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Pension And Postretirement Benefits (Schedule Of Pension Plan Target Allocations And Weighted-Average Asset Allocations By Asset Category) (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 5.31% 5.34% 6.49%
Discount rate 1.07% 1.70% 2.42%
Interest credit rate 0.29% 0.22% 0.84%
Rate of compensation increase 3.10% 2.89% 3.06%
Foreign Plan [Member] | Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate     3.30%
UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 7.25% 7.25% 7.75%
Discount rate 2.62% 3.34% 4.36%
Interest credit rate 0.93% 2.83% 2.40%
UNITED STATES | Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.30% 3.20% 4.30%
Equity securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
DefinedBenefitPlantargetallocationrange 15%-75%    
Actual asset allocation, percentage 44.00% 43.00%  
Equity securities [Member] | Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 28.00%    
Equity securities [Member] | UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 63.00%    
Equity securities [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 35.00%    
Equity securities [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 75.00%    
Fixed income securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
DefinedBenefitPlantargetallocationrange 15%-75%    
Actual asset allocation, percentage 26.00% 26.00%  
Fixed income securities [Member] | Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 34.00%    
Fixed income securities [Member] | UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 16.00%    
Fixed income securities [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 15.00%    
Fixed income securities [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 35.00%    
Alternative assets/Other [Member]      
Defined Benefit Plan Disclosure [Line Items]      
DefinedBenefitPlantargetallocationrange 0%-45%    
Actual asset allocation, percentage 27.00% 29.00%  
Alternative assets/Other [Member] | Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 36.00%    
Alternative assets/Other [Member] | UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 17.00%    
Alternative assets/Other [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 10.00%    
Alternative assets/Other [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 35.00%    
Money market [Member]      
Defined Benefit Plan Disclosure [Line Items]      
DefinedBenefitPlantargetallocationrange 0%-10%    
Actual asset allocation, percentage 3.00% 2.00%  
Cash and Cash Equivalents [Domain] | Foreign Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 2.00%    
Cash [Member] | UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 4.00%    
Cash [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 0.00%    
Cash [Member] | UNITED STATES | Pension Plan [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 10.00%