RESTRUCTURING CHARGES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Liability recognized	$ 33	$ 35	$ 53	$ 98	$ 211
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Liability recognized			$ 25		$ 177
Scenario, Forecast [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Charges associated with restructuring activities						$ 100