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Cash and Cash Equivalents - Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Cash and Cash Equivalents [Line Items]        
Restricted cash $ 15.6 $ 0.5    
Total cash and cash equivalents 685.4 674.7    
Restricted cash included in other assets 0.0 15.0    
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows 685.4 689.7 $ 737.1 $ 806.4
Cash        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents 118.1 136.1    
Money market mutual funds        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents 447.0 487.3    
Time deposits        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents $ 104.7 $ 50.8