CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Operating Revenues:
Gas sales	$ 645		$ 617		$ 2,155		$ 1,736
Gas marketing	227		201		765		582
Oil sales	6		4		13		12
Gas gathering	50		46		143		134
Total Operating Revenues	928		868		3,076		2,464
Operating Costs and Expenses:
Gas purchases - midstream services	220		195		752		575
Operating expenses	108		90		309		237
General and administrative expenses	54		51		162		136
Depreciation, depletion and amortization	238		205		693		571
Taxes, other than income taxes	22		18		72		59
Total Operating Costs and Expenses	642		559		1,988		1,578
Operating Income	286		309		1,088		886
Interest Expense:
Interest on debt	25		25		75		74
Other interest charges	2		1		4		3
Interest capitalized	(14)		(15)		(40)		(48)
Total Interest Expense	13	[1]	11	[1]	39	[1]	29	[1]
Other Gain, Net					1
Gain (Loss) on Derivatives	78		12		(29)		75
Income Before Income Taxes	351		310		1,021		932
Provision (Benefit) for Income Taxes:
Current	32		(16)		34
Deferred	108		140		375		373
Total Provision for Income Taxes	140	[1]	124	[1]	409	[1]	373	[1]
Net Income (Loss)	$ 211		$ 186		$ 612		$ 559
Earnings Per Share:
Basic	$ 0.60		$ 0.53		$ 1.74		$ 1.60
Diluted	$ 0.60		$ 0.53		$ 1.74		$ 1.59
Weighted Average Common Shares Outstanding:
Basic	351,457,043		350,517,337		351,357,913		350,334,634
Diluted	352,327,250	[2],[3]	351,222,830	[2],[3]	352,334,546	[2],[3]	351,014,974	[2],[3]

[1] Interest expense and the provision for income taxes by segment are allocated as they are incurred at the corporate level.

[2] Options for 1,254,842 shares and 27,916 shares of restricted stock were excluded from the calculation for the three months ended September 30, 2014 because they would have had an antidilutive effect. Options for 1,550,838 shares and 15,703 shares of restricted stock were excluded from the calculation for the three months ended September 30, 2013 because they would have had an antidilutive effect.

[3] Options for 1,111,128 shares and 24,215 shares of restricted stock were excluded from the calculation for the nine months ended September 30, 2014 because they would have had an antidilutive effect. Options for 1,848,566 shares and 169,261 shares of restricted stock were excluded from the calculation for the nine months ended September 30, 2013 because they would have had an antidilutive effect.