Rate And Regulatory Matters (Narrative) (Details)			1 Months Ended																																													2 Months Ended	3 Months Ended				6 Months Ended	8 Months Ended	9 Months Ended		12 Months Ended							15 Months Ended	36 Months Ended	72 Months Ended
	Jul. 31, 2019 USD ($)	Jan. 01, 2018 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2020 USD ($)	Nov. 30, 2020 USD ($)	Oct. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	May 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Feb. 29, 2020 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Nov. 30, 2019 USD ($)	Oct. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Aug. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	May 31, 2019 USD ($)	Mar. 31, 2019 USD ($) $ / kWh	Feb. 28, 2019 USD ($)	Jan. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Nov. 30, 2018 USD ($)	Oct. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jul. 31, 2018 USD ($)	May 31, 2018 USD ($)	Mar. 31, 2018 USD ($) $ / kWh	Feb. 28, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2017 $ / kWh	Jan. 31, 2017	Apr. 30, 2016	May 31, 2015 USD ($)	Aug. 31, 2014 USD ($) $ / unit shares	Jun. 30, 2014 USD ($)	Jan. 31, 2014 USD ($)	Jul. 31, 2010 USD ($) $ / unit shares	Jun. 30, 2010 USD ($)	Aug. 31, 2008 USD ($) $ / unit shares	Jul. 31, 2008 USD ($) shares	Apr. 30, 2007 USD ($)	Aug. 31, 2020 USD ($)	Oct. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2020 USD ($)	Aug. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) $ / kWh	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Apr. 23, 2018	Mar. 31, 2019 USD ($)	Dec. 31, 2024 USD ($)	Jan. 31, 2021 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2016 USD ($)	Apr. 30, 2010 USD ($)	Aug. 26, 2008 USD ($)	Jul. 29, 2008 USD ($)	Apr. 30, 2008 USD ($)
Regulatory Assets [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%																																																												35.00%	35.00%
Asset Write-Offs, Impairments, And Related Charges																																																											$ 26,379,000		$ 226,678,000	$ 491,739,000
Payments to Acquire Other Property, Plant, and Equipment																																																											(247,121,000)		(305,472,000)	(26,623,000)
After-Tax Asset Impairment Charge																																																			$ 4,200,000
Income before income taxes																																																											1,285,147,000		1,088,419,000	(174,271,000)
Deferred Fuel Cost				$ 4,380,000											$ 0																																								$ 4,380,000				4,380,000		0
Regulatory Assets, Noncurrent				6,076,549,000											5,292,055,000																																								6,076,549,000				6,076,549,000		5,292,055,000
Regulatory Liability, Noncurrent				2,323,851,000											1,961,005,000																																								2,323,851,000				2,323,851,000		1,961,005,000
Public Utilities, Requested Rate Increase (Decrease), Amount																																																													7,300,000
Increase (Decrease) in Regulatory Liabilities																																																											238,669,000		(14,781,000)	(803,323,000)
Public Utilities Temporary Rate Increase Amount											$ 24,300,000
Construction work in progress				2,012,030,000											2,823,291,000																																								2,012,030,000				2,012,030,000		2,823,291,000
Long-term debt																																																											12,619,201,000		$ 9,304,396,000	8,035,536,000
Hurricanes Laura, Delta, and Zeta
Regulatory Assets [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent				1,980,000,000																																																			1,980,000,000				1,980,000,000
Non-capital storm costs																																																	$ 420,000,000
Total Restoration Costs For Repair and Replacement of Electrical System																																																											$ 2,400,000,000
Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Rate Increase Included in Formula Rate Plan																						$ 109,500,000									$ 4,800,000																						$ 103,000,000
Formula rate plan increase excluding Tax Cuts and Jobs Act Credits																															$ 98,000,000
Bond proceeds loaned by LCDA to LURC under Louisiana Act 55 financing																																								$ 309,000,000
Annual customer credits																																									$ 6,200,000
LCDA issuance of bonds under Louisiana Act 55 financing																																								314,850,000
Amount transfered to restricted escrow account as storm damage reserve																																								16,000,000
Amortization period of cost																																																											27 years
Earned Return on Common Equity Resulting From Revenue-Neutral Realignments to Other Recovery Mechanisms																															8.16%
Earned Return on Common Equity Excluding Realignments																															9.88%
Earned return on common equity																																																													10.61%
Income before income taxes																																																											$ 700,028,000		$ 813,160,000	621,003,000
Deferred Fuel Cost				2,250,000											0																																								2,250,000				2,250,000		0
Minimum customer benefits																																									$ 30,800,000
Bond proceeds transfered to company under Louisiana Act 55 financing																																								$ 293,000,000
Regulatory Assets, Noncurrent				1,726,066,000											1,315,211,000																																								1,726,066,000				1,726,066,000		1,315,211,000
Refund to customers related to claim of vendor fault in servicing nuclear plant for Entergy Gulf States Louisiana business																									$ 900,000
Refund to customers related to claim of vendor fault in servicing nuclear plant																$ 2,300,000			$ 4,300,000						$ 7,300,000
