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Pension Benefit Plans (Weighted Average Assumptions Used To Determine Net Periodic Pension Cost) (Details) - Pension benefit plans
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
U.S. Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.20% 4.30%  
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Rate of compensation increase 4.00% 4.00%  
Non-U.S. Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.40% 2.10%  
Expected long-term return on plan assets 3.40% 3.90%  
Rate of compensation increase 2.40% 2.40%