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Rate And Regulatory Matters Rate and Regulatory Matters (Schedule of Regulatory Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Apr. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent $ 3,911,839 $ 3,609,463      
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 2,731,900 2,262,500      
Asset Retirement Obligation Costs [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 39,300 40,900      
Vidalia Purchased Power Agreement [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 54,500 67,400      
Other Regulatory Assets (Liabilities) [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 66,300 75,200      
Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 143,300 164,900      
Deferred Tax Equity Partnership Earnings [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 73,600 69,900      
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 132,500 163,300      
Refund from System Energy settlement with the APSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 0 8,200      
Securitization financing savings obligation [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 345,500 371,300      
Shorter-term financing interest earnings [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 0 48,900      
Customer rate credits from global stipulated settlement with the LPSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 48,700 121,700      
Refund from System Energy settlement with the LPSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 42,200 75,800      
Refund from System Energy settlement with the City Council [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 41,700 42,700      
Refund from System Energy settlement with the City Council 2 [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 29,200 32,000      
Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 15,300 0      
Refund from System Energy settlement with the City Council 3          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 18,700 22,000      
Non-service Pension and Othre Postretirement Plan Costs          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 84,700 0      
Entergy Louisiana [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 1,630,763 1,692,547      
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 961,900 798,400      
Entergy Louisiana [Member] | Asset Retirement Obligation Costs [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 39,300 40,900      
Entergy Louisiana [Member] | Vidalia Purchased Power Agreement [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 54,500 67,400      
Entergy Louisiana [Member] | Other Regulatory Assets (Liabilities) [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 23,700 6,400      
Entergy Louisiana [Member] | Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 75,100 111,600      
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 0 25,300     $ 38,000
Entergy Louisiana [Member] | Securitization financing savings obligation [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 345,500 371,300      
Entergy Louisiana [Member] | Shorter-term financing interest earnings [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 0 48,900      
Entergy Louisiana [Member] | Hurricane Ida insurance proceeds [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 0 26,000      
Entergy Louisiana [Member] | Customer rate credits from global stipulated settlement with the LPSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 48,700 121,700      
Entergy Louisiana [Member] | Refund from System Energy settlement with the LPSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 42,200 75,800      
Entergy Louisiana [Member] | Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 39,900 0      
Entergy Arkansas [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 1,044,060 831,165      
Entergy Arkansas [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 917,100 761,300      
Entergy Arkansas [Member] | Other Regulatory Assets (Liabilities) [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 500 1,400      
Entergy Arkansas [Member] | Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 39,000 27,900      
Entergy Arkansas [Member] | Deferred Tax Equity Partnership Earnings [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 35,400 32,400      
Entergy Arkansas [Member] | Refund from System Energy settlement with the APSC [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 0 8,200      
Entergy Arkansas [Member] | Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 52,100 0      
Entergy Mississippi [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 144,124 59,544      
Entergy Mississippi [Member] | Other Regulatory Assets (Liabilities) [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 900 2,400      
Entergy Mississippi [Member] | Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 14,200 12,200      
Entergy Mississippi [Member] | Deferred Tax Equity Partnership Earnings [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 38,200 37,500      
Entergy Mississippi [Member] | Other postretirement benefits [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 18,600 7,400      
Entergy Mississippi [Member] | Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 72,200 0      
Entergy New Orleans [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 312,962 260,312      
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 7,300 4,500      
Entergy New Orleans [Member] | Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 1,800 16,300      
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 132,500 138,000 $ 138,000 $ 138,000 $ 60,000
Entergy New Orleans [Member] | Sale-leaseback and depreciation refunds [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 4,600 5,200      
Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 41,700 42,700      
Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council 2 [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 29,200 32,000      
Entergy New Orleans [Member] | Other postretirement benefits [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 2,400        
Entergy New Orleans [Member] | Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 61,600 0      
Entergy New Orleans [Member] | Sale of Subsidiary Gain (Loss)          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 4,100 0      
Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council 3          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 18,700 22,000      
Entergy New Orleans [Member] | Non-service Pension and Othre Postretirement Plan Costs          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 11,500 0      
Entergy Texas [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 138,969 18,705      
Entergy Texas [Member] | Other Regulatory Assets (Liabilities) [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 800 300      
Entergy Texas [Member] | Retail rate rider over-recovery [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 13,000 12,200      
Entergy Texas [Member] | Retail refunds [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 6,200 6,200      
Entergy Texas [Member] | Production tax credits          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 45,800 0      
Entergy Texas [Member] | Non-service Pension and Othre Postretirement Plan Costs          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 73,200 0      
System Energy [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 897,301 747,190      
System Energy [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent 852,900 702,800      
System Energy [Member] | Entergy Arkansas’s Accumulated Accelerated Grand Gulf Amortization [Member]          
Regulatory Liability [Line Items]          
Regulatory Liability, Noncurrent $ 44,400 $ 44,400