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Other Balance Sheet Details - Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment	$ 110.5	$ 86.3
Less accumulated depreciation	(51.9)	(41.7)
Total property and equipment, net	58.6	44.6
Tenant improvements
Property, Plant and Equipment [Line Items]
Property and equipment	34.9	29.5
Scientific equipment
Property, Plant and Equipment [Line Items]
Property and equipment	51.6	39.2
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment	18.1	13.9
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	$ 5.9	$ 3.7

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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