Risk Management and Fair Values Reconciliation Of Changes In The Net Assets (Liabilities) For The Fair Value Of Derivatives Classified As Level 3 In The Fair Value Hierarchy (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	$ 0.0	$ 0.0	$ 0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	84.0	175.0	162.0
Issuances of financial transmission rights	42.0	16.0	12.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0.0	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(124.0)	(176.0)	(179.0)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	21.0	19.0	4.0	$ 9.0
Electricity Futures Forwards Swaps And Options [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)			2.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset			0.0
Issuances of financial transmission rights			0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings			(2.0)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements			(38.0)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			0.0	$ 38.0
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	0.9	109.1
Issuances of financial transmission rights	20.6	5.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(25.8)	(106.5)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	6.0	10.3	2.3
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	44.8	49.9
Issuances of financial transmission rights	18.1	5.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(60.4)	(48.5)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	9.8	7.3	0.6
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	13.2	9.9
Issuances of financial transmission rights	1.3	0.8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(13.7)	(10.4)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1.4	0.6	0.3
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	5.3	3.6
Issuances of financial transmission rights	1.4	0.8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(6.4)	(3.7)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1.1	0.8	0.1
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset And Liability, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset	19.4	1.7
Issuances of financial transmission rights	0.2	3.9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(17.3)	(6.3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 2.4	$ 0.1	$ 0.8