CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES
Gas sales	$ 468.5	$ 776.4	$ 779.0
Oil sales	834.2	1,368.5	916.6
NGL sales	80.0	223.3	192.2
Other revenues	15.1	11.1	22.4
Purchased gas, oil and NGL sales	620.8	913.9	774.9
Total Revenues	2,018.6	3,293.2	2,685.1
OPERATING EXPENSES
Purchased gas, oil and NGL expense	626.8	910.1	783.5
Lease operating expense	238.8	240.1	181.3
Gas, oil and NGL transportation and other handling costs	291.3	277.6	222.0
Gathering and other expense	5.8	6.7	8.4
General and administrative	181.1	204.4	160.4
Production and property taxes	117.6	205.2	161.3
Depreciation, Depletion and Amortization	881.1	994.7	963.8
Depreciation, depletion and amortization	881.1	1,040.6	1,016.0
Exploration expenses	2.7	9.9	11.9
Impairment	55.6	1,143.2	93.0
Total Operating Expenses	2,400.8	3,991.9	2,585.6
Net gain (loss) from asset sales	4.6	(148.6)	103.5
OPERATING INCOME (LOSS)	(377.6)	(847.3)	203.0
Realized and unrealized gains (losses) on derivative contracts (Note 7)	277.2	363.3	58.9
Interest and other income	3.0	12.8	15.2
Income from unconsolidated affiliates	0.0	0.3	0.2
Loss from early extinguishment of debt	0.0	(2.0)	0.0
Interest expense	(145.6)	(169.1)	(165.1)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(243.0)	(642.0)	112.2
Income tax (provision) benefit	93.6	232.5	(60.1)
NET INCOME FROM CONTINUING OPERATIONS	(149.4)	(409.5)	52.1
Net income from discontinued operations, net of income tax	0.0	1,193.9	107.3
NET INCOME (LOSS)	$ (149.4)	$ 784.4	$ 159.4
Earnings (Loss) Per Common Share Attributable to QEP
Basic total	$ (0.85)	$ 4.36	$ 0.89
Diluted total	$ (0.85)	$ 4.36	$ 0.89
Weighted-average common shares outstanding
Used in basic calculation	176.6	179.8	179.2
Used in diluted calculation	176.6	179.8	179.5
Dividends per common share	$ 0.08	$ 0.08	$ 0.08
Continuing Operations [Member]
Earnings (Loss) Per Common Share Attributable to QEP
Basic total	(0.85)	(2.28)	0.29
Diluted total	(0.85)	(2.28)	0.29
Discontinued Operations [Member]
Earnings (Loss) Per Common Share Attributable to QEP
Basic total	0.00	6.64	0.60
Diluted total	$ 0.00	$ 6.64	$ 0.60