PRICE RISK MANAGEMENT ASSETS AND LIABILITIES Derivative Instruments Narrative (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended
	Sep. 30, 2014 Rate	Sep. 30, 2014 Interest Rate Swap, Ten Year Period [Member] Rate	Dec. 31, 2013 Interest Rate Swap, Ten Year Period [Member]	Dec. 31, 2013 Interest Rate Swap, Five Year Period [Member]	Sep. 30, 2013 Interest Rate Swap, Five Year Period [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		$ 125
Settlement of Interest Rate Swaps		$ 150	$ 175	$ 25	$ 50
Derivative, Average Fixed Interest Rate		3.82%
Debt Instrument, Basis Spread on Variable Rate	3.0175%