LENDING ACTIVITIES (Details - Credit quality indicators for commercial mortgage loans) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Commercial Mortgage Recorded Investment [Line Items]
Mortgage and other loans receivable, net	$ 39,978	$ 37,023
Allowance for credit losses	356	322	$ 307	$ 297
Total mortgage and other loans receivable	$ 40,334	$ 37,345
Debt Coverage Ratio	2	2.1
Average Loan to Value Ratio	58.00%	57.00%
Apartments
Commercial Mortgage Recorded Investment [Line Items]
In good standing	$ 9,449	$ 8,163
Restructured	0	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	90	72
Allowance for credit losses	90	72
Total mortgage and other loans receivable	9,449	8,163
Offices
Commercial Mortgage Recorded Investment [Line Items]
In good standing	9,276	8,585
Restructured	114	115
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	2	3
Allowance for credit losses, General	107	94
Allowance for credit losses	109	97
Total mortgage and other loans receivable	9,390	8,700
Retail
Commercial Mortgage Recorded Investment [Line Items]
In good standing	5,048	5,338
Restructured	4	23
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	1	1
Allowance for credit losses, General	36	37
Allowance for credit losses	37	38
Total mortgage and other loans receivable	5,052	5,361
Industrial
Commercial Mortgage Recorded Investment [Line Items]
In good standing	2,625	2,023
Restructured	0	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	10	6
Allowance for credit losses	10	6
Total mortgage and other loans receivable	2,625	2,023
Hotel
Commercial Mortgage Recorded Investment [Line Items]
In good standing	2,424	2,373
Restructured	16	16
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	1	1
Allowance for credit losses, General	16	15
Allowance for credit losses	17	16
Total mortgage and other loans receivable	2,440	2,389
Others
Commercial Mortgage Recorded Investment [Line Items]
In good standing	1,932	1,960
Restructured	0	0
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	0	0
Allowance for credit losses, General	19	18
Allowance for credit losses	19	18
Total mortgage and other loans receivable	$ 1,932	$ 1,960
Commercial mortgages
Commercial Mortgage Recorded Investment [Line Items]
Number of loans in good standing | loan	765	778
Number of loans restructured | loan	4	5
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	769	783
In good standing	$ 30,754	$ 28,442
Restructured	134	154
90 days or less delinquent	0	0
Greater than 90 days delinquent or in process of foreclosure	0	0
Allowance for credit losses, Specific	4	5
Allowance for credit losses, General	278	242
Allowance for credit losses	$ 282	$ 247
Percentage of loans that are current as to payments of principal and interest	100.00%	99.00%
Percentage restructured	0.00%	1.00%
Percentage 90 days or less delinquent	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 allowance for losses	1.00%	1.00%
Total mortgage and other loans receivable	$ 30,888	$ 28,596
Commercial mortgages | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	27,326	26,023
Commercial mortgages | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	2,982	1,964
Commercial mortgages | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	580	609
Commercial mortgages | Less than 65%
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	20,902	19,876
Commercial mortgages | Less than 65% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	18,043	18,000
Commercial mortgages | Less than 65% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	2,554	1,525
Commercial mortgages | Less than 65% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	305	351
Commercial mortgages | 65% to 75%
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	7,937	6,415
Commercial mortgages | 65% to 75% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	7,515	6,038
Commercial mortgages | 65% to 75% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	202	193
Commercial mortgages | 65% to 75% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	220	184
Commercial mortgages | 76% to 80%
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	1,177	609
Commercial mortgages | 76% to 80% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	1,154	569
Commercial mortgages | 76% to 80% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	23	40
Commercial mortgages | 76% to 80% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	0	0
Commercial mortgages | Greater than 80%
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	872	1,696
Commercial mortgages | Greater than 80% | Greater than 1.2x
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	614	1,416
Commercial mortgages | Greater than 80% | 1.00X - 1.20X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	203	206
Commercial mortgages | Greater than 80% | Less than 1.00X
Commercial Mortgage Recorded Investment [Line Items]
Total mortgage and other loans receivable	$ 55	$ 74