Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt Outstanding [Table Text Block]

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

	March 31, 2019			December 31, 2018
	(in millions)
Revolving Credit Facility due 2022	$	—		$	430.0
6.80% Senior Notes due 2020	51.7			51.7
6.875% Senior Notes due 2021	397.6			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	(20.9		)	(22.2		)
Total principal amount of debt (including current portion)	2,078.4			2,507.1
Less: current portion of long-term debt	(51.7		)	—
Total long-term debt outstanding	$	2,026.7		$	2,507.1