INVESTMENTS (TRADING SECURITIES) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 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	$ 64	$ 33
Net investment gains (losses) recognized on securities sold during the period	66	39
Net investment gains (losses) recognized on securities sold during the period	(6)	0
Unrealized and realized gains (losses) on trading securities arising during the period	58	33
Interest and dividend income from trading securities	19	2
Net investment income (loss) from trading securities	$ 77	$ 35