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Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Summary of financial assets with original maturities of less than 90 days included within cash and cash equivalents    
Cash equivalents $ 2,144.9 $ 1,632.2
Commercial paper    
Summary of financial assets with original maturities of less than 90 days included within cash and cash equivalents    
Cash equivalents 79.7 247.6
Overnight reverse repurchase agreements    
Summary of financial assets with original maturities of less than 90 days included within cash and cash equivalents    
Cash equivalents 83.8 200.0
Money market funds    
Summary of financial assets with original maturities of less than 90 days included within cash and cash equivalents    
Cash equivalents 1,764.5 901.6
Short-term debt securities    
Summary of financial assets with original maturities of less than 90 days included within cash and cash equivalents    
Cash equivalents $ 216.9 $ 283.0