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Accumulated Other Comprehensive Losses (Components of Accumulated Other Comprehensive Losses, Net Of Taxes) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total accumulated other comprehensive losses $ (8,208) $ (10,631) $ (9,599) $ (10,739)
Currency translation adjustments        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total accumulated other comprehensive losses (6,701) (6,843) (5,537)  
Pension and other benefits        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total accumulated other comprehensive losses (2,880) (4,253) (3,829)  
Derivatives accounted for as hedges        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total accumulated other comprehensive losses 4 (85) 3  
Total accumulated other comprehensive losses        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total accumulated other comprehensive losses $ (9,577) $ (11,181) $ (9,363) $ (10,111)