Description of Business, Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Property and Equipment, Net

Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method, over the estimated useful lives of the following assets:

	Estimated Useful Life (years)
Computers, equipment, and software (*)	1.5 to 10
Furniture and fixtures	5 to 7
Building and building improvements	7 to 40
Land improvements	10 to 40
Leasehold improvements	Lease term, not to exceed 10 years

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(*)    Effective January 1, 2024, we increased the expected useful life of certain lab equipment from 3-5 years to 7 years to better reflect the economic value of our assets.

Property and equipment, net, consisted of the following (in millions):

	As of December 31,
	2023		2022
Computers and equipment	$	990.0	$	940.0
Software	221.3		220.3
Leasehold improvements	185.9		189.2
Furniture and fixtures	45.3		45.4
Building and building improvements	292.8		271.9
Land and land improvements	243.6		243.6
Construction-in-process	4.1		12.1
Property and equipment, gross	1,983.0		1,922.5
Accumulated depreciation	(1,293.1)		(1,255.7)
Property and equipment, net	$	689.9	$	666.8