Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) - USD ($)	1 Months Ended					9 Months Ended
	Sep. 30, 2025	May 31, 2025	Mar. 31, 2025	Feb. 28, 2025	Jan. 31, 2025	Sep. 30, 2025	Jan. 02, 2025
0.9% Senior notes due September 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.90%					0.90%
Repayments of Debt	$ 800,000,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.64%					4.64%
Commercial Paper program limit	$ 2,000,000,000					$ 2,000,000,000
Commercial Paper	1,398,000,000					1,398,000,000
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	250,000,000					250,000,000
Entergy Arkansas [Member] | 5.45% Series mortgage bonds due June 2034
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 300,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.45%
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	450,000,000					450,000,000
Entergy Louisiana [Member] | 5.80% Series mortgage bonds due March 2055
Debt Instrument [Line Items]
Proceeds from Issuance of Debt					$ 750,000,000
Debt Instrument, Interest Rate, Stated Percentage							5.80%
Entergy Louisiana [Member] | 3.78% Series mortgage bonds due April 2025 (Legacy)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.78%
Repayments of Debt			$ 190,000,000
Entergy Louisiana [Member] | 3.78% Series mortgage bonds due April 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.78%
Repayments of Debt			$ 110,000,000
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	200,000,000					200,000,000
Entergy Mississippi [Member] | 5.80% Series mortgage bonds due April 2055
Debt Instrument [Line Items]
Proceeds from Issuance of Debt			$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage			5.80%
Entergy Texas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	200,000,000					200,000,000
Entergy Texas [Member] | 5.25% Series mortgage bonds due April 2035
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage				5.25%
System Energy [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	200,000,000					200,000,000
System Energy [Member] | 5.30% Series mortgage bonds due December 2034
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 240,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.30%
System Energy [Member] | 2.14% Series mortgage bonds due December 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.14%
Repayments of Debt		$ 200,000,000
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings	$ 150,000,000					$ 150,000,000
Entergy New Orleans [Member] | 3.0% Series mortgage bonds due March 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.00%
Repayments of Debt			$ 78,000,000
Entergy New Orleans [Member] | Unsecured term loan due March 2026
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				$ 80,000,000
System Energy VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.10%
Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.10%
Entergy Louisiana Waterford VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.10%
Entergy Louisiana River Bend VIE [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.10%
Maximum [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.375%
Ratio of Indebtedness to Net Capital	0.65					0.65
Consolidated debt ratio of lessees total capitalization						70.00%
Maximum [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.375%
Ratio of Indebtedness to Net Capital	0.65					0.65
Consolidated debt ratio of lessees total capitalization						70.00%
Maximum [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.375%
Ratio of Indebtedness to Net Capital	0.65					0.65
Maximum [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.375%
Ratio of Indebtedness to Net Capital	0.65					0.65
Maximum [Member] | System Energy [Member]
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital	0.65					0.65
Consolidated debt ratio of lessees total capitalization						70.00%
Maximum [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.375%
Ratio of Indebtedness to Net Capital	0.65					0.65
Minimum [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.075%
Minimum [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.075%
Minimum [Member] | Entergy Mississippi [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.075%
Minimum [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.075%
Minimum [Member] | Entergy New Orleans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage						0.075%
Credit Facility of $3 Billion
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,000,000,000					$ 3,000,000,000
Letters of Credit Outstanding, Amount	3,000,000					$ 3,000,000
Line of Credit Facility, Commitment Fee Percentage						0.225%
Long-Term Line of Credit	0					$ 0
Line of Credit Facility, Remaining Borrowing Capacity	2,997,000,000					2,997,000,000
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	$ 20,000,000					$ 20,000,000
Line of Credit Facility, Interest Rate at Period End	5.76%					5.76%
Credit Facility of $3 Billion | Maximum [Member]
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital	0.65					0.65
Uncommitted Credit Facility of $160 Million | Entergy Texas [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 160,000,000					$ 160,000,000
Letters of Credit Outstanding, Amount	$ 0					$ 0
Line of Credit Facility, Commitment Fee Percentage						1.05%