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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Royalty expense incurred and are directly related to goods produced and sold and services rendered during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of entity's patents that another entity was found to have infringed.

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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

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Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

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Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty.

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Commitments and Contingencies (Narratives) (Details)		12 Months Ended
Commitments and Contingencies (Narratives) (Details)	Jan. 26, 2016 USD ($) patent	Dec. 30, 2016 USD ($) consent_order	Jan. 01, 2016 USD ($)	Jan. 02, 2015 USD ($)
Gain Contingencies [Line Items]
Gain on litigation settlement	$ 0
Expenses related to license agreements		$ 2,000,000	$ 2,400,000	$ 3,300,000
Standard product warranty description		The Company generally warrants that its products will meet customer specifications and will be free from defects in materials and workmanship.
Self Insurance Reserve		$ 7,700,000	7,900,000
Other Noncurrent Liabilities [Member]
Gain Contingencies [Line Items]
Environmental matter accruals		$ 1,000,000	$ 1,100,000
Lake Region Medical [Member]
Gain Contingencies [Line Items]
Number of administrative consent orders \| consent_order		1
Positive Outcome of Litigation [Member]
Gain Contingencies [Line Items]
Number of patents found infringed upon \| patent	2
Settlement amount	$ 37,500,000