Stock Plans (Summary of Restricted Stock Award Activity) (Details) shares in Thousands	12 Months Ended
Jan. 03, 2021 $ / shares shares
Restricted Stock Units (RSUs) [Member]
Restricted stock award activity
Performance factor percentage minimum	0.00%
Performance factor percentage maximum	200.00%
Restricted Stock Awards [Member]
Restricted stock award activity
Nonvested at beginning of year \| shares	345
Shares, granted \| shares	184
Shares, vested \| shares	(193)
Shares, forfeited \| shares	(40)
Nonvested at end of year \| shares	296
Weighted-average grant-date fair value, nonvested at beginning of year (per share) \| $ / shares	$ 78.69
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares	84.83
Weighted-average grant-date fair value, vested (per share) \| $ / shares	72.28
Weighted-average grant-date fair value, forfeited (per share) \| $ / shares	86.32
Weighted-average grant-date fair value, nonvested at end of year (per share) \| $ / shares	$ 85.67

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Performance Factor Percentage Minimum

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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-Publisher FASB
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-Topic 718
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-Section 50
-Paragraph 2
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Publisher FASB
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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-Publisher FASB
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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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