Rate And Regulatory Matters Rate and Regulatory Matters (Details of Other Regulatory Liabilities Included in Entergy Corporation and Subsidiaries) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%					35.00%	35.00%
Regulatory Liability, Noncurrent			$ 2,643,845	$ 2,323,851
Increase (Decrease) in Regulatory Liabilities			(43,631)	(238,669)	$ 14,781
Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			1,993,300	1,694,100
Asset Retirement Obligation Costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			45,500	29,700
Vidalia Purchased Power Agreement [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			106,200	115,700
Increase (Decrease) in Regulatory Liabilities		$ 30,500
Entergy Arkansas’s Accumulated Accelerated Grand Gulf Amortization [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			44,400	44,400
Revenue Subject to Refund [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			0	43,500
Internal Restructuring Guaranteed Credits to Customers [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			19,800	26,400
Other Regulatory Assets (Liabilities) [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			83,700	53,500
Grand Gulf Sale Leaseback [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			55,600	55,600
Business Combination Guaranteed Customer Benefits [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			16,000	21,500
Grand Gulf Over-Recovery [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			126,500	75,100
Louisiana Act 55 Financing Obligation [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			127,400	144,300
Increase (Decrease) in Regulatory Liabilities		$ 25,000
Advanced Metering System Surcharge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			7,300	20,100
Deferred Tax Equity Partnership Earnings
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			18,100	$ 0
Entergy Louisiana [Member]
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Regulatory Liability, Noncurrent			1,042,597	$ 918,293
Increase (Decrease) in Regulatory Liabilities			16,478	(71,698)	35,881
Entergy Louisiana [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			692,200	567,700
Entergy Louisiana [Member] | Asset Retirement Obligation Costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			45,500	29,700
Entergy Louisiana [Member] | Vidalia Purchased Power Agreement [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			106,200	115,700
Entergy Louisiana [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			13,200	3,400
Entergy Louisiana [Member] | Business Combination Guaranteed Customer Benefits [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			16,000	21,500
Entergy Louisiana [Member] | Grand Gulf Over-Recovery [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			30,700	36,000
Entergy Louisiana [Member] | Louisiana Act 55 Financing Obligation [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			127,400	144,300
Entergy Louisiana [Member] | Derivative Instruments & Hedging Activities
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			11,400	0
Entergy Arkansas [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			743,314	686,872
Increase (Decrease) in Regulatory Liabilities			(21,066)	(106,878)	(39,293)
Entergy Arkansas [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			685,400	597,400
Entergy Arkansas [Member] | Revenue Subject to Refund [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			0	43,500
Entergy Arkansas [Member] | Internal Restructuring Guaranteed Credits to Customers [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			19,800	26,400
Entergy Arkansas [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			1,100	0
Entergy Arkansas [Member] | Grand Gulf Over-Recovery [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			18,900	19,600
Entergy Arkansas [Member] | Deferred Tax Equity Partnership Earnings
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			18,100	0
Entergy Mississippi [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			49,313	15,828
Increase (Decrease) in Regulatory Liabilities			(21,930)	18,672	21,524
Entergy Mississippi [Member] | Grand Gulf Over-Recovery [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			15,100	1,000
Entergy Mississippi [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			0	600
Entergy Mississippi [Member] | Grand Gulf Over-Recovery [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			34,200	14,200
Entergy New Orleans [Member]
Regulatory Liabilities [Line Items]
Increase (Decrease) in Regulatory Liabilities			(4,985)	4,728	22,105
Entergy Texas [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			37,060	32,297
Increase (Decrease) in Regulatory Liabilities			28,747	57,477	105,517
Entergy Texas [Member] | Transition to Competition Costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			0	3,200
Entergy Texas [Member] | Other Regulatory Assets (Liabilities) [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			4,300	2,500
Entergy Texas [Member] | Income Tax Rate Change [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			2,700	6,500
Entergy Texas [Member] | Advanced Metering System Surcharge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			7,300	20,100
Entergy Texas [Member] | Retail refunds
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			22,800	0
System Energy [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			744,944	665,396
Increase (Decrease) in Regulatory Liabilities			(40,884)	(140,965)	$ (130,949)
System Energy [Member] | Unrealized Gain on Nuclear Decommissioning Trust Funds [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			615,700	529,000
System Energy [Member] | Entergy Arkansas’s Accumulated Accelerated Grand Gulf Amortization [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			44,400	44,400
System Energy [Member] | Entergy Mississippi’s accumulated accelerated Grand Gulf amortization [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			3,600	10,700
System Energy [Member] | Grand Gulf Sale Leaseback [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			55,600	55,600
System Energy [Member] | Grand Gulf Sale Leaseback accumulated deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent			$ 25,600	$ 25,700