Pension Plans and Postretirement Benefits (Narrative) (Details)		12 Months Ended
	Jan. 01, 2020 plan	Dec. 26, 2021	Jan. 03, 2021 USD ($)	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($) participant
Defined Benefit Plan Disclosure [Line Items]
Actuarial amortization period	9 years
Non-cash reduction to stockholders' equity			$ 347,800,000	$ 323,100,000
Deferred tax on non-cash reductions to stockholders' equity			110,500,000	102,500,000
Employer contributions to 401(k) plans			$ 13,800,000	13,400,000	$ 11,900,000
Assumed rate of increase in the per capita cost of covered benefits 2020			6.25%
Assumed rate of decrease in the per capita cost of covered benefits by 2027			5.00%
Effect of one percentage point increase in assumed health care cost trend rates on annual service and interest costs (less than)			$ 100,000
Effect of one percentage point increase in assumed health care cost trend rates on postretirement benefit obligation			200,000
Effect of one percentage point decrease in assumed health care cost trend rates on annual service and interest costs			100,000
Effect of one percentage point decrease in assumed health care cost trend rates on postretirement benefit obligation			200,000
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Annuity premium			0	0
Minimum liability adjustment to be recognized for the pension plans, net gain (loss)			26,700,000
Minimum liability adjustment to be recognized for the pension plans, net prior service credit			3,500,000
Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period (in millions)			0	0	$ 0
Unrecognized net gain			900,000	$ 2,200,000
Retiree Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Minimum liability adjustment to be recognized for the pension plans, net gain (loss)			100,000
Unrecognized net gain			900,000
Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return				7.80%	8.00%
Service cost - benefits earned during the period (in millions)			$ 9,300,000	$ 8,500,000	$ 9,800,000
Domestic | Pension Plan | Equity instruments
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets			38.00%
Domestic | Pension Plan | Fixed income instruments
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets			51.00%
Domestic | Pension Plan | Alternatives
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets			11.00%
Domestic | Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return			6.71%
Domestic | Pension Plan | Minimum | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return		6.71%
Domestic | Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return			7.80%
Domestic | Pension Plan | Maximum | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return		7.80%
Foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period (in millions)			$ 1,100,000	$ 900,000	$ 900,000
Foreign | Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return			1.00%	1.00%	1.00%
Foreign | Pension Plan | Minimum | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return		0.80%
Foreign | Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return			3.00%	3.80%	4.50%
Foreign | Pension Plan | Maximum | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return		2.50%
Inactive Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial amortization period	17 years
Qualified plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Annuity premium					$ 17,800,000
Number of plan participants | participant					321
Qualified plan | Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Number of plans | plan	2
Percentage of employees under defined benefit pension plan			10.00%
Settlements			$ 24,900,000	$ 17,200,000	$ 18,600,000
Qualified plan | Inactive Plan
Defined Benefit Plan Disclosure [Line Items]
Number of plans | plan	1