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RESTRUCTURING COSTS - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs $ 5 $ 33  
2020 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 2    
Restructuring reserve 2   $ 0
2019 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 3 25  
Restructuring reserve 32   $ 44
2018 and Prior Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 0 8  
Restructuring reserve 13 47  
Cost of sales      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 1 5  
Cost of sales | 2020 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 1    
Cost of sales | 2019 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 0 2  
Selling, general and administrative      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 4 28  
Selling, general and administrative | 2020 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs 1    
Selling, general and administrative | 2019 Actions      
Restructuring Cost and Reserve [Line Items]      
Net pre-tax restructuring costs $ 3 $ 23