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Equity Incentive Plan - Vesting (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Employee and Non Employees Stock Option
Equity Transactions
Intrinsic value of options exercised			$ 24.5	$ 0.0
Stock based compensation expense	$ 0.0	$ 0.0	0.0	0.1
Restricted Stock
Equity Transactions
Unrecognized compensation	28.6		$ 28.6
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted			1 year 4 months 24 days
Stock based compensation expense	5.5	4.5	$ 16.6	12.9
Granted (in shares)			519,808
Granted (in dollars per share)			$ 38.93
Performance Share Units
Equity Transactions
Unrecognized compensation	11.6		$ 11.6
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted			8 months 12 days
Stock based compensation expense	$ 7.4	$ 1.5	$ 14.2	$ 4.6
Granted (in shares)			477,700
Granted (in dollars per share)			$ 40.17		$ 12.56
Performance Share Units | Fiscal Year 2019 LTIP
Equity Transactions
Granted (in shares)					34,030	263,936
Fair value					$ 0.8	$ 7.9
Granted (in dollars per share)					$ 23.51	$ 30.05
Performance Share Units | Fiscal Year 2020 TRIP
Equity Transactions
Fair value					$ 12.3
Performance Share Units | Revenue | Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage					60.00%
Performance Share Units | EBITDA | Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage					40.00%
Performance Shares Tranche #1 | Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage					45.00%
Performance Shares Tranche #2 | Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage					25.00%
Performance Shares Tranche #3 | Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage					30.00%
Calendar Year 2021 | Performance Shares Tranche #1 | Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage					70.00%
Calendar Year 2022 | Performance Shares Tranche #2 | Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage					30.00%

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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