INVESTMENTS (REPURCHASE TO MATURITY TRANSACTIONS) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Securities sold under agreement to repurchase	$ 1,890
Securities purchased under agreement to resell	79
U.S. Treasury, government and agency
Derivative [Line Items]
Securities sold under agreement to repurchase	1,890
Corporate
Derivative [Line Items]
Securities purchased under agreement to resell	79
Maturity Less than 30 Days
Derivative [Line Items]
Securities sold under agreement to repurchase	1,865
Securities purchased under agreement to resell	79
Maturity Less than 30 Days \| U.S. Treasury, government and agency
Derivative [Line Items]
Securities sold under agreement to repurchase	1,865
Maturity Less than 30 Days \| Corporate
Derivative [Line Items]
Securities purchased under agreement to resell	79
Maturity 30 to 90 Days
Derivative [Line Items]
Securities sold under agreement to repurchase	25
Maturity 30 to 90 Days \| U.S. Treasury, government and agency
Derivative [Line Items]
Securities sold under agreement to repurchase	$ 25

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Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial asset at a date certain for a specified price. Includes repurchase-to-maturity transactions and liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 7
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=55761124&loc=SL34722452-111729

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- Definition

Amount, before effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes assets not subject to a master netting arrangement and elected not to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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