INVESTMENTS INVESTMENTS (DERIVATIVES OFFSETING FINANCIAL ASSETS) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Offsetting Assets [Line Items]
Securities purchased under agreements to resell, net amount presented in the Balance Sheet,	$ 205	$ 79
Reverse Repurchase agreements [Abstract]
Securities sold under agreements to repurchase	2,038	1,890
Fair Value Assets Derivatives	13,988	12,055
Accrued interest derivatives	101	141
Investment Management
Reverse Repurchase agreements [Abstract]
Fair Value Assets Derivatives	76	13
Equity Contract
Offsetting Assets [Line Items]
Gross amounts recognized	1,103	1,049
Gross amounts offset in the balance sheets	764	673
Net amounts presented in the balance sheets	339	376
Interest Rate Contract
Offsetting Assets [Line Items]
Gross amounts recognized	639	389
Gross amounts offset in the balance sheets	54	104
Net amounts presented in the balance sheets	585	285
Credit Default Swaps
Offsetting Assets [Line Items]
Gross amounts recognized	13	14
Gross amounts offset in the balance sheets	26	37
Net amounts presented in the balance sheets	(13)	(23)
Reverse Repurchase agreements [Abstract]
Fair Value Assets Derivatives	15	16
Derivatives Subject to an ISDA Master Agreements
Offsetting Assets [Line Items]
Gross amounts recognized	1,755	1,452
Gross amounts offset in the balance sheets	844	814
Net amounts presented in the balance sheets	911	638
Derivatives not subject to an ISDA Master Agreements
Offsetting Assets [Line Items]
Gross amounts recognized	16	20
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	16	20
Total Derivatives
Offsetting Assets [Line Items]
Gross amounts recognized	1,771	1,472
Gross amounts offset in the balance sheets	844	814
Net amounts presented in the balance sheets	927	658
Other Financial Instruments
Offsetting Assets [Line Items]
Gross amounts recognized	1,317	1,271
Gross amounts offset in the balance sheets	0	0
Net amounts presented in the balance sheets	1,317	1,271
Other Invested Assets
Offsetting Assets [Line Items]
Gross amounts recognized	3,088	2,743
Gross amounts offset in the balance sheets	844	814
Net amounts presented in the balance sheets	2,244	1,929
Securities purchased under agreement to resell
Offsetting Assets [Line Items]
Securities purchased under agreement to resell, gross amount recognized	205	79
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,	205	79
Securities sold under agreement to repurchase
Reverse Repurchase agreements [Abstract]
Securities sold under agreements to repurchase, gross amount recognized	2,038	1,890
Securities sold under agreement to repurchase, gross amount offset in the Balance Sheets	0	0
Securities sold under agreements to repurchase	2,038	1,890
Exchange Traded Options | Investment Management | Long
Reverse Repurchase agreements [Abstract]
Fair Value Assets Derivatives	5	6
Securities Borrowed | Investment Management
Offsetting Assets [Line Items]
Net amounts presented in the balance sheets	26	75
Initial Margin
Reverse Repurchase agreements [Abstract]
Fair Value Assets Derivatives	$ (5)	$ (2)