SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Lease Expense) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating lease fixed cost	$ 679	$ 686
Operating lease variable cost	1,852	1,778
Total operating lease cost	$ 2,531	$ 2,464