RETIREMENT PLANS Net Periodic Pension Expense for Qualified and Nonqualified U.S. Defined Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax		$ (439)		$ (439)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 39	36	$ 79	73
Interest cost	139	158	277	314
Expected return on plan assets	(193)	(206)	(385)	(412)
Actuarial loss	88	96	173	190
Amortization of prior service cost	7	10	14	20
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax	0	439	0	439
Net periodic pension expense	$ 80	$ 533	$ 158	$ 624