XML 71 R99.htm IDEA: XBRL DOCUMENT v3.19.3
Subsequent Events (Details Textuals) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended 9 Months Ended 13 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2020
Subsequent Event [Line Items]          
Estimated purchase price     $ 174 $ 0  
Subsequent Event | Forecast | M5 Louisiana Gathering, LLC          
Subsequent Event [Line Items]          
Percent of assets acquired 100.00%        
Estimated purchase price $ 2,250 $ 400     $ 2,650