Long - Term Debt (Narrative) (Details) - USD ($)	1 Months Ended							12 Months Ended
	Dec. 31, 2021	Nov. 30, 2020	Jul. 31, 2015	May 31, 2015	Jun. 30, 2010	Sep. 30, 2009	Apr. 30, 2007	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2011	Aug. 31, 2010	Nov. 30, 2009	Jun. 30, 2007
Debt Instrument [Line Items]
Year One	$ 1,040,631,000							$ 1,040,631,000
Year Two	2,460,563,000							2,460,563,000
Year Three	2,299,475,000							2,299,475,000
Year Four	1,379,140,000							1,379,140,000
Year Five	2,595,720,000							2,595,720,000
Bonds issued to recover cost	83,639,000							83,639,000	$ 174,635,000
Long-term debt								8,308,427,000	12,619,201,000	$ 9,304,396,000
System Energy [Member]
Debt Instrument [Line Items]
Year One	50,305,000							50,305,000
Year Two	250,000,000							250,000,000
Year Three	36,100,000							36,100,000
Year Four	200,000,000							200,000,000
Year Five	0							0
Long-term debt								662,423,000	1,147,903,000	1,103,917,000
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Carrying costs on issuance of bonds to recover storm damage restoration costs					$ 11,500,000
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs					$ 4,600,000
Year One	0							0
Year Two	290,000,000							290,000,000
Year Three	379,800,000							379,800,000
Year Four	0							0
Year Five	690,000,000							690,000,000
Long-term debt								719,284,000	1,071,121,000	834,038,000
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Year One	200,000,000							200,000,000
Year Two	1,445,000,000							1,445,000,000
Year Three	1,782,300,000							1,782,300,000
Year Four	300,000,000							300,000,000
Year Five	775,000,000							775,000,000
Bonds issued to recover cost	0							0	10,278,000
Long-term debt	1,200,000,000							3,769,166,000	3,675,083,000	2,691,133,000
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs				$ 3,000,000
Year One	1,326,000							1,326,000
Year Two	171,306,000							171,306,000
Year Three	1,275,000							1,275,000
Year Four	79,140,000							79,140,000
Year Five	85,720,000							85,720,000
Amount of Hurricane Issac storm cost to be recovered through securitization				31,800,000
Replenishment amount for storm reserve spending				$ 63,900,000
Long-term debt								183,403,000	138,925,000	113,876,000
Entergy Texas [Member]
Debt Instrument [Line Items]
Year One	0							0
Year Two	54,257,000							54,257,000
Year Three	0							0
Year Four	0							0
Year Five	130,000,000							130,000,000
Bonds issued to recover cost	53,979,000							53,979,000	123,066,000
Long-term debt								127,931,000	937,725,000	$ 986,019,000
Hurricane Rita [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Cost recovered through issuance of securitization bonds							$ 353,000,000
Amount of storm cost recovery bonds for transaction costs							6,000,000
Deferred income tax benefits							$ 32,000,000
Bonds issued to recover cost																	$ 329,500,000
Hurricane Rita [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Year Two	$ 17,500,000							$ 17,500,000
Hurricane Ike And Hurricane Gustav [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Cost recovered through issuance of securitization bonds						$ 566,400,000
Bonds issued to recover cost																$ 545,900,000
Securitization Bonds, 5.93% Series Senior Secured, Series A, Due June 2022 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.93%							5.93%
Long-term Debt, Gross	$ 0							$ 0	17,478,000
Debt Instrument, Interest Rate, Stated Percentage	5.93%							5.93%
4.0% Series First Mortgage Bonds Due March 2029 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.00%							4.00%
Long-term Debt, Gross	$ 300,000,000							$ 300,000,000	300,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%							4.00%
4.50% Series First Mortgage Bonds Due March 2039 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.50%							4.50%
Long-term Debt, Gross	$ 400,000,000							$ 400,000,000	400,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.50%							4.50%
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%							2.04%						2.04%
Value of non interest bearing first mortgage bonds														$ 207,200,000
Year Two	$ 11,000,000							$ 11,000,000
Long-term Debt, Gross	$ 0							$ 0	10,980,000
Debt Instrument, Interest Rate, Stated Percentage	2.04%							2.04%						2.04%
Securitization Bonds, 2.30% Series Senior Secured, Due August 2021 [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage															2.30%
Value of non interest bearing first mortgage bonds															$ 124,100,000
Year One									7,300,000
Debt Instrument, Interest Rate, Stated Percentage															2.30%
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%
Issuance Of Debt			$ 98,700,000
Debt Instrument, Interest Rate, Stated Percentage			2.67%
Securitization Bonds, 4.38% Series Senior Secured, Due November 2023 [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.38%							4.38%
Long-term Debt, Gross	$ 54,257,000							$ 54,257,000	106,214,000
Debt Instrument, Interest Rate, Stated Percentage	4.38%							4.38%
Mortgage Bonds Zero Point Six Two Percent Series Due November 2023 | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		0.62%
Debt Instrument, Interest Rate, Stated Percentage		0.62%
Long-term debt		$ 1,100,000,000
Subsequent Event [Member] | Hurricane Ike And Hurricane Gustav [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Year Three													$ 54,300,000
Subsequent Event [Member] | Tranche A One Two Point Six Seven Percent Due June Two Thousand Twenty Seven [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Year Three													$ 12,300,000
Year Four												$ 12,500,000
Year Five											$ 6,200,000
Grand Gulf [Member] | System Energy [Member]
Debt Instrument [Line Items]
Year One	$ 17,188,000							$ 17,188,000
Year Two	17,188,000							17,188,000
Year Three	17,188,000							17,188,000
Year Four	17,188,000							17,188,000
Year Five	17,188,000							17,188,000
Regulatory Assets	0							0
Regulatory Liabilities	$ 55,600,000							$ 55,600,000	$ 55,600,000