Rate And Regulatory Matters (Narrative) (Details) - USD ($)	1 Months Ended											3 Months Ended		9 Months Ended	12 Months Ended			36 Months Ended	57 Months Ended
	Apr. 30, 2023	Mar. 31, 2023	Jan. 31, 2023	Dec. 31, 2022	Nov. 30, 2022	Oct. 31, 2022	Sep. 30, 2022	Aug. 31, 2022	Apr. 30, 2022	Mar. 31, 2021	Dec. 31, 1988	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Sep. 30, 2020	Sep. 30, 2021
Impairment of Long-Lived Assets Held-for-use												$ 0	$ 744,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 2,157,341,000		$ 1,844,171,000								2,157,341,000		$ 1,844,171,000		$ 2,157,341,000	$ 1,844,171,000
Proceeds from the issuance of long-term debt												1,614,522,000	2,553,369,000
Storm Reserve Escrow Account		406,150,000		401,955,000								406,150,000		401,955,000		406,150,000	401,955,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		5,493,703,000		6,036,397,000								5,493,703,000		6,036,397,000		5,493,703,000	6,036,397,000
Long-term Transition Bond, Noncurrent		292,912,000		292,760,000								292,912,000		292,760,000		292,912,000	292,760,000
Deferred Fuel Cost		282,429,000		710,401,000								282,429,000		710,401,000		282,429,000	710,401,000
Replacement Reserve Escrow		406,000,000		402,000,000								406,000,000		402,000,000		406,000,000	402,000,000
Entergy Louisiana [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		822,944,000		736,969,000								822,944,000		736,969,000		822,944,000	736,969,000
Proceeds from the issuance of long-term debt												526,764,000	1,506,637,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs									$ 2,640,000,000
Storm Reserve Escrow Account		296,443,000		293,406,000								296,443,000		293,406,000		296,443,000	293,406,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		1,564,124,000		2,056,179,000								1,564,124,000		2,056,179,000		1,564,124,000	2,056,179,000
Deferred Fuel Cost		0		159,183,000								0		159,183,000		0	159,183,000
Replacement Reserve Escrow		$ 296,400,000		293,400,000								$ 296,400,000		293,400,000		$ 296,400,000	293,400,000
LURC's percentage of annual dividends												1.00%
ELL's percentage of annual dividends												99.00%
Proceeds from Contributed Capital												$ 1,457,676,000	0
Regulatory charge recorded as a result of reduction in income tax expense												103,000,000
Regulatory charge recorded as a result of reduction in income tax expense, net of tax												76,000,000
Reduction to income tax expense - net of provision for uncertain tax positions												133,000,000
Reduction to income tax expense - net, offset by other tax charges												$ 129,000,000
Entergy Louisiana [Member] | Restoration Law Trust II (storm trust II) [Member]
Regulatory Asset [Abstract]
LURC's beneficial interest in the storm trust, percentage		1.00%										1.00%				1.00%
Preferred Stock, Dividend Rate, Percentage		7.50%
Preferred Stock, Liquidation Preference, Value		$ 100										$ 100				$ 100
Class preferred non voting membership interest units acquired in wholly owned subsidiary		14,576,757.48										14,576,757.48				14,576,757.48
Entergy Louisiana [Member] | Deferred COVID 19 Costs
Regulatory Asset [Abstract]
Regulatory Assets		$ 47,800,000										$ 47,800,000				$ 47,800,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri
Regulatory Asset [Abstract]
Carrying costs associated with storm restoration costs														3,000,000
Entergy Louisiana [Member] | Hurricane Ida
Regulatory Asset [Abstract]
Carrying costs associated with storm restoration costs														57,000,000
Entergy Louisiana [Member] | Hurricane Ida
Total Restoration Costs For Repair and Replacement of Electrical System						$ 2,640,000,000			2,540,000,000
Non-capital storm costs									586,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent							$ 1,000,000,000		1,960,000,000											$ 1,000,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs									2,600,000,000
Regulatory Asset [Abstract]
Carrying costs associated with storm restoration costs						$ 59,100,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri
Total Restoration Costs For Repair and Replacement of Electrical System				2,570,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs									$ 32,000,000
Regulatory Asset [Abstract]
Carrying costs associated with storm restoration costs				59,200,000
Aggregate principal amount of system restoration bonds authorization requested			$ 1,491,000,000	1,657,000,000										1,657,000,000			1,657,000,000
aggregate principal amount of system restoration bond authorization approved		1,491,000,000										1,491,000,000				1,491,000,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri | Storm Costs
Regulatory Asset [Abstract]
Regulatory Assets		180,000,000										180,000,000				180,000,000
Entergy Louisiana [Member] | Subsequent Event [Member] | Deferred COVID 19 Costs
Regulatory Asset [Abstract]
Amount of long-term debt proposed to be used to generate earnings to reduce certain regulatory assets	$ 1,600,000,000
Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount		39,800,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 218,611,000		170,191,000								218,611,000		170,191,000		218,611,000	170,191,000
Proceeds from the issuance of long-term debt												99,916,000	0
Public Utilities, Requested Return on Equity, Percentage		6.67%
Storm Reserve Escrow Account		$ 33,896,000		33,549,000								33,896,000		33,549,000		33,896,000	33,549,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		518,440,000		519,460,000								518,440,000		519,460,000		518,440,000	519,460,000
Deferred Fuel Cost		76,206,000		143,211,000								76,206,000		143,211,000		76,206,000	143,211,000
Replacement Reserve Escrow		33,900,000		33,500,000								33,900,000		33,500,000		33,900,000	33,500,000
Entergy New Orleans [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		23,011,000		39,607,000								23,011,000		39,607,000		23,011,000	39,607,000
Storm Reserve Escrow Account		75,811,000		75,000,000								75,811,000		75,000,000		75,811,000	75,000,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		199,845,000		202,112,000								199,845,000		202,112,000		199,845,000	202,112,000
