Derivatives And Risk Management (Tables)

12 Months Ended

Dec. 31, 2015

Derivatives And Risk Management [Abstract]

Balance Sheet Classification Of Derivative Financial Instruments

	Derivative Assets
	December 31, 2015			December 31, 2014
	Balance Sheet Classification	Fair Value		Balance Sheet Classification	Fair Value
	(in millions)
Derivatives designated as hedging instruments:
Fixed price swaps	Derivative assets	$	–	Derivative assets	$	165
Total derivatives designated as hedging instruments		$	–		$	165
Derivatives not designated as hedging instruments:
Basis swaps	Derivative assets	$	3	Derivative assets	$	9
Fixed price swaps	Derivative assets		–	Derivative assets		163
Basis swaps	Other long-term assets		–	Other long-term assets		1
Interest rate swaps	Other long-term assets		–	Other long-term assets		1
Total derivatives not designated as hedging instruments		$	3		$	174
Total derivative assets		$	3		$	339
	Derivative Liabilities
	December 31, 2015			December 31, 2014
	Balance Sheet Classification	Fair Value		Balance Sheet Classification	Fair Value
	(in millions)
Derivatives not designated as hedging instruments:
Basis swaps	Derivative liabilities	$	–	Derivative liabilities	$	4
Fixed price call options	Derivative liabilities		–	Derivative liabilities		2
Interest rate swaps	Derivative liabilities		3	Derivative liabilities		3
Fixed price call options	Other long-term liabilities		–	Other long-term liabilities		10
Basis swaps	Other long-term liabilities		–	Other long-term liabilities		2
Interest rate swaps	Other long-term liabilities		2	Other long-term liabilities		2
Total derivatives not designated as hedging instruments		$	5		$	23
Total derivative liabilities		$	5		$	23

Summary Of Before Tax Effect Of Cash Flow Hedges On Consolidated Financial Statements

		Gain Recognized in Other Comprehensive Income
		(Effective Portion)
		For the years ended
		December 31,
Derivative Instrument		2015		2014
		(in millions)
Fixed price swaps		$	45	$	122
	Classification of Gain (Loss)	Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings
	Reclassified from Accumulated	(Effective Portion)
	Other Comprehensive Income	For the years ended
	into Earnings	December 31,
Derivative Instrument	(Effective Portion)	2015		2014
		(in millions)
Fixed price swaps	Gas Sales	$	209	$	(26)

Summary Of Before Tax Effect Of Fair Value Hedges Not Designated For Hedge Accounting

		Gain (Loss) on Derivatives,
		Excluding Derivatives, Settled
		Recognized in Earnings
	Consolidated Statements of Operations	For the years ended
	Classification of Gain (Loss) on	December 31,
Derivative Instrument	Derivatives, Net of Settlement	2015		2014
		(in millions)
Basis swaps	Gain on Derivatives	$	(2)	$	(7)
Fixed price call options	Gain on Derivatives		13		18
Fixed price swaps	Gain on Derivatives		(164)		126
Interest rate swaps	Gain on Derivatives		(2)		(7)
		Gain (Loss)
		on Derivatives, Settled (1)
		Recognized in Earnings
	Consolidated Statements of Operations	For the years ended
	Classification of Gain (Loss)	December 31,
Derivative Instrument	on Derivatives, Settled (1)	2015		2014
		(in millions)
Basis swaps	Gain on Derivatives	$	(2)	$	12
Fixed price swaps	Gain on Derivatives		208		(2)
Interest rate swaps	Gain on Derivatives		(4)		(1)

(1) The Company calculates gain (loss) on derivatives, settled, as the summation of gains and losses on positions that have settled within the period.