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Segment and Related Information - Schedule Of Comparison Of Balance Sheet Assets By Operating Segment (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net equipment, leasehold improvements and property	$ 43.2	$ 51.1
Total assets	1,174.1	1,208.9
Diagnostics [Member]
Segment Reporting Information [Line Items]
Net equipment, leasehold improvements and property	12.2	20.2
Total assets	840.3	885.4
Other [Member]
Segment Reporting Information [Line Items]
Net equipment, leasehold improvements and property	31.0	30.9
Total assets	122.5	124.3
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 962.8	$ 1,009.7

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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