RETIREMENT PLANS Net Periodic Pension Expense for Qualified and Nonqualified U.S. Defined Benefit Plans (Details) - U.S. plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 21	$ 17	$ 64	$ 51
Interest cost	98	110	294	330
Expected return on plan assets	(167)	(158)	(501)	(473)
Actuarial loss	51	50	152	150
Amortization of prior service cost	5	4	15	12
Net periodic pension expense	$ 8	$ 23	$ 24	$ 70