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PENSION AND OTHER POSTRETIREMENT BENEFITS - Benefit Obligation, Fair Value of Plan Assets, Funded Status of Plan Assets, Projected Benefit Obligations and Accumulated Benefit Obligation (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
Change in Plan Assets    
Beginning fair value of plan assets   $ 262
Ending fair value of plan assets $ 262 294
Change in Benefit Obligation    
Overfunded (underfunded) status (3) 13
Postretirement Benefits    
Change in Plan Assets    
Beginning fair value of plan assets 0 0
Actual return on plan assets, net of expenses 0 0
Employer contribution 0 1
Effect of foreign exchange rates 0 0
Benefits paid 0 (1)
Ending fair value of plan assets 0 0
Change in Benefit Obligation    
Beginning benefit obligations 16 15
Interest cost 0 0
Actuarial gain (1) 0
Effect of foreign exchange rates 0 0
Benefits paid 0 (1)
Ending accumulated benefit obligations 15 14
Overfunded (underfunded) status (15) (14)
Domestic | Pension Benefits    
Change in Plan Assets    
Beginning fair value of plan assets 0 0
Actual return on plan assets, net of expenses 0 0
Employer contribution 1 2
Effect of foreign exchange rates 0 0
Benefits paid (1) (2)
Ending fair value of plan assets 0 0
Change in Benefit Obligation    
Beginning benefit obligations 23 21
Interest cost 0 1
Actuarial gain (1) 1
Effect of foreign exchange rates 0 0
Benefits paid (1) (2)
Ending accumulated benefit obligations 21 21
Overfunded (underfunded) status (21) (21)
Foreign | Pension Benefits    
Change in Plan Assets    
Beginning fair value of plan assets 278 262
Actual return on plan assets, net of expenses (10) 29
Employer contribution 2 2
Effect of foreign exchange rates (6) 10
Benefits paid (2) (9)
Ending fair value of plan assets 262 294
Change in Benefit Obligation    
Beginning benefit obligations 251 229
Interest cost 2 8
Actuarial gain (17) 10
Effect of foreign exchange rates (5) 8
Benefits paid (2) (9)
Ending accumulated benefit obligations 229 246
Overfunded (underfunded) status $ 33 $ 48