The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 35
-Paragraph 8
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Decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations. Decommission fund investment for the process whereby a power station, at the end of its economic life, is taken permanently out of service and its site made available for other purposes. In the case of a nuclear station this comprises three different states of clearance. Immediately after the final closure, radioactive material such as nuclear fuel and operational waste is removed and the buildings surrounding the reactor shield are dismantled and finally the reactor itself is dismantled.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
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Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Decommissioning Fund Investments		$ 4,121,864	$ 5,514,016
Asset Retirement Obligation		4,271,500	4,757,100	$ 6,469,500
Change in Cash Flow Estimate		(500)
Entergy Louisiana [Member]
Decommissioning Fund Investments		1,779,090	2,114,523
Asset Retirement Obligation		1,736,800	1,653,200	1,573,300
Change in Cash Flow Estimate		2,800
Entergy Louisiana [Member] \| Big Cajun II
Change in Cash Flow Estimate	$ 2,800
System Energy [Member]
Decommissioning Fund Investments		1,142,914	1,385,254
Asset Retirement Obligation		1,042,500	1,007,600	968,900
Change in Cash Flow Estimate		(5,400)
System Energy [Member] \| Grand Gulf [Member]
Change in Cash Flow Estimate	5,400
Entergy Arkansas [Member]
Decommissioning Fund Investments		1,199,860	1,438,416
Asset Retirement Obligation		1,472,700	1,390,400	1,314,200
Change in Cash Flow Estimate		0
Entergy Mississippi [Member]
Asset Retirement Obligation		7,800	10,300	9,800
Change in Cash Flow Estimate		0
Entergy Texas [Member]
Asset Retirement Obligation		11,100	$ 8,500	$ 8,100
Change in Cash Flow Estimate		$ 2,100
Entergy Texas [Member] \| Big Cajun II
Change in Cash Flow Estimate	$ 2,100