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SEGMENTS - Operating Segments Financial Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
segment
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | segment     4    
Total revenues (Note K) $ 4,894 $ 3,732 $ 9,675 $ 8,253  
Cost of sales and fuel (exclusive of depreciation and operating costs) (2,891) (2,482) (5,788) (5,829)  
Operating costs (573) (343) (1,145) (639)  
Adjusted EBITDA from unconsolidated affiliates 110 53 211 109  
Noncash compensation expense 19 8 34 18  
Other 61 0 67 781  
Segment adjusted EBITDA 1,625 979 3,065 2,705  
Depreciation and amortization (262) (170) (516) (332)  
Equity in net earnings from investments 88 43 164 83  
Investments in unconsolidated affiliates 1,937 885 1,937 885 $ 1,874
Total assets 44,535 24,038 44,535 24,038 $ 44,266
Capital expenditures 479 305 991 594  
Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 5,553 4,255 11,028 9,419  
Cost of sales and fuel (exclusive of depreciation and operating costs) (3,551) (3,013) (7,143) (6,997)  
Operating costs (568) (325) (1,136) (627)  
Adjusted EBITDA from unconsolidated affiliates 110 53 211 109  
Noncash compensation expense 21 9 42 24  
Other 60   63 777  
Segment adjusted EBITDA 1,625 979 3,065 2,705  
Depreciation and amortization (259) (168) (512) (330)  
Equity in net earnings from investments 88 43 164 83  
Investments in unconsolidated affiliates 1,933 884 1,933 884  
Total assets 44,461 23,584 44,461 23,584  
Capital expenditures 471 292 961 573  
Natural Gas Gathering and Processing | Natural Gas Gathering and Processing Intersegment          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 632 521 1,300 1,200  
Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 846 809 1,856 2,067  
Cost of sales and fuel (exclusive of depreciation and operating costs) (421) (385) (1,015) (1,260)  
Operating costs (119) (115) (236) (220)  
Adjusted EBITDA from unconsolidated affiliates 1 1 3 2  
Noncash compensation expense 5 3 9 8  
Other 59   60 1  
Segment adjusted EBITDA 371 313 677 598  
Depreciation and amortization (74) (67) (144) (134)  
Equity in net earnings from investments 0 1 2 1  
Investments in unconsolidated affiliates 30 27 30 27  
Total assets 7,096 6,854 7,096 6,854  
Capital expenditures 101 84 217 182  
Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,530 3,300 6,966 7,035  
Cost of sales and fuel (exclusive of depreciation and operating costs) (2,748) (2,627) (5,446) (5,722)  
Operating costs (181) (161) (362) (313)  
Adjusted EBITDA from unconsolidated affiliates 27 16 44 27  
Noncash compensation expense 7 5 15 13  
Other 0   6 776  
Segment adjusted EBITDA 635 533 1,223 1,816  
Depreciation and amortization (86) (85) (171) (163)  
Equity in net earnings from investments 24 13 39 22  
Investments in unconsolidated affiliates 418 414 418 414  
Total assets 15,735 14,346 15,735 14,346  
Capital expenditures 285 169 538 306  
Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 163 146 348 317  
Cost of sales and fuel (exclusive of depreciation and operating costs) (2) (1) (17) (15)  
Operating costs (52) (49) (105) (94)  
Adjusted EBITDA from unconsolidated affiliates 41 36 88 80  
Noncash compensation expense 2 1 4 3  
Other 0   (1) 0  
Segment adjusted EBITDA 152 133 317 291  
Depreciation and amortization (18) (16) (36) (33)  
Equity in net earnings from investments 32 29 68 60  
Investments in unconsolidated affiliates 518 443 518 443  
Total assets 2,667 2,384 2,667 2,384  
Capital expenditures 52 39 131 85  
Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 1,014   1,858    
Cost of sales and fuel (exclusive of depreciation and operating costs) (380)   (665)    
Operating costs (216)   (433)    
Adjusted EBITDA from unconsolidated affiliates 41   76    
Noncash compensation expense 7   14    
Other 1   (2)    
Segment adjusted EBITDA 467   848    
Depreciation and amortization (81)   (161)    
Equity in net earnings from investments 32   55    
Investments in unconsolidated affiliates 967   967    
Total assets 18,963   18,963    
Capital expenditures 33   75    
NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,149   6,710  
NGL and condensate sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,670   7,865  
NGL and condensate sales | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   550   1,194  
NGL and condensate sales | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,120   6,671  
NGL and condensate sales | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   0   0  
Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,825   7,381    
Liquids commodity sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 4,477   8,715    
Liquids commodity sales | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 641   1,264    
Liquids commodity sales | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,344   6,608    
Liquids commodity sales | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0   0    
Liquids commodity sales | Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 492   843    
Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 169 219 541 812  
Residue natural gas sales | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 169 219 541 812  
Residue natural gas sales | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 169 219 513 787  
Residue natural gas sales | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Residue natural gas sales | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 28 25  
Residue natural gas sales | Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0   0    
Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 170 168 327 337  
Gathering, processing and exchange services revenue | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 170 168 327 337  
Gathering, processing and exchange services revenue | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 31 35 66 73  
Gathering, processing and exchange services revenue | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 139 133 261 264  
Gathering, processing and exchange services revenue | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Gathering, processing and exchange services revenue | Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0   0    
Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 699 189 1,363 382  
Transportation and storage revenue | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 704 191 1,375 386  
Transportation and storage revenue | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Transportation and storage revenue | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 43 45 91 95  
Transportation and storage revenue | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 163 146 320 291  
Transportation and storage revenue | Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 498   964    
Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 31 7 63 12  
Other | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 33 7 70 19  
Other | Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 5 5 13 13  
Other | Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 4 2 6 5  
Other | Natural Gas Pipelines | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 $ 0 0 $ 1  
Other | Refined Products and Crude | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) $ 24   $ 51