INVESTMENTS (DERIVATIVES OFFSETING FINANCIAL LIABILITES ) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets		$ (35)
Fair Value Liabilities Derivatives	$ 8,917
Expense accrual	7
Repurchase agreements [Abstract]
Repurchase agreements, net amount presented on the Balance Sheet	1,837	1,996
Equity Contract
Offsetting Liabilities [Line Items]
Gross amounts recognized	2,761	2,129
Gross amounts offset in the balance sheets	1,406	1,220
Net amounts presented in the balance sheets	1,355	909
Gross amount recognized	1,406	1,220
Gross amounts offset in the balance sheets	1,406	1,220
Net amounts presented in the balance sheets	0	0
Interest Rate Contract
Offsetting Liabilities [Line Items]
Gross amounts recognized	272	253
Gross amounts offset in the balance sheets	243	1,163
Net amounts presented in the balance sheets	29	(910)
Gross amount recognized	243	1,163
Gross amounts offset in the balance sheets	243	1,163
Net amounts presented in the balance sheets	0	0
Credit Risk Contract
Offsetting Liabilities [Line Items]
Gross amount recognized		15
Gross amounts offset in the balance sheets		15
Net amounts presented in the balance sheets		0
Credit Default Swaps
Offsetting Liabilities [Line Items]
Gross amounts recognized	35	20
Gross amounts offset in the balance sheets	5	15
Net amounts presented in the balance sheets	30	5
Gross amount recognized	5
Gross amounts offset in the balance sheets	5
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	5	15
Currency Contracts
Offsetting Liabilities [Line Items]
Gross amounts recognized		52
Gross amounts offset in the balance sheets		6
Net amounts presented in the balance sheets		46
Gross amount recognized		6
Gross amounts offset in the balance sheets		6
Net amounts presented in the balance sheets		0
Fair Value Liabilities Derivatives		6
Margin
Offsetting Liabilities [Line Items]
Gross amounts recognized	46	113
Gross amounts offset in the balance sheets	0	6
Net amounts presented in the balance sheets	46	107
Gross amount recognized	0	6
Gross amounts offset in the balance sheets	0	6
Net amounts presented in the balance sheets	0	0
Fair Value Liabilities Derivatives	0	6
Collateral Contracts
Offsetting Liabilities [Line Items]
Gross amounts recognized		713
Gross amounts offset in the balance sheets		748
Gross amount recognized		748
Gross amounts offset in the balance sheets		748
Net amounts presented in the balance sheets		0
Currency Swap
Offsetting Liabilities [Line Items]
Gross amounts recognized	17
Gross amounts offset in the balance sheets	9
Net amounts presented in the balance sheets	8
Gross amount recognized	9
Gross amounts offset in the balance sheets	9
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	9
Collateralized Securities
Offsetting Liabilities [Line Items]
Gross amounts recognized	16
Gross amounts offset in the balance sheets	1,442
Net amounts presented in the balance sheets	(1,426)
Gross amount recognized	1,442
Gross amounts offset in the balance sheets	1,442
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	1,442	748
Derivatives Subject to an ISDA Master Agreements
Offsetting Liabilities [Line Items]
Gross amounts recognized	3,147	3,280
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	42	122
Gross amount recognized	3,105	3,158
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	0	0
Derivatives not subject to an ISDA Master Agreements
Offsetting Liabilities [Line Items]
Gross amounts recognized	0	4
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	0	4
Gross amount recognized	0	0
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	0	0
Total Derivatives
Offsetting Liabilities [Line Items]
Gross amounts recognized	3,147	3,284
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	42	126
Gross amount recognized	3,105	3,158
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	0	0
Other Financial Liabilities
Offsetting Liabilities [Line Items]
Gross amount recognized	2,869	2,108
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	2,869	2,108
Other Liabilities
Offsetting Liabilities [Line Items]
Gross amount recognized	5,974	5,266
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	2,869	2,108
Securities sold under agreement to repurchase
Repurchase agreements [Abstract]
Securities sold under agreements to repurchase, gross amount recognized	1,830	1,992
Securities sold under agreement to repurchase, gross amount offset in the Balance Sheets	0	0
Repurchase agreements, net amount presented on the Balance Sheet	1,830	1,992
Securities sold under agreement to repurchase
Repurchase agreements [Abstract]
Repurchase agreements, net amount presented on the Balance Sheet		1,992
Other Financial Instruments
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	2,473	2,067
Derivative, Collateral, Obligation to Return Cash	0	0
Other
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	3,896	2,121
Derivative, Collateral, Obligation to Return Cash	$ (1,381)	$ 71