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Cash and Cash Equivalents - Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Cash and Cash Equivalents [Line Items]        
Restricted cash $ 0.5 $ 1.6    
Total cash and cash equivalents 722.0 791.6    
Restricted cash included in other assets 15.1 14.8    
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows 737.1 806.4 $ 871.4 $ 922.0
Cash        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents 117.7 159.3    
Money market mutual funds        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents 553.4 630.7    
Time deposits        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents $ 50.4 $ 0.0