OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Defined Contribution Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Contribution Plan Disclosure [Line Items]
Liabilities	$ 23,361	$ 24,324
Other liabilities	2,491	2,230
Costs charged to operations for employee savings plans and defined contribution plans	85	75	$ 65
401K Plan
Defined Contribution Plan Disclosure [Line Items]
Liabilities	$ 46	$ 45