Asset Retirement Obligations - EGTS - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 6,644	$ 7,070
EGTS
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	523	518
Cost of removal \| EGTS
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 28	$ 24

The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant