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Revolving Credit Facilities, Lines Of Credit, and Short-Term Borrowings (Schedule of uncommitted standby letter of credit facilities) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount $ 2.0 $ 2.0
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.1 0.5
Entergy Arkansas [Member] | Uncommitted Credit Facility of $25 Million [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 25.0  
Line of Credit Facility, Commitment Fee Percentage 0.78%  
Letters of Credit Outstanding, Amount $ 18.3  
Entergy Arkansas [Member] | Uncommitted Credit Facility of $25 Million [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.1  
Entergy Arkansas [Member] | Uncommitted Credit Facility of $75 Million    
Line of Credit Facility, Maximum Borrowing Capacity $ 75.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%  
Letters of Credit Outstanding, Amount $ 75.0  
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.8 0.1
Entergy Louisiana [Member] | Uncommitted Credit Facility of $125 Million [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 125.0  
Line of Credit Facility, Commitment Fee Percentage 0.78%  
Letters of Credit Outstanding, Amount $ 119.1  
Entergy Louisiana [Member] | Uncommitted Credit Facility of $125 Million [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.8  
Entergy Louisiana [Member] | Uncommitted Credit Facility of $45 Million    
Line of Credit Facility, Maximum Borrowing Capacity $ 45.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%  
Letters of Credit Outstanding, Amount $ 45.0  
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.8 0.8
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member] | Facility 1    
Line of Credit Facility, Maximum Borrowing Capacity $ 65.0  
Line of Credit Facility, Commitment Fee Percentage 0.78%  
Letters of Credit Outstanding, Amount $ 44.4  
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member] | Facility 2    
Line of Credit Facility, Maximum Borrowing Capacity $ 65.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%  
Letters of Credit Outstanding, Amount $ 43.0  
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member] | MISO [Member]    
Letters of Credit Outstanding, Amount 43.1  
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member] | Non-MISO [Member]    
Letters of Credit Outstanding, Amount 1.3  
Entergy Mississippi [Member] | Uncommitted Credit Facility of $65 Million [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.8  
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount   0.1
Entergy New Orleans [Member] | Uncommitted Credit Facility of $1 Million    
Line of Credit Facility, Maximum Borrowing Capacity $ 1.0  
Line of Credit Facility, Commitment Fee Percentage 1.625%  
Letters of Credit Outstanding, Amount $ 0.5  
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.1 $ 0.3
Entergy Texas [Member] | Uncommitted Credit Facility of $150 Million    
Line of Credit Facility, Maximum Borrowing Capacity $ 150.0  
Line of Credit Facility, Commitment Fee Percentage 1.25%  
Letters of Credit Outstanding, Amount $ 59.6  
Entergy Texas [Member] | Uncommitted Credit Facility of $150 Million | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.1  
Entergy Texas [Member] | Uncommitted Credit Facility of $160 Million    
Line of Credit Facility, Maximum Borrowing Capacity $ 160.0  
Line of Credit Facility, Commitment Fee Percentage 1.05%  
Letters of Credit Outstanding, Amount $ 0.0