Rate And Regulatory Matters (Narrative) (Details)		1 Months Ended															3 Months Ended		12 Months Ended
	Nov. 01, 2023	Jun. 30, 2024	Apr. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Feb. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Oct. 31, 2023 USD ($)	May 31, 2023 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 30, 2022 USD ($)	Mar. 31, 2021	Dec. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 1988	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2022 USD ($)
Proceeds from Issuance of Long-Term Debt																	$ 2,206,338,000	$ 1,614,522,000
Regulatory Asset, Noncurrent				$ 5,432,306,000		$ 5,669,404,000											5,432,306,000			$ 5,432,306,000
Replacement Reserve Escrow				328,000,000		323,000,000											328,000,000			328,000,000
Asset Impairment Charges																	131,775,000	0
Regulatory Liability, Noncurrent				3,334,360,000		3,116,926,000											3,334,360,000			3,334,360,000
Accounts Payable, Current				1,187,454,000		1,566,745,000											1,187,454,000			1,187,454,000
Entergy Louisiana [Member]
Proceeds from Issuance of Long-Term Debt																	1,693,150,000	526,764,000
Regulatory Asset, Noncurrent				1,637,018,000		1,648,852,000											1,637,018,000			1,637,018,000
Replacement Reserve Escrow				247,100,000		243,800,000											247,100,000			247,100,000
Regulatory Liability, Noncurrent				1,458,606,000		1,407,689,000											1,458,606,000			1,458,606,000
Accounts Payable, Current				348,340,000		467,414,000											348,340,000			348,340,000
Entergy Mississippi [Member]
Proceeds from Issuance of Long-Term Debt																	99,860,000	99,916,000
Regulatory Asset, Noncurrent				582,242,000		579,076,000											582,242,000			582,242,000
Replacement Reserve Escrow				700,000		700,000											700,000			700,000
Monthly storm damage provision																	1,750,000
Storm Damage Provision Balance				15,000,000		15,000,000											15,000,000			15,000,000
Storm damage provision balance at which collections will resume																	10,000,000
Disbursement from storm reserve rescrow						34,500,000
Regulatory Liability, Noncurrent				33,652,000		33,696,000											33,652,000			33,652,000
Accounts Payable, Current				119,163,000		92,659,000											119,163,000			119,163,000
Entergy New Orleans [Member]
Regulatory Asset, Noncurrent				173,110,000		182,367,000											173,110,000			173,110,000
Replacement Reserve Escrow				80,600,000		78,700,000											80,600,000			80,600,000
Regulatory Liability, Noncurrent				257,873,000		90,434,000											257,873,000			257,873,000
Accounts Payable, Current				31,667,000		39,813,000											31,667,000			31,667,000
Entergy Texas [Member]
Regulatory Asset, Noncurrent				572,425,000		596,606,000											572,425,000			572,425,000
Regulatory Liability, Noncurrent				41,579,000		43,013,000											41,579,000			41,579,000
Accounts Payable, Current				173,694,000		195,703,000											173,694,000			173,694,000
Entergy Arkansas [Member]
Proceeds from Issuance of Long-Term Debt																	179,937,000	514,206,000
Regulatory Asset, Noncurrent				1,687,536,000		1,885,361,000											1,687,536,000			1,687,536,000
Payments for Legal Settlements															$ 135,000,000
Refund to customers, plus interest, associated with recalculated bandwidth remedy														$ 13,700,000
Asset Impairment Charges																	131,775,000	0
Regulatory Liability, Noncurrent				782,564,000		759,181,000											782,564,000			782,564,000
Accounts Payable, Current				195,003,000		215,502,000											195,003,000			195,003,000
Entergy Arkansas [Member] | Opportunity Sales [Member]
Regulatory Asset, Noncurrent						131,800,000
Asset Impairment Charges																	131,800,000
Asset Impairment Charges, net of tax																	99,100,000
System Energy [Member]
Proceeds from Issuance of Long-Term Debt																	233,933,000	$ 473,687,000
Regulatory Asset, Noncurrent				451,718,000		446,360,000											451,718,000			451,718,000
Regulatory Liability, Noncurrent				760,084,000		782,912,000											760,084,000			760,084,000
Accounts Payable, Current				85,273,000		73,580,000											85,273,000			85,273,000
Regulatory Liability related to potential settlement refund				80,000,000													80,000,000			80,000,000
System Energy [Member] | Subsequent Event [Member] | Grand Gulf [Member] | Entergy New Orleans [Member]
Public Utilities, Approved Return on Equity, Percentage		9.65%
Public Utilities, Approved Equity Capital Structure, Percentage		52.00%
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy Louisiana [Member] | System Energy [Member]
Payments for Legal Settlements							$ 18,200,000
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy New Orleans [Member] | System Energy [Member]
Payments for Legal Settlements							22,300,000
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member]
Payments for Legal Settlements									$ 103,500,000
Disallowance of future sale-leaseback renewal costs recovery										$ 11,500,000
Calculated refund of sale-leaseback renewal rental costs, including interest									89,800,000
One-time accumulated deferred income tax credit													$ 25,200,000
Calculated net refund for excess depreciation expense									$ 13,700,000
Recalculated Payments for Legal Settlements							35,700,000
Recalculated proceeds from legal settlements							67,800,000
