 |
Discounted Cash Flow | Discount Rates | Weighted Average | Equity securities | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.09 | |
Discounted Cash Flow | Discount Rates | Weighted Average | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.10 | 0.05 |
Discounted Cash Flow | Discount Rates | Weighted Average | Aviation subordinated notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.22 | 0.18 |
Market Yield Analysis | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 61.3 | $ 67 |
Market Yield Analysis | BDC preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 61.2 | $ 72.5 |
Market Yield Analysis | Market Yield | Minimum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | $ / shares | 0.98 | 0.03 |
Market Yield Analysis | Market Yield | Minimum | BDC preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.07 | 0.07 |
Market Yield Analysis | Market Yield | Maximum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | $ / shares | 0.98 | 0.08 |
Market Yield Analysis | Market Yield | Maximum | BDC preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.07 | 0.07 |
Market Yield Analysis | Market Yield | Weighted Average | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | $ / shares | 0.98 | 0.05 |
Market Yield Analysis | Market Yield | Weighted Average | BDC preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.07 | 0.07 |
Consensus Pricing with Discounted Cash Flow | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of liabilities | $ 217.9 | $ 249.9 |
Consensus Pricing with Discounted Cash Flow | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | 430.7 | 289.7 |
Consensus Pricing with Discounted Cash Flow | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 68.9 | $ 71.5 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.19 | 0.40 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Minimum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.74 | 0.86 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.21 | 0.46 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 1.03 | 0.97 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Maximum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 1 | 1.01 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.66 | 0.97 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.43 | 0.61 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Weighted Average | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.95 | 0.99 |
Consensus Pricing with Discounted Cash Flow | Indicative Quotes | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.49 | 0.63 |
Consensus Pricing with Discounted Cash Flow | Discount Margins | Minimum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.0155 | 0.0050 |
Consensus Pricing with Discounted Cash Flow | Discount Margins | Maximum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.1700 | 0.1330 |
Consensus Pricing with Discounted Cash Flow | Discount Margins | Weighted Average | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.0336 | 0.0245 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.02 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Minimum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.01 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.01 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.03 | 0.02 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Maximum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.03 | 0.02 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.03 | 0.02 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.02 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Weighted Average | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.02 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Default Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.02 | 0.01 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.50 | 0.50 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Minimum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.50 | 0.50 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.50 | 0.50 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.70 | 0.70 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Maximum | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.70 | 0.70 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.70 | 0.70 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.60 | 0.60 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Weighted Average | Senior secured notes | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.60 | 0.60 |
Consensus Pricing with Discounted Cash Flow | Recovery Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.60 | 0.60 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.15 | 0.14 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Minimum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.13 | 0.14 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.25 | 0.22 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Maximum | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.25 | 0.22 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Liabilities, measurement input | 0.20 | 0.19 |
Consensus Pricing with Discounted Cash Flow | Discount Rates | Weighted Average | Subordinated notes and preferred shares | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.19 | 0.19 |
Other | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Fair value of assets | $ 116.3 | |
Other | Discount Rates | Minimum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.07 | |
Other | Discount Rates | Maximum | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.10 | |
Other | Discount Rates | Weighted Average | Loans | Level III | | |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | | |
Assets, measurement input | 0.08 | |