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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Narrative (Details)
6 Months Ended 9 Months Ended
Sep. 21, 2022
USD ($)
Aug. 01, 2020
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Document Period End Date       Sep. 30, 2022    
Accrual for Environmental Loss Contingencies       $ 277,000,000   $ 293,000,000
Loss Contingency, Estimate of Possible Loss       750,000,000    
Litigation Settlement, Expense       161,000,000    
Payments for Environmental Liabilities       8,000,000 $ 18,000,000  
Legal Fees       18,000,000    
Proposed Civil Penalty            
Payments for Legal Settlements       20,000,000    
Litigation Settlement, Expense       40,000,000    
Related To Deductibles            
Loss Contingency Accrual, at Carrying Value       $ 343,000,000   $ 144,000,000
Sunoco, Inc. [Member]            
Loss Contingency, Pending Claims, Number       4    
Sunoco [Member]            
Site Contingency, Number of Sites Needing Remediation       34    
Culberson            
Loss Contingency, Damages Sought, Value       $ 93,064,891    
Sunoco Pipeline, LP            
Payments for Environmental Liabilities       10,000,000    
Williams Litigation [Member]            
Loss Contingency, Damages Sought, Value       410,000,000    
Litigation Settlement, Expense $ 601,000,000          
Debt Instrument, Interest Rate, Stated Percentage 3.50%          
Cline Class Action | Actual Damages            
Payments for Legal Settlements   $ 74,800,000 $ 80,700,000      
Cline Class Action | punitive damages            
Payments for Legal Settlements     $ 75,000,000      
Clean Water Fund Pennsylvania Department of Environmental Protection            
Payments for Environmental Liabilities       22,500    
Clean Water Fund Pennsylvania Department of Environmental Protection | Sunoco Pipeline, LP            
Payments for Environmental Liabilities       35,000    
Homeowner Well Water Supply Grievance Program | Sunoco Pipeline, LP            
Payments for Environmental Liabilities       $ 442,500