Retirement Benefit Plans (Weighted-Average Asset Allocations) (Details)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	100.00%	100.00%
UNITED STATES | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligations	2.30%	3.30%	4.00%
Expected return on plan assets	7.00%	7.00%	7.00%
UNITED STATES | United States Large Stocks [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	19.20%	32.90%
UNITED STATES | Defined Benefit Plan, Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	55.90%	63.70%
UNITED STATES | Defined Benefit Plan, Equity Securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	60.00%
UNITED STATES | Defined Benefit Plan, Debt Security [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	44.10%	36.30%
UNITED STATES | Cash and Money Market Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
UNITED STATES | Guaranteed Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
UNITED STATES | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	100.00%	100.00%
Foreign Plan [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligations	1.40%	1.90%	2.60%
Expected return on plan assets	2.60%	2.60%	3.00%
Foreign Plan [Member] | Defined Benefit Plan, Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	40.10%	29.00%
Foreign Plan [Member] | Defined Benefit Plan, Debt Security [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	25.90%	18.00%
Foreign Plan [Member] | Cash and Money Market Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	5.40%	6.00%
Foreign Plan [Member] | Guaranteed Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	20.30%	45.00%
Foreign Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	8.30%	2.00%
JAPAN | Equity Securities, Companies Outside of Japan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	7.00%
JAPAN | Equity Securities, Companies Outside of Japan [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	7.10%	8.00%
JAPAN | Defined Benefit Plan, Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	3.00%
JAPAN | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	3.10%	4.00%
Australia | Defined Benefit Plan, Real Estate [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	8.00%	7.00%
BELGIUM | Equity Securities, Large-cap European Companies [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	27.10%	25.00%
BELGIUM | Defined Benefit Plan, Equity Securities [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	62.00%
BELGIUM | Cash and Money Market Investments [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	1.00%
BELGIUM | Equity Securities, Small-cap European Companies [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	18.50%	18.00%
BELGIUM | Money Market Funds [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	13.70%	14.00%