Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity-based compensation expense	$ 51.4	$ 48.6	$ 104.0	$ 94.0
Cost of revenue
Equity-based compensation expense	0.2	0.2	0.4	0.3
Technology and development
Equity-based compensation expense	27.9	22.0	54.9	43.1
Marketing and advertising
Equity-based compensation expense	7.0	5.4	13.2	10.0
Customer care
Equity-based compensation expense	3.7	3.3	6.7	5.9
General and administrative
Equity-based compensation expense	$ 12.6	$ 17.7	$ 28.8	$ 34.7