Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Amount of Facility		$ 3,500.0
Amount Drawn/ Outstanding		$ 150.0
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate		4.93%
Commercial Paper program limit		$ 2,000.0
Commercial Paper Amount Outstanding		865.6
Credit Facility [Member]
Debt Instrument [Line Items]
Amount of Facility		3,500.0
Amount of total borrowing capacity against which fronting commitments exist		$ 20.0
Line of credit facility, commitment fee percentage		0.225%
Line of Credit Facility, Interest Rate During Period		6.12%
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		$ 250.0
Amount of total borrowing capacity against which fronting commitments exist		5.0
Letters of Credit Outstanding, Amount		0.1
Entergy Arkansas [Member] | 5.15% Series mortgage bonds due January 2033
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	$ 425.0
Debt instrument, interest rate, stated percentage	5.15%
Entergy Arkansas [Member] | Mortgage Bonds Three Point Zero Five Percent Series Due June Two Thousand Twenty Three
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.05%
Repayments of Debt	$ 250.0
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		450.0
Amount of total borrowing capacity against which fronting commitments exist		15.0
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200.0
Letters of Credit Outstanding, Amount		0.3	$ 0.2
Non-MISO letter of credit outstanding		9.2
Entergy Texas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200.0
Amount of total borrowing capacity against which fronting commitments exist		30.0
Letters of Credit Outstanding, Amount		0.5	2.4
System Energy [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		$ 200.0
System Energy [Member] | 6.00% Series mortgage bonds due April 2028
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	325.0
Debt instrument, interest rate, stated percentage		6.00%
System Energy [Member] | Unsecured Term Loan due November 2023
Debt Instrument [Line Items]
Long-Term Debt, Gross		$ 50.0
System Energy [Member] | 4.10% Series mortgage bonds due April 2023
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		4.10%
Repayments of Debt	$ 250.0
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		$ 150.0
Amount of total borrowing capacity against which fronting commitments exist		10.0
Letters of Credit Outstanding, Amount			$ 0.2
System Energy VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding		$ 55.9
Line of Credit Facility, Interest Rate During Period		5.59%
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		$ 31.5
Line of Credit Facility, Interest Rate During Period		5.70%
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		$ 52.1
Line of Credit Facility, Interest Rate During Period		5.59%
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		$ 58.5
Line of Credit Facility, Interest Rate During Period		5.67%
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		$ 139.0
Amount Drawn/ Outstanding		$ 139.0
Debt, weighted average interest rate		6.14%
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
Maximum [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65
Consolidated debt ratio of total capitalization		70.00%
Maximum [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65
Consolidated debt ratio of total capitalization		70.00%
Maximum [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65
Maximum [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		0.65
Maximum [Member] | System Energy [Member]
Debt Instrument [Line Items]
Consolidated debt ratio		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
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		$ 350.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.16%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 150.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.03%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 150.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 100.0
Line of Credit Facility, Interest Rate During Period		5.98%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 150.0
Letters of Credit Outstanding, Amount		1.1
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.16%
Credit Facility Of Ten Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 10.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.41%
Credit Facility Of Twenty Five Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 25.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.56%
Credit Facility Of Twenty Five Million [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Amount of Facility		$ 25.0
Letters of Credit Outstanding, Amount		0.0
Amount Drawn/ Outstanding		$ 0.0
Line of Credit Facility, Interest Rate During Period		6.47%
Credit Facility of Sixty Five Million [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$ 6.7
Uncommitted Credit Facility		$ 65.0