Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Recognition of deferred revenue	$ 11.3	$ 14.7	$ 38.2	$ 57.8
Remaining performance obligations amount	$ 959.4		$ 959.4
Percentage of changes in operating results on entity's revenue			10.00%
Capitalized contract cost, amortization period	5 years		5 years
Capitalized costs to obtain a contract	$ 8.2		$ 8.2		$ 8.4
Impairment loss	0.5		0.7
Capitalized contract cost, amortization	0.7	$ 0.5	1.7	$ 1.8
Long-term warranty and service
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations amount	79.4		79.4
Performance Obligations Other Than Warrant
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations amount	$ 880.0		$ 880.0