Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) - USD ($)		1 Months Ended				6 Months Ended
	Sep. 16, 2021	Jun. 30, 2019	Mar. 31, 2019	Feb. 28, 2019	Jan. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Short-term borrowings		$ 1,635,462,000				$ 1,635,462,000	$ 1,942,339,000
Amount of Facility		3,500,000,000				3,500,000,000
Amount Drawn/ Outstanding		$ 150,000,000				$ 150,000,000
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate		2.97%				2.97%
Commercial Paper program limit		$ 2,000,000,000				$ 2,000,000,000
Commercial Paper Amount Outstanding		1,635,000,000				1,635,000,000
Credit Facility [Member]
Debt Instrument [Line Items]
Amount of Facility		3,500,000,000				3,500,000,000
Amount of total borrowing capacity against which fronting commitments exist		20,000,000				$ 20,000,000
Line of credit facility, commitment fee percentage						0.225%
Line of Credit Facility, Interest Rate During Period						4.05%
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		250,000,000				$ 250,000,000
Amount of total borrowing capacity against which fronting commitments exist		5,000,000				5,000,000
Entergy Arkansas [Member] | Mortgage Bonds Four Point Two Percent Series Due April 2049 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt			$ 350,000,000
Debt instrument, interest rate, stated percentage			4.20%
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		450,000,000				450,000,000
Amount of total borrowing capacity against which fronting commitments exist		15,000,000				15,000,000
Entergy Louisiana [Member] | Mortgage Bonds, Four Point Two Zero Percent Series due April Twenty Fifty [Member] [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt			$ 525,000,000
Debt instrument, interest rate, stated percentage			4.20%
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		175,000,000				175,000,000
Letters of Credit Outstanding, Amount		200,000				$ 200,000	200,000
Entergy Mississippi [Member] | Mortgage bonds, 3.85% Series due June 2049 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 300,000,000
Debt instrument, interest rate, stated percentage		3.85%				3.85%
Entergy Mississippi [Member] | Mortgage Bonds Six Point Six Four Percent Series Due July Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		6.64%				6.64%
Repayments of Debt		$ 150,000,000
Entergy Texas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000,000				$ 200,000,000
Amount of total borrowing capacity against which fronting commitments exist		30,000,000				30,000,000
Letters of Credit Outstanding, Amount		2,200,000				2,200,000	$ 4,100,000
Entergy Texas [Member] | Mortgage Bonds Four Percent Due March 2029 [Domain]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt					$ 300,000,000
Debt instrument, interest rate, stated percentage					4.00%
Entergy Texas [Member] | Mortgage Bonds Four Point Five Percent Due March 2039 [Domain] [Domain]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt					$ 400,000,000
Debt instrument, interest rate, stated percentage					4.50%
Entergy Texas [Member] | 7.125% Series First Mortgage Bonds Due February 2019 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				7.125%
Repayments of Debt				$ 500,000,000
System Energy [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000,000				200,000,000
System Energy [Member] | Two Point Five Percent Series 2019 Revenue Refunding Bonds Due April 2022 [Domain]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt			$ 134,000,000
Debt instrument, interest rate, stated percentage			2.50%
Entergy Nuclear Vermont Yankee [Member]
Debt Instrument [Line Items]
Amount of Facility		139,000,000				$ 139,000,000
Line of credit facility, commitment fee percentage						0.20%
Amount Drawn/ Outstanding		139,000,000			$ 139,000,000	$ 139,000,000
Line of Credit Facility, Interest Rate During Period						4.19%
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		150,000,000				$ 150,000,000
Amount of total borrowing capacity against which fronting commitments exist		10,000,000				10,000,000
Letters of Credit Outstanding, Amount		10,200				10,200
System Energy VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		74,400,000				$ 74,400,000
Line of Credit Facility, Interest Rate During Period						3.40%
Line of credit facility commitment fee as a percentage of undrawn commitment amount						0.10%
System Energy VIE [Member] | Two Point Five Percent Series 2019 Revenue Refunding Bonds Due April 2022 [Domain]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			5.875%
Repayments of Debt			$ 134,000,000
Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		$ 20,600,000				$ 20,600,000
Line of Credit Facility, Interest Rate During Period						3.40%
Line of credit facility commitment fee as a percentage of undrawn commitment amount						0.10%
Entergy Arkansas VIE [Member] | Three Point Six Five Percent Series L Notes Due July Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.65%				3.65%
Entergy Louisiana Waterford VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		$ 79,200,000				$ 79,200,000
Line of Credit Facility, Interest Rate During Period						3.40%
Line of credit facility commitment fee as a percentage of undrawn commitment amount						0.10%
Entergy Louisiana Waterford VIE [Member] | Three Point Nine Two Percent Series H Dues February Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.92%				3.92%
Entergy Louisiana River Bend VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		$ 87,500,000				$ 87,500,000
Line of Credit Facility, Interest Rate During Period						3.40%
Line of credit facility commitment fee as a percentage of undrawn commitment amount						0.10%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage						0.225%
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 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 Twenty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 20,000,000				$ 20,000,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.57%
Line of Credit Facility, Expiration Date						Apr. 30, 2020
Credit Facility Of Three Hundred Fifty Million [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Amount of Facility		350,000,000				$ 350,000,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.57%
Line of Credit Facility, Expiration Date						Sep. 14, 2023
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		150,000,000				$ 150,000,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.57%
Line of Credit Facility, Expiration Date						Sep. 14, 2023
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility		150,000,000				$ 150,000,000
Letters of Credit Outstanding, Amount		1,300,000				1,300,000
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.82%
Line of Credit Facility, Expiration Date						Sep. 14, 2023
Credit Facility Of Thirty Seven Point Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		37,500,000				$ 37,500,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.82%
Line of Credit Facility, Expiration Date						May 31, 2020
Credit Facility Of Thirty Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		35,000,000				$ 35,000,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.82%
Line of Credit Facility, Expiration Date						May 31, 2020
Credit Facility Of Ten Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		10,000,000				$ 10,000,000
Letters of Credit Outstanding, Amount		0				0
Amount Drawn/ Outstanding		0				$ 0
Line of Credit Facility, Interest Rate During Period						3.82%
Line of Credit Facility, Expiration Date						May 31, 2020
Credit Facility Of Twenty Five Million [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Amount of Facility		25,000,000				$ 25,000,000
Letters of Credit Outstanding, Amount		800,000				800,000
Amount Drawn/ Outstanding		$ 0				$ 0
Line of Credit Facility, Interest Rate During Period						3.59%
Line of Credit Facility, Expiration Date						Nov. 20, 2021
Subsequent Event [Member] | System Energy VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Sep. 16, 2021
Subsequent Event [Member] | Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Sep. 16, 2021
Subsequent Event [Member] | Entergy Louisiana Waterford VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Sep. 16, 2021
Subsequent Event [Member] | Entergy Louisiana River Bend VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Sep. 16, 2021