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Employee Benefit Plans (Assumptions for Benefit Obligation) (Details)
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 1.50% 2.00%
Minimum    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase 1.50% 1.75%
Maximum    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase 5.00% 5.00%
UNITED STATES | Pension Benefits    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase 5.00% 5.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2.75% 3.45%