Risk Management and Fair Values (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 1,272,314	$ 60,939
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	4,000
Replacement Reserve Escrow	333,000	323,000
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	6,923,000	5,277,000
Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	2,000	11,000
Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,922,000	1,770,000
Common trust funds valued using Net Asset Value [Domain]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	3,289,000	3,070,000
Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	49,000	21,000
Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	54,000	24,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	1,272,000	61,000
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	4,000	8,000
Replacement Reserve Escrow	333,000	323,000
Equity Securities, FV-NI, Current	54,000	24,000
Debt Securities	721,000	611,000
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,384,000	1,027,000
Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	2,000	11,000
Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Replacement Reserve Escrow	0	0
Equity Securities, FV-NI, Current	0	0
Debt Securities	1,201,000	1,159,000
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,201,000	1,159,000
Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Replacement Reserve Escrow	0	0
Equity Securities, FV-NI, Current	0	0
Debt Securities	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	49,000	21,000
Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	49,000	21,000
Entergy New Orleans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	6,532	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	1,306	2,426
Replacement Reserve Escrow	81,700	78,700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	92,100	82,200
Entergy New Orleans [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		600
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,600	1,100
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	6,500
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	1,300	2,400
Replacement Reserve Escrow	81,700	78,700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	89,500	81,100
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		600
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,600	1,100
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,600	1,100
Entergy Mississippi [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	3,083	6,600
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	800	700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	7,500	8,700
Entergy Mississippi [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	1,500	10,100
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,600	1,400
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	3,100	6,600
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	800	700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	3,900	7,300
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	1,500	10,100
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	3,600	1,400
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,600	1,400
Entergy Louisiana [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	185,307	517
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	250,400	243,800
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,747,700	2,361,500
Entergy Louisiana [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		400
Entergy Louisiana [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	812,600	788,100
Entergy Louisiana [Member] | Common trust funds valued using Net Asset Value [Domain]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,461,000	1,304,700
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	19,800	9,800
Entergy Louisiana [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	18,600	14,600
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	185,300	500
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	250,400	243,800
Equity Securities, FV-NI, Current	18,600	14,600
Debt Securities	293,700	271,700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	748,000	530,600
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		400
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Equity Securities, FV-NI, Current	0	0
Debt Securities	518,900	516,400
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	518,900	516,400
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Equity Securities, FV-NI, Current	0	0
Debt Securities	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	19,800	9,800
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure on Recurring Basis		0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	19,800	9,800
Entergy Arkansas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	772,164	3,112
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,310,800	1,423,100
Entergy Arkansas [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	554,400	496,900
Entergy Arkansas [Member] | Common trust funds valued using Net Asset Value [Domain]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	935,000	910,700
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	16,100	6,000
Entergy Arkansas [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	33,100	6,400
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	772,200	3,100
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	33,100	6,400
Debt Securities	165,100	129,900
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	970,400	139,400
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	0	0
Debt Securities	389,300	367,000
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	389,300	367,000
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	0	0
Debt Securities	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	16,100	6,000
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	16,100	6,000
Entergy Texas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	124,880	20,489
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	2,340	5,195
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	133,800	28,100
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	6,600	2,400
Entergy Texas [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	124,900	20,500
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	2,300	5,200
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	127,200	25,700
Entergy Texas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Texas [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	0
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	6,600	2,400
Entergy Texas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	6,600	2,400
System Energy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	30,838	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,481,100	1,342,300
System Energy [Member] | Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	554,600	485,200
System Energy [Member] | Common trust funds valued using Net Asset Value [Domain]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	893,700	854,400
System Energy [Member] | Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	2,000	2,700
System Energy [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	30,800
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	2,000	2,700
Debt Securities	262,300	209,500
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	295,100	212,200
System Energy [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	0	0
Debt Securities	292,300	275,700
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	292,300	275,700
System Energy [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI, Current	0	0
Debt Securities	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	$ 0	0
Entergy Corporation [Member]
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current		$ 8,000