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Employee Retirement Plans Assets of Plans Invested in Classes of Securities (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 16,102 $ 13,589 $ 12,987
Defined Benefit Plan, Net Asset Value of Plan Assets $ 486 $ 368  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 100.00%    
Percentage of Plan Assets 100.00% 100.00%  
Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 1,296,539 $ 1,173,865 $ 1,287,723
Defined Benefit Plan, Net Asset Value of Plan Assets $ 990,888 $ 1,009,160  
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 100.00%    
Percentage of Plan Assets 100.00% 100.00%  
Short Term Investment Fund [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets [1] $ 486 $ 368  
Defined Benefit Plan, Net Asset Value of Plan Assets $ 486 $ 368  
Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 48.00%    
Percentage of Plan Assets 55.00% 51.00%  
Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 17.00%    
Percentage of Plan Assets 26.00% 20.00%  
Fixed Income [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 40.00%    
Percentage of Plan Assets 35.00% 39.00%  
Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 38.00%    
Percentage of Plan Assets 48.00% 55.00%  
Money Market Instruments [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 4.00%    
Percentage of Plan Assets 3.00% 3.00%  
Money Market Instruments [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 32.00%    
Percentage of Plan Assets 12.00% 8.00%  
Other (real estate & commodities) [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 8.00%    
Percentage of Plan Assets 7.00% 7.00%  
Other (real estate & commodities) [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 13.00%    
Percentage of Plan Assets 11.00% 12.00%  
Cash and Cash Equivalents [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%    
Percentage of Plan Assets 3.00% 5.00%  
Equity Securities, U K Market [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 178,093 $ 87,828  
Defined Benefit Plan, Net Asset Value of Plan Assets 79,685 85,730  
Equity Securities, International, Developed [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 145,295 135,186  
Defined Benefit Plan, Net Asset Value of Plan Assets 128,668 131,639  
Equity Securities, international, Emerging [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 7,261 6,803  
Defined Benefit Plan, Net Asset Value of Plan Assets 6,876 6,724  
Equity Securities, Unquoted Private Equity [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,687 3,189  
Defined Benefit Plan, Net Asset Value of Plan Assets 3,687 3,189  
Cash and Cash Equivalents [Member] | Short Term Investment Fund [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 42,857 58,131  
Defined Benefit Plan, Net Asset Value of Plan Assets 18,871 50,515  
U S Large Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,485 3,055  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
U S Mid Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 474 512  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
U S Small Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 475 455  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
International Equity Securities [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4,507 2,917  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
US Government Corporations and Agencies Securities [Member] | Fixed Income [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4,744 4,367  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
High Yield Fixed Income [Member] | Fixed Income [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 809 971  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Real Estate Funds [Member] | Alternative Investment [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 469 539  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Commodities Investment [Member] | Leveraged Loans [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 30,755 11,025  
Defined Benefit Plan, Net Asset Value of Plan Assets 30,755 11,025  
Commodities Investment [Member] | Alternative Investment [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 653 405  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Commodities Investment [Member] | Alternative Investment [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets (131,387) (98,885)  
Defined Benefit Plan, Net Asset Value of Plan Assets (131,484) (98,980)  
Real Estate Funds,Indirect [Domain] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 11,128 10,693  
Defined Benefit Plan, Net Asset Value of Plan Assets 10,937 10,555  
Fixed Income, Government/Corporate, U K [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 347,840 317,621  
Defined Benefit Plan, Net Asset Value of Plan Assets 321,176 292,409  
Fixed Income, Government/Corporate, International [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 46,065 107,882  
Defined Benefit Plan, Net Asset Value of Plan Assets 46,065 107,779  
Fixed Income, Government/Corporate, Index Linked [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 228,699 212,327  
Defined Benefit Plan, Net Asset Value of Plan Assets 224,644 208,122  
Fixed Income, Government/Corporate, Other [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,750 3,812  
Defined Benefit Plan, Net Asset Value of Plan Assets 3,750 3,812  
Fixed Income,Convertible Bonds [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 187 160  
Defined Benefit Plan, Net Asset Value of Plan Assets 187 160  
Real Estate Funds, Direct [Member] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 135,238 121,612  
Defined Benefit Plan, Net Asset Value of Plan Assets 0 0  
Hedge Funds, Equity [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 79,035 61,612  
Defined Benefit Plan, Net Asset Value of Plan Assets 79,035 61,612  
Hedge Fund, Arbitrage&Event [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 83,814 64,961  
Defined Benefit Plan, Net Asset Value of Plan Assets 83,814 64,961  
Hedge Fund, Directional Trading&Fixed Income [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 34,107 30,430  
Defined Benefit Plan, Net Asset Value of Plan Assets 34,107 30,430  
Hedge Fund, Cash & Other [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 48,440 38,099  
Defined Benefit Plan, Net Asset Value of Plan Assets 48,440 38,099  
Hedge Fund, Direct Sourcing [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,675 1,379  
Defined Benefit Plan, Net Asset Value of Plan Assets 1,675 1,379  
Fair Value, Inputs, Level 1 [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 15,616 13,221  
Fair Value, Inputs, Level 1 [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 140,044 26,000  
Fair Value, Inputs, Level 1 [Member] | Short Term Investment Fund [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets [1] 0 0  
Fair Value, Inputs, Level 1 [Member] | Equity Securities, U K Market [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 98,408 2,098  
Fair Value, Inputs, Level 1 [Member] | Equity Securities, International, Developed [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 16,627 3,547  
