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		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 23	$ 16	$ 43	$ 34
Interest cost	98	110	196	220
Expected return on plan assets	(167)	(158)	(334)	(315)
Actuarial loss	46	49	101	100
Amortization of prior service cost	5	4	10	8
Net periodic pension expense	$ 5	$ 21	$ 16	$ 47