Risk Management and Fair Values (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 1,444,253	$ 811,279
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	7,216,000	6,740,000
Cash and Cash Equivalents, Fair Value Disclosure	1,444,000	811,000
Asset Recovery Damaged Property Costs, Noncurrent	300,269	340,460
Prepaid Expenses and Other Current Assets
Liabilities, Fair Value Disclosure [Abstract]
Other Restricted Assets, Current	10,000	4,000
Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	2,091,000	2,047,000
Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	41,000	30,000
Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	7,000	20,000
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		1,000
Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	8,000	2,000
Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,664,000	2,035,000
Cash and Cash Equivalents, Fair Value Disclosure	1,444,000	811,000
Other Restricted Assets, Current	10,000	4,000
Asset Recovery Damaged Property Costs, Noncurrent	300,000	340,000
Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	861,000	848,000
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	41,000	30,000
Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Fair Value, Inputs, Level 1 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	8,000	2,000
Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,230,000	1,199,000
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,230,000	1,199,000
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Fair Value, Inputs, Level 2 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	7,000	20,000
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	7,000	20,000
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		1,000
Fair Value, Inputs, Level 3 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value Measured at Net Asset Value Per Share
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	3,315,000	3,486,000
Entergy New Orleans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	13,892	31,403
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	89,500	118,000
Cash and Cash Equivalents, Fair Value Disclosure	13,900	31,400
Other Restricted Assets, Current	913	1,611
Asset Recovery Damaged Property Costs, Noncurrent	74,279	83,742
Entergy New Orleans [Member] | Prepaid Expenses and Other Current Assets
Liabilities, Fair Value Disclosure [Abstract]
Other Restricted Assets, Current	900	1,600
Entergy New Orleans [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	400	1,300
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	89,100	116,700
Cash and Cash Equivalents, Fair Value Disclosure	13,900	31,400
Other Restricted Assets, Current	900	1,600
Asset Recovery Damaged Property Costs, Noncurrent	74,300	83,700
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	400	1,300
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	400	1,300
Entergy Mississippi [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	598,016	155,509
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	606,400	157,100
Cash and Cash Equivalents, Fair Value Disclosure	598,000	155,500
Entergy Mississippi [Member] | Financial transmission rights
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	100	500
Entergy Mississippi [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	8,400	1,600
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	606,400	157,100
Cash and Cash Equivalents, Fair Value Disclosure	598,000	155,500
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	8,400	1,600
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	100	500
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Natural Gas Swaps
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	392,034	326,775
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,999,600	3,021,200
Cash and Cash Equivalents, Fair Value Disclosure	392,000	326,800
Asset Recovery Damaged Property Costs, Noncurrent	225,990	256,718
Entergy Louisiana [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	926,100	908,100
Entergy Louisiana [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	17,100	14,500
Entergy Louisiana [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,400	8,600
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	964,300	924,000
Cash and Cash Equivalents, Fair Value Disclosure	392,000	326,800
Asset Recovery Damaged Property Costs, Noncurrent	226,000	256,700
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	329,200	326,000
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	17,100	14,500
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	596,900	582,100
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	596,900	582,100
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	3,400	8,600
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Asset Recovery Damaged Property Costs, Noncurrent	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,400	8,600
Entergy Louisiana [Member] | Fair Value Measured at Net Asset Value Per Share
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,435,000	1,506,500
Entergy Arkansas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	54,906	3,441
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,629,100	1,616,300
Cash and Cash Equivalents, Fair Value Disclosure	54,900	3,400
Entergy Arkansas [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	590,100	579,000
Entergy Arkansas [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	19,500	12,900
Entergy Arkansas [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,000	8,500
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	340,300	276,200
Cash and Cash Equivalents, Fair Value Disclosure	54,900	3,400
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	265,900	259,900
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	19,500	12,900
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	324,200	319,100
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	324,200	319,100
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	3,000	8,500
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,000	8,500
Entergy Arkansas [Member] | Fair Value Measured at Net Asset Value Per Share
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	961,600	1,012,500
Entergy Texas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	298,015	184,706
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	307,200	189,300
Cash and Cash Equivalents, Fair Value Disclosure	298,000	184,700
Other Restricted Assets, Current	8,838	2,703
Entergy Texas [Member] | Prepaid Expenses and Other Current Assets
Liabilities, Fair Value Disclosure [Abstract]
Other Restricted Assets, Current	8,800	2,700
Entergy Texas [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	400	1,900
Entergy Texas [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	306,800	187,400
Cash and Cash Equivalents, Fair Value Disclosure	298,000	184,700
Other Restricted Assets, Current	8,800	2,700
Entergy Texas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 2 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	400	1,900
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Other Restricted Assets, Current	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial transmission rights
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	400	1,900
System Energy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	2,414	28,460
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,499,700	1,557,600
Cash and Cash Equivalents, Fair Value Disclosure	2,400	28,500
System Energy [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	574,900	559,800
System Energy [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	3,700	2,400
System Energy [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	272,100	293,300
Cash and Cash Equivalents, Fair Value Disclosure	2,400	28,500
System Energy [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	266,000	262,400
System Energy [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	3,700	2,400
System Energy [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	308,900	297,400
Cash and Cash Equivalents, Fair Value Disclosure	0	0
System Energy [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	308,900	297,400
System Energy [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
System Energy [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
System Energy [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
System Energy [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	0	0
System Energy [Member] | Fair Value Measured at Net Asset Value Per Share
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	$ 918,700	$ 966,900