Long - Term Debt (Schedule Of Maturities Of Long-term Debt) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Year One	$ 1,164,000
Year Two	1,141,878
Year Three	2,452,194
Year Four	1,340,000
Year Five	1,378,000
Entergy Arkansas [Member]
Year One	485,000
Year Two	12,200
Year Three	290,000
Year Four	375,000
Year Five	0
Entergy Louisiana [Member]
Year One	240,000
Year Two	258,200
Year Three	1,455,980
Year Four	700,000
Year Five	300,000
Entergy Mississippi [Member]
Year One	0
Year Two	0
Year Three	250,000
Year Four	100,000
Year Five	0
Entergy New Orleans [Member]
Year One	1,618
Year Two	71,326
Year Three	101,306
Year Four	1,275
Year Five	79,140
Entergy Texas [Member]
Year One	200,000
Year Two	17,478
Year Three	106,214
Year Four	0
Year Five	0
System Energy [Member]
Year One	100,000
Year Two	134,000
Year Three	250,000
Year Four	0
Year Five	$ 200,000