Leases (Components Of Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Current Year, Operating Leases	$ 80,368
Year Two, Operating Leases	82,516
Year Three, Operating Leases	67,385
Year Four, Operating Leases	58,507
Year Five, Operating Leases	43,760
Years thereafter, Operating Leases	96,550
Minimum lease payments, Operating Leases	429,086
Current Year, Capital Leases	3,018
Year Two, Capital Leases	2,887
Year Three, Capital Leases	2,887
Year Four, Capital Leases	2,887
Year Five, Capital Leases	2,887
Years thereafter, Capital Leases	19,004
Minimum lease payments, Capital Leases	33,570
Less: Amount representing interest, Capital Leases	10,051
Present value of net minimum lease payments, Capital Leases	23,519
Entergy Arkansas [Member]
Current Year, Operating Leases	17,009
Year Two, Operating Leases	17,665
Year Three, Operating Leases	11,483
Year Four, Operating Leases	9,363
Year Five, Operating Leases	6,834
Years thereafter, Operating Leases	23,598
Minimum lease payments, Operating Leases	85,952
Entergy Louisiana [Member]
Current Year, Operating Leases	21,814
Year Two, Operating Leases	22,875
Year Three, Operating Leases	17,790
Year Four, Operating Leases	13,762
Year Five, Operating Leases	10,067
Years thereafter, Operating Leases	19,443
Minimum lease payments, Operating Leases	105,751
Entergy Mississippi [Member]
Current Year, Operating Leases	11,771
Year Two, Operating Leases	10,611
Year Three, Operating Leases	8,969
Year Four, Operating Leases	7,059
Year Five, Operating Leases	5,007
Years thereafter, Operating Leases	5,817
Minimum lease payments, Operating Leases	49,234
Entergy New Orleans [Member]
Current Year, Operating Leases	1,646
Year Two, Operating Leases	1,579
Year Three, Operating Leases	1,382
Year Four, Operating Leases	1,033
Year Five, Operating Leases	662
Years thereafter, Operating Leases	1,797
Minimum lease payments, Operating Leases	8,099
Entergy Texas [Member]
Current Year, Operating Leases	3,469
Year Two, Operating Leases	2,893
Year Three, Operating Leases	1,934
Year Four, Operating Leases	1,299
Year Five, Operating Leases	862
Years thereafter, Operating Leases	2,173
Minimum lease payments, Operating Leases	$ 12,630