Pension Plans and Postretirement Benefits (Percentage of Plan Assets) (Details) - Pension Benefits	Dec. 29, 2019	Dec. 30, 2018
Equity instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation		47.00%
United States
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
United States | Equity instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	49.00%	51.00%
United States | Fixed income instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	31.00%	34.00%
United States | Alternatives and other
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	20.00%	15.00%
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Foreign Plan | Equity instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	56.00%	53.00%
Foreign Plan | Fixed income instruments
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	25.00%	27.00%
Foreign Plan | Alternatives and other
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	19.00%	20.00%