Deferred Revenue And Remaining Performance Obligations (Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Contract With Customer, Asset And Liability [Roll Forward]
Beginning balance of the period	$ 760.8	$ 703.9	$ 737.6	$ 631.8
Revenue recognized from prior year-end	(141.7)	(127.2)	(435.2)	(361.8)
Billings net of revenue recognized from current year	126.5	108.5	443.2	415.2
Ending balance of the period	$ 745.6	$ 685.2	$ 745.6	$ 685.2