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Employee Benefit Plans Pension Plan Assets by Category (Details)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Actual Plan Asset Allocations 100.00% 100.00%
United States Pension Plans of US Entity, Defined Benefit [Member] | Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 35% - 65%  
Defined Benefit Plan, Actual Plan Asset Allocations 38.30% 50.80%
United States Pension Plans of US Entity, Defined Benefit [Member] | Fixed Income Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 35% - 50%  
Defined Benefit Plan, Actual Plan Asset Allocations 52.30% 35.50%
United States Pension Plans of US Entity, Defined Benefit [Member] | Hedge Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 0% - 15%  
Defined Benefit Plan, Actual Plan Asset Allocations 8.50% 13.50%
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 0% - 5%  
Defined Benefit Plan, Actual Plan Asset Allocations 0.90% 0.20%
Foreign Pension Plans, Defined Benefit [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Actual Plan Asset Allocations 100.00% 100.00%
Foreign Pension Plans, Defined Benefit [Member] | Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 30% - 40%  
Defined Benefit Plan, Actual Plan Asset Allocations 34.80% 44.50%
Foreign Pension Plans, Defined Benefit [Member] | Fixed Income Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 50% - 60%  
Defined Benefit Plan, Actual Plan Asset Allocations 55.10% 47.90%
Foreign Pension Plans, Defined Benefit [Member] | Hedge Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% 0.00%
Foreign Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Allocation Percentage 0% - 10%  
Defined Benefit Plan, Actual Plan Asset Allocations 10.10% 7.60%