Long - Term Debt (Schedule Of Maturities Of Long-term Debt) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Year One	$ 795,000
Year Two	1,358,159
Year Three	1,104,289
Year Four	1,865,154
Year Five	1,175,000
Entergy Arkansas [Member]
Year One	0
Year Two	507,359
Year Three	0
Year Four	290,000
Year Five	375,000
Entergy Louisiana [Member]
Year One	320,000
Year Two	360,200
Year Three	200,000
Year Four	379,185
Year Five	700,000
Entergy Mississippi [Member]
Year One	0
Year Two	0
Year Three	0
Year Four	250,000
Year Five	100,000
Entergy New Orleans [Member]
Year One	25,000
Year Two	20,000
Year Three	70,000
Year Four	100,000
Year Five	0
Entergy Texas [Member]
Year One	0
Year Two	200,000
Year Three	50,289
Year Four	155,969
Year Five	0
System Energy [Member]
Year One	0
Year Two	131,600
Year Three	134,000
Year Four	250,000
Year Five	$ 0