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Investments in Marketable Securities - Additional Information (Details) - USD ($)
$ in Millions
 2 Months Ended 12 Months Ended
Feb. 15, 2023
Dec. 31, 2022
Dec. 31, 2021
Investments in and Advances to Affiliates [Line Items]      
Equity securities, FV-NI   $ 447.9 $ 64.5
Unrealized gains   59.9 8.1
Debt securities, available-for-sale, maturity, year one   100.7  
Debt securities, available-for-sale, maturity, year two   150.3  
EQT AB (“EQT”)      
Investments in and Advances to Affiliates [Line Items]      
Equity securities, FV-NI   405.1  
Equity securities, realized gain   43.8  
Unrealized gains   57.9  
EQT AB (“EQT”) | Subsequent Event      
Investments in and Advances to Affiliates [Line Items]      
Equity interests issued, value $ 196.0    
Affiliate Sponsored Investment      
Investments in and Advances to Affiliates [Line Items]      
Equity securities, FV-NI   23.5 28.9
Debt securities, fair value, consolidation   $ 18.0 $ 14.0