RETIREMENT PLANS Net Periodic Pension Expense for Qualified and Nonqualified U.S. Defined Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax		$ 3	$ 439		$ (439)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 39	41		$ 118	114
Interest cost	138	135		415	449
Expected return on plan assets	(192)	(199)		(577)	(611)
Actuarial loss	87	103		260	293
Amortization of prior service cost	7	11		21	31
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax	0	3		0	442
Net periodic pension expense	$ 79	$ 94		$ 237	$ 718