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	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage and other loans receivable, Fair Value	$ 11	$ 11
Mortgage and other loans receivable, Outstanding Principal Amount	32,712	29,873
Mortgage and other loans receivable, Difference	32,712	29,873
Long-term debt, Fair Value	3,664	3,670
Long-term debt, Outstanding Principal Amount	32,277	29,249
Fair Value Option
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage and other loans receivable, Fair Value	11	11
Mortgage and other loans receivable, Outstanding Principal Amount	8	9
Mortgage and other loans receivable, Difference	3	2
Long-term debt, Fair Value	3,664	3,670
Long-term debt, Outstanding Principal Amount	2,595	2,675
Long-term debt, Difference	$ 1,069	$ 995