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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Change in Plan Assets
Beginning fair value of plan assets	$ 294
Ending fair value of plan assets	202	$ 294
Change in Benefit Obligation
Overfunded (underfunded) status	(17)	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	1	1
Participant contributions	1	0
Plan settlement	0	0
Effect of foreign exchange rates	0	0
Benefits paid	(2)	(1)
Ending fair value of plan assets	0	0
Change in Benefit Obligation
Beginning benefit obligations	14	15
Interest cost	1	0
Actuarial gain	(2)	0
Participant contributions	1	0
Plan settlement	0	0
Effect of foreign exchange rates	0	0
Benefits paid	(2)	(1)
Ending accumulated benefit obligations	12	14
Overfunded (underfunded) status	(12)	(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	2	2
Participant contributions	0	0
Plan settlement	0	0
Effect of foreign exchange rates	0	0
Benefits paid	(2)	(2)
Ending fair value of plan assets	0	0
Change in Benefit Obligation
Beginning benefit obligations	21	21
Interest cost	1	1
Actuarial gain	(1)	1
Participant contributions	0	0
Plan settlement	0	0
Effect of foreign exchange rates	0	0
Benefits paid	(2)	(2)
Ending accumulated benefit obligations	19	21
Overfunded (underfunded) status	(19)	(21)
Foreign | Pension Benefits
Change in Plan Assets
Beginning fair value of plan assets	294	262
Actual return on plan assets, net of expenses	(16)	29
Employer contribution	0	2
Participant contributions	0	0
Plan settlement	(62)	0
Effect of foreign exchange rates	(6)	10
Benefits paid	(8)	(9)
Ending fair value of plan assets	202	294
Change in Benefit Obligation
Beginning benefit obligations	246	229
Interest cost	8	8
Actuarial gain	2	10
Participant contributions	0	0
Plan settlement	(55)	0
Effect of foreign exchange rates	(4)	8
Benefits paid	(9)	(9)
Ending accumulated benefit obligations	188	246
Overfunded (underfunded) status	14	$ 48
Loss from settlement	$ 20