Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Debt Outstanding

	December 31,
	2013			2012
	(in millions)
QEP's revolving credit facility due 2016	$	480.0		$	690.0
QEP Midstream's revolving credit facility due 2018	—			—
Term loan due 2017	300.0			300.0
6.05% Senior Notes due 2016	176.8			176.8
6.80% Senior Notes due 2018	134.0			134.0
6.80% Senior Notes due 2020	136.0			136.0
6.875% Senior Notes due 2021	625.0			625.0
5.375% Senior Notes due 2022	500.0			500.0
5.25% Senior Notes due 2023	650.0			650.0
Total principal amount of debt	3,001.8			3,211.8
Less unamortized discount	(4.3		)	(4.9		)
Total long-term debt outstanding	$	2,997.5		$	3,206.9