Stock Plans (Narrative) (Details)	12 Months Ended
Jan. 03, 2021 USD ($) plan $ / shares shares	Dec. 29, 2019 USD ($) $ / shares shares	Dec. 30, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock-based Compensation Plans \| plan	1
Total income tax benefit recognized for stock-based compensation	$ 17,200,000	$ 11,600,000	$ 13,600,000
Stock-based compensation costs capitalized as part of inventory	400,000	300,000
Aggregate intrinsic value for stock options outstanding	$ 66,400,000
Weighted average remaining contractual term of options (in years)	3 years 10 months 24 days
Aggregate intrinsic value for stock options exercisable	$ 43,900,000
Weighted average remaining contractual term of options exercisable (in years)	2 years 7 months 6 days
Number of shares vested and expected to vest in the future \| shares	1,000,000.0
Aggregate intrinsic value of vested and expected to vest stock options	$ 66,400,000
Weighted average remaining contractual term for options vested and expected to vest	3 years 10 months 24 days
Total pre-tax stock-based compensation expense	$ 29,126,000	31,514,000	$ 28,767,000
Deferred compensation liability	$ 9,400,000
Acceleration of executive compensation		$ 7,700,000
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares			$ 73.23
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares	1,948	10,116
Total pre-tax stock-based compensation expense	$ 6,100,000	$ 5,600,000	$ 7,700,000
Shares/units granted \| shares	0		37,281
Awards/units outstanding \| shares	31,207
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares	$ 91.75	$ 95.84	$ 72.17
Total pre-tax stock-based compensation expense	$ 800,000	$ 700,000	$ 800,000
Shares/units granted \| shares	8,333	7,301	11,088
Stock award program for non-employees Directors, fair market value	$ 100,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares	$ 84.83
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares	40,000
Fair value of restricted stock awards vested	$ 14,000,000.0	$ 12,000,000.0	$ 10,400,000
Total pre-tax stock-based compensation expense	10,800,000	$ 12,700,000	$ 11,700,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	$ 14,300,000
Shares/units granted \| shares	184,000
Awards/units outstanding \| shares	296,000	345,000
Weighted-average period for recognition of unrecognized compensation cost, years	1 year 4 months 24 days
Option vesting period (in years)	3 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under plan \| shares	5,000,000.0
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares	$ 105.23	$ 82.25	$ 69.57
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date	95.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	10.00%
Shares/units granted \| shares	38,727	33,843	21,321
Shares available for grant under employee stock purchase plan \| shares	800,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of options \| $ / shares	$ 18.98	$ 22.63	$ 17.56
Total intrinsic value of options exercised	$ 51,100,000	$ 19,100,000	$ 35,000,000.0
Cash received from option exercises	37,700,000	19,700,000	24,800,000
Total pre-tax stock-based compensation expense	3,600,000	$ 6,700,000	$ 5,400,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	$ 4,700,000
Weighted-average period for recognition of unrecognized compensation cost, years	1 year 9 months 18 days
Option vesting period (in years)		3 years
Stock Options Expiration Period After Date of Grant		7 years
Performance Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock granted (per share) \| $ / shares	$ 95.43	$ 92.95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares	29,943
Total pre-tax stock-based compensation expense	$ 7,900,000	$ 5,900,000
Shares/units granted \| shares	49,138	76,218
Awards/units outstanding \| shares	121,759

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