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Description Of Business And Accounting Policies (Narrative) (Details) | 12 Months Ended
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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 |

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