Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Schedule of nuclear fuel company VIE notes payable) (Details) - USD ($) $ in Millions	Jul. 31, 2026	Jun. 30, 2026
VIE Notes Payable, 5.54% Series O due May 2029 [Member] \| Entergy Arkansas VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		5.54%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 1.84% Series N due July 2026 [Member] \| Entergy Arkansas VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		1.84%
Notes Payable, Noncurrent		$ 90
VIE Notes Payable, 2.51% Series V Due June 2027 [Member] \| Entergy Louisiana River Bend VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		2.51%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 5.94% Series J due September 2026 [Member] \| Entergy Louisiana Waterford VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		5.94%
Notes Payable, Noncurrent		$ 70
VIE Notes Payable, 2.05% Series K due September 2027 [Member] \| System Energy VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		2.05%
Notes Payable, Noncurrent		$ 90
VIE Notes Payable, 5.28% Series L due January 2029 [Member] \| System Energy VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		5.28%
Notes Payable, Noncurrent		$ 80
Subsequent Event [Member] \| VIE Notes Payable, 1.84% Series N due July 2026 [Member] \| Entergy Arkansas VIE [Member]
Notes Payable, Noncurrent [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	1.84%