Segment Information - Reconciliation of Segment Gross Profit to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Gross Profit	$ 424.8	$ 197.1	$ 753.5	$ 302.2
Sales and marketing	(177.4)	(160.5)	(292.1)	(238.1)
General and administrative	(141.1)	(77.5)	(249.7)	(138.5)
Research and development	(47.5)	(20.7)	(84.1)	(38.1)
Total other income, net	1.8	5.7	3.5	6.9
Income (loss) before provision for income taxes	$ 60.6	$ (55.8)	$ 131.2	$ (105.5)