Fair Value, Inputs, Level 1 [Member] | Equity Securities, international, Emerging [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 385 79  
Fair Value, Inputs, Level 1 [Member] | Equity Securities, Unquoted Private Equity [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member] | Short Term Investment Fund [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 8,135 4,730  
Fair Value, Inputs, Level 1 [Member] | U S Large Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,485 3,055  
Fair Value, Inputs, Level 1 [Member] | U S Mid Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 474 512  
Fair Value, Inputs, Level 1 [Member] | U S Small Cap [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 475 455  
Fair Value, Inputs, Level 1 [Member] | International Equity Securities [Member] | Equity [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4,507 2,917  
Fair Value, Inputs, Level 1 [Member] | US Government Corporations and Agencies Securities [Member] | Fixed Income [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4,744 4,367  
Fair Value, Inputs, Level 1 [Member] | High Yield Fixed Income [Member] | Fixed Income [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 809 971  
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds [Member] | Alternative Investment [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 469 539  
Fair Value, Inputs, Level 1 [Member] | Commodities Investment [Member] | Leveraged Loans [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Commodities Investment [Member] | Alternative Investment [Member] | USPlans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 653 405  
Fair Value, Inputs, Level 1 [Member] | Commodities Investment [Member] | Alternative Investment [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets (4) 0  
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds,Indirect [Domain] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 191 138  
Fair Value, Inputs, Level 1 [Member] | Fixed Income, Government/Corporate, U K [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 12,247 11,203  
Fair Value, Inputs, Level 1 [Member] | Fixed Income, Government/Corporate, International [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Fixed Income, Government/Corporate, Index Linked [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4,055 4,205  
Fair Value, Inputs, Level 1 [Member] | Fixed Income, Government/Corporate, Other [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Fixed Income,Convertible Bonds [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds, Direct [Member] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Hedge Funds, Equity [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Hedge Fund, Arbitrage&Event [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Hedge Fund, Directional Trading&Fixed Income [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Hedge Fund, Cash & Other [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 1 [Member] | Hedge Fund, Direct Sourcing [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 165,506 138,610  
Fair Value, Inputs, Level 2 [Member] | Equity Securities, U K Market [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Equity Securities, International, Developed [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Equity Securities, international, Emerging [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Equity Securities, Unquoted Private Equity [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member] | Short Term Investment Fund [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 15,851 2,886  
Fair Value, Inputs, Level 2 [Member] | Commodities Investment [Member] | Leveraged Loans [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Commodities Investment [Member] | Alternative Investment [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds,Indirect [Domain] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Fixed Income, Government/Corporate, U K [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 14,417 14,009  
Fair Value, Inputs, Level 2 [Member] | Fixed Income, Government/Corporate, International [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 103  
Fair Value, Inputs, Level 2 [Member] | Fixed Income, Government/Corporate, Index Linked [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Fixed Income, Government/Corporate, Other [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Fixed Income,Convertible Bonds [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds, Direct [Member] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 135,238 121,612  
Fair Value, Inputs, Level 2 [Member] | Hedge Funds, Equity [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Hedge Fund, Arbitrage&Event [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Hedge Fund, Directional Trading&Fixed Income [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Hedge Fund, Cash & Other [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 [Member] | Hedge Fund, Direct Sourcing [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 101 95  
Fair Value, Inputs, Level 3 [Member] | Equity Securities, U K Market [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Equity Securities, International, Developed [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Equity Securities, international, Emerging [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Equity Securities, Unquoted Private Equity [Member] | Equity [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member] | Short Term Investment Fund [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Commodities Investment [Member] | Leveraged Loans [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Commodities Investment [Member] | Alternative Investment [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 101 95  
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds,Indirect [Domain] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Fixed Income, Government/Corporate, U K [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Fixed Income, Government/Corporate, International [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Fixed Income, Government/Corporate, Index Linked [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Fixed Income, Government/Corporate, Other [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Fixed Income,Convertible Bonds [Member] | Fixed Income [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds, Direct [Member] | Real Estate Funds [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Hedge Funds, Equity [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Hedge Fund, Arbitrage&Event [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Hedge Fund, Directional Trading&Fixed Income [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Hedge Fund, Cash & Other [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 [Member] | Hedge Fund, Direct Sourcing [Member] | Hedge Funds, Multi-strategy [Member] | Non US Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 0 $ 0  
[1] Represents collective short term investment fund, composed of high-grade money market instruments with short maturities.