Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)
Commercial Paper Program [Member]
Commercial Paper program limit	$ 2,000
Commercial Paper	$ 1,201
Debt, weighted average interest rate	0.28%
Entergy Louisiana Waterford VIE [Member]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Entergy Louisiana River Bend VIE [Member]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
System Energy VIE [Member]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Entergy Arkansas VIE [Member]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Credit Facility Of One Hundred And Fifty Million [Member] \| Entergy Texas [Member]
Amount of total borrowing capacity against which fronting commitments exist	$ 30
Line of credit facility, maximum borrowing capacity	150
Amount Drawn/ Outstanding	0
Credit Facility Of One Hundred And Fifty Million [Member] \| Entergy Arkansas [Member]
Amount of total borrowing capacity against which fronting commitments exist	5
Line of credit facility, maximum borrowing capacity	150
Amount Drawn/ Outstanding	0
Credit Facility Of Three Hundred and Fifty Million [Member] \| Entergy Louisiana [Member]
Amount of total borrowing capacity against which fronting commitments exist	15
Line of credit facility, maximum borrowing capacity	350
Amount Drawn/ Outstanding	125
Credit Facility Of Twenty Five Million [Member] \| Entergy Arkansas [Member]
Line of credit facility, maximum borrowing capacity	25
Amount Drawn/ Outstanding	0
Credit Facility Of Twenty Five Million [Member] \| Entergy New Orleans [Member]
Amount of total borrowing capacity against which fronting commitments exist	10
Line of credit facility, maximum borrowing capacity	25
Amount Drawn/ Outstanding	$ 0
Credit Facility of Three Point Five Billion
Line of credit facility, commitment fee percentage	0.225%
Amount of total borrowing capacity against which fronting commitments exist	$ 20
Line of credit facility, maximum borrowing capacity	3,500
Amount Drawn/ Outstanding	$ 165
Credit Facility of Three Point Five Billion \| Credit Facility [Member]
Debt, weighted average interest rate	1.60%
Credit Facility of One Hundred and Thirty Nine Million \| Entergy Nuclear Vermont Yankee [Member]
Line of credit facility, commitment fee percentage	0.20%
Line of credit facility, maximum borrowing capacity	$ 139
Debt, weighted average interest rate	1.67%
Amount Drawn/ Outstanding	$ 139
Minimum [Member] \| Entergy Louisiana [Member]
Line of credit facility, commitment fee percentage	0.075%
Minimum [Member] \| Entergy Texas [Member]
Line of credit facility, commitment fee percentage	0.075%
Minimum [Member] \| Entergy Arkansas [Member]
Line of credit facility, commitment fee percentage	0.075%
Minimum [Member] \| Entergy Mississippi [Member]
Line of credit facility, commitment fee percentage	0.075%
Minimum [Member] \| Entergy New Orleans [Member]
Line of credit facility, commitment fee percentage	0.075%
Maximum [Member] \| Entergy Louisiana [Member]
Line of credit facility, commitment fee percentage	0.375%
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Consolidated debt ratio of lessees total capitalization	70.00%
Maximum [Member] \| Entergy Texas [Member]
Line of credit facility, commitment fee percentage	0.375%
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Maximum [Member] \| System Energy [Member]
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Consolidated debt ratio of lessees total capitalization	70.00%
Maximum [Member] \| Entergy Arkansas [Member]
Line of credit facility, commitment fee percentage	0.375%
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Consolidated debt ratio of lessees total capitalization	70.00%
Maximum [Member] \| Entergy Mississippi [Member]
Line of credit facility, commitment fee percentage	0.375%
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Maximum [Member] \| Entergy New Orleans [Member]
Line of credit facility, commitment fee percentage	0.375%
Public Utilities, Approved Debt Capital Structure, Percentage	65.00%
Maximum [Member] \| Credit Facility of Three Point Five Billion
Consolidated debt ratio	65.00%

Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit

No definition available.

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- Definition

Commercial Paper program limit

+ References

No definition available.

+ Details

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- Definition

Consolidated debt ratio.

+ References

No definition available.

+ Details

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- Definition

Consolidated debt ratio of lessees total capitalization.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility commitment fee as a percentage of undrawn commitment amount

+ References

No definition available.

+ Details

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- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-SubTopic 210
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(19)(a)(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Percentage of public utility's approved debt to capital, including debt and equity.

+ References

No definition available.

+ Details

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