PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Pension Contributions				$ 725	$ 621
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosures [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year				850
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 123	$ 103		248	206
Interest cost	242	275		486	551
Expected return on plan assets	(341)	(332)		(685)	(664)
Amortization of prior service cost (credit)	(7)	6		(14)	12
Amortization of net loss	182	126		366	252
Net settlements	0	(4)	[1]	0	(2)	[1]
Net periodic benefit cost	199	174		401	355
Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	4	4		8	8
Interest cost	15	18		30	36
Amortization of prior service cost (credit)	(1)	0		(2)	0
Amortization of net loss	(3)	(4)		(6)	(8)
Net periodic benefit cost	$ 15	$ 18		$ 30	$ 36

[1] The 2014 impact relates to settlements associated with the wind-up of a Canadian pension plan.