Decommissioning Trust Funds (Fair Value Of Debt Securities By Contractual Maturities) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair value of debt securities by contractual maturities
1 year - 5 years	$ 516,000	$ 520,000
5 years - 10 years	496,000	461,000
10 years - 15 years	111,000	117,000
15 years - 20 years	161,000	161,000
20 years+	353,000	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	70,000	62,000
Decommissioning Fund Investments	4,349,892	4,121,864
Entergy Arkansas [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	153,600	159,700
5 years - 10 years	194,200	191,700
10 years - 15 years	41,600	38,000
15 years - 20 years	43,000	42,600
20 years+	18,300	17,500
Total	479,400	470,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	28,700	21,200
Decommissioning Fund Investments	1,265,519	1,199,860
Entergy Louisiana [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	168,400	159,100
5 years - 10 years	176,400	161,700
10 years - 15 years	62,800	67,100
15 years - 20 years	80,000	83,300
20 years+	234,300	220,300
Total	759,000	725,100
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	37,100	33,600
Decommissioning Fund Investments	1,879,612	1,779,090
System Energy [Member]
Fair value of debt securities by contractual maturities
1 year - 5 years	193,900	201,700
5 years - 10 years	125,200	107,100
10 years - 15 years	6,800	11,700
15 years - 20 years	38,100	35,000
20 years+	100,300	97,400
Total	468,100	459,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	3,800	6,800
Decommissioning Fund Investments	$ 1,204,762	$ 1,142,914