Description Of Business And Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Jan. 01, 2021 USD ($)	Jan. 03, 2020 USD ($)
Accounting Policies [Line Items]
Reportable segments | segment	4
Subscription revenue term	3 years
Unbilled receivables	$ 39,500,000	$ 138,700,000
Accounts receivable, allowance for credit loss	7,000,000	7,000,000
Deferred costs to obtain customer contracts	59,700,000	51,300,000
Accrued warranty expenses	17,100,000	13,800,000
Advertising expense	31,600,000	28,600,000	$ 42,700,000
Research and development expense with third party funding earned	12,600,000	16,300,000	16,500,000
Accounts receivable, credit loss expense (reversal)	2,600,000	7,100,000	6,500,000
Selling and Marketing Expense
Accounting Policies [Line Items]
Amortization expense related to deferred costs to obtain customer contracts	$ 25,900,000	22,800,000	$ 22,300,000
Land, building, furniture, and leasehold improvements
Accounting Policies [Line Items]
Useful life of asset, in years	39 years
Minimum
Accounting Policies [Line Items]
Product warranty term	1 year
Post contract	1 year
Amortization period	3 years
Weighted-Average Useful Lives (in years)	3 years
Warranty periods for products sold	1 year
Maturity period of derivative financial instrument, minimum, in months	1 month
Minimum | Machinery and equipment
Accounting Policies [Line Items]
Useful life of asset, in years	4 years
Minimum | Furniture and fixtures
Accounting Policies [Line Items]
Useful life of asset, in years	5 years
Minimum | Computer equipment and software
Accounting Policies [Line Items]
Useful life of asset, in years	2 years
Minimum | Internal-use of software
Accounting Policies [Line Items]
Useful life of asset, in years	2 years
Maximum
Accounting Policies [Line Items]
Product warranty term	2 years
Post contract	3 years
Amortization period	7 years
Weighted-Average Useful Lives (in years)	10 years
Warranty periods for products sold	2 years
Maturity period of derivative financial instrument, minimum, in months	2 months
Maximum | Machinery and equipment
Accounting Policies [Line Items]
Useful life of asset, in years	6 years
Maximum | Furniture and fixtures
Accounting Policies [Line Items]
Useful life of asset, in years	10 years
Maximum | Computer equipment and software
Accounting Policies [Line Items]
Useful life of asset, in years	5 years
Maximum | Internal-use of software
Accounting Policies [Line Items]
Useful life of asset, in years	5 years
Weighted average
Accounting Policies [Line Items]
Weighted-Average Useful Lives (in years)	7 years
Forward contracts
Accounting Policies [Line Items]
Derivative financial instruments accounted for as hedges	$ 0	$ 0