Retirement and Post Retirement Health Care Plans (Schedule Of Defined Benefit Pension Assets Investment) (Details)	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	100.00%
Target Return	4.60%
Equity investments, Actual Allocation	100.00%	100.00%
Equity Investments
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	37.70%
Fixed income, Target Return minimum	6.20%
Fixed income, Target Return maximum	7.50%
Equity investments, Actual Allocation	35.70%	72.40%
Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	51.60%
Fixed income, Target Return minimum	2.50%
Fixed income, Target Return maximum	5.80%
Equity investments, Actual Allocation	55.00%	26.80%
Other
Defined Benefit Plan Disclosure [Line Items]
Equity investments, Target Allocation	10.70%
Fixed income, Target Return minimum	1.50%
Fixed income, Target Return maximum	6.20%
Equity investments, Actual Allocation	9.30%	0.80%