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Revenue - Accounts Receivable and Current and Long-Term Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]      
Accounts Receivable, Less Allowance $ 2,352.4 $ 2,078.1 $ 2,088.9
Contract Assets (Current) 60.9 52.0  
Contract Assets (Long-Term) 131.2 170.7  
Contract Liabilities (Current) 259.8 266.3  
Contract Liabilities (Long-Term) $ 9.2 $ 8.2