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Summary of Significant Accounting Policies - Equity Investments (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Jun. 04, 2024
Dec. 31, 2023
Sep. 30, 2024
Sep. 30, 2024
Class of Stock [Line Items]        
Unrealized loss recognized     $ 18.4 $ 19.4
Common Stock Issued | Vital Energy, Inc        
Class of Stock [Line Items]        
Shares of Vital Energy's common stock held (in shares)     1,027,907 1,027,907
Common Stock Issued | 2023 Divestitures | Vital Energy, Inc        
Class of Stock [Line Items]        
Noncash or part noncash divestiture, consideration received (in shares)   561,752    
Common Stock Issued | 2024 Divestitures | Vital Energy, Inc        
Class of Stock [Line Items]        
Noncash or part noncash divestiture, common stock, shares (in shares)     75,000  
Realized gain on sale     $ 0.1  
Convertible Preferred Stock | 2023 Divestitures | Vital Energy, Inc        
Class of Stock [Line Items]        
Noncash or part noncash divestiture, consideration received (in shares) 541,155      
Preferred stock, dividend rate (in percent) 2.00%