INVESTMENTS (DERIVATIVES OFFSETING FINANCIAL ASSETS) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Net amounts presented in the balance sheets		$ (35)
Fair Value Assets Derivatives	$ 14,080
Equity Contract
Offsetting Assets [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
Reverse Repurchase agreements [Abstract]
Gross amount recognized	1,406	1,220
Gross amounts offset in the balance sheets	1,406	1,220
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Interest Rate Contract
Offsetting Assets [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)
Reverse Repurchase agreements [Abstract]
Gross amount recognized	243	1,163
Gross amounts offset in the balance sheets	243	1,163
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Credit Risk Contract
Reverse Repurchase agreements [Abstract]
Gross amount recognized		15
Gross amounts offset in the balance sheets		15
Net Amounts Of Liabilities Presented In Statement Of Financial Position		0
Credit Default Swaps
Offsetting Assets [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
Fair Value Assets Derivatives	35	20
Reverse Repurchase agreements [Abstract]
Gross amount recognized	5
Gross amounts offset in the balance sheets	5
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0
Currency Swap
Offsetting Assets [Line Items]
Gross amounts recognized	17
Gross amounts offset in the balance sheets	9
Net amounts presented in the balance sheets	8
Fair Value Assets Derivatives	17
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	3,147	3,280
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	42	122
Reverse Repurchase agreements [Abstract]
Gross amount recognized	3,105	3,158
Gross amounts offset in the balance sheets	3,105	3,158
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	3,147	3,284
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	42	126
Reverse Repurchase agreements [Abstract]
Gross amount recognized	3,105	3,158
Gross amounts offset in the balance sheets	3,105	3,158
Net Amounts Of Liabilities Presented In Statement Of Financial Position	0	0
Other Financial Instruments
Offsetting Assets [Line Items]
Gross amounts recognized	2,473	2,100
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	2,473	2,100
Other Invested Assets
Offsetting Assets [Line Items]
Gross amounts recognized	5,620	5,384
Gross amounts offset in the balance sheets	3,105	3,158
Net amounts presented in the balance sheets	2,515	2,226
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	2,869	2,108
Gross amounts offset in the balance sheets	0	0
Net Amounts Of Liabilities Presented In Statement Of Financial Position	2,869	2,108
Initial Margin
Offsetting Assets [Line Items]
Fair Value Assets Derivatives		4
Margin
Offsetting Assets [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
Fair Value Assets Derivatives	46	113
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		713
Gross amounts offset in the balance sheets		748
Reverse Repurchase agreements [Abstract]
Gross amount recognized		748
Gross amounts offset in the balance sheets		748
Net Amounts Of Liabilities Presented In Statement Of Financial Position		$ 0