FAIR VALUE MEASUREMENTS (Details - Difference between fair values and the aggregate contractual principal amounts of mortgage and other loans receivable and long-term borrowings for which the fair value option was elected) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage and other loans receivable, Difference	$ 47,631	$ 47,422
Long-term debt, Fair Value	2,276	2,062
Long-term debt, Outstanding Principal Amount	25,268	25,479
Fair Value Option
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, Fair Value	2,276	2,062
Long-term debt, Outstanding Principal Amount	1,543	1,502
Long-term debt, Difference	$ 733	$ 560