Leases - Narratives (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Purchase of the underlying assets of a lease arrangement	$ 3.3	$ 34.5	$ 17.0
Derecognition of operating lease assets	2.6
Derecognition of lease liability	2.5
Finance lease assets	3.6	3.6
Finance lease liability, current	0.7	0.7
Long-term finance lease liabilities	3.3	3.3
Interest expense	0.1	0.2
Amortizaiton of finance lease	$ 0.2	0.4
Operating cash flows from finance leases		0.2
Financing cash flows		$ 0.7	$ 0.0
Weighted average remaining lease term	5 years 6 months	5 years 6 months
Weighted average interest rate	6.70%	6.70%
Rental revenue	$ 0.3	$ 0.5
Minimum
Operating Leased Assets [Line Items]
Operating lease term	3 months	3 months
Finance lease term	3 years	3 years
Maximum
Operating Leased Assets [Line Items]
Operating lease term	22 years	22 years
Finance lease term	7 years	7 years