RESTRUCTURING (Details) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($) employees	Jun. 30, 2016 USD ($) employees	Dec. 31, 2015 USD ($) employees	Jun. 30, 2015 USD ($) employees	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) employees	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges								$ 74	$ 4	$ 19
2017 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 2	$ 8
Payments for Restructuring								(2)
Restructuring Reserve	8							8
2017 Restructuring [Member] | Impairment of Long-Lived Assets and Other Assets [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	62
2Q16 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees				16	5
Severance Costs			$ 2	$ 2	$ 1
Restructuring Reserve	$ 0							0
2Q15 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges							$ 18
2Q15 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees						8	16
Severance Costs						$ 1	$ 2
Payments for Restructuring								$ (2)	(1)
Restructuring Reserve				$ 2					$ 2
Entity Number of Employees | employees				15					15
2Q15 Restructuring [Member] | Cost Associated with Exit and Disposal Activities [Member]
Restructuring Cost and Reserve [Line Items]
Business Exit Costs					$ 1		2
2Q15 Restructuring [Member] | Impairment of Long-Lived Assets and Other Assets [Member]
Restructuring Cost and Reserve [Line Items]
Other Asset Impairment Charges							$ 14