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Financial Instruments and Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2024
Apr. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Fair Value by Fair Value Hierarchy Level [Line Items]                
Investment       $ 78.0   $ 78.0    
Unfunded commitments       22.2   22.2    
Capital contributions           18.3    
Investment in equity securities       68.1   $ 68.1   $ 10.1
Payments to acquire equity securities       8.0        
Series C Preferred Stock                
Fair Value by Fair Value Hierarchy Level [Line Items]                
Investment in equity securities $ 50.0              
Payments to acquire equity securities $ 10.0 $ 40.0            
Minimum                
Fair Value by Fair Value Hierarchy Level [Line Items]                
Investment fund, term           7 years    
Investment fund, option to extend, term           2 years    
Maximum                
Fair Value by Fair Value Hierarchy Level [Line Items]                
Investment fund, term           10 years    
Investment fund, option to extend, term           3 years    
Fair Value Measured at Net Asset Value Per Share                
Fair Value by Fair Value Hierarchy Level [Line Items]                
Equity securities without readily determinable fair value       $ 78.0   $ 78.0   $ 56.7
Interest Rate Swap                
Fair Value by Fair Value Hierarchy Level [Line Items]                
Derivative, cash received     $ 12.2          
Derivative, gain on derivative, net         $ 21.4   $ 15.7