INVESTMENTS (TRADING SECURITIES) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	$ 55	$ (31)	$ 119	$ 7
Net investment gains (losses) recognized on securities sold during the period	(4)	0	(10)	7
Unrealized and realized gains (losses) on trading securities arising during the period	51	(31)	109	14
Interest and dividend income from trading securities	29	25	48	28
Net investment income (loss) from trading securities	$ 80	$ (6)	$ 157	$ 42