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Acquisitions and Divestitures - Schedule of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Business Acquisition [Line Items]
Goodwill, beginning balance	$ 20,121
Acquisition	(28)
Divestitures	(9)
Goodwill, ending balance	20,084
Natural Gas Pipelines Regulated
Business Acquisition [Line Items]
Goodwill, beginning balance	14,249
Acquisition	0
Divestitures	0
Goodwill, ending balance	14,249
Natural Gas Pipelines Nonregulated
Business Acquisition [Line Items]
Goodwill, beginning balance	2,499
Acquisition	(28)
Divestitures	0
Goodwill, ending balance	2,471
CO2
Business Acquisition [Line Items]
Goodwill, beginning balance	928
Acquisition	0
Divestitures	(9)
Goodwill, ending balance	919
Products Pipelines, Pipelines
Business Acquisition [Line Items]
Goodwill, beginning balance	1,378
Acquisition	0
Divestitures	0
Goodwill, ending balance	1,378
Products Pipelines Terminals
Business Acquisition [Line Items]
Goodwill, beginning balance	151
Acquisition	0
Divestitures	0
Goodwill, ending balance	151
Terminals
Business Acquisition [Line Items]
Goodwill, beginning balance	802
Acquisition	0
Divestitures	0
Goodwill, ending balance	802
Energy Transition Ventures
Business Acquisition [Line Items]
Goodwill, beginning balance	114
Acquisition	0
Divestitures	0
Goodwill, ending balance	$ 114

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