Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Debt Outstanding

As of the indicated dates, the principal amount of QEP’s debt, including amounts outstanding under QEP's revolving credit facility and senior notes, consisted of the following:

	June 30, 2015			December 31, 2014
	(in millions)
Revolving Credit Facility due 2019	$	—		$	—
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	2,221.8			2,221.8
Less unamortized discount	(3.3		)	(3.7		)
Total long-term debt outstanding	$	2,218.5		$	2,218.1