Stock Plans (Summary of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Millions	6 Months Ended
	Jul. 05, 2020 USD ($) $ / shares shares
Stock option activity
Number of Shares, Outstanding at beginning of period | shares	1,535
Number of Shares, Granted | shares	266
Number of Shares, Exercised | shares	(196)
Number of Shares, Forfeited | shares	(65)
Number of Shares, Outstanding at end of period | shares	1,540
Number of Shares, Exercisable at end of period | shares	1,123
Weighted-Average Price, Outstanding at beginning of period | $ / shares	$ 60.42
Weighted-Average Price, Granted | $ / shares	86.87
Weighted-Average Price, Exercised | $ / shares	51.35
Weighted-Average Price, Forfeited | $ / shares	87.41
Weighted-Average Price, Outstanding at end of period | $ / shares	65.00
Weighted-Average Price, Exercisable at end of period | $ / shares	$ 56.75
Weighted-Average Remaining Contractual Term in Years, Outstanding at end of period	3 years 7 months 6 days
Weighted-Average Remaining Contractual Term in Years, Exercisable at end of period	2 years 8 months 12 days
Total Intrinsic Value, Outstanding at end of period | $	$ 50.7
Total Intrinsic Value, Exercisable at end of period | $	$ 46.2