Public Utilities, Requested Return on Equity, Percentage										9.80%																																											9.66%
Regulatory Liability, Noncurrent				918,293,000											794,140,000																																								918,293,000				$ 918,293,000		794,140,000
Public Utilities, Requested Rate Increase (Decrease), Amount																						118,700,000
Rate At Which Electricity Sold To Retail Customers | $ / kWh																																																											0.046
Formula rate plan revenue decrease																														$ 17,600,000																															8,900,000
Increase (Decrease) in Regulatory Liabilities																																																											$ 71,698,000		(35,881,000)	(125,185,000)
Monthly regulatory liability established to reflect tax benefits already included in retail rates		$ 9,100,000
Regulatory asset related to costs associated with COVID-19 pandemic				48,800,000																																																			48,800,000				48,800,000
Projected increase in revenue requirement				35,000,000																																																			108,000,000
Bandwidth around midpoint of return on equity										6000.00%
Regulatory Assets				302,500,000																																																			302,500,000				302,500,000
Construction work in progress				667,281,000											1,383,603,000																																								667,281,000				667,281,000		1,383,603,000
Amount transfer from restricted escrow account as storm damage reserve					$ 257,000,000
Long-term debt																																																											3,675,083,000		2,691,133,000	2,319,799,000
Refund to customers related to purchased gas adjustment clause filings							$ 29,000						$ 29,000
Increase (Reduction) in income tax resulting from Act 55 financing settlement																																																		$ 32,000,000
Reduction of income tax expense due reversal of UTPs																																																		58,000,000
Increase to income tax expense due to reduction of the DTA																																																		26,000,000
Regulatory charge due to LPSC Act 55 Financing Order - Gross																																																		29,000,000
Regulatory charge due to LPSC Act 55 Financing Order - Net of Tax																																																		$ 21,000,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, and Zeta
Regulatory Assets [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent				1,670,000,000																																																			1,670,000,000				1,670,000,000
Non-capital storm costs																																																	330,000,000
Total Restoration Costs For Repair and Replacement of Electrical System																																																											2,000,000,000.0
Entergy Louisiana [Member] | Mortgage Bonds Zero Point Six Two Percent Series Due November Two Thousand Twenty Three
Regulatory Assets [Line Items]
Long-term Debt, Gross				$ 1,100,000,000											0																																								$ 1,100,000,000				$ 1,100,000,000		$ 0
Long-term debt					$ 1,100,000,000
Debt Instrument, Interest Rate, Stated Percentage				0.62%	0.62%																																																		0.62%				0.62%
Entergy Louisiana [Member] | Hurricane Rita [Member]
Regulatory Assets [Line Items]
Reduction to Louisiana Act 55 financing savings obligation regulatory liability due to Tax Cuts and Jobs Act																										$ 22,300,000																																				22,300,000
Minimum amount of benefits committed to pass on to the customers																																																																										$ 40,000,000
Prospective Annual rate reductions for five years																																																																										$ 8,000,000
Bond issued by LCDA																																																																									$ 687,700,000
Amount transfer to restricted escrow account as storm damage reserve by corporation																																														$ 152,000,000
Amount Transferred to Entergy Louisiana																																														527,000,000
Proceed from loan by LCDA to corporation LURC																																														679,000,000
Amount used to acquire membership interest units in wholly owned Subsidiary																																														$ 545,000,000
Class preferred, non-voting, membership interest units | shares																																														5,449,861.85
Annual distribution rate																																														10.00%
Amount withdrawn from restricted escrow account as approved by units of wholly owned subsidiary																																														$ 17,800,000
Entergy Louisiana [Member] | Hurricane Gustav and Ike [Member]
Regulatory Assets [Line Items]
Reduction to Louisiana Act 55 financing savings obligation regulatory liability due to Tax Cuts and Jobs Act																										2,700,000																																				$ 2,700,000
Minimum amount of benefits committed to pass on to the customers																																																																							$ 43,300,000
Prospective Annual rate reductions for five years																																																																							$ 8,700,000
Bond issued by LCDA																																											$ 713,000,000.0
Amount transfer to restricted escrow account as storm damage reserve by corporation																																											290,000,000
Amount Transferred to Entergy Louisiana																																											412,700,000
Proceed from loan by LCDA to corporation LURC																																											702,700,000
Amount used to acquire membership interest units in wholly owned Subsidiary																																											$ 412,700,000
