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Revenue - Summary of Activity in Sales Rebates and Discounts Liability (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Change In Contract With Customer, Liability [Roll Forward]    
Beginning balance $ 118.5 $ 114.8
Reduction of revenue 316.3 221.0
Payments (284.4) (217.3)
Ending balance $ 150.4 $ 118.5