CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES
Gas sales		$ 129.4	$ 171.6	$ 363.3	$ 609.2
Oil sales		211.7	393.5	640.9	1,041.0
NGL sales		16.5	51.1	61.7	179.3
Other revenue		2.8	3.4	12.4	5.1
Purchased gas and oil sales		176.3	290.4	558.6	780.1
Total Revenues		536.7	910.0	1,636.9	2,614.7
OPERATING EXPENSES
Purchased gas and oil expense		175.1	288.4	561.7	775.5
Lease operating expense		56.7	61.1	175.6	177.0
Gas, oil and NGL transportation and other handling costs		78.1	71.1	216.2	198.5
Gathering and other expense		1.3	1.4	4.4	4.8
General and administrative		42.0	49.4	140.7	147.0
Production and property taxes		30.2	59.4	90.7	160.8
Depreciation, depletion and amortization		238.1	251.4	649.3	712.5
Exploration expenses		0.8	0.8	2.7	4.7
Impairment		15.0	0.1	35.5	3.6
Total operating expenses		637.3	783.1	1,876.8	2,184.4
Net gain (loss) from asset sales		12.9	(11.8)	6.9	(210.3)
OPERATING INCOME (LOSS)		(87.7)	115.1	(233.0)	220.0
Realized and unrealized gains (losses) on derivative contracts (Note 8)		153.6	155.7	168.5	(13.2)
Interest and other income		0.3	4.2	1.5	7.8
Income from unconsolidated affiliates		0.0	0.1	0.0	0.2
Interest expense		(36.4)	(41.5)	(109.4)	(128.4)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		29.8	233.6	(172.4)	86.4
Income tax (provision) benefit		(8.7)	(79.9)	61.6	(26.1)
NET INCOME (LOSS) FROM CONTINUING OPERATIONS		21.1	153.7	(110.8)	60.3
Net income from discontinued operations, net of income tax		0.0	17.4	0.0	58.2
NET INCOME (LOSS)		$ 21.1	$ 171.1	$ (110.8)	$ 118.5
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		$ 0.12	$ 0.95	$ (0.63)	$ 0.66
Earnings Per Share, Diluted		$ 0.12	$ 0.94	$ (0.63)	$ 0.66
Weighted-average common shares outstanding
Used in basic calculation (in shares)		176.7	180.1	176.5	180.0
Used in diluted calculation (in shares)		176.7	180.6	176.5	180.4
Dividends per common share (in dollars per share)		$ 0.02	$ 0.02	$ 0.06	$ 0.06
Continuing Operations [Member]
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		0.12	0.85	(0.63)	0.34
Earnings Per Share, Diluted		0.12	$ 0.84	(0.63)	$ 0.34
Discontinued Operations [Member]
REVENUES
NGL sales			$ 28.8		$ 94.6
Other revenue			43.1		119.9
Purchased gas and oil sales	[1]		(11.9)		(38.5)
Total Revenues			60.0		176.0
OPERATING EXPENSES
Purchased gas and oil expense	[1]		(12.4)		(39.5)
Lease operating expense	[1]		(1.7)		(4.8)
Gas, oil and NGL transportation and other handling costs	[1]		(10.6)		(40.1)
Gathering and other expense			22.7		69.8
General and administrative			11.1		34.3
Production and property taxes			2.1		6.1
Depreciation, depletion and amortization			14.3		43.1
Total operating expenses			25.5		68.9
Net gain (loss) from asset sales			0.0		(0.1)
OPERATING INCOME (LOSS)			34.5		107.0
Interest expense			(1.5)		(2.8)
Net income from discontinued operations, net of income tax			$ 17.4		$ 58.2
Earnings Per Common Share Attributable to QEP
Earnings Per Share, Basic		0.00	$ 0.10	0.00	$ 0.32
Earnings Per Share, Diluted		$ 0.00	$ 0.10	$ 0.00	$ 0.32

[1] Includes discontinued intercompany eliminations