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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Basis Of Presentation [Line Items]
Net gain (loss) on foreign currency transactions		$ (0.4)	$ (0.2)	$ 0.1	$ (0.6)
Purchase price included in cash				2.5
Assets acquired accrued Contingent Consideration	$ 1.3	1.3		1.3
Research and development expenses				3.7
Liabilities recorded in acquisition	1.5	1.5		$ 1.5
Period for amount payable upon meeting milestones				December 2021 through December 2023
Long-term deferred tax asset	0.3	0.3		$ 0.3
Assets held for sale	37.1	37.1		37.1
Current assets held for sale	21.0	21.0		21.0
Non-current assets held for sale	16.1	16.1		16.1
Asset Purchase Agreement [Member]
Basis Of Presentation [Line Items]
Cash consideration receivable on divestiture of business	$ 120.0
Percentage of purchase price of inventory	5.00%
Business divestiture closing	fourth quarter of fiscal 2020
Contingent Consideration Milestones Payable Dates from December 2021 through December 2023 [Member]
Basis Of Presentation [Line Items]
Purchase price in contingent consideration	$ 6.5	$ 6.5		$ 6.5

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