PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in Projected Benefit Obligations of Our Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gains) losses	$ (115)
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation beginning of year	6,211	$ 6,698
Service cost	48	57	$ 53
Interest cost	277	265	271
Plan participants’ contributions	0	0
Actuarial (gains) losses	120	(309)
Foreign currency translation	27	(159)
Benefits paid (includes lump sum settlements)	(419)	(342)
Plan amendments and other	0	(1)
Special/contractual termination benefits	0	0
Plan transfers	1	2
Plan acquisitions	199	0
Change in control enhanced benefits	5	0
Projected benefit obligation, ending	6,469	6,211	6,698
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation beginning of year	240	303
Service cost	0	0	1
Interest cost	8	9	10
Plan participants’ contributions	7	9
Actuarial (gains) losses	(5)	(34)
Foreign currency translation	3	(15)
Benefits paid (includes lump sum settlements)	(28)	(32)
Plan amendments and other	0	0
Special/contractual termination benefits	0	0
Plan transfers	0	0
Plan acquisitions	0	0
Change in control enhanced benefits	0	0
Projected benefit obligation, ending	$ 225	$ 240	$ 303