INVESTMENTS (DERIVATIVES OFFSETING FINANCIAL LIABILITES ) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets		$ (35)
Fair Value Liabilities Derivatives	$ 4,310	4,211
Expense accrual	6
Repurchase agreements [Abstract]
Repurchase agreements, net amount presented on the Balance Sheet	1,797	1,996
Investment Management
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	22	13
Derivative, Collateral, Obligation to Return Cash		(1)
Fair Value Liabilities Derivatives	11	11
Equity Contract
Offsetting Liabilities [Line Items]
Gross amounts recognized	2,453	2,128
Gross amounts offset in the balance sheets	1,325	1,219
Net amounts presented in the balance sheets	1,128	909
Gross amount recognized	1,325	1,219
Gross amounts offset in the balance sheets	1,325	1,219
Net amounts presented in the balance sheets	0	0
Interest Rate Contract
Offsetting Liabilities [Line Items]
Gross amounts recognized	404	253
Gross amounts offset in the balance sheets	194	1,162
Net amounts presented in the balance sheets	210	(909)
Gross amount recognized	194	1,162
Gross amounts offset in the balance sheets	194	1,162
Net amounts presented in the balance sheets	0	0
Credit Risk Contract
Offsetting Liabilities [Line Items]
Gross amount recognized		14
Gross amounts offset in the balance sheets		14
Net amounts presented in the balance sheets		0
Credit Default Swaps
Offsetting Liabilities [Line Items]
Gross amounts recognized	32	20
Gross amounts offset in the balance sheets	13	14
Net amounts presented in the balance sheets	19	6
Gross amount recognized	13
Gross amounts offset in the balance sheets	13
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	13	15
Currency Contracts
Offsetting Liabilities [Line Items]
Gross amounts recognized		48
Gross amounts offset in the balance sheets		1
Net amounts presented in the balance sheets		47
Gross amount recognized		1
Gross amounts offset in the balance sheets		1
Net amounts presented in the balance sheets		0
Fair Value Liabilities Derivatives		6
Margin
Offsetting Liabilities [Line Items]
Gross amounts recognized	57	107
Gross amounts offset in the balance sheets	0	6
Net amounts presented in the balance sheets	57	101
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		712
Gross amounts offset in the balance sheets		747
Gross amount recognized		747
Gross amounts offset in the balance sheets		747
Net amounts presented in the balance sheets		0
Currency Swap
Offsetting Liabilities [Line Items]
Gross amounts recognized	27
Gross amounts offset in the balance sheets	6
Net amounts presented in the balance sheets	21
Gross amount recognized	6
Gross amounts offset in the balance sheets	6
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	11
Collateralized Securities
Offsetting Liabilities [Line Items]
Gross amounts recognized	2
Gross amounts offset in the balance sheets	1,475
Net amounts presented in the balance sheets	(1,473)
Gross amount recognized	1,475
Gross amounts offset in the balance sheets	1,475
Net amounts presented in the balance sheets	0
Fair Value Liabilities Derivatives	1,475	748
Derivatives Subject to an ISDA Master Agreements
Offsetting Liabilities [Line Items]
Gross amounts recognized	2,975	3,268
Gross amounts offset in the balance sheets	3,013	3,149
Net amounts presented in the balance sheets	(38)	119
Gross amount recognized	3,013	3,149
Gross amounts offset in the balance sheets	3,013	3,149
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	2,975	3,272
Gross amounts offset in the balance sheets	3,013	3,149
Net amounts presented in the balance sheets	(38)	123
Gross amount recognized	3,013	3,149
Gross amounts offset in the balance sheets	3,013	3,149
Net amounts presented in the balance sheets	0	0
Other Financial Liabilities
Offsetting Liabilities [Line Items]
Gross amount recognized	2,531	2,108
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	2,531	2,108
Other Liabilities
Offsetting Liabilities [Line Items]
Gross amount recognized	5,544	5,257
Gross amounts offset in the balance sheets	3,013	3,149
Net amounts presented in the balance sheets	2,531	2,108
Securities sold under agreement to repurchase
Repurchase agreements [Abstract]
Securities sold under agreements to repurchase, gross amount recognized	1,791	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	1,791	1,992
Exchange Traded Options | Investment Management | Short
Offsetting Liabilities [Line Items]
Fair Value Liabilities Derivatives	8	1
Securities Loaned | Investment Management
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	29	10
Securities sold under agreement to repurchase
Repurchase agreements [Abstract]
Repurchase agreements, net amount presented on the Balance Sheet	1,791	1,992
Other Financial Instruments
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	1,244	2,067
Derivative, Collateral, Obligation to Return Cash	0	0
Total Derivatives
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	1,378	53
Derivative, Collateral, Obligation to Return Cash	(1,416)	66
Other
Offsetting Liabilities [Line Items]
Net amounts presented in the balance sheets	2,622	2,120
Derivative, Collateral, Obligation to Return Cash	$ (1,416)	$ 66