Class preferred, non-voting, membership interest units | shares																																											4,126,940.15
Annual distribution rate																																											9.00%
Liquidation price per unit | $ / unit																																											100
Net worth required under terms of membership interest																																											$ 1,000,000,000
Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Public Utilities, Approved Return on Equity, Percentage																							6.94%																																	6.93%					6.75%	7.13%
Amortization period of cost																																																											27 years
Earned return on common equity																																																													7.81%
Authorized Storm Damage Reserve Balance				$ 15,000,000																																																			$ 15,000,000				$ 15,000,000
Monthly storm damage provision																																																											1,750,000
Balance At Which Storm Damage Accrual Will Return To Current Level																						$ 10,000,000																																					10,000,000
Income before income taxes																																																											167,773,000		$ 150,791,000	$ 305,000
Projected under-recovery Energy Cost Recovery Rider																													$ 57,000,000																							$ 57,000,000																	$ 61,500,000
Projected Over-Recovery Energy Cost Recovery Rider							24,400,000									$ 39,600,000																																								$ 24,400,000
Regulatory Assets, Noncurrent				467,341,000											377,972,000																																								467,341,000				$ 467,341,000		377,972,000
Public Utilities, Requested Return on Equity, Percentage																																																		6.51%									6.51%
Regulatory Liability, Noncurrent				15,828,000											21,512,000																																								15,828,000				$ 15,828,000		21,512,000
Public Utilities, Requested Rate Increase (Decrease), Amount																							$ 36,800,000																																				24,600,000		10,100,000
Public Utilities, Approved Rate Increase (Decrease), Amount																																																											32,800,000		11,000,000
Redemption of Preferred Equity																											$ 21,200,000
Increase (Decrease) in Regulatory Liabilities																																																											(18,672,000)		$ (21,524,000)	(131,856,000)
Offset of Unprotected Excess ADIT Against Net Utility Plant Approved in Stipulation																																																																				$ 127,200,000
Offset of Unprotected Excess ADIT Against Other Regulatory Assets Approved in Stipulation																																																																				$ 2,200,000
Return of excess ADIT through customer bill credits																																																				25,800,000
Return of unprotected excess ADIT through sale of fuel oil inventory																																																				5,800,000
Proposed customer credits due to internal restructuring																										27,000,000			27,000,000
Regulatory asset related to costs associated with COVID-19 pandemic				19,200,000																																																			19,200,000				19,200,000
Recovery of first-year revenue requirement for certain costs of Choctaw Generating Station														$ 59,000,000
Vegetation management cost rider											22,000,000
Cap on 2019 retail revenues																																																													2.00%
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount																																																											23,800,000
Regulatory Assets				107,300,000											80,800,000																																								107,300,000				107,300,000		$ 80,800,000
Construction work in progress				134,854,000											88,373,000																																								134,854,000				134,854,000		88,373,000
Interim adjustment to energy cost recovery rider credit to customers										$ 50,000,000
Long-term debt																																																											$ 165,385,000		437,153,000	54,449,000
Entergy Gulf States Louisiana [Member] | Hurricane Rita [Member]
Regulatory Assets [Line Items]
Bond issued by LCDA																																																																								$ 278,400,000
Amount transfer to restricted escrow account as storm damage reserve by corporation																																													$ 87,000,000
Amount Transferred to Entergy Louisiana																																													187,700,000
Proceed from loan by LCDA to corporation LURC																																													274,700,000
Amount used to acquire membership interest units in wholly owned Subsidiary																																													$ 189,400,000
Class preferred, non-voting, membership interest units | shares																																													1,893,918.39
Annual distribution rate																																													10.00%
Liquidation price per unit | $ / unit																																													100
Net worth required under terms of membership interest																																													$ 1,000,000,000
Amount withdrawn from restricted escrow account as approved by units of wholly owned subsidiary																																													$ 1,700,000
Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Public Utilities, Approved Return on Equity, Percentage																																																											9.35%
Amortization period of cost																																																											27 years
Amount of Hurricane Issac storm cost to be recovered through securitization																																							$ 31,800,000
Replenishment amount for storm reserve spending																																							63,900,000
Income before income taxes																																																											$ 45,131,000		52,815,000	50,716,000
