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Segment and Related Information - Segment Revenue and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 167.3	$ 145.2	$ 529.8	$ 402.4
Depreciation and amortization	14.2	17.7	49.5	53.3
Segment operating income (loss)	(79.9)	(39.6)	(147.4)	(241.6)
Diagnostics
Segment Reporting Information [Line Items]
Revenues	161.7	130.5	496.6	362.0
Depreciation and amortization	13.1	16.7	45.8	50.2
Segment operating income (loss)	(21.7)	(0.3)	26.3	(127.7)
Other
Segment Reporting Information [Line Items]
Revenues	5.6	14.7	33.2	40.4
Depreciation and amortization	1.1	1.0	3.7	3.1
Segment operating income (loss)	$ (58.2)	$ (39.3)	$ (173.7)	$ (113.9)

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