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Reportable Segments Segment earnings before depreciation, depletion, amortization and amortization of excess cost of equity investments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
DD&A $ (2,250) $ (2,186) $ (2,135)
Amortization of excess cost of equity investments (66) (75) (78)
General and administrative and corporate charges 759 593 623
Interest, net (1,797) (1,513) (1,492)
Income tax expense (715) (710) (369)
Net income (loss) 2,486 2,625 1,850
Operating Segments      
Segment Reporting Information [Line Items]      
Net income (loss) 8,073 7,702 6,547
Operating Segments | Natural Gas Pipelines      
Segment Reporting Information [Line Items]      
DD&A (1,041) (1,096) (1,099)
Net income (loss) 5,282 4,801 3,815
Operating Segments | Products Pipelines      
Segment Reporting Information [Line Items]      
DD&A (367) (336) (335)
Net income (loss) 1,062 1,107 1,064
Operating Segments | Terminals      
Segment Reporting Information [Line Items]      
DD&A (493) (458) (440)
Net income (loss) 1,040 975 908
Operating Segments | CO2      
Segment Reporting Information [Line Items]      
DD&A (325) (272) (236)
Net income (loss) 689 819 760
Other      
Segment Reporting Information [Line Items]      
DD&A $ (24) $ (24) $ (25)