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Restructuring (Narrative) (Detail)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Employee
Jun. 30, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring Charges $ 28 $ 23 $ 72 $ 44
2020 Optimization [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring Charges     $ 47  
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee     2,400  
Restructuring and Related Cost, Expected Cost Remaining 20   $ 20  
Brazil Restructuring [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring Charges     $ 1  
Restructuring and Related Cost, Number of Positions Eliminated | Employee     20  
Restructuring and Related Cost, Expected Cost Remaining $ 7   $ 7