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SEGMENTS - Reconciliations for Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Segment Reporting Information [Line Items]          
Total revenues (Note K) $ 5,023 $ 4,189 $ 14,698 $ 12,442  
Cost of sales and fuel (exclusive of depreciation and operating costs) (3,027) (2,799) (8,815) (8,628)  
Operating costs (582) (352) (1,720) (981)  
Depreciation and amortization (274) (177) (790) (509)  
Equity in net earnings from investments 92 49 256 132  
Investments in unconsolidated affiliates 1,925 1,795 1,925 1,795 $ 1,874
Total assets 51,050 43,939 51,050 43,939 $ 44,266
Capital expenditures 468 398 1,459 992  
Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 5,718 4,817 16,746 14,236  
Cost of sales and fuel (exclusive of depreciation and operating costs) (3,723) (3,426) (10,866) (10,423)  
Operating costs (581) (351) (1,717) (978)  
Depreciation and amortization (274) (176) (786) (506)  
Equity in net earnings from investments 92 49 256 132  
Investments in unconsolidated affiliates 1,922 1,794 1,922 1,794  
Total assets 44,549 43,582 44,549 43,582  
Capital expenditures 450 386 1,411 959  
Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 171 146 519 463  
Cost of sales and fuel (exclusive of depreciation and operating costs) (1) (2) (18) (17)  
Operating costs (52) (51) (157) (145)  
Depreciation and amortization (21) (17) (57) (50)  
Equity in net earnings from investments 34 29 102 89  
Investments in unconsolidated affiliates 516 440 516 440  
Total assets 2,704 2,433 2,704 2,433  
Capital expenditures 56 70 187 155  
Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 963 72 2,821 72  
Cost of sales and fuel (exclusive of depreciation and operating costs) (352) (22) (1,017) (22)  
Operating costs (217) (13) (650) (13)  
Depreciation and amortization (93) (6) (254) (6)  
Equity in net earnings from investments 35 3 90 3  
Investments in unconsolidated affiliates 958 911 958 911  
Total assets 19,031 19,185 19,031 19,185  
Capital expenditures 45 1 120 1  
Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) (695) (628) (2,048) (1,794)  
Cost of sales and fuel (exclusive of depreciation and operating costs) 696 627 2,051 1,795  
Operating costs (1) (1) (3) (3)  
Depreciation and amortization 0 (1) (4) (3)  
Equity in net earnings from investments 0 0 0 0  
Investments in unconsolidated affiliates 3 1 3 1  
Total assets 6,501 357 6,501 357  
Capital expenditures 18 12 48 33  
NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,449   10,159  
NGL and condensate sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   4,073   11,938  
NGL and condensate sales | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   0   0  
NGL and condensate sales | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   0   0  
NGL and condensate sales | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   (624)   (1,779)  
Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,860   11,241    
Liquids commodity sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 4,551   13,266    
Liquids commodity sales | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0   0    
Liquids commodity sales | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 407   1,250    
Liquids commodity sales | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) (691)   (2,025)    
Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 219 282 760 1,094  
Residue natural gas sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 219 282 760 1,094  
Residue natural gas sales | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 3 28 28  
Residue natural gas sales | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Residue natural gas sales | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 164 186 491 523  
Gathering, processing and exchange services revenue | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 164 186 491 523  
Gathering, processing and exchange services revenue | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Gathering, processing and exchange services revenue | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Gathering, processing and exchange services revenue | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 743 188 2,106 570  
Transportation and storage revenue | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 747 191 2,122 577  
Transportation and storage revenue | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 171 143 491 434  
Transportation and storage revenue | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 526 0 1,490 0  
Transportation and storage revenue | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) (4) (3) (16) (7)  
Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 37 84 100 96  
Other | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 37 85 107 104  
Other | Operating segments | Natural Gas Pipelines          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 1  
Other | Operating segments | Refined Products and Crude (c)          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 30 72 81 72  
Other | Other and Eliminations          
Segment Reporting Information [Line Items]          
Total revenues (Note K) $ 0 $ (1) $ (7) $ (8)