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Employee Benefits (Schedule Of Amounts Recognized In The Consolidated Balance Sheet) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Noncurrent liabilities $ (391) $ (360)
Other Postretirement Benefits Plan [Member] | United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities (8) (8)
Noncurrent liabilities (55) (57)
Net amount recognized (63) (65)
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities 0 0
Noncurrent liabilities (5) (5)
Net amount recognized (5) (5)
Pension Plan [Member] | United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities (2) (2)
Noncurrent liabilities (183) (175)
Net amount recognized (185) (177)
Pension Plan [Member] | Foreign Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities (4) (2)
Noncurrent liabilities (148) (123)
Net amount recognized $ (152) $ (125)