Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2017
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 417,200,000	$ 318,600,000	[1]	$ 316,100,000
Impairment of goodwill	0	0		0
Impairment of long-lived assets	0	$ 0		$ 0
Estimated amortization expenses of intangible assets for 2020	52,000,000.0
Estimated amortization expenses of intangible assets for 2021	51,900,000
Estimated amortization expenses of intangible assets for 2022	45,000,000.0
Estimated amortization expenses of intangible assets for 2023	43,700,000
Estimated amortization expenses of intangible assets for 2024	43,400,000
Estimated amortization expenses of intangible assets after 2024	$ 425,800,000
Developed Technology and Database [Member] | Minimum [Member]
Goodwill And Intangible Assets [Line Items]
Estimated useful life	3 years
Developed Technology and Database [Member] | Maximum [Member]
Goodwill And Intangible Assets [Line Items]
Estimated useful life	15 years
Trademarks [Member]
Goodwill And Intangible Assets [Line Items]
Estimated useful life	10 years
Weighted average remaining amortization period	12 years
Customer Relationships [Member]
Goodwill And Intangible Assets [Line Items]
Estimated useful life	3 years
Weighted average remaining amortization period	12 years
Purchased Licenses and Technologies [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average remaining amortization period	12 years
Diagnostics [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 351,600,000
Other [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 65,600,000

[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements of this report for additional information.