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Income Taxes (Schedule Of Estimated Tax Attributes Carryovers And Their Expiration Dates) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]    
Capital losses, Carryover Amount $ 11,111 $ 21,291
Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 6,200,000  
Operating losses, Carryover Amount 21,100,000  
Federal [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 0  
Operating losses, Carryover Amount 4,500,000  
Tax credits, Carryover Amount 4,700  
Federal [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 1,700,000  
Operating losses, Carryover Amount 4,500,000  
Tax credits, Carryover Amount 12,300  
Federal [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 0  
Operating losses, Carryover Amount 2,100,000  
Tax credits, Carryover Amount 1,800  
Federal [Member] | Entergy New Orleans [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 900,000  
Operating losses, Carryover Amount $ 700,000  
Operating losses, Year(s) of expiration Dec. 31, 2037  
Tax credits, Carryover Amount $ 15,300  
Federal [Member] | Entergy Texas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 0  
Operating losses, Carryover Amount 2,600,000  
Tax credits, Carryover Amount 3,100  
Federal [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards, Pre January 1, 2018 0  
Operating losses, Carryover Amount 0  
Tax credits, Carryover Amount 1,500  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 7,400,000  
Operating Loss Carryforwards, No Expiration 16,700,000  
Deferred Tax Assets, Charitable Contribution Carryforwards 460,800  
State and Local Jurisdiction [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 4,800,000  
Tax credits, Carryover Amount 0  
State and Local Jurisdiction [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 7,200,000  
Tax credits, Carryover Amount 0  
State and Local Jurisdiction [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 2,300,000  
Tax credits, Carryover Amount 1,300  
State and Local Jurisdiction [Member] | Entergy New Orleans [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 1,700,000  
Tax credits, Carryover Amount 0  
State and Local Jurisdiction [Member] | Entergy Texas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount 0  
Tax credits, Carryover Amount $ 2,900  
Tax Credit Carryforward, Expiration Date Dec. 31, 2027  
State and Local Jurisdiction [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Carryover Amount $ 0  
Tax credits, Carryover Amount 9,000  
Other Federal And State [Member]    
Operating Loss Carryforwards [Line Items]    
Tax credits, Carryover Amount $ 73,100  
Minimum [Member] | Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2023  
Minimum [Member] | Federal [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2035  
Minimum [Member] | State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2022  
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2023  
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2038  
Tax Credit Carryforward, Expiration Date Dec. 31, 2022  
Minimum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2022  
Minimum [Member] | Other Federal And State [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2022  
Minimum [Member] | Other Federal And State [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2038  
Minimum [Member] | Other Federal And State [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2035  
Minimum [Member] | Other Federal And State [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2038  
Minimum [Member] | Other Federal And State [Member] | Entergy New Orleans [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2037  
Minimum [Member] | Other Federal And State [Member] | Entergy Texas [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2036  
Minimum [Member] | Other Federal And State [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2036  
Minimum [Member] | Other Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2022  
Maximum [Member] | Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2027  
Maximum [Member] | Federal [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2037  
Maximum [Member] | State and Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2041  
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2026  
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Operating losses, Year(s) of expiration Dec. 31, 2041  
Tax Credit Carryforward, Expiration Date Dec. 31, 2025  
Maximum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2025  
Maximum [Member] | Other Federal And State [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | Entergy Arkansas [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | Entergy Louisiana [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | Entergy Mississippi [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | Entergy New Orleans [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | Entergy Texas [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal And State [Member] | System Energy [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2041  
Maximum [Member] | Other Federal [Member]    
Operating Loss Carryforwards [Line Items]    
Tax Credit Carryforward, Expiration Date Dec. 31, 2026