SEGMENT INFORMATION (Details - Consolidated total revenues and real estate and other fixed assets by major geographic area) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	$ 12,560	$ 11,486	$ 11,631	$ 11,712	$ 12,635	$ 11,751	$ 12,502	$ 12,632	$ 47,389	$ 49,520	$ 52,367
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	2,172				2,522				2,172	2,522	2,660
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues									31,003	34,149	36,871
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	1,479				1,630				1,479	1,630	1,326
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues									16,386	15,371	15,496
Real Estate and Other Fixed Assets, Net of Accumulated Depreciation	$ 693				$ 892				$ 693	$ 892	$ 1,334