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Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Schedule of uncommitted standby letter of credit facilities) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Financial transmission rights    
Letters of Credit Outstanding, Amount $ 6.0 $ 2.0
Entergy Arkansas [Member] | Financial transmission rights    
Letters of Credit Outstanding, Amount 3.5 0.5
Entergy Mississippi [Member] | Financial transmission rights    
Letters of Credit Outstanding, Amount 0.6 0.8
Entergy Louisiana [Member] | Financial transmission rights    
Letters of Credit Outstanding, Amount 1.2 0.1
Entergy New Orleans [Member] | Financial transmission rights    
Letters of Credit Outstanding, Amount   0.1
Entergy Texas [Member] | Financial transmission rights    
Letters of Credit Outstanding, Amount 0.6 $ 0.3
Credit Facility of $25 Million [Member] | Entergy Arkansas [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 25.0  
Letters of Credit Outstanding, Amount 0.0  
Credit Facility of $25 Million [Member] | Entergy New Orleans [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 25.0  
Letters of Credit Outstanding, Amount 0.0  
Uncommitted Credit Facility of $25 Million [Member] | Entergy Arkansas [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 25.0  
Line of Credit Facility, Commitment Fee Percentage 0.78%  
Letters of Credit Outstanding, Amount $ 23.6  
Uncommitted Credit Facility of $25 Million [Member] | Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 3.5  
Uncommitted Credit Facility of $125 Million [Member] | Entergy Louisiana [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 125.0  
Line of Credit Facility, Commitment Fee Percentage 0.78%  
Letters of Credit Outstanding, Amount $ 74.3  
Uncommitted Credit Facility of $125 Million [Member] | Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 1.2  
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [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 $ 47.3  
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [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 $ 0.0  
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount 0.6  
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | MISO [Member]    
Letters of Credit Outstanding, Amount 46.0  
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Non-MISO [Member]    
Letters of Credit Outstanding, Amount 1.3  
Uncommitted Credit Facility of $75 Million | Entergy Arkansas [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 75.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%  
Letters of Credit Outstanding, Amount $ 0.0  
Uncommitted Credit Facility of $45 Million | Entergy Louisiana [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 45.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%  
Letters of Credit Outstanding, Amount $ 0.0  
Uncommitted Credit Facility of $1 Million | Entergy New Orleans [Member]    
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  
Uncommitted Credit Facility of $150 Million | Entergy Texas [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 150.0  
Line of Credit Facility, Commitment Fee Percentage 1.25%  
Letters of Credit Outstanding, Amount $ 54.0  
Uncommitted Credit Facility of $150 Million | Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]    
Letters of Credit Outstanding, Amount $ 0.6  
Minimum [Member] | Entergy Arkansas [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.075%  
Minimum [Member] | Entergy Mississippi [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.075%  
Minimum [Member] | Entergy Louisiana [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.075%  
Minimum [Member] | Entergy New Orleans [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.075%  
Minimum [Member] | Entergy Texas [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.075%  
Maximum [Member] | Entergy Arkansas [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.375%  
Maximum [Member] | Entergy Mississippi [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.375%  
Maximum [Member] | Entergy Louisiana [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.375%  
Maximum [Member] | Entergy New Orleans [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.375%  
Maximum [Member] | Entergy Texas [Member]    
Line of Credit Facility, Commitment Fee Percentage 0.375%