FAIR VALUE DISCLOSURES (UNREALIZED GAINS (LOSSES) FOR LEVEL 3 STILL HELD) (Details) - Level 3 - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Corporate
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	$ 0	$ 1	$ 0	$ 1
Other comprehensive income (loss)	6	(2)	0	8
State and Political Sub- divisions
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	0	0	0	0
Commercial Mortgage- backed
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	(9)	(12)	(29)	(36)
Other comprehensive income (loss)	8	10	27	(1)
Asset-backed Securities
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	0		15
Other comprehensive income (loss)	(3)	(1)	(10)	1
GMIB Reinsurance
Change in Accounting Estimate [Line Items]
Increase (Decrease) in the Fair Value of the Reinsurance Contract Asset		(79)	537	2,576
Equity Method Investments
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	(4)	0	(4)	(1)
Other comprehensive income (loss)		0	0	0
Separate Accounts Assets
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	4	7	22	19
Other comprehensive income (loss)			0	0
Assets and Liabilities Still Held | Corporate
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	4			9
Assets and Liabilities Still Held | State and Political Sub- divisions
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)				1
Assets and Liabilities Still Held | Commercial Mortgage- backed
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	9	10	26	(6)
Assets and Liabilities Still Held | Asset-backed Securities
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	(2)	(1)	(9)	1
Assets and Liabilities Still Held | Fixed Maturities, Available-for-Sale [Member]
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	11	9	17	5
Assets and Liabilities Still Held | Total Debt Maturities Available For Sale
Change in Accounting Estimate [Line Items]
Other comprehensive income (loss)	11	9	17	5
Assets and Liabilities Still Held | GMIB Reinsurance
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	(368)
Assets and Liabilities Still Held | Separate Accounts Assets
Change in Accounting Estimate [Line Items]
Investment Gains (Losses), Net	$ 0	$ 0	$ 0	$ 0