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Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenue [Abstract]    
Revenues $ 12,444 $ 13,008
NGL Pipelines & Services [Member]    
Revenue [Abstract]    
Revenues 4,929 5,754
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member]    
Revenue [Abstract]    
Revenues 4,264 5,040
NGL Pipelines & Services [Member] | Midstream Services [Member]    
Revenue [Abstract]    
Revenues 665 714
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member]    
Revenue [Abstract]    
Revenues 300 340
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member]    
Revenue [Abstract]    
Revenues 266 229
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]    
Revenue [Abstract]    
Revenues 99 145
Crude Oil Pipelines & Services [Member]    
Revenue [Abstract]    
Revenues 4,181 4,072
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member]    
Revenue [Abstract]    
Revenues 3,926 3,716
Crude Oil Pipelines & Services [Member] | Midstream Services [Member]    
Revenue [Abstract]    
Revenues 255 356
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member]    
Revenue [Abstract]    
Revenues 155 239
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]    
Revenue [Abstract]    
Revenues 100 117
Natural Gas Pipelines & Services [Member]    
Revenue [Abstract]    
Revenues 1,215 1,149
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member]    
Revenue [Abstract]    
Revenues 846 880
Natural Gas Pipelines & Services [Member] | Midstream Services [Member]    
Revenue [Abstract]    
Revenues 369 269
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member]    
Revenue [Abstract]    
Revenues 369 269
Petrochemical & Refined Products Services [Member]    
Revenue [Abstract]    
Revenues 2,119 2,033
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member]    
Revenue [Abstract]    
Revenues 1,814 1,754
Petrochemical & Refined Products Services [Member] | Midstream Services [Member]    
Revenue [Abstract]    
Revenues 305 279
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member]    
Revenue [Abstract]    
Revenues 63 69
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member]    
Revenue [Abstract]    
Revenues 160 138
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member]    
Revenue [Abstract]    
Revenues $ 82 $ 72