Quarterly report pursuant to Section 13 or 15(d)

Transportation and Distribution Revenue - Schedules of Concentration of Risk (Details)

v3.21.2
Transportation and Distribution Revenue - Schedules of Concentration of Risk (Details) - Product and services - Revenue
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Crude oil transportation revenue        
Concentration Risk [Line Items]        
Concentration percentage 81.70% 0.00% 78.30% 0.00%
Natural gas transportation revenue        
Concentration Risk [Line Items]        
Concentration percentage 12.90% 68.00% 14.90% 68.40%
Natural gas distribution revenue        
Concentration Risk [Line Items]        
Concentration percentage 4.20% 27.20% 4.80% 25.00%