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Revenue Recognition - Assets and Liabilities (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Receivables from contracts with customers, net of allowances $ 2,440.8 $ 2,354.3
Receivables from contracts with customers, net of allowances, increase (decrease) 86.5  
Contract liabilities 7.0 $ 492.7
Increase (decrease) in liabilities $ (485.7)