PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 9	$ 11	$ 27	$ 33
Interest cost	33	41	99	123
Expected return on plan assets	(54)	(57)	(162)	(171)
Amortization of net (gain) loss	19	22	57	66
Net periodic benefit cost	7	17	21	51
Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Interest cost	2	3	6	9
Amortization of net (gain) loss	(2)	(3)	(5)	(9)
Net periodic benefit cost	$ 0	$ 0	$ 1	$ 0