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Reportable Segments Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 15,334	$ 19,200	$ 16,610
Other
Segment Reporting Information [Line Items]
Revenues	(26)	(30)	(68)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(26)	(30)	(68)
Natural Gas Pipelines
Segment Reporting Information [Line Items]
Revenues	9,152	12,659	11,644
Natural Gas Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Revenues	9,168	12,686	11,709
Natural Gas Pipelines | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(16)	(27)	(65)
Products Pipelines
Segment Reporting Information [Line Items]
Revenues	3,066	3,418	2,245
Products Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,066	3,418	2,245
Terminals
Segment Reporting Information [Line Items]
Revenues	1,911	1,789	1,712
Terminals | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,917	1,792	1,715
Terminals | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(6)	(3)	(3)
CO2
Segment Reporting Information [Line Items]
Revenues	1,205	1,334	1,009
CO2 | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,209	1,334	1,009
CO2 | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	$ (4)	$ 0	$ 0
Revenue Benchmark | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage Meet Certain Threshold	10.00%	10.00%	10.00%

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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