CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
REVENUES
Natural gas sales	$ 197.6	$ 161.2
Oil sales	194.2	110.8
NGL sales	68.4	97.4
Gathering, processing and other	45.6	49.8
Purchased gas, oil and NGL sales	190.7	184.0
Total Revenues	696.5	603.2
OPERATING EXPENSES
Purchased gas, oil and NGL expense	196.8	188.4
Lease operating expense	38.9	40.1
Natural gas, oil and NGL transportation and other handling costs	34.0	34.5
Gathering, processing and other	20.6	23.7
General and administrative	46.0	36.0
Production and property taxes	35.9	24.7
Depreciation, depletion and amortization	254.2	199.3
Exploration expenses	5.1	2.0
Impairment	0	6.5
Total Operating Expenses	631.5	555.2
Net (loss) gain from asset sales	(0.2)	1.5
OPERATING INCOME	64.8	49.5
Realized and unrealized (losses) gains on derivative contracts (See Note 7)	(34.6)	216.3
Interest and other income	2.0	1.7
Income from unconsolidated affiliates	1.3	1.9
Interest expense	(39.4)	(24.7)
(LOSS) INCOME BEFORE INCOME TAXES	(5.9)	244.7
Income tax benefit (provision)	2.2	(88.7)
NET (LOSS) INCOME	(3.7)	156.0
Net income attributable to noncontrolling interest	(0.6)	(0.8)
NET (LOSS) INCOME ATTRIBUTABLE TO QEP	$ (4.3)	$ 155.2
Earnings Per Common Share Attributable to QEP
Basic total (in dollars per share)	$ (0.02)	$ 0.87
Diluted total (in dollars per share)	$ (0.02)	$ 0.87
Weighted-average common shares outstanding
Used in basic calculation (in shares)	177.0	177.4
Used in diluted calculation (in shares)	177.0	178.5
Dividends per common share (in dollars per share)	$ 0.02	$ 0.02