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Equity Incentive Plan - Other (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended				24 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
2019 SPP
Equity Transactions
Vesting period			3 years
Equity Incentive Market Based Restricted Stock Awards
Equity Transactions
Performance shares	6,800	6,800				6,800	6,800
Number of consecutive days considered for the computation of average closing stock prices					30 days
Granted (in shares)					14.35
Nonvested at the end of the period (in shares)	6,800	6,800				6,800
Restricted Stock
Equity Transactions
Stock based compensation expense		$ 17.1	$ 12.3	$ 15.7
Fair value of share-based compensation awards granted in period		30.2	15.3
Fair value of share-based compensation awards vested in period		$ 17.9	$ 20.6
Vesting period		3 years
Performance shares	1,618,604	1,618,604	1,322,552	1,676,907	2,141,047	1,618,604	1,618,604	1,322,552
Unrecognized compensation							$ 25.6
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted		1 year 7 months 6 days
Nonvested at the beginning of the period (in shares)		1,322,552	1,676,907	2,141,047		1,676,907
Granted (in shares)		1,126,227	828,833	1,210,502
Vested (in shares)		(750,634)	(947,703)	(1,339,492)
Forfeited or canceled (in shares)		(79,541)	(235,485)	(335,150)
Nonvested at the end of the period (in shares)	1,618,604	1,618,604	1,322,552	1,676,907	2,141,047	1,618,604
Nonvested at the beginning of the period (in dollars per share)		$ 17.08	$ 15.12	$ 12.34		$ 15.12
Granted (in dollars per share)		26.84	18.44	16.68
Vested (in dollars per share)		16.93	14.72	12.29
Forfeited or canceled (in dollars per share)		21.48	17.40	14.31
Nonvested at the end of the period (in dollars per share)	$ 23.73	$ 23.73	$ 17.08	$ 15.12	$ 12.34	$ 23.73
Restricted Stock \| Vesting Performance
Equity Transactions
Performance shares	559,089	559,089				559,089	559,089
Granted (in shares)		499,818
Nonvested at the end of the period (in shares)	559,089	559,089				559,089
Restricted Stock \| Service based awards
Equity Transactions
Performance shares	1,059,515	1,059,515				1,059,515	1,059,515
Granted (in shares)		626,409
Vested (in shares)		(533,367)
Nonvested at the end of the period (in shares)	1,059,515	1,059,515				1,059,515
Restricted Stock \| Vesting Based On Performance And Service
Equity Transactions
Vested (in shares)		(210,467)
Performance Share Units
Equity Transactions
Stock based compensation expense		$ 6.3	$ 3.9	$ 5.9
Granted (in shares)	66,934
Performance shares	2,445,022	2,445,022	2,372,241	708,979	1,043,602	2,445,022	2,445,022	2,372,241
Unrecognized compensation							$ 7.9
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted		1 year 2 months 12 days
Nonvested at the beginning of the period (in shares)		2,372,241	708,979	1,043,602		708,979
Granted (in shares)		81,133	2,372,241	138,241
Vested (in shares)			(427,954)	(320,340)
Forfeited or canceled (in shares)		(8,352)	(281,025)	(152,524)
Nonvested at the end of the period (in shares)	2,445,022	2,445,022	2,372,241	708,979	1,043,602	2,445,022
Nonvested at the beginning of the period (in dollars per share)		$ 10.61	$ 13.15	$ 13.16		$ 13.15
Granted (in dollars per share)	$ 12.56	15.30	10.61	12.81
Vested (in dollars per share)			13.24	12.62
Forfeited or canceled (in dollars per share)		29.93	13.02	14.00
Nonvested at the end of the period (in dollars per share)	$ 10.70	$ 10.70	$ 10.61	$ 13.15	$ 13.16	$ 10.70
Option holders right (per option)							1
Performance Share Units \| 2019 SPP
Equity Transactions
Granted (in shares)			2,108,305
Performance Share Units \| Fiscal Year 2019 LTIP
Equity Transactions
Stock based compensation expense		$ 0.0
Granted (in shares)		14,199
Granted (in dollars per share)		$ 28.17
Fair value							$ 0.4	$ 7.9
Granted (in shares)			263,936
Granted (in dollars per share)			$ 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 #1 \| Calendar Year 2021 \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage		70.00%
Performance Shares Tranche #2 \| Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage		25.00%
Performance Shares Tranche #2 \| Calendar Year 2022 \| Fiscal Year 2020 TRIP
Equity Transactions
Earned award vesting percentage		30.00%
Performance Shares Tranche #3 \| Fiscal Year 2019 LTIP
Equity Transactions
Earned award vesting percentage						30.00%
Deferred Stock Units
Equity Transactions
Stock based compensation expense		$ 0.5	$ 0.5	$ 0.0
Performance shares	42,102	42,102	18,258			42,102	42,102	18,258
Unrecognized compensation							$ 0.2
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted		6 months
Nonvested at the beginning of the period (in shares)		18,258
Granted (in shares)		23,844	18,258
Nonvested at the end of the period (in shares)	42,102	42,102	18,258			42,102
Nonvested at the beginning of the period (in dollars per share)		$ 25.41
Granted (in dollars per share)		20.13	$ 25.41
Nonvested at the end of the period (in dollars per share)	$ 22.42	$ 22.42	$ 25.41			$ 22.42
Chief Executive Officer And Executive Chairman \| Performance Share Units
Equity Transactions
Granted (in shares)		358,294
Granted (in dollars per share)		$ 27.91
Chief Executive Officer And Executive Chairman \| Performance Share Units \| Vesting Performance
Equity Transactions
Vesting in first subsequent fiscal year (as a percent)		66.67%
Vesting in second subsequent fiscal year (as a percent)		33.33%
Senior Executives \| Performance Share Units \| 2019 SPP
Equity Transactions
Market capitalization growth performance period		3 years	3 years
Threshold period average price of stock to determine final amount	30 days
Threshold days after release of fiscal year 2021 results to calculate average price of stock	7 days
Granted (in dollars per share)			$ 8.18
Senior Executives \| Performance Share Units \| Total stock price growth less than 25% \| 2019 SPP
Equity Transactions
Amount earned as percentage of total value growth			0.00%
Percentage of total stock price growth			25.00%
Annualized percentage of total stock price growth			7.60%
Senior Executives \| Performance Share Units \| Total stock price growth 33%
Equity Transactions
Amount earned as percentage of total value growth			6.00%
Percentage of total stock price growth			33.00%
Senior Executives \| Performance Share Units \| Total stock price growth 33% \| 2019 SPP
Equity Transactions
Annualized percentage of total stock price growth			10.00%
Senior Executives \| Performance Share Units \| Total stock price growth equals or greater than 95% \| 2019 SPP
Equity Transactions
Amount earned as percentage of total value growth			7.50%
Percentage of total stock price growth			95.00%
Annualized percentage of total stock price growth			25.00%
Executive Officers \| Performance Share Units \| Vest immediately upon achievement of the performance goals
Equity Transactions
Earned award vesting percentage		33.33%
Executive Officers \| Performance Share Units \| Vest annually over two years
Equity Transactions
Earned award vesting percentage		66.67%
Vesting period		2 years
Executive Officers \| Performance Share Units \| Vesting Performance
Equity Transactions
Granted (in shares)		141,524
Granted (in dollars per share)		$ 27.91