LENDING ACTIVITIES (Details - Credit quality indicators for commercial mortgage loans) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Commercial Mortgage Recorded Investment [Line Items]
Mortgage and other loans receivable, net	$ 43,834	$ 43,135
Allowance for credit losses	422	397	$ 347	$ 322
Total mortgage and other loans receivable	$ 44,256	$ 43,532
Debt Coverage Ratio	1.9	1.9
Average Loan to Value Ratio	58.00%	58.00%
Apartments
Commercial Mortgage Recorded Investment [Line Items]
In good standing	$ 12,061	$ 11,190
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	12,061	11,190
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	126	122
Allowance for credit losses	126	122
Offices
Commercial Mortgage Recorded Investment [Line Items]
In good standing	9,797	9,774
Restructured	94	96
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	9,891	9,870
Allowance for credit losses, Specific	2	2
Allowance for credit losses, General	104	104
Allowance for credit losses	106	106
Retail
Commercial Mortgage Recorded Investment [Line Items]
In good standing	5,613	5,645
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	5,613	5,645
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	51	51
Allowance for credit losses	51	51
Industrial
Commercial Mortgage Recorded Investment [Line Items]
In good standing	2,989	3,074
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	2,989	3,074
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	12	13
Allowance for credit losses	12	13
Hotel
Commercial Mortgage Recorded Investment [Line Items]
In good standing	2,511	2,507
Restructured	16	16
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	2,527	2,523
Allowance for credit losses, Specific	1	1
Allowance for credit losses, General	20	19
Allowance for credit losses	21	20
Others
Commercial Mortgage Recorded Investment [Line Items]
In good standing	584	580
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	584	580
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	7	6
Allowance for credit losses	$ 7	$ 6
Commercial mortgages
Commercial Mortgage Recorded Investment [Line Items]
Number of loans in good standing | loan	762	762
Number of loans restructured | loan	2	2
Number of loans 90 days or less delinquent | loan	0	0
Number of loans greater than 90 days delinquent or in process of foreclosure | loan	0	0
Number of Loans | loan	764	764
In good standing	$ 33,555	$ 32,770
Restructured	110	112
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	33,665	32,882
Allowance for credit losses, Specific	3	3
Allowance for credit losses, General	320	315
Allowance for credit losses	$ 323	$ 318
Percentage of loans that are current as to payments of principal and interest	100.00%	100.00%
Percentage restructured	0.00%	0.00%
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, Genaral	1.00%	1.00%
Percentage of loans with valuation allowance, Specific	0.00%	0.00%
Percentage of loans with allowance for losses	1.00%	1.00%
Commercial mortgages | Less than 65% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	$ 20,054	$ 19,204
Commercial mortgages | Less than 65% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	2,274	2,543
Commercial mortgages | Less than 65% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	247	250
Commercial mortgages | Less than 65% | Total
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	22,575	21,997
Commercial mortgages | 65% to 75% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	9,266	9,060
Commercial mortgages | 65% to 75% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	297	300
Commercial mortgages | 65% to 75% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	203	203
Commercial mortgages | 65% to 75% | Total
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	9,766	9,563
Commercial mortgages | 76% to 80% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	838	476
Commercial mortgages | 76% to 80% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	20	20
Commercial mortgages | 76% to 80% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	20	15
Commercial mortgages | 76% to 80% | Total
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	878	511
Commercial mortgages | Greater than 80% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	244	596
Commercial mortgages | Greater than 80% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	96	103
Commercial mortgages | Greater than 80% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	106	112
Commercial mortgages | Greater than 80% | Total
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	446	811
Commercial mortgages | Total | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	30,402	29,336
Commercial mortgages | Total | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	2,687	2,966
Commercial mortgages | Total | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	576	580
Commercial mortgages | Total | Total
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	$ 33,665	$ 32,882