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Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue [Abstract]        
Revenues $ 11,998 $ 15,468 $ 35,093 $ 44,536
NGL Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 3,757 6,237 12,375 18,371
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member]        
Revenue [Abstract]        
Revenues 3,021 5,519 10,325 16,139
NGL Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 736 718 2,050 2,232
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member]        
Revenue [Abstract]        
Revenues 344 340 944 1,143
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 286 250 798 708
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues 106 128 308 381
Crude Oil Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 5,365 4,724 13,850 14,181
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member]        
Revenue [Abstract]        
Revenues 5,068 4,455 12,999 13,202
Crude Oil Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 297 269 851 979
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 194 162 549 650
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues 103 107 302 329
Natural Gas Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 884 1,886 2,874 4,696
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member]        
Revenue [Abstract]        
Revenues 537 1,556 1,828 3,795
Natural Gas Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 347 330 1,046 901
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 347 330 1,046 901
Petrochemical & Refined Products Services [Member]        
Revenue [Abstract]        
Revenues 1,992 2,621 5,994 7,288
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member]        
Revenue [Abstract]        
Revenues 1,647 2,346 5,052 6,470
Petrochemical & Refined Products Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 345 275 942 818
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member]        
Revenue [Abstract]        
Revenues 94 56 208 172
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 171 149 486 426
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues $ 80 $ 70 $ 248 $ 220