Deferred Fuel Cost				2,130,000											0																																								2,130,000				2,130,000		0
Repayment of long-term payable due to Entergy Louisiana																																																											1,838,000		1,979,000	2,077,000
Regulatory Assets, Noncurrent				266,790,000											259,363,000																																								266,790,000				266,790,000		259,363,000
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs																																							$ 3,000,000
Proposed Energy Smart Utility Performance Incentive														7.00%
Percent of Targeted Energy Smart Savings														100.00%
Public Utilities, Requested Rate Increase (Decrease), Amount													$ 45,000,000		45,000,000		$ 39,000,000
Provision for Rate Refund															10,000,000																																														10,000,000
Regulatory Assets for Rate Case Costs and Algiers Customer Migration Costs															12,000,000																																														12,000,000
Regulatory Assets for Retired General Plant Costs															10,000,000																																														10,000,000
Increase (Decrease) in Regulatory Liabilities																																																											$ (4,728,000)		(22,105,000)	(28,459,000)
Benefit to electric customers related to reduction in income tax expense under Tax Act																																	$ 8,200,000
Benefit to gas customers related to reduction in income tax expense under Tax Act																																	$ 1,300,000
New Orleans City Council Recommended Rate Reduction - Electric																								$ 33,000,000
New Orleans City Council Recommended Rate Reduction - Gas																								3,800,000
Intervenor Recommended Rate Reduction - Electric																								49,000,000
Intervenor Recommended Rate Reduction - Gas																								$ 5,000,000
Percent Equity in Proposed Common Equity Ratio																																																											51.00%
Percent Debt in Proposed Common Equity Ratio																																																											49.00%
FERC staff argued over-recovery in depreciation expense for capital additions																																																											$ 2,200,000
Regulatory asset related to costs associated with COVID-19 pandemic				$ 14,300,000																																																			$ 14,300,000				$ 14,300,000
Common Equity Tier One Capital Ratio				50.00%																																																			50.00%				50.00%
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service																																																											2.00%
Proposed public utilities, property, plant, and equipment, disclosure of composite depreciation rate for plants in service																																																											3.00%
Proposed recovery of certain rate case expenses																																																											$ 1,400,000
Opportunity Sales Refund to be Redirected to Cares Program									$ 7,000,000																																												$ 7,000,000
Non-Securitized Storm Reserves Reallocated to Cares Program									15,000,000																																												15,000,000
public utilities proposed customer credits								$ 100
Credits to customer bills resulting from City Council Cares Program				$ 3,400,000																																																			$ 3,400,000				3,400,000
Regulatory Assets				63,200,000											52,900,000																																								63,200,000				63,200,000		52,900,000
Construction work in progress				12,460,000											201,829,000																																								12,460,000				12,460,000		201,829,000
Long-term debt																																																											138,925,000		113,876,000	59,234,000
Entergy New Orleans [Member] | Hurricanes Laura, Delta, and Zeta
Regulatory Assets [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent				30,000,000																																																			30,000,000				30,000,000
Non-capital storm costs																																																	10,000,000
Total Restoration Costs For Repair and Replacement of Electrical System																																																											40,000,000
Entergy Texas [Member]
Regulatory Assets [Line Items]
Portion of requested increase in base rates associated with moving costs																																$ 48,000,000
Request filed for refund of fuel cost recovery over collections																																			$ 30,500,000
Income before income taxes																																																											218,115,000		105,501,000	135,992,000
Regulatory Assets, Noncurrent				524,713,000											512,648,000																																								524,713,000				524,713,000		512,648,000
Jurisdictional eligible fuel and purchased power expenses, net of credits																																																																	$ 1,600,000,000
Estimated deferred fuel under recovery balance for reconciliation period																		$ 25,800,000
Public Utilities, Requested Increase in Revenue Requirement																																118,000,000
Regulatory Liability, Noncurrent				32,297,000											42,085,000																																								32,297,000				32,297,000		42,085,000
Public Utilities, Requested Rate Increase (Decrease), Amount																										2,700,000						166,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount																												$ 53,200,000
Increase (Decrease) in Regulatory Liabilities																																																											(57,477,000)		(105,517,000)	(19,336,000)
Return of excess ADIT through customer bill credits																												185,200,000				185,200,000
Net book value of Neches and Sabine 2 plants																												24,500,000
Deferred Storm and Property Reserve Deficiency, Noncurrent																												20,500,000
