Acquisitions & Divestitures (Tables)

6 Months Ended

Jun. 30, 2014

Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]

Business Combination, Separately Recognized Transactions [Table Text Block]

	As of June 30, 2014
	(in millions)
Consideration given:
Cash Consideration	$	945.0
Consideration receivable	(2.9		)
Total consideration given	$	942.1
Amounts recognized for preliminary fair value of assets acquired and liabilities assumed:
Proved properties	$	472.1
Unproved properties	480.9
Asset retirement obligations	(9.7		)
Liabilities assumed	(1.2		)
Total fair value	$	942.1

Business Acquisition, Pro Forma Information [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2013		2014			2014			2013		2013
	Actual		Pro forma		Actual			Pro forma			Actual		Pro forma
					(in millions, except per share data)
Revenues	$	751.0	$	790.1	$	1,820.6		$	1,846.7		$	1,447.5	$	1,521.1
Net income (loss) attributable to QEP	178.4		182.6		(52.6		)	(45.6		)	174.1		186.2
Earnings per common share attributable to QEP
Basic	$	0.99	$	1.02	$	(0.29	)	$	(0.25	)	$	0.97	$	1.04
Diluted	0.99		1.02		(0.29		)	(0.25		)	0.97		1.04