Asset Retirement Obligations (Narrative) (Details)	3 Months Ended
Sep. 30, 2022 USD ($)
Entergy Texas [Member] \| Big Cajun II [Member]
Asset Retirement Obligation, Revision of Estimate	$ 2,100,000
Entergy Louisiana [Member] \| Big Cajun II [Member]
Asset Retirement Obligation, Revision of Estimate	2,800,000
System Energy [Member] \| Grand Gulf [Member]
Asset Retirement Obligation, Revision of Estimate	$ (5,400,000)

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 35
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6392603&loc=d3e7123-110846

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

Name:	us-gaap_AssetRetirementObligationRevisionOfEstimate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration