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v3.25.1

Commitment and Contingencies (Long-Term Purchase Commitment) (Details) | 3 Months Ended
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Mar. 31, 2025 unit
Power island equipment |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 15
Combustion turbine |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 2
Entergy Arkansas [Member] | Power island equipment |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 4
Entergy Arkansas [Member] | Combustion turbine |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 1
Entergy Louisiana [Member] | Power island equipment |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 9
Entergy Louisiana [Member] | Combustion turbine |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 0
Entergy Mississippi [Member] | Power island equipment |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 2
Entergy Mississippi [Member] | Combustion turbine |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 0
Entergy Texas [Member] | Power island equipment |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 0
Entergy Texas [Member] | Combustion turbine |
Long-Term Purchase Commitment [Line Items] |
Long-Term Purchase Commitment, Minimum Quantity Required | 1

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=etr_PowerIslandEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | dei_LegalEntityAxis=etr_EntergyArkansasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=etr_EntergyLouisianaMember
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=etr_EntergyMississippiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=etr_EntergyTexasMember
Namespace Prefix: |
Data Type: | na
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Period Type: |