Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($) Segment	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)		Jul. 01, 2019 USD ($)	Jun. 30, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Number of reportable segments | Segment	2
Investment securities maturity period for consideration as cash equivalents, in days	90 days
Inventory	$ 23.2	$ 21.5
Advertising costs	9.8	6.8	$ 4.1
Operating lease liability recognized	303.3	323.5
Operating lease right-of-use asset recognized	262.0	292.6
Cumulative effect of changes in accounting principle	$ 1,809.1	$ 1,346.5	1,127.5			$ 1,094.3
Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Operating lease liability recognized					$ 252.0
Operating lease right-of-use asset recognized					235.4
Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Cumulative effect of changes in accounting principle			$ 0.2	[1]	$ 0.2	$ 101.3	[2]
Software and Software Development Costs | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	3 years
Software and Software Development Costs | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Largest Customer | Customer Concentration Risk | Revenue Benchmark
Property, Plant and Equipment [Line Items]
Percentage of consolidated revenues	6.00%	6.00%	6.00%

[1] Reflects the adoption of accounting standards as described in Note 2, “Summary of Significant Accounting Policies.”

[2] Primarily reflects the adoption of accounting standards as described in Note 3, “Revenue Recognition.”