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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

12 Months Ended

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

^[1]

Mar. 31, 2018

^[1]

Dec. 31, 2017

^[1]

Sep. 30, 2017

^[1]

Jun. 30, 2019

Jun. 30, 2018

Jun. 30, 2017

Segment Reporting Information [Line Items]

Revenues

$ 215.4

$ 216.6

$ 216.8

$ 202.3

$ 193.9

$ 183.1

$ 187.9

$ 178.8

$ 851.1

$ 743.7

^[1],[2]

$ 728.7

^[1],[2]

Depreciation and amortization

73.0

54.4

^[1]

48.3

^[1]

Segment operating income (loss)

$ (5.6)

$ 5.9

$ 6.1

$ 1.2

$ 17.8

$ 13.8

$ 6.3

$ 84.0

7.6

121.9

^[1]

44.0

^[1]

Diagnostics [Member]

Segment Reporting Information [Line Items]

Revenues

789.4

690.4

679.4

Depreciation and amortization

67.7

49.2

42.8

Segment operating income (loss)

133.3

142.6

124.7

Other [Member]

Segment Reporting Information [Line Items]

Revenues

61.7

53.3

49.3

Depreciation and amortization

5.3

5.2

5.5

Segment operating income (loss)

$ (125.7)

$ (20.7)

$ (80.7)

[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.
[2]	Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606)

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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
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+ References

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