Leases Lease, Maturity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 62,124
Finance Lease, Liability, Payments, Remainder of Fiscal Year	14,014
Lessee, Operating Lease, Liability, Payments, Due Year Two	56,386
Finance Lease, Liability, Payments, Due Year Two	12,457
Lessee, Operating Lease, Liability, Payments, Due Year Three	47,919
Finance Lease, Liability, Payments, Due Year Three	11,253
Lessee, Operating Lease, Liability, Payments, Due Year Four	37,228
Finance Lease, Liability, Payments, Due Year Four	10,121
Lessee, Operating Lease, Liability, Payments, Due Year Five	30,376
Finance Lease, Liability, Payments, Due Year Five	8,454
Lessee, Operating Lease, Liability, Payments, Due after Year Five	29,138
Finance Lease, Liability, Payments, Due after Year Five	20,010
Lessee, Operating Lease, Liability, Payments, Due	263,171
Finance Lease, Liability, Payments, Due	76,309
Operating Lease, Cost	29,153
Finance Lease, Interest Payment on Liability	11,500
Present Value Net Minimum Operating Lease Payments	234,018
Present Value Net Minimum Financing Lease Payments	64,809
Entergy Louisiana [Member]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	11,376
Finance Lease, Liability, Payments, Remainder of Fiscal Year	4,422
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,645
Finance Lease, Liability, Payments, Due Year Two	3,766
Lessee, Operating Lease, Liability, Payments, Due Year Three	6,935
Finance Lease, Liability, Payments, Due Year Three	3,325
Lessee, Operating Lease, Liability, Payments, Due Year Four	4,916
Finance Lease, Liability, Payments, Due Year Four	2,856
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,089
Finance Lease, Liability, Payments, Due Year Five	2,092
Lessee, Operating Lease, Liability, Payments, Due after Year Five	2,972
Finance Lease, Liability, Payments, Due after Year Five	2,476
Lessee, Operating Lease, Liability, Payments, Due	38,933
Finance Lease, Liability, Payments, Due	18,937
Operating Lease, Cost	2,860
Finance Lease, Interest Payment on Liability	1,641
Present Value Net Minimum Operating Lease Payments	36,073
Present Value Net Minimum Financing Lease Payments	17,296
Entergy Mississippi [Member]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	6,112
Finance Lease, Liability, Payments, Remainder of Fiscal Year	1,692
Lessee, Operating Lease, Liability, Payments, Due Year Two	4,983
Finance Lease, Liability, Payments, Due Year Two	1,527
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,566
Finance Lease, Liability, Payments, Due Year Three	1,334
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,454
Finance Lease, Liability, Payments, Due Year Four	1,111
Lessee, Operating Lease, Liability, Payments, Due Year Five	731
Finance Lease, Liability, Payments, Due Year Five	838
Lessee, Operating Lease, Liability, Payments, Due after Year Five	1,972
Finance Lease, Liability, Payments, Due after Year Five	1,038
Lessee, Operating Lease, Liability, Payments, Due	18,818
Finance Lease, Liability, Payments, Due	7,540
Operating Lease, Cost	1,953
Finance Lease, Interest Payment on Liability	670
Present Value Net Minimum Operating Lease Payments	16,865
Present Value Net Minimum Financing Lease Payments	6,870
Entergy New Orleans [Member]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	1,248
Finance Lease, Liability, Payments, Remainder of Fiscal Year	744
Lessee, Operating Lease, Liability, Payments, Due Year Two	991
Finance Lease, Liability, Payments, Due Year Two	634
Lessee, Operating Lease, Liability, Payments, Due Year Three	711
Finance Lease, Liability, Payments, Due Year Three	581
Lessee, Operating Lease, Liability, Payments, Due Year Four	549
Finance Lease, Liability, Payments, Due Year Four	532
Lessee, Operating Lease, Liability, Payments, Due Year Five	310
Finance Lease, Liability, Payments, Due Year Five	449
Lessee, Operating Lease, Liability, Payments, Due after Year Five	522
Finance Lease, Liability, Payments, Due after Year Five	713
Lessee, Operating Lease, Liability, Payments, Due	4,331
Finance Lease, Liability, Payments, Due	3,653
Operating Lease, Cost	452
Finance Lease, Interest Payment on Liability	362
Present Value Net Minimum Operating Lease Payments	3,879
Present Value Net Minimum Financing Lease Payments	3,291
Entergy Texas [Member]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	4,339
Finance Lease, Liability, Payments, Remainder of Fiscal Year	1,382
Lessee, Operating Lease, Liability, Payments, Due Year Two	3,611
Finance Lease, Liability, Payments, Due Year Two	1,188
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,689
Finance Lease, Liability, Payments, Due Year Three	981
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,336
Finance Lease, Liability, Payments, Due Year Four	839
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,684
Finance Lease, Liability, Payments, Due Year Five	648
Lessee, Operating Lease, Liability, Payments, Due after Year Five	1,119
Finance Lease, Liability, Payments, Due after Year Five	706
Lessee, Operating Lease, Liability, Payments, Due	15,778
Finance Lease, Liability, Payments, Due	5,744
Operating Lease, Cost	1,716
Finance Lease, Interest Payment on Liability	512
Present Value Net Minimum Operating Lease Payments	14,062
Present Value Net Minimum Financing Lease Payments	5,232
Entergy Arkansas [Member]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	13,010
Finance Lease, Liability, Payments, Remainder of Fiscal Year	2,772
Lessee, Operating Lease, Liability, Payments, Due Year Two	11,165
Finance Lease, Liability, Payments, Due Year Two	2,369
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,788
Finance Lease, Liability, Payments, Due Year Three	2,079
Lessee, Operating Lease, Liability, Payments, Due Year Four	7,193
Finance Lease, Liability, Payments, Due Year Four	1,833
Lessee, Operating Lease, Liability, Payments, Due Year Five	5,866
Finance Lease, Liability, Payments, Due Year Five	1,489
Lessee, Operating Lease, Liability, Payments, Due after Year Five	12,021
Finance Lease, Liability, Payments, Due after Year Five	1,787
Lessee, Operating Lease, Liability, Payments, Due	58,043
Finance Lease, Liability, Payments, Due	12,329
Operating Lease, Cost	5,720
Finance Lease, Interest Payment on Liability	1,119
Present Value Net Minimum Operating Lease Payments	52,323
Present Value Net Minimum Financing Lease Payments	$ 11,210