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BENEFIT PLANS - COMPONENETS OF NET PERIODIC BENEFIT COST (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 16 $ 14  
Interest cost 5 8  
Net periodic benefit cost 25 28 $ 23
Cost of products sold      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 6 6 6
Selling, general and administrative expenses      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 10 8 10
Other expense (income), net      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 5 8 7
Expected return on plan assets (4) (5) (5)
Amortization of prior service credit (1) (1) 0
Amortization of net actuarial loss 9 6 6
Curtailment and settlement (gains) loss $ 0 $ 6 $ (1)