Deferred Revenue And Remaining Performance Obligations (Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2022	Oct. 01, 2021
Contract With Customer, Asset And Liability [Roll Forward]
Beginning balance of the period	$ 685.2	$ 606.1	$ 631.8	$ 613.8
Revenue recognized from prior year-end	(92.0)	(92.3)	(453.8)	(471.8)
Billings net of revenue recognized from current year	43.6	75.2	458.8	447.0
Ending balance of the period	$ 636.8	$ 589.0	$ 636.8	$ 589.0