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Restructuring Charges (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Jun. 26, 2020
Dec. 31, 2018
Mar. 31, 2018
Manufacturing Facility        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, expected cost remaining $ 71      
Restructuring and related cost, expected cost 131      
Manufacturing Facility | Employee Severance        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, incurred cost 66      
Manufacturing Facility | Asset Impairments Charges        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, incurred cost 43      
Manufacturing Facility | Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, incurred cost 22      
EMEA        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, total costs to date       $ 83
Expected reduction in overhead costs     $ 50  
Workforce Reduction Plan        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, total costs to date 74      
Restructuring and related cost, expected cost 148      
Restructuring and related cost, incurred cost $ 50      
Workforce Reduction Plan | Employee termination costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, total costs to date   $ 102    
Restructuring and related cost, expected cost remaining   $ 39