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Employee Retirement Plans Summary of the Basis Used to Measure Pension Plans' Assets at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
USPlans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 16,744 $ 14,634 $ 16,102
Defined Benefit Plan, Net Asset Value of Plan Assets 347 175  
Non US Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,231,181 1,141,381 $ 1,296,539
Defined Benefit Plan, Net Asset Value of Plan Assets 926,083 859,993  
Short Term Investment Fund | USPlans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount [1] 347 175  
Defined Benefit Plan, Net Asset Value of Plan Assets [1] 347 175  
Short Term Investment Fund | Non US Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 44,748 28,434  
Defined Benefit Plan, Net Asset Value of Plan Assets 23,732 21,453  
Equity Securities | USPlans | U S Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,957 2,615  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Equity Securities | USPlans | U S Mid Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 417 329  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Equity Securities | USPlans | U S Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 418 326  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Equity Securities | USPlans | International Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,657 2,937  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Equity Securities | Non US Plans | Equity Securities, U K Market      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 101,922 155,687  
Defined Benefit Plan, Net Asset Value of Plan Assets 13,092 76,749  
Equity Securities | Non US Plans | Equity Securities, International, Developed      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 165,709 99,872  
Defined Benefit Plan, Net Asset Value of Plan Assets 152,539 85,375  
Equity Securities | Non US Plans | Equity Securities, Unquoted Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 123 1,752  
Defined Benefit Plan, Net Asset Value of Plan Assets 123 1,752  
Equity Securities | Non US Plans | Equity Securities, international, Emerging      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 11,653 7,488  
Defined Benefit Plan, Net Asset Value of Plan Assets 11,003 6,897  
Fixed Income | USPlans | Government/Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 4,992 5,994  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Fixed Income | USPlans | High Yield Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,260 1,102  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 6,367 650  
Defined Benefit Plan, Net Asset Value of Plan Assets 6,367 650  
Fixed Income | Non US Plans | Fixed Income,Convertible Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 177 188  
Defined Benefit Plan, Net Asset Value of Plan Assets 177 188  
Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Index Linked      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 189,463 47,873  
Defined Benefit Plan, Net Asset Value of Plan Assets 187,378 44,259  
Fixed Income | Non US Plans | Fixed Income, Government/Corporate, International      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 86,208 75,980  
Defined Benefit Plan, Net Asset Value of Plan Assets 86,208 75,980  
Fixed Income | Non US Plans | Fixed Income, Government/Corporate, U K      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 189,513 468,608  
Defined Benefit Plan, Net Asset Value of Plan Assets 172,401 449,969  
Real Estate Funds | Non US Plans | Real Estate Funds, Direct      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 154,494 148,551  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Real Estate Funds | Non US Plans | Real Estate Funds,Indirect      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 8,155 10,812  
Defined Benefit Plan, Net Asset Value of Plan Assets 415 1,326  
Hedge Funds, Multi-strategy | Non US Plans | Hedge Funds, Equity      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 21,683 73,783  
Defined Benefit Plan, Net Asset Value of Plan Assets 21,683 73,783  
Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Arbitrage&Event      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 29,284 73,261  
Defined Benefit Plan, Net Asset Value of Plan Assets 29,284 73,261  
Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Directional Trading&Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 9,361 44,091  
Defined Benefit Plan, Net Asset Value of Plan Assets 9,361 44,091  
Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Cash & Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 163,058 21,719  
Defined Benefit Plan, Net Asset Value of Plan Assets 163,058 21,719  
Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Direct Sourcing      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 2,269 2,289  
Defined Benefit Plan, Net Asset Value of Plan Assets 2,269 2,289  
Leveraged Loans | Non US Plans | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 21,635 18,295  
Defined Benefit Plan, Net Asset Value of Plan Assets 21,635 18,295  
Alternative Investment [Member] | USPlans | Real Estate Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,358 591  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Alternative Investment [Member] | USPlans | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 338 565  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Alternative Investment [Member] | Non US Plans | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 25,359 (137,952)  
Defined Benefit Plan, Net Asset Value of Plan Assets 25,358 (138,043)  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | USPlans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 16,397 14,459  
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 137,260 114,018  
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] | Short Term Investment Fund | Non US Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 18,142 4,325  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | USPlans | U S Large Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,957 2,615  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | USPlans | U S Mid Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 417 329  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | USPlans | U S Small Cap      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 418 326  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | USPlans | International Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,657 2,937  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | Non US Plans | Equity Securities, U K Market      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 88,830 78,938  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | Non US Plans | Equity Securities, International, Developed      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 13,170 14,497  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities | Non US Plans | Equity Securities, Unquoted Private Equity      
