Reportable Segments Other Intangibles, Net (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Other intangibles, net	$ 1,957	$ 1,809
Operating Segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Other intangibles, net	742	439
Operating Segments | Products Pipelines
Segment Reporting Information [Line Items]
Other intangibles, net	687	777
Operating Segments | Terminals
Segment Reporting Information [Line Items]
Other intangibles, net	26	38
Operating Segments | CO2
Segment Reporting Information [Line Items]
Other intangibles, net	$ 502	$ 555