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member] | Entergy Arkansas [Member]
Recalculated proceeds from legal settlements							27,300,000
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member] | Grand Gulf [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																11.50%
Unit Power Sales Agreement Complaint [Member] | System Energy [Member]
Potential settlement refund											$ 18,000,000
FERC ALJ initial decision recommended refunds																	69,700,000
Interest component of FERC ALJ initial decision recommended refunds																	94,300,000
FERC ALJ initial decision modification to cash working capital allowance								$ 36,400,000
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member]
Earned return on equity												10.94%
Recommended adjustment to earned return on equity												9.32%
Return on equity complaint, estimated annual rate reduction				14,100,000													14,100,000			14,100,000
Estimated return on equity complaint refund				24,800,000													24,800,000			24,800,000
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member] | Maximum [Member]
ALJ recommended equity capital structure, percentage												48.15%
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member]
Energy Cost Recovery Rider Rate Per kWh																				0.01883
Adjustment to over-recovery balance				43,700,000													43,700,000			43,700,000
Credit for recovery attributed to net metering costs																	9,000,000
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member] | Subsequent Event [Member]
Energy Cost Recovery Rider Rate Per kWh																			$ 0.00882
Requested Energy Cost Recovery Rider Rate Per kWh																			$ 0.00882
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 63,400,000
Public Utilities, Requested Return on Equity, Percentage				7.10%
Annual depreciation expense increase					$ 55,200,000
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member] | Maximum [Member]
Cap on retail revenues in test year filing				0.04
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount			$ 32,600,000
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member] | Maximum [Member]
Cap on retail revenues in look-back filing			0.02
2024 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 12,600,000
Public Utilities, Approved Return on Equity, Percentage			9.35%
2024 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member] | Electricity [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 7,000,000
Earned return on equity			8.66%
2024 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member] | Natural Gas, US Regulated [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 5,600,000
Earned return on equity			5.87%
System Energy Settlement with the City Council [Member] | Entergy New Orleans [Member] | Subsequent Event [Member]
Proceeds from Legal Settlements			$ 18,000,000
Cumulative proceeds from legal settlements			$ 116,000,000
System Energy Settlement with the City Council [Member] | System Energy [Member]
Regulatory liabilitity related to settlements and potential future refunds																					$ 588,000,000
System Energy Settlement with the City Council [Member] | System Energy [Member] | Entergy New Orleans [Member] | Refund from System Energy settlement with the City Council [Member]
Accounts Payable, Current				$ 98,000,000													$ 98,000,000			98,000,000
System Energy Settlement with the City Council [Member] | Entergy Arkansas and and Entergy Mississippi [Member] | Grand Gulf [Member]
Long-Term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased																	85.00%
System Energy Settlement with the City Council [Member] | Entergy Arkansas and and Entergy Mississippi | Grand Gulf [Member]
Long-Term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased																	65.00%
Storm cost recovery combined dual cost filing [Member] | Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				5,200,000
Storm Damage Provision Balance				70,000,000													$ 70,000,000			70,000,000
Storm damage provision balance at which collections will resume				60,000,000
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				3,500,000
Storm cost recovery combined dual cost filing [Member] | Entergy Mississippi [Member] | Maximum [Member]
Storm Damage Provision Balance				50,000,000													50,000,000			50,000,000
Storm cost recovery combined dual cost filing [Member] | Entergy Mississippi [Member] | Minimum [Member]
Storm Damage Provision Balance				$ 40,000,000													$ 40,000,000			$ 40,000,000
System Energy Settlement with the APSC [Member] | Entergy Arkansas [Member]
Proceeds from Legal Settlements							49,500,000
Cumulative proceeds from legal settlements							$ 142,000,000
System Energy Settlement with the APSC [Member] | System Energy [Member]
Regulatory liabilitity related to settlements and potential future refunds																					$ 588,000,000
System Energy Settlement with the APSC [Member] | System Energy [Member] | Entergy Arkansas [Member]
Public Utilities, Approved Return on Equity, Percentage	9.65%
Public Utilities, Approved Equity Capital Structure, Percentage	52.00%
System Energy Settlement with the APSC [Member] | System Energy [Member] | Entergy Arkansas [Member] | Refund from System Energy settlement with the APSC [Member]
Accounts Payable, Current						$ 93,000,000