Share-Based Compensation - Summary Of Share-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 03, 2020	Mar. 29, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 15.7	$ 19.7
Related income tax benefits at federal rate of 21%	(3.3)	(4.1)
Share-based compensation expense, net of taxes	12.4	15.6
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2.5	1.9
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	4.1	3.6
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2.9	3.8
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 6.2	$ 10.4

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Name Accounting Standards Codification
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