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Reportable Segments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Revenues $ 15,100 $ 15,334 $ 19,200
Costs of sales (4,337) (4,938) (9,255)
Taxes, other than income taxes (433) (421) (441)
Earnings from equity investments 890 838 803
Net income 2,720 2,486 2,625
Depreciation, depletion and amortization 2,354 2,250 2,186
Amortization of excess cost of equity investments (50) (66) (75)
General and administrative and corporate charges (736) (759) (593)
Interest, net (1,844) (1,797) (1,513)
Income Tax Expense (687) (715) (710)
Capital Expenditures 2,629 2,317 1,621
Investments 7,845 7,874  
Other intangibles, net 1,760 1,957  
Assets 71,407 71,020  
Non-cash mark-to-market derivative hedge contract (72) 126 (56)
Operating Segments      
Segment Reporting Information [Line Items]      
Net income 8,391 8,073 7,702
Other      
Segment Reporting Information [Line Items]      
Revenues (23) (26) (30)
Depreciation, depletion and amortization 22 24 24
Capital Expenditures 34 36 32
Investments 0 0  
Other intangibles, net 0 0  
Assets 697 624  
Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Revenues (23) (26) (30)
Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
Revenues 8,930 9,152 12,659
Natural Gas Pipelines | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 8,942 9,168 12,686
Costs of sales (2,837) (3,258) (7,171)
Labor (322) (300) (282)
Fuel and power (74) (79) (78)
Field - non-labor(a) (854) (801) (763)
Taxes, other than income taxes (269) (262) (268)
Earnings from equity investments 782 776 683
Other segment items(b) 59 38 (6)
Net income 5,427 5,282 4,801
Depreciation, depletion and amortization 1,105 1,041 1,096
Capital Expenditures 1,654 1,299 666
Investments 7,252 7,273  
Other intangibles, net 687 742  
Assets 50,402 49,883  
Non-cash mark-to-market derivative hedge contract (75) 122 (64)
Natural Gas Pipelines | Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Revenues (12) (16) (27)
Products Pipelines      
Segment Reporting Information [Line Items]      
Revenues 2,955 3,066 3,418
Products Pipelines | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 2,955 3,066 3,418
Costs of sales (1,394) (1,588) (1,972)
Labor (128) (121) (99)
Fuel and power (92) (88) (81)
Field - non-labor(a) (193) (185) (194)
Taxes, other than income taxes (43) (42) (45)
Earnings from equity investments 66 23 68
Other segment items(b) 2 (3) 12
Net income 1,173 1,062 1,107
Depreciation, depletion and amortization 365 367 336
Capital Expenditures 210 221 0
Investments 387 390  
Other intangibles, net 597 687  
Assets 8,639 8,781  
Non-cash mark-to-market derivative hedge contract   1  
Products Pipelines | Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Revenues 0 0 0
Terminals      
Segment Reporting Information [Line Items]      
Revenues 2,013 1,911 1,789
Terminals | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 2,022 1,917 1,792
Costs of sales (42) (33) (26)
Labor (273) (254) (239)
Fuel and power (20) (19) (17)
Field - non-labor(a) (558) (535) (518)
Taxes, other than income taxes (53) (55) (53)
Earnings from equity investments 8 9 14
Other segment items(b) 15 10 22
Net income 1,099 1,040 975
Depreciation, depletion and amortization 508 493 458
Capital Expenditures 385 406 552
Investments 132 130  
Other intangibles, net 18 26  
Assets 8,086 8,235  
Terminals | Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Revenues (9) (6) (3)
CO2      
Segment Reporting Information [Line Items]      
Revenues 1,202 1,205 1,334
CO2 | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 1,204 1,209 1,334
Costs of sales (82) (77) (109)
Labor (50) (49) (41)
Fuel and power (153) (137) (132)
Field - non-labor(a) (241) (232) (207)
Taxes, other than income taxes (60) (55) (65)
Earnings from equity investments 34 30 38
Other segment items(b) 40 0 1
Net income 692 689 819
Depreciation, depletion and amortization 354 325 272
Capital Expenditures 346 355 371
Investments 74 81  
Other intangibles, net 458 502  
Assets 3,583 3,497  
Non-cash mark-to-market derivative hedge contract (2) (4) 11
CO2 | Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Revenues $ (2) $ (4) $ 0
Revenue Benchmark | Customer Concentration Risk      
Segment Reporting Information [Line Items]      
Concentration Risk, Percentage Meet Certain Threshold 10.00% 10.00% 10.00%