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Other Information (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Other current assets:    
Natural gas and NGLs inventory $ 76.5 $ 44.9
Prepaid expenses and other 40.1 13.8
Other current assets 116.6 58.7
Other current liabilities:    
Accrued interest 49.7 35.7
Accrued wages and benefits, including taxes 18.2 22.5
Accrued ad valorem taxes 22.8 26.5
Capital expenditure accruals 17.3 10.6
Short-term lease liability 17.3 16.3
Operating expense accruals 11.7 8.4
Other 33.1 29.1
Other current liabilities $ 170.1 $ 149.1