Refund due customers resulting from lower federal income tax rate																												25,000,000				25,000,000
Capitalized skylining tree hazard costs																												6,000,000
Refund to customers of protected excess accumulated deferred taxes																												242,500,000				$ 242,500,000
Regulatory asset related to costs associated with COVID-19 pandemic				12,900,000																																																			12,900,000				12,900,000
Regulatory Assets				115,300,000											42,500,000																																								115,300,000				115,300,000		42,500,000
Construction work in progress				879,908,000											760,354,000																																								879,908,000				879,908,000		760,354,000
Replacement power costs associated with generation outages																																																																	2,000,000
Costs associated with the operation of the Spindletop natural gas storage facility																																																																	$ 24,400,000
Non-specific disallowance of fuel and purchased power expenses									$ 1,200,000
Interim fuel refund, including interest																																																	25,500,000
Long-term debt																																																											937,725,000		986,019,000	0
Entergy Texas [Member] | Hurricanes Laura, Delta, and Zeta
Regulatory Assets [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent				245,000,000																																																			245,000,000				245,000,000
Non-capital storm costs																																																	55,000,000
Total Restoration Costs For Repair and Replacement of Electrical System																																																											$ 300,000,000
Entergy Texas [Member] | Hurricane Rita [Member]
Regulatory Assets [Line Items]
Financing order authorized to issue storm cost recovery bonds																																															$ 353,000,000
Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Incremental Fuel and Replacement Energy Costs																																										$ 65,900,000
Amortization period of cost																																																											27 years
Payments to Acquire Other Property, Plant, and Equipment																																																											$ (5,988,000)		0	0
Refund to Customers Credited Through Formula Rate Plan																																																														46,600,000
Income before income taxes																																																											293,009,000		216,195,000	(44,360,000)
Regulatory Assets, Noncurrent				1,832,384,000											1,666,850,000																																								1,832,384,000				1,832,384,000		1,666,850,000
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs																																												$ 4,600,000
Public Utilities, Requested Return on Equity, Percentage	9.75%
Proposed rate reduction in revised filing																	10,100,000
Regulatory asset related to scrubber costs incurred at White Bluff plant	$ 11,200,000																			$ 11,200,000
Projected Increase in Revenue Requirement																										66,700,000					$ 169,000,000
Regulatory Liability, Noncurrent				686,872,000											559,555,000																																								686,872,000				686,872,000		559,555,000
Portion of Approved Revenue Requirement Increase Subject to Possible Future Adjustment and Refund to Customers																												$ 45,700,000
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 15,300,000																14,000,000
Redemption of Preferred Equity																																																											32,700,000
ALJ Recommended Percentage By Which Payments Be Reduced																																						20.00%
Liability Recorded Related to Estimated Payments Due Utility Operating Companies																																			35,000,000																												$ 35,000,000							$ 87,000,000
Regulatory Asset Recorded to Represent Estimate of Recoverable Retail Portion of Costs																																			31,000,000																												31,000,000							$ 75,000,000
Rate At Which Electricity Sold To Retail Customers | $ / kWh																							0.01882										0.01547			0.01164
Increase in Rate At Which Electricity Sold To Retail Customers | $ / kWh																							0.01462										0.01882			0.01547
Increase (Decrease) in Regulatory Liabilities																																																											106,878,000		39,293,000	(341,682,000)
Tax benefits to customers resulting from tax adjustment rider																																		$ 467,000,000
Projected Revenue Deficiency																																																											61,900,000		73,400,000		$ 95,600,000
Proposed customer credits due to internal restructuring																														$ 39,600,000
Refund to customers, plus interest, associated with recalculated bandwidth remedy								13,700,000
Requested revenue increase resulting from settlement agreement						$ 68,400,000
Reduced proposed revenue increase resulting from new methodology						72,600,000
Regulatory asset related to costs associated with COVID-19 pandemic				10,500,000																																																			10,500,000				10,500,000
Regulatory Assets				212,600,000											168,900,000																																								212,600,000				212,600,000		168,900,000
Construction work in progress				234,213,000											197,775,000																																								234,213,000				234,213,000		197,775,000
Energy Cost Recovery Rider Rate Per kWh																																																												$ 0.01462
Reduced proposed increase in revenue requirement to comply with annual revenue constraint						74,300,000		$ 74,300,000																							$ 65,400,000
Annual revenue constraint per rate class percentage								400.00%																							400.00%
