REVOLVING CREDIT FACILITIES, LINES OF CREDIT, SHORT-TERM BORROWINGS, AND LONG-TERM DEBT (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) (Schedule of VIE Notes Payable) (Details) - USD ($) $ in Millions	Sep. 30, 2026	Jul. 31, 2026
5.54% Series O due May 2029 | Entergy Arkansas VIE
Debt Instrument [Line Items]
Stated interest rate	5.54%
Long-term payable due to associated company	$ 70
5.28% Series P due July 2031 | Entergy Arkansas VIE
Debt Instrument [Line Items]
Stated interest rate	5.28%	5.28%
Long-term payable due to associated company	$ 120
2.51% Series V due June 2027 | Entergy Louisiana River Bend VIE
Debt Instrument [Line Items]
Stated interest rate	2.51%
Long-term payable due to associated company	$ 70
5.28% Series K due September 2031 | Entergy Louisiana Waterford VIE
Debt Instrument [Line Items]
Stated interest rate	5.28%
Long-term payable due to associated company	$ 90
2.05% Series K due September 2027 | System Energy VIE
Debt Instrument [Line Items]
Stated interest rate	2.05%
Long-term payable due to associated company	$ 90
5.28% Series L due January 2029 | System Energy VIE
Debt Instrument [Line Items]
Stated interest rate	5.28%
Long-term payable due to associated company	$ 80