FAIR VALUE MEASUREMENTS (Reconciliation of Beginning and Ending Balances of Assets Unobservable Inputs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 4	$ 1
Purchases, additions and issuances		8
Included in earnings	(3)	(4)
Included in other comprehensive income (loss)		(1)
Ending Balance	1	4
Available-for-sale Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	0	1
Purchases, additions and issuances		0
Included in earnings	0	0
Included in other comprehensive income (loss)		(1)
Ending Balance	0	0
Put Option Derivative Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	4	0
Purchases, additions and issuances		8
Included in earnings	(3)	(4)
Included in other comprehensive income (loss)		0
Ending Balance	$ 1	$ 4