Long-term debt																																																											$ 1,071,121,000		834,038,000	958,434,000
System Energy [Member]
Regulatory Assets [Line Items]
Earned return on common equity																																																											10.94%
Income before income taxes																																																											$ 119,674,000		114,469,000	46,434,000
Percent Interest in Grand Gulf																																																											90.00%
Annual renewal lease payments on Grand Gulf Sale-Leaseback																																																			$ 17,200,000
LPSC requested rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback																	$ 512,000,000
Reduction of previously recorded deprecation expense																																																				$ 26,000,000
Regulatory Assets, Noncurrent				538,963,000											490,083,000																																								538,963,000				$ 538,963,000		490,083,000
Regulatory Liability, Noncurrent				665,396,000											533,415,000																																								665,396,000				665,396,000		533,415,000
Increase (Decrease) in Regulatory Liabilities																																																											140,965,000		130,949,000	(156,802,000)
FERC staff argued over-recovery in depreciation expense for capital additions																			$ 32,000,000
First refund period requested authorized rate of return - LPSC									7.97%
First refund period requested authorized rate of return - MPSC and APSC									9.24%
First refund period requested authorized rate of return - FERC									9.49%
Second refund period requested authorized rate of return - MPSC and APSC									9.15%
Second refund period requested authorized rate of return - LPSC									7.78%
Second refund period requested authorized rate of return - FERC									9.09%
First refund period requested authorized rate of return									10.12%
Second refund period requested authorized rate of return									9.44%
Interest Portion of LPSC requested rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback				191,000,000																																																			191,000,000				191,000,000
Remaining NBV of Leased Assets											70,000,000
Refund of Lease Payments											$ 17,200,000
Rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback				422,000,000																																																			422,000,000				422,000,000
Interest Portion of rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback				110,000,000																																																			110,000,000				110,000,000
Refund related to depreciation expense adjustments				$ 19,000,000																																																			$ 19,000,000				$ 19,000,000
Future nuclear decommissioning costs allowed by the IRS in cost of goods sold							$ 102,000,000
Percent of requested deduction allowed by IRS of uncertain decommissioning tax postion				10.00%																																																			10.00%				10.00%
Regulatory Assets				$ 92,900,000											75,900,000																																								$ 92,900,000				$ 92,900,000		75,900,000
Construction work in progress				59,831,000											164,996,000																																								59,831,000				59,831,000		164,996,000
Additional unprotected excess ADIT related to uncertain decommissioning tax deduction								$ 147,000,000
Proposed credit of excess accumulated deferred income taxes resulting from decommissioning uncertain tax position						17,800,000																																											$ 17,800,000
Long-term debt																																																											$ 1,147,903,000		1,103,917,000	741,785,000
One-time accumulated deferred income tax credit				25,200,000
Accumulated deferred income tax credits to customers				$ 3,400,000
System Energy [Member] | First Refund Period [Member]
Regulatory Assets [Line Items]
LPSC requested authorized return on equity for System Energy in return on equity proceeding													8.44%						7.81%						7.81%
APSC/MPSC requested authorized return on equity for System Energy in return on equity proceeding													8.41%												8.24%
FERC requested authorized return on equity for System Energy in return on equity proceeding																						9.89%
APSC/MPSC revised argued authorized return on equity for System Energy in return on equity proceeding																			8.26%
FERC requested authorized return on equity for System Energy in return on equity proceeding, rebuttal													9.22%					9.40%
Requested return on equity based on alternative methodology																																																																10.26%
System Energy [Member] | Second refund period [Member]
Regulatory Assets [Line Items]
LPSC requested authorized return on equity for System Energy in return on equity proceeding													7.89%						7.97%						7.97%
APSC/MPSC requested authorized return on equity for System Energy in return on equity proceeding													8.01%												8.41%
Public utilities requested return on equity percentage, median 2nd refund period																					9.65%
Public utilities requested return on equity percentage, midpoint 2nd refund period																					9.74%
Modified public utilities requested return on equity percentage based on benchmarks, median 2nd refund period																					9.91%
Modified public utilities requested return on equity percentage based on benchmarks, midpoint 2nd refund period																					10.30%
APSC/MPSC revised argued authorized return on equity for System Energy in return on equity proceeding																			8.32%
FERC requested authorized return on equity for System Energy in return on equity proceeding, rebuttal													8.66%					9.63%
System Energy [Member] | Grand Gulf [Member]
Regulatory Assets [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																																																											11.50%
