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Restructuring and Impairment Charges - Charges (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Restructuring and impairment charges        
Restructuring/impairment charges $ 4 $ 11 $ 374 $ 25
Asset impairment     360  
Restructuring charges 4   14  
Cost Smart Cost of Sales and SG&A Program        
Restructuring and impairment charges        
Restructuring charges $ 4   $ 14  
Cost Smart Cost of Sales Program        
Restructuring and impairment charges        
Restructuring/impairment charges   6   15
Restructuring charges   6   15
Cost Smart SG&A Program        
Restructuring and impairment charges        
Restructuring/impairment charges   5   10
Restructuring charges   $ 5   $ 10