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SEGMENTS - Operating Segments Financial Information (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
segment
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | segment     4    
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)  
Adjusted EBITDA from unconsolidated affiliates 112 63 323 172  
Noncash compensation expense 14 14 48 32  
Other operating income, net (Note C) (2) 1 65 782  
Segment adjusted EBITDA 1,549 1,116 4,614 3,821  
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  
NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,449   10,159  
Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,860   11,241    
Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 219 282 760 1,094  
Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 164 186 491 523  
Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 743 188 2,106 570  
Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 37 84 100 96  
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)  
Adjusted EBITDA from unconsolidated affiliates 112 63 323 172  
Noncash compensation expense 23 13 72 38  
Other operating income, net (Note C)     56 776  
Segment adjusted EBITDA 1,549 1,116 4,614 3,821  
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 | NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   4,073   11,938  
Operating segments | Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 4,551   13,266    
Operating segments | Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 219 282 760 1,094  
Operating segments | Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 164 186 491 523  
Operating segments | Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 747 191 2,122 577  
Operating segments | Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 37 85 107 104  
Natural Gas Gathering and Processing | Natural Gas Gathering and Processing Intersegment          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 657 620 1,900 1,800  
Natural Gas Gathering and Processing | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 905 965 2,761 3,032  
Cost of sales and fuel (exclusive of depreciation and operating costs) (464) (527) (1,479) (1,787)  
Operating costs (129) (119) (365) (339)  
Adjusted EBITDA from unconsolidated affiliates 0 0 3 2  
Noncash compensation expense 6 4 16 13  
Other operating income, net (Note C)     59 0  
Segment adjusted EBITDA 318 323 995 921  
Depreciation and amortization (71) (68) (215) (202)  
Equity in net earnings from investments (1) 0 1 1  
Investments in unconsolidated affiliates 31 26 31 26  
Total assets 7,113 6,976 7,113 6,976  
Capital expenditures 102 126 319 308  
Natural Gas Gathering and Processing | Operating segments | NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   641   1,835  
Natural Gas Gathering and Processing | Operating segments | Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 648   1,912    
Natural Gas Gathering and Processing | Operating segments | Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 219 279 732 1,066  
Natural Gas Gathering and Processing | Operating segments | Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 35 36 101 109  
Natural Gas Gathering and Processing | Operating segments | Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Natural Gas Gathering and Processing | Operating segments | Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3 9 16 22  
Natural Gas Liquids | Operating segments          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,679 3,634 10,645 10,669  
Cost of sales and fuel (exclusive of depreciation and operating costs) (2,906) (2,875) (8,352) (8,597)  
Operating costs (183) (168) (545) (481)  
Adjusted EBITDA from unconsolidated affiliates 26 19 70 46  
Noncash compensation expense 8 6 26 20  
Other operating income, net (Note C)     3 775  
Segment adjusted EBITDA 624 616 1,847 2,432  
Depreciation and amortization (89) (85) (260) (248)  
Equity in net earnings from investments 24 17 63 39  
Investments in unconsolidated affiliates 417 417 417 417  
Total assets 15,701 14,988 15,701 14,988  
Capital expenditures 247 189 785 495  
Natural Gas Liquids | Operating segments | NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   3,432   10,103  
Natural Gas Liquids | Operating segments | Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 3,496   10,104    
Natural Gas Liquids | Operating segments | Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Natural Gas Liquids | Operating segments | Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 129 150 390 414  
Natural Gas Liquids | Operating segments | Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 50 48 141 143  
Natural Gas Liquids | Operating segments | Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 4 4 10 9  
Natural Gas Pipelines | Operating segments          
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)  
Adjusted EBITDA from unconsolidated affiliates 45 40 133 120  
Noncash compensation expense 3 3 6 5  
Other operating income, net (Note C)     0 1  
Segment adjusted EBITDA 166 136 483 427  
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  
Natural Gas Pipelines | Operating segments | NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   0   0  
Natural Gas Pipelines | Operating segments | Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0   0    
Natural Gas Pipelines | Operating segments | Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 3 28 28  
Natural Gas Pipelines | Operating segments | Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Natural Gas Pipelines | Operating segments | Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 171 143 491 434  
Natural Gas Pipelines | Operating segments | Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 1  
Refined Products and Crude | Operating segments          
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)  
Adjusted EBITDA from unconsolidated affiliates 41 4 117 4  
Noncash compensation expense 6 0 24 0  
Other operating income, net (Note C)     (6) 0  
Segment adjusted EBITDA 441 41 1,289 41  
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  
Refined Products and Crude | Operating segments | NGL and condensate sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K)   0   0  
Refined Products and Crude | Operating segments | Liquids commodity sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 407   1,250    
Refined Products and Crude | Operating segments | Residue natural gas sales          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Refined Products and Crude | Operating segments | Gathering, processing and exchange services revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 0 0 0 0  
Refined Products and Crude | Operating segments | Transportation and storage revenue          
Segment Reporting Information [Line Items]          
Total revenues (Note K) 526 0 1,490 0  
Refined Products and Crude | Operating segments | Other          
Segment Reporting Information [Line Items]          
Total revenues (Note K) $ 30 $ 72 $ 81 $ 72