LENDING ACTIVITIES (Details - Credit quality performance indicators for commercial mortgages) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Mortgage and other loans receivable, net	$ 46,844	$ 46,984
Allowance for credit losses	$ 787	$ 438	$ 422	$ 397
Debt Coverage Ratio	2.0	2
Average Loan to Value Ratio	56.00%	56.00%
Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	$ 14,153	$ 13,698
Restructured	0	0
90 days or less delinquent	1	1
Greater than 90 days delinquent or in process of foreclosure	0	0
Mortgage and other loans receivable, net	14,154	13,699
Allowance for credit losses, Specific		0
Allowance for credit losses, General		81
Allowance for credit losses	161	81
Offices
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	10,478	10,553
Restructured	87	89
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	57	0
Mortgage and other loans receivable, net	10,622	10,642
Allowance for credit losses, Specific		2
Allowance for credit losses, General		153
Allowance for credit losses	315	155
Retail
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	5,221	5,332
Restructured	25	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Mortgage and other loans receivable, net	5,246	5,332
Allowance for credit losses, Specific		1
Allowance for credit losses, General		44
Allowance for credit losses	115	45
Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	3,574	3,663
Restructured	0	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Mortgage and other loans receivable, net	3,574	3,663
Allowance for credit losses, Specific		0
Allowance for credit losses, General		30
Allowance for credit losses	66	30
Hotel
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	2,156	2,211
Restructured	101	101
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Mortgage and other loans receivable, net	2,257	2,312
Allowance for credit losses, Specific		6
Allowance for credit losses, General		14
Allowance for credit losses	24	20
Others
Financing Receivable, Credit Quality Indicator [Line Items]
In good standing	438	522
Restructured	0	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Mortgage and other loans receivable, net	438	522
Allowance for credit losses, Specific		0
Allowance for credit losses, General		5
Allowance for credit losses	$ 8	$ 5
Commercial mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Number of loans in good standing | loan	718	736
Number of loans restructured | loan	5	3
Number of loans 90 days or less delinquent | loan	1	1
Number of loans greater than 90 days delinquent or in process of foreclosure | loan	2	0
Number of Loans | loan	726	740
In good standing	$ 36,020	$ 35,979
Restructured	213	190
90 days or less delinquent	1	1
Greater than 90 days delinquent or in process of foreclosure	57	0
Mortgage and other loans receivable, net	36,291	36,170
Allowance for credit losses, Specific		9
Allowance for credit losses, General		327
Allowance for credit losses	$ 689	$ 336
Percentage of loans that are current as to payments of principal and interest	99.00%	99.00%
Percentage restructured	1.00%	1.00%
Percentage 90 days or less delinquent	0.00%	0.00%
Percentage greater than 90 days delinquent or in foreclosure	0.00%	0.00%
Percentage Total	100.00%	100.00%
Percentage of loans with valuation allowance, Specific		0.00%
Percentage of loans with valuation allowance, Genaral		1.00%
Percentage of loans with allowance for losses	2.00%	1.00%