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Segment and Related Information - Segment Revenue and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 189.4	$ 93.2	$ 362.5	$ 257.2
Depreciation and amortization	16.9	17.7	35.3	35.6
Segment operating income (loss)	(20.8)	(68.3)	(67.5)	(202.0)
Diagnostics
Segment Reporting Information [Line Items]
Revenues	177.1	81.0	334.9	231.5
Depreciation and amortization	15.7	16.7	32.7	33.5
Segment operating income (loss)	37.5	(33.8)	48.0	(127.4)
Other
Segment Reporting Information [Line Items]
Revenues	12.3	12.2	27.6	25.7
Depreciation and amortization	1.2	1.0	2.6	2.1
Segment operating income (loss)	$ (58.3)	$ (34.5)	$ (115.5)	$ (74.6)

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