INVESTMENTS (TRADING SECURITIES) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Realized and Unrealized Gain (Loss) on Trading Securities [Abstract]
Net investment gains (losses) recognized during the period on securities held at the end of the period	$ 7	$ (56)	$ 126	$ (49)
Net investment gains (losses) recognized on securities sold during the period	1	2	(9)	9
Unrealized and realized gains (losses) on trading securities arising during the period	8	(54)	117	(40)
Interest and dividend income from trading securities	34	25	82	53
Net investment income (loss) from trading securities	$ 42	$ (29)	$ 199	$ 13