PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
	Oct. 06, 2017	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Plan Assets, Contributions by Employer					$ 520
Decrease to pension and other postretirement - noncurrent			$ 10,398		10,398		$ 11,375
Increase to accrued and other current liabilities			5,373		5,373		$ 4,481
Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost			127	$ 122	378	$ 337
Interest cost			221	222	660	626
Expected return on plan assets			(388)	(376)	(1,156)	(1,074)
Amortization of prior service credit			(6)	(6)	(18)	(18)
Amortization of net (gain) loss			161	147	476	441
Curtailment/settlement 1			0	0	(6)	0
Net periodic benefit cost			115	109	334	312
Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost			3	3	9	9
Interest cost			14	14	41	38
Amortization of prior service credit			0	(1)	0	(2)
Amortization of net (gain) loss			(2)	(1)	(5)	(5)
Net periodic benefit cost			15	$ 15	45	$ 40
Subsequent Event [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Initial payment to fund Annuity	$ 410
UNITED STATES | Nonqualified Plan [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Decrease to pension and other postretirement - noncurrent			793		793
Increase to accrued and other current liabilities			$ 793		$ 793
Scenario, Forecast [Member] | UNITED STATES | Nonqualified Plan [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Payment of plan obligations upon change in control		$ 900
Settlement charge upon change in control		$ 450