Long - Term Debt (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended				12 Months Ended
	Jan. 31, 2022	May 31, 2015	Sep. 30, 2009	Apr. 30, 2007	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Apr. 30, 2022	Jul. 31, 2015	Sep. 30, 2011	Nov. 30, 2009	Jun. 30, 2007	Dec. 31, 1988
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One							$ 2,100,275
Long-Term Debt, Maturity, Year Two							1,546,940
Long-Term Debt, Maturity, Year Three							2,375,720
Long-Term Debt, Maturity, Year Four							916,965
Long-Term Debt, Maturity, Year Five							2,195,627
System Energy [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One							0
Long-Term Debt, Maturity, Year Two							221,500
Long-Term Debt, Maturity, Year Three							0
Long-Term Debt, Maturity, Year Four							90,000
Long-Term Debt, Maturity, Year Five							325,000
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One							375,000
Long-Term Debt, Maturity, Year Two							70,200
Long-Term Debt, Maturity, Year Three							690,000
Long-Term Debt, Maturity, Year Four							0
Long-Term Debt, Maturity, Year Five							350,000
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One							1,400,000
Long-Term Debt, Maturity, Year Two							376,100
Long-Term Debt, Maturity, Year Three							720,000
Long-Term Debt, Maturity, Year Four							520,000
Long-Term Debt, Maturity, Year Five							425,000
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Up front financing costs associated with securitization		$ 3,000
Amount of Hurricane Issac storm cost to be recovered through securitization		31,800
Replenishment amount for storm reserve spending		$ 63,900
Long-Term Debt, Maturity, Year One							86,275
Long-Term Debt, Maturity, Year Two							79,140
Long-Term Debt, Maturity, Year Three							85,720
Long-Term Debt, Maturity, Year Four							6,965
Long-Term Debt, Maturity, Year Five							719
Entergy Texas [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One							0
Long-Term Debt, Maturity, Year Two							0
Long-Term Debt, Maturity, Year Three							130,000
Long-Term Debt, Maturity, Year Four							150,000
Long-Term Debt, Maturity, Year Five							$ 69,908
Hurricane Ike And Hurricane Gustav [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of securitization bonds authorized to be issued for restoration costs			$ 566,400
Debt Instrument, Face Amount											$ 545,900
Repayments of Debt					$ 54,300
Hurricanes Laura and Delta and Winter Storm Uri [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of securitization bonds authorized to be issued for restoration costs	$ 242,900
Hurricane Harvey [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Regulatory Asset	$ 13,300
Hurricane Rita [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of securitization bonds authorized to be issued for restoration costs				$ 353,000
Debt Instrument, Face Amount												$ 329,500
Amount of securitization bonds authorized to be issued for transaction costs				6,000
Deferred Income Tax Expense (Benefit)				$ 32,000
Repayments of Debt						$ 17,500
Mortgage Bonds 4.0% Series Due March 2029 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							4.00%
Long-Term Debt, Gross					300,000		$ 300,000
Debt Instrument, Interest Rate, Stated Percentage							4.00%
Mortgage Bonds 4.5% Series Due March 2039 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							4.50%
Long-Term Debt, Gross					400,000		$ 400,000
Debt Instrument, Interest Rate, Stated Percentage							4.50%
Tranche A One Two Point Six Seven Percent Due June Two Thousand Twenty Seven [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									2.67%
Debt Instrument, Interest Rate, Stated Percentage									2.67%
Debt Instrument, Face Amount									$ 98,700
Long-Term Debt, Maturity, Year One							$ 6,200
Securitization Bonds 3.051% Series Senior Secured Due December 2028 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							3.051%	3.051%
Long-Term Debt, Gross					87,743		$ 69,908
Debt Instrument, Interest Rate, Stated Percentage							3.051%	3.051%
Debt Instrument, Face Amount								$ 100,000
Long-Term Debt, Maturity, Year One							$ 18,300
Long-Term Debt, Maturity, Year Two							18,800
Long-Term Debt, Maturity, Year Three							19,400
Long-Term Debt, Maturity, Year Four							$ 13,400
Securitization Bonds 3.697% Series Senior Secured Due December 2036 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							3.697%	3.697%
Long-Term Debt, Gross					$ 190,850		$ 190,850
Debt Instrument, Interest Rate, Stated Percentage							3.697%	3.697%
Debt Instrument, Face Amount								$ 190,850
Long-Term Debt, Maturity, Year Four							$ 6,600
Long-Term Debt, Maturity, Year Five							20,500
Securitization Bonds, 2.04% Series Senior Secured, Due September 2023 [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage										2.04%
Debt Instrument, Interest Rate, Stated Percentage										2.04%
Debt Instrument, Face Amount										$ 207,200
Repayments of Debt						$ 11,000
Aggregate Senior secured restoration bonds (securitization bonds) [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount								$ 290,850
Grand Gulf [Member] | System Energy [Member]
Debt Instrument [Line Items]
Sale Leaseback Transaction, Net Book Value													$ 500,000
Long-Term Debt, Maturity, Year One							17,188
Long-Term Debt, Maturity, Year Two							17,188
Long-Term Debt, Maturity, Year Three							17,188
Long-Term Debt, Maturity, Year Four							17,188
Long-Term Debt, Maturity, Year Five							$ 17,188