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Segment and Related Information - Segment Revenue and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 173.1	$ 164.0
Depreciation and amortization	18.4	17.9
Segment operating income (loss)	(46.7)	(133.7)
Diagnostics
Segment Reporting Information [Line Items]
Revenues	157.8	150.5
Depreciation and amortization	17.0	16.8
Segment operating income (loss)	10.5	(93.6)
Other
Segment Reporting Information [Line Items]
Revenues	15.3	13.5
Depreciation and amortization	1.4	1.1
Segment operating income (loss)	$ (57.2)	$ (40.1)

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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.

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