CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 167,454		$ 122,009		$ 304,063		$ 293,777
Change in derivatives:
Reclassification to earnings	(32,756)	[1]	(38,241)	[1]	(64,414)	[1]	(67,542)	[1]
Ineffectiveness	(1,209)	[2]	3,162	[2]	(1,267)	[2]	3,105	[2]
Change in fair value of derivative instruments	82,584	[3]	21,616	[3]	89,308	[3]	86,285	[3]
Total change in derivatives	48,619		(13,463)		23,627		21,848
Change in pension and other postretirement liabilities	196	[4]	191	[4]	393	[4]	382	[4]
Change in currency translation adjustment	126		0		388		0
Comprehensive income	216,395		108,737		328,471		316,007
Less: comprehensive loss attributable to the noncontrolling interest	0		(60)		0		(89)
Comprehensive income attributable to Southwestern Energy	$ 216,395		$ 108,797		$ 328,471		$ 316,096

[1] (1) Net of ($20.9), ($24.5), ($41.2) and ($45.3) million in taxes for the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, respectively.

[2] (2) Net of ($0.8), $2.0, ($0.8) and $2.0 million in taxes for the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, respectively.

[3] (3) Net of $52.8, $13.8, $57.1 and $59.8 million in taxes for the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, respectively.

[4] (4) Net of $0.1, $0.1, $0.2 and $0.2 million in taxes for the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, respectively.