Risk Management and Fair Values (Schedule of Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 3.0		$ 3.0		$ 2.0
Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power
Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current		Other Liabilities, Current		Other Liabilities, Current
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used
Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	$ 2.0		$ 2.0		$ 11.0
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	0.0		0.0		0.0
Entergy Arkansas [Member] | Uncommitted Credit Facility of $25 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	12.4		12.4
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount					1.2
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member] | Uncommitted Credit Facility of $25 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 1.0		$ 1.0
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power
Entergy Louisiana [Member] | Uncommitted Credit Facility of $125 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 20.7		$ 20.7
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount					$ 0.5
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member] | Uncommitted Credit Facility of $125 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 0.7		$ 0.7
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power
Entergy Louisiana [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]					Other Liabilities, Current
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Utilities Operating Expense, Fuel Used		Utilities Operating Expense, Fuel Used
Entergy Louisiana [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, before Offset					$ 0.4
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset					0.0
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 41.1		$ 41.1
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount					$ 0.3
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member] | Uncommitted Credit Facility of $65 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 0.6		$ 0.6
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power
Entergy Mississippi [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current		Other Liabilities, Current		Other Liabilities, Current
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used
Entergy Mississippi [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	$ 1.5		$ 1.5		$ 10.1
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	$ 0.0		$ 0.0		$ 0.0
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power
Entergy New Orleans [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]					Other Liabilities, Current
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used
Entergy New Orleans [Member] | Natural Gas Swaps and Options [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, before Offset					$ 0.6
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset					0.0
Entergy Texas [Member] | Uncommitted Credit Facility of $80 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 79.7		$ 79.7
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount					$ 0.1
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member] | Uncommitted Credit Facility of $80 Million [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Letters of Credit Outstanding, Amount	$ 0.4		$ 0.4
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member] | Not Designated as Hedging Instrument [Member]
Effect Of Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power	Utilities Operating Expense, Purchased Power