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] | Equity Securities | Non US Plans | Equity Securities, international, Emerging      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 650 591  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income | USPlans | Government/Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 4,992 5,994  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income | USPlans | High Yield Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,260 1,102  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Other      
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 | Non US Plans | Fixed Income,Convertible Bonds      
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 | Non US Plans | Fixed Income, Government/Corporate, Index Linked      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 2,085 3,614  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, International      
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 | Non US Plans | Fixed Income, Government/Corporate, U K      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 14,245 11,860  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Funds | Non US Plans | Real Estate Funds, Direct      
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 | Non US Plans | Real Estate Funds,Indirect      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 137 188  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Hedge Funds, Multi-strategy | Non US Plans | Hedge Funds, Equity      
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 Funds, Multi-strategy | Non US Plans | Hedge Fund, Arbitrage&Event      
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 Funds, Multi-strategy | Non US Plans | Hedge Fund, Directional Trading&Fixed Income      
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 Funds, Multi-strategy | Non US Plans | Hedge Fund, Cash & Other      
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 Funds, Multi-strategy | Non US Plans | Hedge Fund, Direct Sourcing      
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 | Commodities Contracts      
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] | USPlans | Real Estate Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,358 591  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Alternative Investment [Member] | USPlans | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 338 565  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Alternative Investment [Member] | Non US Plans | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1 5  
Significant Observable Inputs (Level 2) | Non US Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 167,838 167,284  
Significant Observable Inputs (Level 2) | Short Term Investment Fund | Non US Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 2,874 2,656  
Significant Observable Inputs (Level 2) | Equity Securities | Non US Plans | Equity Securities, U K Market      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Equity Securities | Non US Plans | Equity Securities, International, Developed      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Equity Securities | Non US Plans | Equity Securities, Unquoted Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Equity Securities | Non US Plans | Equity Securities, international, Emerging      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Fixed Income | Non US Plans | Fixed Income,Convertible Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Index Linked      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, International      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, U K      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 2,867 6,779  
Significant Observable Inputs (Level 2) | Real Estate Funds | Non US Plans | Real Estate Funds, Direct      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 154,494 148,551  
Significant Observable Inputs (Level 2) | Real Estate Funds | Non US Plans | Real Estate Funds,Indirect      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 7,603 9,298  
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans | Hedge Funds, Equity      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Arbitrage&Event      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Directional Trading&Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Cash & Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Hedge Funds, Multi-strategy | Non US Plans | Hedge Fund, Direct Sourcing      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Observable Inputs (Level 2) | Leveraged Loans | Non US Plans | Commodities Contracts      
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 | Commodities Contracts      
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 86  
Significant Unobservable Inputs (Level 3) | Short Term Investment Fund | Non US Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Equity Securities | Non US Plans | Equity Securities, U K Market      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Equity Securities | Non US Plans | Equity Securities, International, Developed      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Equity Securities | Non US Plans | Equity Securities, Unquoted Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Equity Securities | Non US Plans | Equity Securities, international, Emerging      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Non US Plans | Fixed Income,Convertible Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, Index Linked      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, International      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Non US Plans | Fixed Income, Government/Corporate, U K      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Real Estate Funds | Non US Plans | Real Estate Funds, Direct      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Real Estate Funds | Non US Plans | Real Estate Funds,Indirect      
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 | Hedge Funds, Equity      
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 | Hedge Fund, Arbitrage&Event      
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 | Hedge Fund, Directional Trading&Fixed Income      
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 | Hedge Fund, Cash & Other      
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 | Hedge Fund, Direct Sourcing      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 0 0  
Significant Unobservable Inputs (Level 3) | Leveraged Loans | Non US Plans | Commodities Contracts      
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 | Commodities Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 0 $ 86  
[1]
Represents collective short term investment fund, composed of high-grade money market instruments with short maturities.