Stock-Based Compensation and Employee Benefit Plan - Restricted Stock Units (Additional Information) (Details) - Restricted Stock - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 10.5	$ 39.7	$ 23.7	$ 90.7
Unrecognized stock-based compensation cost	$ 35.3	$ 108.2	$ 35.3	$ 108.2
Expense expected to be recognized over a weighted-average period			1 year 2 months 12 days	1 year 1 month 6 days