SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Allowance for doubtful accounts receivable
Valuation accounts activity
Balance at Beginning of Period	$ 3.7	$ 2.6	$ 2.6
Charged to Costs & Expenses	1.7	1.7	0.1
Charged to Other Accounts	(2.0)	(0.6)	(0.1)
Deductions	0.0	0.0	0.0
Balance at End of Period	3.4	3.7	2.6
Deferred tax valuation allowance
Valuation accounts activity
Balance at Beginning of Period	24.6	23.9	18.5
Charged to Costs & Expenses	(0.4)	0.5	4.9
Charged to Other Accounts	0.0	0.2	0.5
Deductions	0.0	0.0	0.0
Balance at End of Period	$ 24.2	$ 24.6	$ 23.9