Decommissioning Trust Funds (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jun. 28, 2022
Decommissioning Trust Funds [Abstract]
Deferred taxes on unrealized gains/(losses) recorded in OCI for non-regulated decommissioning trusts	$ 0	$ 7,221,000
Amortized cost of debt securities	$ 1,858,000,000		$ 1,852,000,000
Average coupon rate of debt securities	3.07%
Average duration of debt securities, years	6 years 5 months 12 days
Average maturity of debt securities, years	10 years 9 months 21 days
Proceeds from the dispositions of debt securities	$ 124,000,000	303,000,000
Equity Securities, FV-NI, Unrealized Loss	161,000,000
Debt Securities, Available-for-sale, Realized Gain	0	1,000,000
Debt Securities, Available-for-sale, Realized Loss	9,000,000	12,000,000
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale		1,500,000
Entergy Arkansas [Member]
Decommissioning Trust Funds [Abstract]
Amortized cost of debt securities	$ 535,400,000		539,800,000
Average coupon rate of debt securities	2.38%
Average duration of debt securities, years	6 years 14 days
Average maturity of debt securities, years	7 years 6 months 3 days
Proceeds from the dispositions of debt securities	$ 15,700,000	7,200,000
Equity Securities, FV-NI, Unrealized Loss	47,300,000
Debt Securities, Available-for-sale, Realized Gain	0	30,000.00
Debt Securities, Available-for-sale, Realized Loss	1,600,000	200,000
Entergy Louisiana [Member]
Decommissioning Trust Funds [Abstract]
Amortized cost of debt securities	$ 804,100,000		789,100,000
Average coupon rate of debt securities	3.72%
Average duration of debt securities, years	6 years 7 months 20 days
Average maturity of debt securities, years	13 years 1 month 13 days
Proceeds from the dispositions of debt securities	$ 67,400,000	120,500,000
Percentage Interest in River Bend	30.00%
Equity Securities, FV-NI, Unrealized Loss	$ 69,400,000
Debt Securities, Available-for-sale, Realized Gain	400,000	900,000
Debt Securities, Available-for-sale, Realized Loss	4,900,000	5,500,000
System Energy [Member]
Decommissioning Trust Funds [Abstract]
Amortized cost of debt securities	$ 518,600,000		$ 522,700,000
Average coupon rate of debt securities	2.74%
Average duration of debt securities, years	6 years 6 months 21 days
Average maturity of debt securities, years	10 years 6 months 3 days
Proceeds from the dispositions of debt securities	$ 41,300,000	36,200,000
Equity Securities, FV-NI, Unrealized Loss	44,500,000
Debt Securities, Available-for-sale, Realized Gain	0	100,000
Debt Securities, Available-for-sale, Realized Loss	$ 2,300,000	$ 700,000
Palisades [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value				$ 552,000,000