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Estimates, Significant Accounting Policies and Balance Sheet Detail (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Nov. 03, 2023
Apr. 01, 2022
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Impairment losses and other       $ 12 $ 386 $ 21
Asset Retirement Obligation     $ 410 410 362  
Costs Incurred, Asset Retirement Obligation Incurred       10 4 12
Asset Retirement Obligation, Legally Restricted Assets, Fair Value     31 31 27  
Long-term Debt, Fair Value     51,930 51,930 45,420  
Goodwill       1,455 33  
Goodwill     4,019 4,019 2,566 2,533
Long-term Debt     $ 52,388 52,388 48,262  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net       0    
Inventory Write-down       114 5 190
Revenues       78,586 89,876 67,417
Related Party            
Revenues       $ 626 391 410
Minimum [Member] | Product storage and related facilities            
Property, plant and equipment, useful life, minimum (years)     2 years 2 years    
Maximum [Member] | Product storage and related facilities            
Property, plant and equipment, useful life, minimum (years)     83 years 83 years    
Reporting units for which the estimated FV exceeds the carrying value by less than 20%            
Goodwill     $ 368 $ 368    
Midstream            
Goodwill       601 0  
Goodwill     601 601 0 0
All Other            
Goodwill       0 0  
Goodwill     82 82 82 82
Investment in Sunoco LP            
Goodwill       0 33  
Goodwill     1,599 1,599 1,601 1,568
Retail Marketing [Member]            
Excise Taxes Collected       274 285 332
Interstate Transportation and Storage            
Goodwill       0 0  
Goodwill     0 0 0 0
Investment in USAC            
Goodwill       0 0  
Goodwill     0 0 0 0
Crude Oil Transportation and Services            
Goodwill       663 0  
Goodwill     853 853 190 190
Intrastate Transportation and Storage            
Goodwill       0 0  
Goodwill     0 0 0 0
Sunoco LP [Member]            
Goodwill   $ 20        
Long-term Debt     3,580 3,580 3,571  
Inventory, LIFO Reserve     230 230 116  
USAC [Member]            
Impairment losses and other       12 $ 1 $ 5
Sunoco LP [Member]            
Goodwill       $ 33    
Crestwood Acquisition            
Goodwill $ 1,455   $ 1,460