FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2013

FAIR VALUE MEASUREMENTS

Assets and liabilities measured at fair value on a recurring basis (in millions)

	Fair Value Measurements at December 31, 2013 Using
Description	Level 1		Level 2		Level 3		Netting and Collateral			Total Fair Value
Assets:
Commodity derivatives	$	185	$	195	$	—	$	(329	)	$	51
Liabilities:
Commodity derivatives	$	199	$	223	$	—	$	(364	)	$	58
	Fair Value Measurements at December 31, 2012 Using
Description	Level 1		Level 2		Level 3		Netting and Collateral			Total Fair Value
Assets:
Commodity derivatives	$	107	$	312	$	—	$	(301	)	$	118
Liabilities:
Commodity derivatives	$	99	$	398	$	—	$	(371	)	$	126