This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481664/323-10-45-1

Name:	us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Gains and Losses on Divestitures, Impairments and Other Write-downs - Long Lived Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Impairments of long-lived assets			$ 1,634
Double Eagle Pipeline LLC
Property, Plant and Equipment [Line Items]
Impairments of equity investments	$ 67
Products Pipelines \| Double Eagle Pipeline LLC
Property, Plant and Equipment [Line Items]
Impairments of equity investments	67	$ 0	0
Natural Gas Pipelines
Property, Plant and Equipment [Line Items]
Impairments of long-lived assets	$ 0	$ 0	$ 1,600
Natural Gas Pipelines \| Valuation Technique, Discounted Cash Flow
Property, Plant and Equipment [Line Items]
Estimated weighted average cost of capital			8.50%