Employee Stock Benefit Plans (Schedule Of Options Outstanding And Expected To Vest) (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 01, 2021 USD ($) $ / shares shares
Number Of  Shares (in millions)
Number of shares, outstanding at the beginning of year (in shares) | shares	1.1
Number of units, options granted (in shares) | shares	0.2
Number of units, option exercised (in shares) | shares	(0.7)
Number of units, cancelled and forfeited (in shares) | shares	0.0
Number of shares, outstanding at the end of year (in shares) | shares	0.6
Number of units, options exercisable (in shares) | shares	0.2
Weighted- Average Exercise  Price per Share
Weighted-average exercise price per share, outstanding at the beginning of year (in dollars per share) | $ / shares	$ 29.96
Weighted-average exercise price per share, options granted (in dollars per share) | $ / shares	41.58
Weighted-average exercise price per share, options exercised (in dollars per share) | $ / shares	29.01
Weighted-average exercise price per share, cancelled and forfeited (in dollars per share) | $ / shares	28.08
Weighted-average exercise price per share, outstanding at the end of year (in dollars per share) | $ / shares	35.42
Weighted-average exercise price per share, options exercisable (in dollars per share) | $ / shares	$ 27.88
Weighted-average remaining contractual term, outstanding (in years)	5 years 1 month 6 days
Weighted-average remaining contractual term, options exercisable (in years)	1 year 2 months 12 days
Aggregate intrinsic value, outstanding | $	$ 18.6
Aggregate intrinsic value, options exercisable | $	$ 9.0