Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Debt Outstanding

As of the indicated dates, the principal amount of QEP's debt consisted of the following:

	December 31,
	2019			2018
	(in millions)
Revolving Credit Facility due 2022	$	—		$	430.0
6.80% Senior Notes due 2020	—			51.7
6.875% Senior Notes due 2021	382.4			397.6
5.375% Senior Notes due 2022	500.0			500.0
5.25% Senior Notes due 2023	650.0			650.0
5.625% Senior Notes due 2026	500.0			500.0
Less: unamortized discount and unamortized debt issuance costs	(16.8		)	(22.2		)
Total long-term debt outstanding	$	2,015.6		$	2,507.1