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Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Book Value And The Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Long-term Debt, Fair Value | $ 23,227,270 | $ 27,061,171
Long-term Debt, Book Value | 25,452,926 | 25,880,901
Entergy Arkansas [Member] |  |
Long-term Debt, Fair Value | 3,805,958 | 4,176,577
Long-term Debt, Book Value | 4,175,929 | 3,958,862
Entergy Louisiana [Member] |  |
Long-term Debt, Fair Value | 9,626,860 | 11,492,650
Long-term Debt, Book Value | 10,369,840 | 10,914,346
Entergy Mississippi [Member] |  |
Long-term Debt, Fair Value | 2,134,560 | 2,346,230
Long-term Debt, Book Value | 2,430,499 | 2,179,989
Entergy New Orleans [Member] |  |
Long-term Debt, Fair Value | 743,715 | 765,538
Long-term Debt, Book Value | 782,815 | 788,165
Entergy Texas [Member] |  |
Long-term Debt, Fair Value | 2,360,498 | 2,483,995
Long-term Debt, Book Value | 2,612,874 | 2,354,148
System Energy [Member] |  |
Long-term Debt, Fair Value | 743,102 | 743,040
Long-term Debt, Book Value | $ 798,615 | $ 741,296

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- Definition Long-term Debt, Book Value + References No definition available. + Details
Name: | etr_LongTermDebtBookValue
Namespace Prefix: | etr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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
Namespace Prefix: |
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_EntergyNewOrleansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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