CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
OPERATING EXPENSES
Impairment				$ 20.5	$ 3.5
Income from unconsolidated affiliates				0.0	3.4
NET INCOME (LOSS)		$ (76.3)	$ (92.3)	$ (131.9)	$ (52.6)
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		$ (0.43)	$ (0.51)	$ (0.75)	$ (0.29)
Earnings Per Share, Diluted		$ (0.43)	$ (0.51)	$ (0.75)	$ (0.29)
Weighted-average common shares outstanding
Used in basic calculation (in shares)		176.7	180.1	176.4	179.9
Used in diluted calculation (in shares)		176.7	180.1	176.4	179.9
Dividends per common share (in dollars per share)		$ 0.02	$ 0.02	$ 0.04	$ 0.04
Continuing Operations [Member]
REVENUES
Gas sales		$ 111.9	$ 215.1	$ 233.9	$ 437.6
Oil sales		250.4	358.8	429.2	647.5
NGL sales		26.1	65.0	45.2	128.2
Other revenue		5.2	(0.8)	9.6	1.7
Purchased gas and oil sales		215.0	249.1	382.3	489.7
Total Revenues		608.6	887.2	1,100.2	1,704.7
OPERATING EXPENSES
Purchased gas and oil expense		217.2	249.2	386.6	487.1
Lease operating expense		57.1	59.5	118.9	115.9
Gas, oil and NGL transportation and other handling costs		73.0	67.5	138.1	127.4
Gathering and other expense		1.4	1.8	3.1	3.4
General and administrative		51.3	52.3	98.7	97.6
Production and property taxes		32.7	53.5	60.5	101.4
Depreciation, depletion and amortization		215.8	235.2	411.2	461.1
Exploration expenses		0.8	1.7	1.9	3.9
Impairment		0.5	1.5	20.5	3.5
Total operating expenses		649.8	722.2	1,239.5	1,401.3
Net gain (loss) from asset sales		24.5	(200.9)	(6.0)	(198.5)
OPERATING INCOME		(16.7)	(35.9)	(145.3)	104.9
Realized and unrealized gains (losses) on derivative contracts (Note 8)		(66.0)	(88.0)	14.9	(168.9)
Interest and other income (expense)		3.8	0.8	1.2	3.7
Income from unconsolidated affiliates		0.0	0.1	0.0	0.1
Interest expense		(36.2)	(45.0)	(73.0)	(86.9)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		(115.1)	(168.0)	(202.2)	(147.1)
Income tax (provision) benefit		38.8	61.9	70.3	53.7
NET INCOME (LOSS) FROM CONTINUING OPERATIONS		(76.3)	(106.1)	(131.9)	(93.4)
Net income from discontinued operations, net of income tax		0.0	13.8	0.0	40.8
NET INCOME (LOSS)		$ (76.3)	$ (92.3)	$ (131.9)	$ (52.6)
Continuing Operations [Member]
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		$ (0.43)	$ (0.59)	$ (0.75)	$ (0.52)
Earnings Per Share, Diluted		(0.43)	$ (0.59)	(0.75)	$ (0.52)
Discontinued Operations [Member]
REVENUES
NGL sales			$ 27.8		$ 65.8
Other revenue			34.9		76.8
Purchased gas and oil sales	[1]		(13.2)		(26.6)
Total Revenues			49.5		116.0
OPERATING EXPENSES
Purchased gas and oil expense	[1]		(13.3)		(27.1)
Lease operating expense	[1]		(2.0)		(3.1)
Gas, oil and NGL transportation and other handling costs	[1]		(13.1)		(29.5)
Gathering and other expense			22.8		47.1
General and administrative			11.9		23.2
Production and property taxes			2.5		4.0
Depreciation, depletion and amortization			14.5		28.8
Total operating expenses			23.3		43.4
Net gain (loss) from asset sales			(0.1)		(0.1)
OPERATING INCOME			26.1		72.5
Income from unconsolidated affiliates			1.1		3.3
Interest expense			(0.7)		(1.3)
Net income from discontinued operations, net of income tax			$ 13.8		$ 40.8
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		0.00	$ 0.08	0.00	$ 0.23
Earnings Per Share, Diluted		$ 0.00	$ 0.08	$ 0.00	$ 0.23

[1] Includes discontinued intercompany eliminations