DERIVATIVES (Details)	Dec. 31, 2013 ft3	Dec. 31, 2012 ft3	Nov. 30, 2012 Natural Gas - Swaps through March 2014 (in cubic feet) ft3	Mar. 31, 2012 Natural Gas - Swaps through March 2012 (in cubic feet) ft3	Dec. 31, 2011 Crude Oil - Collars through December 2011 (in barrels) bbl
Cash-Flow Hedges
Daily volume			50,000,000	50,000,000	12,000
Weighted-average strike price (in dollars per cubic foot)			0.00430	0.00607
Average Floor (in dollars per barrel)					32.92
Average Cap (in dollars per barrel)					46.35
Natural gas held in storage (in cubic feet)	11,000,000,000	20,000,000,000
Forecast sale of natural gas from storage designated as cash-flow hedges (in cubic feet)	13,000,000,000	20,000,000,000