Entergy Holdings Company LLC [Member]
Regulatory Assets [Line Items]
Class preferred, non-voting, membership interest units | shares																																								2,935,152.69
Annual distribution rate																																								7.50%
Liquidation price per unit | $ / unit																																								100
Net worth required under terms of membership interest																																								$ 1,750,000,000
Minimum [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Intervenor recommended disallowance of revenue requirement										$ 300,000
Minimum [Member] | System Energy [Member]
Regulatory Assets [Line Items]
Recommended adjustment to earned return on equity																																					8.37%
Minimum [Member] | System Energy [Member] | First Refund Period [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																					10.10%				10.10%																																							8.57%
Minimum [Member] | System Energy [Member] | Second refund period [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage											8.28%														10.32%
Maximum [Member] | Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																	9.35%
Public Utilities, Approved Equity Capital Structure, Percentage																	50.00%
public utilities proposed customer credits								400
Maximum [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Intervenor recommended disallowance of revenue requirement									$ 4,100,000
Maximum [Member] | System Energy [Member]
Regulatory Assets [Line Items]
Recommended adjustment to earned return on equity																																					8.67%
Percent Equity in Proposed Common Equity Ratio																			37.00%
Percent Debt in Proposed Common Equity Ratio																			63.00%
LPSC Argued Equity Capital Structure, Percentage																			49.00%
APSC and MPSC Argued Equity Capital Structure, Percentage																			35.98%
APSC and MPSC Alternative Argued Equity Capital Structure, Percentage																			46.75%
FERC Percent Equity in Proposed Common Equity Ratio																		46.74%
FERC Percent Debt in Proposed Common Equity Ratio																		53.26%
Maximum [Member] | System Energy [Member] | First Refund Period [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																									10.70%																																							9.52%
Maximum [Member] | System Energy [Member] | Second refund period [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage											9.11%														10.69%
Montgomery County Power Station | Entergy Texas [Member]
Regulatory Assets [Line Items]
Property, Plant and Equipment, Useful Life				38 years
Attorney General Litigation Costs [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				$ 25,300,000											29,500,000																																								25,300,000				$ 25,300,000		29,500,000
Attorney General Litigation Costs [Member] | Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				25,300,000											29,500,000																																								25,300,000				25,300,000		29,500,000
Opportunity Sales [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				131,800,000											116,300,000																																								131,800,000				131,800,000		116,300,000
Opportunity Sales [Member] | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				131,800,000											116,300,000											$ 116,000,000																													131,800,000				131,800,000		116,300,000	$ 116,000,000
Nuclear Generation Development Costs [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				14,200,000											21,600,000																																								14,200,000				14,200,000		21,600,000
Nuclear Generation Development Costs [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				14,000,000.0											21,200,000																																								14,000,000.0				14,000,000.0		21,200,000
Asset Retirement Obligation Costs [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				1,018,900,000											920,400,000																																								1,018,900,000				1,018,900,000		920,400,000
Asset Retirement Obligation Costs [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				299,000,000.0											262,500,000																																								299,000,000.0				299,000,000.0		262,500,000
Asset Retirement Obligation Costs [Member] | Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				7,900,000											7,800,000																																								7,900,000				7,900,000		7,800,000
Asset Retirement Obligation Costs [Member] | Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				5,200,000											4,900,000																																								5,200,000				5,200,000		4,900,000
Asset Retirement Obligation Costs [Member] | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				479,300,000											433,000,000.0																																								479,300,000				479,300,000		433,000,000.0
Asset Retirement Obligation Costs [Member] | System Energy [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				226,300,000											210,900,000																																								226,300,000				226,300,000		210,900,000
New Orleans Power Station deferral | Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent				5,000,000.0											0																																								5,000,000.0				5,000,000.0		0
Subsequent Event [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Projected increase in revenue requirement			$ 1,200,000
Subsequent Event [Member] | Entergy Mississippi [Member]
Regulatory Assets [Line Items]
MPSC approved customer credits due to internal restructuring																																																																		$ 4,500,000
Subsequent Event [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Interim fuel refund for cumulative over-recovery			75,000,000
