Goodwill and Other Intangible Assets, net - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Mar. 31, 2021	Jun. 30, 2020
Other intangible assets
Gross Carrying Amount	$ 129.3	$ 129.3
Accumulated Amortization	(72.8)	(69.9)
Impairment	(11.6)	(7.3)
Net Carrying Amount	44.9	52.1
Trademarks and trade names
Other intangible assets
Gross Carrying Amount	33.5	33.5
Accumulated Amortization	(25.2)	(25.4)
Impairment	(1.5)	(1.5)
Net Carrying Amount	$ 6.8	6.6
Trademarks and trade names | Minimum
Other intangible assets
Useful Life (in Years)	15 years
Trademarks and trade names | Maximum
Other intangible assets
Useful Life (in Years)	30 years
Customer relationships
Other intangible assets
Gross Carrying Amount	$ 76.9	76.9
Accumulated Amortization	(44.8)	(41.2)
Impairment	(4.2)	(1.2)
Net Carrying Amount	$ 27.9	34.5
Customer relationships | Minimum
Other intangible assets
Useful Life (in Years)	10 years
Customer relationships | Maximum
Other intangible assets
Useful Life (in Years)	15 years
Non-compete agreements
Other intangible assets
Useful Life (in Years)	5 years
Gross Carrying Amount	$ 0.2	0.2
Accumulated Amortization	(0.1)	(0.1)
Impairment	(0.1)	(0.1)
Net Carrying Amount	$ 0.0	0.0
Technology
Other intangible assets
Useful Life (in Years)	15 years
Gross Carrying Amount	$ 7.3	7.3
Accumulated Amortization	(1.5)	(1.5)
Impairment	(5.8)	(4.5)
Net Carrying Amount	0.0	1.3
Patents
Other intangible assets
Gross Carrying Amount	11.4	11.4
Accumulated Amortization	(1.2)	(1.7)
Impairment	0.0	0.0
Net Carrying Amount	$ 10.2	$ 9.7
Patents | Minimum
Other intangible assets
Useful Life (in Years)	14 years
Patents | Maximum
Other intangible assets
Useful Life (in Years)	20 years