CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Operating Revenues:
Gas sales	$ 717		$ 614		$ 1,510		$ 1,119
Gas marketing	266		201		538		381
Oil sales	5		3		7		8
Gas gathering	47		44		93		87
Total Operating Revenues	1,035		862		2,148		1,595
Operating Costs and Expenses:
Gas purchases - midstream services	261		200		532		380
Operating expenses	101		82		201		146
General and administrative expenses	52		48		108		85
Depreciation, depletion and amortization	230		187		455		366
Taxes, other than income taxes	24		20		50		41
Total Operating Costs and Expenses	668		537		1,346		1,018
Operating Income	367		325		802		577
Interest Expense:
Interest on debt	25		25		50		49
Other interest charges			1		1		3
Interest capitalized	(13)		(17)		(26)		(33)
Total Interest Expense	12	[1]	9	[1]	25	[1]	19	[1]
Other Gain, Net			1		1
Gain (Loss) on Derivatives	(8)		93		(108)		64
Income Before Income Taxes	347		410		670		622
Provision for Income Taxes:
Current	3		16		2		16
Deferred	137		148		267		233
Total Provision for Income Taxes	140	[1]	164	[1]	269	[1]	249	[1]
Net Income	$ 207		$ 246		$ 401		$ 373
Earnings Per Share:
Basic	$ 0.59		$ 0.70		$ 1.14		$ 1.07
Diluted	$ 0.59		$ 0.70		$ 1.14		$ 1.06
Weighted Average Common Shares Outstanding:
Basic	351,391,582		350,448,806		351,307,527		350,241,768
Diluted	352,579,522	[2],[3]	351,082,807	[2],[3]	352,306,268	[2],[3]	350,911,892	[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 654,189 shares and 19,045 shares of restricted stock were excluded from the calculation for the three months ended June 30, 2014 because they would have had an antidilutive effect. Options for 1,599,246 shares and 29,251 shares of restricted stock were excluded from the calculation for the three months ended June 30, 2013 because they would have had an antidilutive effect.

[3] Options for 1,026,958 shares and 22,952 shares of restricted stock were excluded from the calculation for the six months ended June 30, 2014 because they would have had an antidilutive effect. Options for 2,079,849 shares and 246,347 shares of restricted stock were excluded from the calculation for the six months ended June 30, 2013 because they would have had an antidilutive effect.