Overview And Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Reclassification [Line Items]
Total revenue	$ 957.3	$ 884.9	$ 2,866.3	$ 2,819.8
Amortization of purchased intangible assets	27.7	19.9	80.9	63.4
Total cost of sales	367.1	369.5	1,110.8	1,217.3
As Previously Reported
Reclassification [Line Items]
Total revenue		884.9		2,819.8
Amortization of purchased intangible assets		19.9		63.4
Total cost of sales		369.5		1,217.3
Product
Reclassification [Line Items]
Total revenue	444.0	472.5	1,368.9	1,570.3
Cost of sales	215.6	239.8	665.7	815.5
Product | As Previously Reported
Reclassification [Line Items]
Total revenue		503.9		1,690.0
Cost of sales		240.7		819.0
Product | Effect of Change in Presentation
Reclassification [Line Items]
Total revenue		(31.4)		(119.7)
Cost of sales		(0.9)		(3.5)
Subscription and services
Reclassification [Line Items]
Total revenue	513.3	412.4	1,497.4	1,249.5
Cost of sales	$ 123.8	109.8	$ 364.2	338.4
Subscription and services | Effect of Change in Presentation
Reclassification [Line Items]
Total revenue		412.4		1,249.5
Cost of sales		109.8		338.4
Service | As Previously Reported
Reclassification [Line Items]
Total revenue		158.3		477.4
Cost of sales		53.9		180.6
Service | Effect of Change in Presentation
Reclassification [Line Items]
Total revenue		(158.3)		(477.4)
Cost of sales		(53.9)		(180.6)
Subscription | As Previously Reported
Reclassification [Line Items]
Total revenue		222.7		652.4
Cost of sales		55.0		154.3
Subscription | Effect of Change in Presentation
Reclassification [Line Items]
Total revenue		(222.7)		(652.4)
Cost of sales		$ (55.0)		$ (154.3)