Share-Based Compensation - Performance Restricted Stock Units, Narrative (Details) - Performance Restricted Stock Units - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested awards	$ 0.6	$ 10.1	$ 6.3
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution percentage of target number of Performance Stock Units			0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution percentage of target number of Performance Stock Units			200.00%