Income Taxes - Schedule of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 57.6	$ 50.7	$ 37.1
Gross increases related to prior period tax positions	13.2	8.3	12.2
Gross decreases related to prior period tax positions	(3.3)	(0.5)	0.0
Gross increases related to current period tax positions	6.9	8.3	4.3
Gross decreases related to settlements	(0.3)	(4.2)	(0.2)
Gross decreases due to lapse of the statute of limitations	(5.4)	(5.0)	(2.7)
Ending balance	$ 68.8	$ 57.6	$ 50.7