Updates to Significant Accounting Policies - Revenue Recognition And Deferred Revenue Narratives (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 29, 2018	Dec. 29, 2017
Deferred Revenue Arrangement [Line Items]
Allowance for Doubtful Accounts Receivable, Current	$ 4.2	$ 3.6
Weighted Average [Member] | Software Service, Support and Maintenance Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue Contract Term	1 year
Maximum
Deferred Revenue Arrangement [Line Items]
Warranty Period On Products Sold	2 years
Customer or Product Life	7 years
Maximum | Software Service, Support and Maintenance Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue Contract Term	3 years
Maximum | Subscription Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue Contract Term	5 years
Minimum
Deferred Revenue Arrangement [Line Items]
Warranty Period On Products Sold	1 year
Customer or Product Life	3 years
Minimum | Software Service, Support and Maintenance Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue Contract Term	1 year