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PENSION AND POSTRETIREMENT EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Pension Benefit Plans | U.S. Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0 $ 1
Interest cost 3 4
Expected return on plan assets (6) (6)
Amortization of prior service credit and other 0 0
Net periodic (benefit) cost (3) (1)
Pension Benefit Plans | Non-U.S. Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1 1
Interest cost 2 3
Expected return on plan assets (2) (3)
Amortization of prior service credit and other 0 0
Net periodic (benefit) cost 1 1
Postretirement Benefit Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 0 0
Expected return on plan assets 0 0
Amortization of prior service credit and other (1) (1)
Net periodic (benefit) cost $ (1) $ (1)