PENSION AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Non-current pension liabilities	$ 477		$ 477		$ 600
Defined contribution plan expense	46	$ 49	142	$ 141
Pension Benefits [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Service cost - benefits earned during the period	7	6	19	19
Interest cost on projected benefit obligation	48	45	142	145
Expected return on plan assets	(104)	(104)	(308)	(314)
Amortization of prior service credits	(1)	(1)	(3)	(3)
Amortization of net actuarial (gain)/loss	20	22	61	62
Curtailments and settlements	22	19	91	66
Special termination benefits				1
Net periodic benefit cost/(credit)	$ (8)	$ (13)	$ 2	$ (24)