CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES
Natural gas sales	$ 266.7	$ 283.2	$ 795.8	$ 808.4
Oil sales	76.1	49.9	218.4	139.5
NGL sales	34.1	9.3	67.8	27.4
Gathering, processing and other	118.7	76.4	340.1	238.7
Purchased gas and oil sales	356.8	145.8	810.6	460.4
Total Revenues	852.4	564.6	2,232.7	1,674.4
OPERATING EXPENSES
Purchased gas and oil expense	352.7	143.6	803.3	455.4
Lease operating expense	37.0	32.8	104.1	89.7
Gathering, processing and other	27.0	19.5	79.4	62.6
General and administrative	28.7	24.7	89.1	75.6
Separation costs	0	0.2	0	14.2
Production and property taxes	27.7	19.7	78.5	61.6
Depreciation, depletion and amortization	189.0	170.5	566.4	469.5
Exploration expenses	2.4	2.9	7.5	9.2
Abandonment and impairment	5.7	12.2	16.4	29.1
Total Operating Expenses	670.2	426.1	1,744.7	1,266.9
Net gain from asset sales	1.2	10.8	1.4	12.3
OPERATING INCOME	183.4	149.3	489.4	419.8
Interest and other income (loss)	(0.7)	1.6	(0.5)	4.4
Income from unconsolidated affiliates	2.3	1.1	4.5	2.5
Loss from early extinguishment of debt	(0.7)	(13.3)	(0.7)	(13.3)
Interest expense	(22.8)	(22.6)	(67.0)	(62.8)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	161.5	116.1	425.7	350.6
Income taxes	(59.1)	(44.2)	(156.0)	(130.5)
INCOME FROM CONTINUING OPERATIONS	102.4	71.9	269.7	220.1
Discontinued operations, net of income tax	0	0	0	43.2
NET INCOME	102.4	71.9	269.7	263.3
Net income attributable to noncontrolling interest	(0.9)	(0.8)	(2.2)	(2.1)
NET INCOME ATTRIBUTABLE TO QEP	$ 101.5	$ 71.1	$ 267.5	$ 261.2
Earnings Per Common Share Attributable to QEP
Basic from continuing operations (in dollars per share)	$ 0.58	$ 0.40	$ 1.52	$ 1.24
Basic from discontinued operations (in dollars per share)	$ 0	$ 0	$ 0	$ 0.25
Basic total (in dollars per share)	$ 0.58	$ 0.40	$ 1.52	$ 1.49
Diluted from continuing operations (in dollars per share)	$ 0.57	$ 0.40	$ 1.50	$ 1.23
Diluted from discontinued operations (in dollars per share)	$ 0	$ 0	$ 0	$ 0.24
Diluted total (in dollars per share)	$ 0.57	$ 0.40	$ 1.50	$ 1.47
Weighted-average common shares outstanding
Used in basic calculation (in shares)	176.6	175.4	176.5	175.2
Used in diluted calculation (in shares)	178.5	177.9	178.5	177.6
Dividends per common share (in dollars per share)	$ 0.02	$ 0.02	$ 0.06	$ 0.02