SHAREHOLDERS' EQUITY (Summary Of Share-Based Incentive Plan Grant Activity For Options and SAR's) (Details) - SARs - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
Sep. 26, 2020	Dec. 28, 2019
Shares
Outstanding (in shares)	817,790
Granted (in shares)	181,177
Exercised (in shares)	(299,816)
Forfeited (in shares)	(92,352)
Expired (in shares)	(3,308)
Outstanding (in shares)	603,491	817,790
Exercisable (in shares)	197,612
Weighted Average Exercise Price
Outstanding, weighted average exercise price (in dollars per share)	$ 73.34
Granted, weighted average exercise price (in dollars per share)	88.25
Exercised, weighted average exercise price (in dollars per share)	69.29
Forfeited, weighted average exercise price (in dollars per share)	76.99
Expired, weighted average exercise price (in dollars per share)	67.38
Outstanding, weighted average exercise price (in dollars per share)	79.00	$ 73.34
Exercisable, weighted average exercise price (in dollars per share)	$ 70.73
Outstanding, weighted average remaining contractual term	4 years 6 months	6 years
Exercisable, weighted average remaining contractual term	4 years 6 months
Outstanding, aggregate intrinsic value	$ 5.7	$ 9.9
Exercisable, aggregate intrinsic value	$ 4.4

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.