Rate And Regulatory Matters Rate and Regulatory Matters (Schedule of Regulatory Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Apr. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	$ 3,609,463			$ 3,116,926
Regulatory Liability, Noncurrent and Noncurrent Liabilities Held For Sale [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	3,611,100
Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	2,262,500			1,826,200
Asset Retirement Obligation Costs [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	40,900			44,300
Vidalia Purchased Power Agreement [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	67,400			82,500
Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	75,200			108,000
Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	164,900			142,700
Deferred Tax Equity Partnership Earnings [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	69,900			57,900
Entergy Arkansas’s Accumulated Accelerated Grand Gulf Amortization [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	44,400			44,400
Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	163,300			98,000
Refund from System Energy settlement with the APSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	8,200			93,000
Securitization financing savings obligation [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	371,300			405,200
Complaints against System Energy [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	0			177,900
Shorter-term financing interest earnings [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	48,900			36,800
Customer rate credits from global stipulated settlement with the LPSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	121,700			0
Refund from System Energy settlement with the LPSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	75,800			0
Refund from System Energy settlement with the City Council [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	64,700			0
Refund from System Energy settlement with the City Council 2 [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	32,000			0
Entergy Louisiana [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	1,692,547			1,407,689
Entergy Louisiana [Member] | Regulatory Liability, Noncurrent and Noncurrent Liabilities Held For Sale [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	1,693,700
Entergy Louisiana [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	798,400			644,000
Entergy Louisiana [Member] | Asset Retirement Obligation Costs [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	40,900			44,300
Entergy Louisiana [Member] | Vidalia Purchased Power Agreement [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	67,400			82,500
Entergy Louisiana [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	21,700			24,100
Entergy Louisiana [Member] | Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	96,300			86,400
Entergy Louisiana [Member] | Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	25,300			38,000
Entergy Louisiana [Member] | Sale-leaseback and depreciation refunds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	0			14,100
Entergy Louisiana [Member] | Securitization financing savings obligation [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	371,300			405,200
Entergy Louisiana [Member] | Shorter-term financing interest earnings [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	48,900			36,800
Entergy Louisiana [Member] | Hurricane Ida insurance proceeds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	26,000			32,300
Entergy Louisiana [Member] | Customer rate credits from global stipulated settlement with the LPSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	121,700			0
Entergy Louisiana [Member] | Refund from System Energy settlement with the LPSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	75,800			0
Entergy Arkansas [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	831,165			759,181
Entergy Arkansas [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	761,300			621,600
Entergy Arkansas [Member] | Internal restructuring guaranteed customer credits [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	0			6,600
Entergy Arkansas [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	1,400			0
Entergy Arkansas [Member] | Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	27,900			10,600
Entergy Arkansas [Member] | Deferred Tax Equity Partnership Earnings [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	32,400			27,400
Entergy Arkansas [Member] | Refund from System Energy settlement with the APSC [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	8,200			93,000
Entergy Mississippi [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	59,544			33,696
Entergy Mississippi [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	2,400			800
Entergy Mississippi [Member] | Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	12,200			2,400
Entergy Mississippi [Member] | Deferred Tax Equity Partnership Earnings [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	37,500			30,500
Entergy Mississippi [Member] | Other postretirement benefits [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	7,400			0
Entergy New Orleans [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	260,312			90,434
Entergy New Orleans [Member] | Regulatory Liability, Noncurrent and Noncurrent Liabilities Held For Sale [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	260,700
Entergy New Orleans [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	4,500			500
Entergy New Orleans [Member] | Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	16,300			20,100
Entergy New Orleans [Member] | Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	138,000	$ 138,000	$ 138,000	60,000
Entergy New Orleans [Member] | Sale-leaseback and depreciation refunds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	5,200			9,800
Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	64,700			0
Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council 2 [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	32,000			0
Entergy New Orleans [Member] | Other postretirement benefits [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	1,000
Entergy Texas [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	18,705			43,013
Entergy Texas [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	300			2,700
Entergy Texas [Member] | Retail rate rider over-recovery [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	12,200			23,800
Entergy Texas [Member] | Retail refunds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	6,200			6,200
Entergy Texas [Member] | 2022 Rate Case Settlement Relate Back [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	0			10,300
System Energy [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	747,190			782,912
System Energy [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	702,800			560,600
System Energy [Member] | Entergy Arkansas’s Accumulated Accelerated Grand Gulf Amortization [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	44,400			44,400
System Energy [Member] | Complaints against System Energy [Member]
Regulatory Liability [Line Items]
Regulatory Liability, Noncurrent	$ 0			$ 177,900