Employee Retirement Plans Summary of the Basis Used to Measure Pension Plans' Assets at Fair Value (Details) - USD ($) $ in Thousands		Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 17,455	$ 16,744	$ 14,634
Defined Benefit Plan, Net Asset Value of Plan Assets		533	347
Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,296,516	1,231,181	$ 1,141,381
Defined Benefit Plan, Net Asset Value of Plan Assets		1,100,384	926,083
Short Term Investment Fund | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	533	347
Defined Benefit Plan, Net Asset Value of Plan Assets	[1]	533	347
Real Estate Funds | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,063	1,358
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
Hedge Funds, Multi-strategy | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44,097	21,683
Defined Benefit Plan, Net Asset Value of Plan Assets		44,097	21,683
Leveraged Loans | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		28,720	21,635
Defined Benefit Plan, Net Asset Value of Plan Assets		28,720	21,635
Alternative Investment [Member] | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		(104,518)	25,359
Defined Benefit Plan, Net Asset Value of Plan Assets		(104,523)	25,358
U S Large Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3,443	3,957
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
U S Mid Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		407	417
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
U S Small Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		489	418
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
International Equity Securities | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4,198	3,657
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
Government/Corporate | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5,517	4,992
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
High Yield Fixed Income | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,211	1,260
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
Commodities Contracts | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		594	338
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
Cash and Cash Equivalents | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		36,537	44,748
Defined Benefit Plan, Net Asset Value of Plan Assets		26,052	23,732
Equity Securities, U K Market | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		8,615	101,922
Defined Benefit Plan, Net Asset Value of Plan Assets		6,868	13,092
Equity Securities, International, Developed | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		110,718	165,709
Defined Benefit Plan, Net Asset Value of Plan Assets		107,642	152,539
Equity Securities, international, Emerging | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		34,417	11,653
Defined Benefit Plan, Net Asset Value of Plan Assets		33,999	11,003
Equity Securities, Unquoted Private Equity | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,792	123
Defined Benefit Plan, Net Asset Value of Plan Assets		1,791	123
Fixed Income, Government/Corporate, U K | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		264,703	189,513
Defined Benefit Plan, Net Asset Value of Plan Assets		248,373	172,401
Fixed Income, Government/Corporate, International | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		141,030	86,208
Defined Benefit Plan, Net Asset Value of Plan Assets		141,030	86,208
Fixed Income, Government/Corporate, Index Linked | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		330,360	189,463
Defined Benefit Plan, Net Asset Value of Plan Assets		327,415	187,378
Fixed Income, Government/Corporate, Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		8,296	6,367
Defined Benefit Plan, Net Asset Value of Plan Assets		8,296	6,367
Fixed Income,Convertible Bonds | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		214	177
Defined Benefit Plan, Net Asset Value of Plan Assets		214	177
Real Estate Funds, Direct | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		156,588	154,494
Defined Benefit Plan, Net Asset Value of Plan Assets		0	0
Real Estate Funds,Indirect | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9,283	8,155
Defined Benefit Plan, Net Asset Value of Plan Assets		4,746	415
Hedge Fund, Arbitrage&Event | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16,594	29,284
Defined Benefit Plan, Net Asset Value of Plan Assets		16,594	29,284
Hedge Fund, Directional Trading&Fixed Income | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9,721	9,361
Defined Benefit Plan, Net Asset Value of Plan Assets		9,721	9,361
Hedge Fund, Cash & Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		196,952	163,058
Defined Benefit Plan, Net Asset Value of Plan Assets		196,952	163,058
Hedge Fund, Direct Sourcing | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,397	2,269
Defined Benefit Plan, Net Asset Value of Plan Assets		2,397	2,269
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16,922	16,397
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		34,227	137,260
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short Term Investment Fund | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Funds | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,063	1,358
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Funds, Multi-strategy | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Leveraged Loans | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Alternative Investment [Member] | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5	1
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U S Large Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3,443	3,957
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U S Mid Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		407	417
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U S Small Cap | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		489	418
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International Equity Securities | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4,198	3,657
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Government/Corporate | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5,517	4,992
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | High Yield Fixed Income | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,211	1,260
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commodities Contracts | USPlans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		594	338
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and Cash Equivalents | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9,653	18,142
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities, U K Market | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,747	88,830
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities, International, Developed | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3,076	13,170
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities, international, Emerging | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		418	650
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities, Unquoted Private Equity | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income, Government/Corporate, U K | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16,330	14,245
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income, Government/Corporate, International | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income, Government/Corporate, Index Linked | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,945	2,085
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income, Government/Corporate, Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income,Convertible Bonds | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Funds, Direct | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Funds,Indirect | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52	137
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Fund, Arbitrage&Event | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Fund, Directional Trading&Fixed Income | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Fund, Cash & Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Fund, Direct Sourcing | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		161,905	167,838
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Leveraged Loans | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Alternative Investment [Member] | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Cash and Cash Equivalents | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		832	2,874
Significant Observable Inputs (Level 2) | Equity Securities, U K Market | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Equity Securities, International, Developed | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Equity Securities, international, Emerging | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Equity Securities, Unquoted Private Equity | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Fixed Income, Government/Corporate, U K | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	2,867
Significant Observable Inputs (Level 2) | Fixed Income, Government/Corporate, International | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Fixed Income, Government/Corporate, Index Linked | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Fixed Income, Government/Corporate, Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Fixed Income,Convertible Bonds | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Real Estate Funds, Direct | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		156,588	154,494
Significant Observable Inputs (Level 2) | Real Estate Funds,Indirect | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4,485	7,603
Significant Observable Inputs (Level 2) | Hedge Fund, Arbitrage&Event | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Hedge Fund, Directional Trading&Fixed Income | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Hedge Fund, Cash & Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Observable Inputs (Level 2) | Hedge Fund, Direct Sourcing | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Hedge Funds, Multi-strategy | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Leveraged Loans | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Alternative Investment [Member] | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Cash and Cash Equivalents | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Equity Securities, U K Market | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Equity Securities, International, Developed | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Equity Securities, international, Emerging | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Equity Securities, Unquoted Private Equity | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Fixed Income, Government/Corporate, U K | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Fixed Income, Government/Corporate, International | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Fixed Income, Government/Corporate, Index Linked | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Fixed Income, Government/Corporate, Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Fixed Income,Convertible Bonds | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Real Estate Funds, Direct | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Real Estate Funds,Indirect | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Hedge Fund, Arbitrage&Event | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Hedge Fund, Directional Trading&Fixed Income | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Hedge Fund, Cash & Other | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Significant Unobservable Inputs (Level 3) | Hedge Fund, Direct Sourcing | Non US Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	$ 0

[1] Represents collective short term investment fund, composed of high-grade money market instruments with short maturities.