INVESTMENTS - CREDIT LOSS IMPAIRMENTS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 3,428	$ 414
Gross gains on sales	127	19
Gross losses on sales	(41)	(20)
Total OTTI	0	0
Non-credit losses recognized in OCI	0	0
Credit losses recognized in net income (loss)	0	0
Fixed Maturities - Credit Loss Impairments
Balances, beginning of period	(10)	(190)
Previously recognized impairments on securities that matured, paid, prepaid or sold	0	43
Recognized impairments on securities impaired to fair value this period	0	0
Impairments recognized this period on securities not previously impaired	0	0
Additional impairments this period on securities previously impaired	0	0
Increases due to passage of time on previously recorded credit losses	0	0
Accretion of previously recognized impairments due to increases in expected cash flows	0	0
Balances, end of period	$ (10)	$ (147)