v3.26.1
Fair Value of Financial Instruments - Information about Significant Unobservable Inputs used in Fair Value Measurement (Details) - Level III
$ in Millions
Jun. 30, 2026
USD ($)
basis_points
Financial instruments and other inventory positions sold, but not yet purchased | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative liability contracts, measurement input 0.7
Financial instruments and other inventory positions sold, but not yet purchased | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative liability contracts, measurement input 36
Financial instruments and other inventory positions sold, but not yet purchased | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative liability contracts, measurement input 16.5
Financial instruments and other inventory positions owned | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative asset contracts, measurement input 0
Financial instruments and other inventory positions owned | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative asset contracts, measurement input 28
Financial instruments and other inventory positions owned | Interest rate locks | Discounted cash flow | Premium over the MMD curve | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Derivative asset contracts, measurement input 10.8
Investments  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value | $ $ 195.8
Investments | Measurement Input, Recent Round of Independent Financing  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value | $ $ 62.2
Investments | Discounted cash flow | Discount rate | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 0.15
Investments | Discounted cash flow | Discount rate | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 0.25
Investments | Discounted cash flow | Discount rate | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 0.220
Investments | Market approach | Revenue multiple | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 3
Investments | Market approach | Revenue multiple | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 10
Investments | Market approach | Revenue multiple | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 7.1
Investments | Market approach | EBITDA multiple | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 10
Investments | Market approach | EBITDA multiple | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 19
Investments | Market approach | EBITDA multiple | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 14.8
Investments | Market approach | Equity value as multiple of independent financing value | Minimum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 1
Investments | Market approach | Equity value as multiple of independent financing value | Maximum  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 2
Investments | Market approach | Equity value as multiple of independent financing value | Weighted Average  
Fair Value Inputs Assets and Liabilities Quantitative Information  
Investments at fair value, measurement input 1.8