Other Information (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other current assets:
Natural gas and NGLs inventory	$ 63.9	$ 43.4
Prepaid expenses and other	17.8	14.4
Other current assets	81.7	57.8
Other current liabilities:
Accrued interest	66.7	37.1
Accrued wages and benefits, including taxes	18.3	31.5
Accrued ad valorem taxes	33.9	28.5
Capital expenditure accruals	12.1	42.4
Retainage liability	11.8	8.7
Short-term lease liability	17.1	21.1
Suspense producer payments	10.3	13.8
Operating expense accruals	10.5	10.8
Other	18.1	12.3
Other current liabilities	$ 198.8	$ 206.2