Reportable Segments Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 16,610	$ 11,700	$ 13,209
Other
Segment Reporting Information [Line Items]
Revenues	(68)	(40)	(45)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(68)	(40)	(45)
Natural Gas Pipelines
Segment Reporting Information [Line Items]
Revenues	11,644	7,222	8,128
Natural Gas Pipelines | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(65)	(37)	(42)
Products Pipelines
Segment Reporting Information [Line Items]
Revenues	2,245	1,721	1,831
Terminals
Segment Reporting Information [Line Items]
Revenues	1,712	1,719	2,031
Terminals | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(3)	(3)	(3)
CO2
Segment Reporting Information [Line Items]
Revenues	$ 1,009	$ 1,038	$ 1,219
Revenue Benchmark | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage Meet Certain Threshold	10.00%	10.00%	10.00%