INCOME TAXES (Uncertain Tax Position) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits, beginning balance	$ 68	$ 1	$ 4
Increases related to positions taken on items from prior years	139	67	0
Settlement of uncertain tax positions with tax authorities	(206)	0	0
Decreases due to expiration of statutes of limitations	0	0	(3)
Gross unrecognized tax benefits, ending balance	1	68	1
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1	1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	(36)	37	$ (6)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 38
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	$ 1
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
Other noncurrent obligations [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	$ 67