INVESTMENTS (DERIVATIVES OFFSETING FINANCIAL ASSETS) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Net amounts presented in the balance sheets		$ (35)
Fair Value Assets Derivatives	$ 12,589	13,585
Investment Management
Offsetting Assets [Line Items]
Net amounts presented in the balance sheets	33	13
Equity Contract
Offsetting Assets [Line Items]
Gross amounts recognized	2,339	2,128
Gross amounts offset in the balance sheets	1,279	1,219
Net amounts presented in the balance sheets	1,060	909
Reverse Repurchase agreements [Abstract]
Gross amount recognized	1,279	1,219
Gross amounts offset in the balance sheets	1,279	1,219
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Interest Rate Contract
Offsetting Assets [Line Items]
Gross amounts recognized	242	253
Gross amounts offset in the balance sheets	384	1,162
Net amounts presented in the balance sheets	(142)	(909)
Reverse Repurchase agreements [Abstract]
Gross amount recognized	384	1,162
Gross amounts offset in the balance sheets	384	1,162
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Credit Risk Contract
Reverse Repurchase agreements [Abstract]
Gross amount recognized		14
Gross amounts offset in the balance sheets		14
Net Amounts Of Liabilities Presented In Statement Of Financial Position		0
Credit Default Swaps
Offsetting Assets [Line Items]
Gross amounts recognized	22	20
Gross amounts offset in the balance sheets	11	14
Net amounts presented in the balance sheets	11	6
Fair Value Assets Derivatives	23	20
Reverse Repurchase agreements [Abstract]
Gross amount recognized	11
Gross amounts offset in the balance sheets	11
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0
Currency Swap
Offsetting Assets [Line Items]
Gross amounts recognized	30
Gross amounts offset in the balance sheets	9
Net amounts presented in the balance sheets	21
Fair Value Assets Derivatives	36
Reverse Repurchase agreements [Abstract]
Gross amount recognized	9
Gross amounts offset in the balance sheets	9
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0
Derivatives Subject to an ISDA Master Agreements
Offsetting Assets [Line Items]
Gross amounts recognized	2,785	3,268
Gross amounts offset in the balance sheets	2,715	3,149
Net amounts presented in the balance sheets	70	119
Reverse Repurchase agreements [Abstract]
Gross amount recognized	2,707	3,149
Gross amounts offset in the balance sheets	2,707	3,149
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Derivatives not subject to an ISDA Master Agreements
Offsetting Assets [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
Reverse Repurchase agreements [Abstract]
Gross amount recognized	0	0
Gross amounts offset in the balance sheets	0	0
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Total Derivatives
Offsetting Assets [Line Items]
Gross amounts recognized	2,785	3,272
Gross amounts offset in the balance sheets	2,715	3,149
Net amounts presented in the balance sheets	70	123
Reverse Repurchase agreements [Abstract]
Gross amount recognized	2,707	3,149
Gross amounts offset in the balance sheets	2,707	3,149
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Other Financial Instruments
Offsetting Assets [Line Items]
Gross amounts recognized	1,976	2,063
Gross amounts offset in the balance sheets	(6)	0
Net amounts presented in the balance sheets	1,982	2,063
Other Invested Assets
Offsetting Assets [Line Items]
Gross amounts recognized	4,761	5,335
Gross amounts offset in the balance sheets	2,709	3,149
Net amounts presented in the balance sheets	2,052	2,186
Securities purchased under agreement to resell
Reverse Repurchase agreements [Abstract]
Securities purchased under agreement to resell, gross amount recognized	0	0
Securities purchased under agreement to resell, gross amount offset in the Balance Sheets	0	0
Securities purchased under agreements to resell, net amount presented in the Balance Sheet,	0	0
Other Financial Liabilities
Reverse Repurchase agreements [Abstract]
Gross amount recognized	2,271	2,108
Gross amounts offset in the balance sheets	0	0
Net Amounts Of Liabilities Presented In Statement Of Financial Position	2,271	2,108
Exchange Traded Options | Investment Management | Long
Offsetting Assets [Line Items]
Fair Value Assets Derivatives	2	3
Securities Borrowed | Investment Management
Offsetting Assets [Line Items]
Net amounts presented in the balance sheets	147	83
Initial Margin
Offsetting Assets [Line Items]
Fair Value Assets Derivatives		4
Margin
Offsetting Assets [Line Items]
Gross amounts recognized	84	107
Gross amounts offset in the balance sheets	8	6
Net amounts presented in the balance sheets	76	101
Fair Value Assets Derivatives	84	107
Reverse Repurchase agreements [Abstract]
Gross amount recognized	0	6
Gross amounts offset in the balance sheets	0	6
Net Amounts Of Liabilities Presented In Statement Of Financial Position	$ 0	0
Collateral Contracts
Offsetting Assets [Line Items]
Gross amounts recognized		712
Gross amounts offset in the balance sheets		747
Reverse Repurchase agreements [Abstract]
Gross amount recognized		747
Gross amounts offset in the balance sheets		747
Net Amounts Of Liabilities Presented In Statement Of Financial Position		$ 0