PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 11	$ 7	$ 33	$ 23
Interest cost	41	46	123	138
Expected return on plan assets	(57)	(58)	(171)	(174)
Amortization of prior service cost	0	1	0	3
Amortization of net (gain) loss	22	17	66	51
Net periodic benefit cost	17	13	51	41
Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Interest cost	3	3	9	9
Amortization of net (gain) loss	(3)	(2)	(9)	(6)
Net periodic benefit cost	$ 0	$ 1	$ 0	$ 3