Long-term Transition Bond, Noncurrent		17,757,000		17,697,000								17,757,000		17,697,000		17,757,000	17,697,000
Deferred Fuel Cost		3,188,000		10,153,000								3,188,000		10,153,000		3,188,000	10,153,000
Replacement Reserve Escrow		75,800,000		75,000,000.0								75,800,000		75,000,000.0		75,800,000	75,000,000.0
Entergy Texas [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		486,164,000		339,139,000								486,164,000		339,139,000		486,164,000	339,139,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		557,147,000		578,682,000								557,147,000		578,682,000		557,147,000	578,682,000
Long-term Transition Bond, Noncurrent		275,154,000		275,064,000								275,154,000		275,064,000		275,154,000	275,064,000
Deferred Fuel Cost		150,877,000		258,115,000								150,877,000		258,115,000		150,877,000	258,115,000
Entergy Texas [Member] | Deferred COVID 19 Costs
Regulatory Asset [Abstract]
Regulatory Assets		10,400,000										10,400,000				10,400,000
Entergy Arkansas [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		448,820,000		417,244,000								448,820,000		417,244,000		448,820,000	417,244,000
Proceeds from the issuance of long-term debt												514,206,000	212,060,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		1,837,282,000		1,810,281,000								1,837,282,000		1,810,281,000		1,837,282,000	1,810,281,000
Energy Cost Recovery Rider Rate Per kWh																0.01639
Deferred Fuel Cost		52,158,000		139,739,000								52,158,000		139,739,000		52,158,000	139,739,000
Entergy Arkansas [Member] | Deferred COVID 19 Costs
Regulatory Asset [Abstract]
Regulatory Assets		39,000,000										39,000,000				39,000,000
Entergy Arkansas [Member] | 2021 February Winter Storms
Regulatory Asset [Abstract]
Deferred Fuel Cost		32,000,000										32,000,000				32,000,000
Entergy Arkansas [Member] | Subsequent Event [Member]
Regulatory Asset [Abstract]
Energy Cost Recovery Rider Rate Per kWh															$ 0.01883
Requested Energy Cost Recovery Rider Rate Per kWh															$ 0.01883
System Energy [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		122,510,000		102,987,000								122,510,000		102,987,000		122,510,000	102,987,000
Proceeds from the issuance of long-term debt												473,687,000	225,956,000
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent		418,368,000		415,121,000								$ 418,368,000		415,121,000		418,368,000	415,121,000
Grand Gulf [Member] | System Energy [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage												11.50%
Generation Cost Recovery Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 92,800,000
Regulatory Asset [Abstract]
Public Utilities, Interim Rate Increase (Decrease), Amount							$ 5,700,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Louisiana [Member]
Regulatory Asset [Abstract]
Proceeds from Legal Settlements			27,800,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Mississippi [Member]
Regulatory Asset [Abstract]
Allocated sale-leaseback annual renewal costs												$ 5,700,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy New Orleans [Member]
Regulatory Asset [Abstract]
Proceeds from Legal Settlements			34,000,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Arkansas [Member]
Regulatory Asset [Abstract]
Proceeds from Legal Settlements			41,700,000
Grand Gulf Sale-leaseback Renewal Complaint | System Energy [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage											11.50%
Regulatory Asset [Abstract]
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
Unit Power Sales Agreement Complaint | Entergy Arkansas [Member]
Regulatory Asset [Abstract]
Proceeds from Legal Settlements			$ 41,700,000
Unit Power Sales Agreement Complaint | System Energy [Member]
Regulatory Asset [Abstract]
Potential settlement refund					$ 18,000,000
Fuel reconciliation | Entergy Texas [Member]
Regulatory Asset [Abstract]
Eligible fuel and purchased power expenses, net of certain revenues credited to such expenses and other adjustments																		$ 1,700,000,000
Deferred fuel under-recovery balance, including interest, for reconciliation period													$ 103,100,000					$ 103,100,000
Fuel reconciliation | Entergy Texas [Member] | Winter Storm Uri
Regulatory Asset [Abstract]
Proposed disallowance for fuel purchase		5,200,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member]
Regulatory Asset [Abstract]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		19,800,000
Requested refund for true-up of demand-side management costs		1,300,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Formula Rate Plan Historical Year Rate Adjustment Member
Regulatory Asset [Abstract]
Regulatory Assets, Noncurrent				$ 18,200,000										$ 18,200,000			$ 18,200,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member]
Regulatory Asset [Abstract]
Public Utilities, Interim Rate Increase (Decrease), Amount	$ 27,900,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member] | Maximum [Member]
Regulatory Asset [Abstract]
Public Utilities, Interim Rate Increase (Decrease), Percentage	2.00%
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 25,600,000
Regulatory Asset [Abstract]
Authorized return on common equity	9.35%
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member] | Electricity [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 17,400,000
Regulatory Asset [Abstract]
Earned return on common equity	7.34%
Additional revenue increase due to previously approved amounts	$ 3,400,000
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Subsequent Event [Member] | Natural Gas, US Regulated [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 8,200,000
Regulatory Asset [Abstract]
Earned return on common equity	3.52%
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member]
Regulatory Asset [Abstract]
Earned return on common equity										10.94%
Recommended adjustment to earned return on equity										9.32%
Return on equity complaint, estimated annual rate reduction		$ 31,000,000										31,000,000				$ 31,000,000
Payments for Legal Settlements												$ 38,000,000
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member] | Maximum [Member]
Regulatory Asset [Abstract]
ALJ recommended equity capital structure, percentage										48.15%