Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Jun. 30, 2019
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 327.1		$ 327.1	$ 417.2
Goodwill impairment charge			82.0
In-Process Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
Intangible assets impairment charge	17.7
Clinic Asset Group [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill impairment charge		$ 1.3
Crescendo Bioscience, Inc. [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill impairment charge	80.7
Diagnostics [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	270.3		270.3
Other [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 56.8		$ 56.8