Subsequent Event [Member] | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Tax benefits to customers resulting from tax adjustment rider			$ 5,600,000
Reduced proposed revenue increase resulting from new methodology																																																									$ 1,000,000
Energy Cost Recovery Rider Rate Per kWh																																																										$ 0.01052
Subsequent Event [Member] | Montgomery County Power Station | Entergy Texas [Member]
Regulatory Assets [Line Items]
Current estimated cost of generation assets																																																																			$ 921,000,000
Current recoverable cost of generation assets																																																																			$ 765,000,000
Vidalia Purchased Power Agreement [Member]
Regulatory Assets [Line Items]
Regulatory Liability, Noncurrent				115,700,000											127,300,000																																								115,700,000				115,700,000		127,300,000
Increase (Decrease) in Regulatory Liabilities																																			(30,500,000)
Vidalia Purchased Power Agreement [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Regulatory Liability, Noncurrent				115,700,000											127,300,000																																								115,700,000				115,700,000		127,300,000
Louisiana Act 55 Financing Obligation [Member]
Regulatory Assets [Line Items]
Regulatory Liability, Noncurrent				144,300,000											97,100,000																																								144,300,000				144,300,000		97,100,000
Increase (Decrease) in Regulatory Liabilities																																			$ (25,000,000)
Louisiana Act 55 Financing Obligation [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Regulatory Liability, Noncurrent				144,300,000											97,100,000																																								144,300,000				144,300,000		97,100,000
Revenue Subject to Refund [Member]
Regulatory Assets [Line Items]
Regulatory Liability, Noncurrent				43,500,000											51,100,000																																								43,500,000				43,500,000		51,100,000
Revenue Subject to Refund [Member] | Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Provision recorded to reflect change in formula rate plan revenues compared to allowed rate of return															9,300,000																																														9,300,000
True-up to provision recorded to reflect change in formula rate plan revenues compared to allowed rate of return									$ 900,000			$ 800,000																																						$ 800,000			$ 900,000							$ 800,000
Regulatory Liability, Noncurrent				0											4,500,000																																								0				0		4,500,000
Revenue Subject to Refund [Member] | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Provision recorded to reflect change in formula rate plan revenues compared to allowed rate of return															35,100,000																																														35,100,000
True-up to provision recorded to reflect change in formula rate plan revenues compared to allowed rate of return																					$ 11,500,000
Regulatory Liability, Noncurrent				43,500,000											46,600,000																																								43,500,000				43,500,000		$ 46,600,000
Electricity [Member] | Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Revised Increase In Rate Base Request																													$ 135,200,000
Public Utilities, Requested Return on Equity, Percentage																													10.50%
Proposed rate reduction in revised filing																													$ 20,300,000
Return on equity including performance adder provision																													10.75%
Public Utilities, Requested Rate Increase (Decrease), Amount													$ 42,000,000		42,000,000		$ 36,000,000
Rider reductions included in decreased rates													29,000,000		29,000,000
Portion of base rate increase associated with moving costs from rider into rates																													$ 131,500,000
Proposed surcharge to recover advanced metering infrastructure costs																													7,100,000
Rate reduction due to decrease in projected fuel and energy efficiency riders																													$ 31,100,000
Natural Gas [Member] | Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																													10.75%
Proposed rate reduction in revised filing																													$ 142,000
Public Utilities, Requested Rate Increase (Decrease), Amount													$ 3,000,000		$ 3,000,000		$ 3,000,000
Transmission Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						51,000,000													$ 19,400,000
Revenue increase resulting from incremental revenue																			16,700,000																													$ 31,600,000
Public Utilities, Approved Rate Increase (Decrease), Amount																			$ 2,700,000	$ 2,700,000
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						26,300,000						23,600,000											$ 3,200,000
Revenue increase resulting from incremental revenue						16,300,000						$ 20,400,000																																										$ 6,800,000
2020 Formula Rate Plan | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																																																													9.07%
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 88,200,000
Provision for Rate Refund				43,500,000																																																			$ 43,500,000				$ 43,500,000
Projected Revenue Deficiency						44,500,000																																																							$ 23,900,000
Reduced proposed revenue increase resulting from new methodology				43,500,000
2020 Formula Rate Plan | Subsequent Event [Member] | Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Return on Equity, Percentage																																																									8.22%
Projected Revenue Deficiency																																																									$ 64,300,000
Generation Cost Recovery Rider | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 86,000,000		$ 91,000,000