Risk Management and Fair Values (Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Entergy Wholesale Commodities [Member]
Liabilities:
Cash collateral posted		$ 8.0
Other Deferred Debits And Other Assets [Member] \| Natural Gas Swaps [Member] \| Utility [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset		3.0
Derivative, Collateral, Obligation to Return Cash		$ 0.0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets, Noncurrent
Prepayments And Other [Member] \| Natural Gas Swaps [Member] \| Utility [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 2.0	$ 13.0
Derivative, Collateral, Obligation to Return Cash	$ 0.0	$ 0.0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Utility [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 44.0	$ 21.0
Derivative, Collateral, Obligation to Return Cash	$ (4.0)	$ (2.0)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Other Current Liabilities [Member] \| Natural Gas Swaps [Member] \| Utility [Member] \| Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative Liability, Fair Value, Gross Liability	$ 12.0	$ 25.0
Derivative, Collateral, Right to Reclaim Cash	$ 0.0	$ 0.0
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Entergy Louisiana [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy Louisiana [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy Louisiana [Member] \| Other Deferred Debits And Other Assets [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset		$ 3.4
Derivative, Collateral, Obligation to Return Cash		0.0
Entergy Louisiana [Member] \| Prepayments And Other [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 2.1	13.1
Derivative, Collateral, Obligation to Return Cash	0.0	0.0
Entergy Louisiana [Member] \| Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	16.9	7.7
Derivative, Collateral, Obligation to Return Cash	$ 0.2	(0.4)
Entergy Mississippi [Member]
Liabilities:
Letters of Credit Outstanding, Amount		$ 0.2
Entergy Mississippi [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Entergy Mississippi [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy Mississippi [Member] \| Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 2.0	$ 0.6
Derivative, Collateral, Obligation to Return Cash	0.8	0.0
Entergy Mississippi [Member] \| Other Current Liabilities [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative Liability, Fair Value, Gross Liability	12.6	24.0
Derivative, Collateral, Right to Reclaim Cash	$ 0.0	0.0
Entergy New Orleans [Member]
Liabilities:
Letters of Credit Outstanding, Amount		$ 0.2
Entergy New Orleans [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities, Current
Entergy New Orleans [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy New Orleans [Member] \| Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 1.6	$ 0.8
Derivative, Collateral, Obligation to Return Cash	0.1	0.0
Entergy New Orleans [Member] \| Other Current Liabilities [Member] \| Natural Gas Swaps [Member] \| Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative Liability, Fair Value, Gross Liability		1.5
Derivative, Collateral, Right to Reclaim Cash		$ 0.0
Entergy Arkansas [Member]
Liabilities:
Letters of Credit Outstanding, Amount	$ 5.9
Entergy Arkansas [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy Arkansas [Member] \| Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 19.8	$ 10.3
Derivative, Collateral, Obligation to Return Cash	$ (0.2)	0.0
Entergy Texas [Member]
Liabilities:
Letters of Credit Outstanding, Amount		$ 2.4
Entergy Texas [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Entergy Texas [Member] \| Prepayments And Other [Member] \| Fixed Transmission Rights (FTRs) [Member] \| Not Designated As Hedging Instrument [Member]
Assets:
Derivative Asset, Fair Value, Gross Asset	$ 3.5	$ 1.2
Derivative, Collateral, Obligation to Return Cash	$ (2.3)	$ 1.1

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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