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Segment and Related Information - Schedule of Segment Performance Based on Income (Loss) before Interest Income and Other Income and Expense (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |
Revenues | $ 202.3 | $ 178.8
Depreciation and amortization | 18.3 | 13.2
Segment operating income (loss) | 1.2 | 84.0
Diagnostics [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 189.0 | 167.4
Depreciation and amortization | 17.0 | 11.8
Segment operating income (loss) | 27.6 | 30.6
Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 13.3 | 11.4
Depreciation and amortization | 1.3 | 1.4
Segment operating income (loss) | $ (26.4) | $ 53.4

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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