Other Information (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other current assets:
Natural gas and NGLs inventory	$ 36.8	$ 44.9
Prepaid expenses and other	28.8	13.8
Other current assets	65.6	58.7
Other current liabilities:
Accrued interest	74.1	35.7
Accrued wages and benefits, including taxes	8.8	22.5
Accrued ad valorem taxes	12.1	26.5
Capital expenditure accruals	8.7	10.6
Short-term lease liability	19.2	16.3
Operating expense accruals	17.8	8.4
Other	25.2	29.1
Other current liabilities	$ 165.9	$ 149.1