SEGMENT INFORMATION (Details - Consolidated total revenues and real estate and other fixed assets by major geographic area) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	$ 43,736	$ 49,746	$ 47,389
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	1,840	1,953	2,172
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	30,204	36,930	31,376
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	1,230	1,333	1,479
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	13,532	12,816	16,013
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	$ 610	$ 620	$ 693