Decommissioning Trust Funds (Fair Value Of Debt Securities By Contractual Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair value of debt securities by contractual maturities
1 year - 5 years	$ 490,000	$ 520,000
5 years - 10 years	481,000	461,000
10 years - 15 years	116,000	117,000
15 years - 20 years	156,000	161,000
20 years+	358,000	334,000
Total	1,707,000	1,655,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	106,000	62,000
Decommissioning Fund Investments	4,560,006	4,121,864
Entergy Arkansas [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	146,700	159,700
5 years - 10 years	194,700	191,700
10 years - 15 years	42,100	38,000
15 years - 20 years	42,100	42,600
20 years+	20,300	17,500
Total	484,800	470,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	38,900	21,200
Decommissioning Fund Investments	1,326,627	1,199,860
Entergy Louisiana [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	153,300	159,100
5 years - 10 years	170,000	161,700
10 years - 15 years	68,900	67,100
15 years - 20 years	77,200	83,300
20 years+	238,400	220,300
Total	753,400	725,100
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	45,600	33,600
Decommissioning Fund Investments	1,973,128	1,779,090
System Energy [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	190,100	201,700
5 years - 10 years	115,800	107,100
10 years - 15 years	4,800	11,700
15 years - 20 years	36,300	35,000
20 years+	101,100	97,400
Total	469,100	459,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	21,000	6,800
Decommissioning Fund Investments	$ 1,260,251	$ 1,142,914