INCOME TAXES - Total Uncertain Tax Positions and Interest and Penalties (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES
Uncertain tax positions	$ 43	$ 39	$ 46
Interest and penalties	10	9	13
Uncertain tax positions and interest and penalties	$ 53	$ 48	$ 59