Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) $ in Thousands	1 Months Ended							9 Months Ended
	Oct. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	May 01, 2021	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Amount of Facility		$ 3,500,000						$ 3,500,000
Amount Drawn/ Outstanding		$ 325,000						$ 325,000
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate		0.30%						0.30%
Commercial Paper program limit		$ 2,000,000						$ 2,000,000
Commercial Paper Amount Outstanding		1,006,000						1,006,000
Credit Facility [Member]
Debt Instrument [Line Items]
Amount of Facility		3,500,000						3,500,000
Amount of total borrowing capacity against which fronting commitments exist		20,000						$ 20,000
Line of credit facility, commitment fee percentage								0.225%
Line of Credit Facility, Interest Rate During Period								1.60%
1.90% Series senior notes due June 2028
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							1.90%
Amount							$ 650,000
2.40% Series senior notes due June 2031
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							2.40%
Amount							$ 650,000
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		250,000						$ 250,000
Amount of total borrowing capacity against which fronting commitments exist		5,000						5,000
Letters of Credit Outstanding, Amount		1,000						1,000
Entergy Arkansas [Member] | Revolving Credit Facility
Debt Instrument [Line Items]
Amount of Facility							150,000
Entergy Arkansas [Member] | Short-term revolving credit facility
Debt Instrument [Line Items]
Amount of Facility							$ 25,000
Entergy Arkansas [Member] | 3.35% Series mortgage bonds due June 2052
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							3.35%
Proceeds from Issuance of Debt							$ 400,000
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		450,000						450,000
Amount of total borrowing capacity against which fronting commitments exist		15,000						15,000
Letters of Credit Outstanding, Amount		1,500						1,500		$ 300
Entergy Louisiana [Member] | 2.35% Series mortgage bonds due June 2032
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							2.35%
Proceeds from Issuance of Debt							$ 500,000
Entergy Louisiana [Member] | 4.80% Series mortgage bonds due May 2021
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							4.80%
Repayments of Debt							$ 200,000
Entergy Louisiana [Member] | 3.10% Series mortgage bonds due June 2041
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							3.10%
Proceeds from Issuance of Debt							$ 500,000
Entergy Louisiana [Member] | 2.00% pollution control refunding revenue bonds due June 2030
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						2.00%
Proceeds from Issuance of Debt						$ 16,200
Entergy Louisiana [Member] | 2.50% pollution control refunding revenue bonds due April 2036
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						2.50%
Proceeds from Issuance of Debt						$ 182,480
Entergy Louisiana [Member] | 3.375% Pollution contol refunding revenue bonds due 2028
Debt Instrument [Line Items]
Repayments of Debt						83,680
Entergy Louisiana [Member] | 3.50% Pollution control refunding revenue bond due 2030
Debt Instrument [Line Items]
Repayments of Debt						$ 115,000
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		175,000						175,000
Letters of Credit Outstanding, Amount		700						700		200
Non-MISO letter of credit outstanding		1,000						1,000
Entergy Mississippi [Member] | 3.50% Series mortgage bonds due June 2051 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							3.50%
Proceeds from Issuance of Debt							$ 200,000
Entergy Mississippi [Member] | Revolving Credit Facility
Debt Instrument [Line Items]
Amount of Facility							$ 82,500
Entergy Texas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000						200,000
Amount of total borrowing capacity against which fronting commitments exist		30,000						30,000
Letters of Credit Outstanding, Amount		$ 800						$ 800		500
Entergy Texas [Member] | 2.55% Series mortgage bonds due June 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage									2.55%
Repayments of Debt					$ 125,000
Entergy Texas [Member] | 1.50% Series mortgage bonds due September 2026
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			1.50%
Proceeds from Issuance of Debt			$ 130,000
Entergy Texas [Member] | 4.10% Series mortgage bonds due September 2021
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		4.10%						4.10%
Repayments of Debt		$ 75,000
System Energy [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000						$ 200,000
System Energy [Member] | 2.375% refunding revenue bonds due June 2044
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				2.375%
Proceeds from Issuance of Debt				$ 83,695
System Energy [Member] | Outstanding revenue bonds
Debt Instrument [Line Items]
Repayments of Debt				$ 83,695
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		150,000						150,000
Amount of total borrowing capacity against which fronting commitments exist		10,000						10,000
Letters of Credit Outstanding, Amount		300						300		$ 200
System Energy VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		40,700						$ 40,700
Line of Credit Facility, Interest Rate During Period								1.18%
Line of credit facility commitment fee as a percentage of undrawn commitment amount								0.10%
Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		5,300						$ 5,300
Line of Credit Facility, Interest Rate During Period								1.20%
Line of credit facility commitment fee as a percentage of undrawn commitment amount								0.10%
Entergy Louisiana Waterford VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		49,300						$ 49,300
Line of Credit Facility, Interest Rate During Period								1.18%
Line of credit facility commitment fee as a percentage of undrawn commitment amount								0.10%
Entergy Louisiana River Bend VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		53,200						$ 53,200
Line of Credit Facility, Interest Rate During Period								1.17%
Line of credit facility commitment fee as a percentage of undrawn commitment amount								0.10%
Entergy Nuclear Vermont Yankee
Debt Instrument [Line Items]
Amount of Facility		139,000						$ 139,000
Amount Drawn/ Outstanding		$ 139,000						$ 139,000
Debt, weighted average interest rate		1.69%						1.69%
Line of credit facility commitment fee as a percentage of undrawn commitment amount								0.20%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage								0.375%
Consolidated debt ratio		0.65						0.65
Maximum [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Consolidated debt ratio of total capitalization								70.00%
Maximum [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Consolidated debt ratio of total capitalization								70.00%
Maximum [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Maximum [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Maximum [Member] | System Energy [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Consolidated debt ratio of total capitalization								70.00%
Maximum [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65						0.65
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage								0.075%
Credit Facility Of Three Hundred Fifty Million [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 350,000						$ 350,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.33%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		150,000						$ 150,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.21%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility		150,000						$ 150,000
Letters of Credit Outstanding, Amount		1,300						1,300
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.58%
Credit Facility Of Thirty Seven Point Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		37,500						$ 37,500
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.58%
Credit Facility Of Thirty Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		35,000						$ 35,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.58%
Credit Facility Of Ten Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		10,000						$ 10,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								1.58%
Credit Facility Of Twenty Five Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		25,000						$ 25,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		0						$ 0
Line of Credit Facility, Interest Rate During Period								2.75%
Credit Facility Of Twenty Five Million [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Amount of Facility		25,000						$ 25,000
Letters of Credit Outstanding, Amount		0						0
Amount Drawn/ Outstanding		25,000						$ 25,000
Line of Credit Facility, Interest Rate During Period								1.71%
Subsequent Event [Member] | Entergy Louisiana [Member] | 0.95% Series mortgage bonds due October 2024
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	0.95%
Proceeds from Issuance of Debt	$ 1,000,000
Credit Facility of Sixty Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		2,300						$ 2,300
Uncommitted Credit Facility		$ 65,000						$ 65,000