INVESTMENTS (DERIVATIVES GROSS COLLATERAL AMOUNTS LIABILITES) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	$ 2,145	$ 1,890
Investment Management
Offsetting Liabilities [Line Items]
Repurchase agreements, collateral cash held		(12)
Securities Sold under Agreements to Repurchase [Member]
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	2,142	1,890
Repurchase agreements, collateral securities held	(2,066)	(1,861)
Repurchase agreements, collateral cash held	(47)	(29)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	29	0
Securities Sold under Agreements to Repurchase [Member] | Counterparty D
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	834	234
Repurchase agreements, collateral securities held	(802)	(234)
Repurchase agreements, collateral cash held	(20)	0
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	12	0
Securities Sold under Agreements to Repurchase [Member] | Counterparty C
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet		1,033
Repurchase agreements, collateral securities held		(1,016)
Repurchase agreements, collateral cash held		(17)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral		0
Securities Sold under Agreements to Repurchase [Member] | Counterparty M
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	518	623
Repurchase agreements, collateral securities held	(508)	(611)
Repurchase agreements, collateral cash held	(5)	(12)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	5	0
Securities Sold under Agreements to Repurchase [Member] | Counterparty H
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	236
Repurchase agreements, collateral securities held	(227)
Repurchase agreements, collateral cash held	(6)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	3
Securities Sold under Agreements to Repurchase [Member] | Counterparty W
Offsetting Liabilities [Line Items]
Repurchase agreements, net amount presented on the balance sheet	554
Repurchase agreements, collateral securities held	(529)
Repurchase agreements, collateral cash held	(16)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	9
Securities Loaned
Offsetting Liabilities [Line Items]
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	5	$ 10
Variable Interest Entity, Primary Beneficiary | Investment Management
Offsetting Liabilities [Line Items]
Repurchase agreements, collateral cash held	$ (8)