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Revenue and Contract Acquisition Costs - Summary of Contract Acquisition Costs (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Prepaid expenses and other current assets $ 10.4 $ 9.5
Other assets 20.7 19.9
Total capitalized contract acquisition costs, net $ 31.1 $ 29.4