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Fair Value Measurements, Equity Investments and Other Financial Instruments - Equity Investment Without Readily Determinable Fair Value Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2020
Sep. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Equity investment fair value       $ 13.2 $ 13.3 $ 45.8  
Upward adjustments       0.0 0.0    
Impairments or downward adjustments $ 16.1     0.0 31.6    
Cumulative upward adjustment       21.7 21.7    
Cumulative downward adjustment       31.6 $ 31.6    
Cumulative adjustment, net       $ 9.9      
Equity Securities              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Equity investment fair value $ 0.0         31.6  
Additional investment           $ 9.0 $ 7.5
Upward adjustments     $ 15.1        
Impairments or downward adjustments   $ 15.5