Retirement Plans (Schedule Of Defined Benefit Pension Assets Investment) (Details)	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	100.00%
Target Return	6.60%
Equity investments, Actual Allocation	100.00%	100.00%
Equity Investments
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	47.70%
Fixed income, Target Return minimum	7.30%
Fixed income, Target Return maximum	8.90%
Equity investments, Actual Allocation	41.10%	35.70%
Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	38.10%
Fixed income, Target Return minimum	2.90%
Fixed income, Target Return maximum	7.00%
Equity investments, Actual Allocation	44.70%	55.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	14.20%
Fixed income, Target Return minimum	0.50%
Fixed income, Target Return maximum	7.00%
Equity investments, Actual Allocation	14.20%	9.30%