INCOME TAXES (Uncertain Tax Position) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits, beginning balance	$ 1	$ 4	$ 166
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	67	0	1
Decreases related to positions taken on items from prior years	0	0	(7)
Settlement of uncertain tax positions with tax authorities	0	0	(154)
Decreases due to expiration of statutes of limitations	0	(3)	(2)
Gross unrecognized tax benefits, ending balance	68	1	4
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	37	$ (6)	$ (15)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	$ 68
Federal Income Tax [Member]
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Earliest open year	2004	2004
State and Local Income Tax [Member]
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Earliest open year	2004	2004