Risk Management and Fair Values (Derivatives Not Designated as Hedging Instruments) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 164.0	$ 124.0	$ 176.0
Natural Gas Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
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
Derivative, Gain (Loss) on Derivative, Net	$ (8.0)	$ (54.0)	$ 74.0
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 71.7	$ 60.4	$ 48.5
Entergy Louisiana [Member] | Natural Gas Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Utilities Operating Expense, Fuel Used	Utilities Operating Expense, Fuel Used
Derivative, Gain (Loss) on Derivative, Net		$ (8.4)	$ 21.4
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 7.5	$ 13.7	$ 10.4
Entergy Mississippi [Member] | Natural Gas Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
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
Derivative, Gain (Loss) on Derivative, Net	$ 7.0	$ (42.9)	$ 53.6
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 6.9	$ 6.4	$ 3.7
Entergy New Orleans [Member] | Natural Gas Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
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
Derivative, Gain (Loss) on Derivative, Net	$ 0.5	$ (3.0)	$ (1.2)
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 59.8	$ 25.8	$ 106.5
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Derivative Instruments, Gain (Loss) [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
Derivative, Gain (Loss) on Derivative, Net	$ 17.8	$ 17.3	$ 6.3