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Revolving Credit Facilities, Lines Of Credit, and Short-Term Borrowings (Schedule of nuclear fuel company VIE notes payable) (Details) - USD ($) $ in Millions	Jan. 31, 2026	Dec. 31, 2025
Entergy Arkansas [Member] | VIE Notes Payable, 5.54% Series O due May 2029
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.54%
VIE Notes Payable, 2.51% Series V due June 2027 [Member] | Entergy Louisiana River Bend VIE [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.51%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 1.84% Series N due July 2026 [Member] | Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.84%
Notes Payable, Noncurrent		$ 90
VIE Notes Payable, 2.05% Series K due September 2027 [Member] | System Energy VIE [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.05%
Notes Payable, Noncurrent		$ 90
VIE Notes Payable, 5.94% Series J due September 2026 [Member] | Entergy Louisiana Waterford VIE [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.94%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 5.54% Series O due May 2029 | Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.54%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 5.28% Series L due January 2029 | System Energy VIE [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.28%
Notes Payable, Noncurrent	$ 80

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