Risk Management and Fair Values Assets And Liabilities At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 60,939	$ 108,874
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	323,000	402,000
Restricted Cash and Cash Equivalents, Current	8,000	13,000
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	5,277,000	4,681,000
Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	11,000	25,000
Equity Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	24,000	24,000
Common trust funds valued using Net Asset Value [Domain]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	3,070,000	2,442,000
Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	21,000	19,000
Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		16,000
Debt Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,770,000	1,656,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	61,000	109,000
Equity Securities, FV-NI, Current	24,000	24,000
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	323,000	402,000
Restricted Cash and Cash Equivalents, Current	8,000	13,000
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	611,000	534,000
Assets, Fair Value Disclosure	1,027,000	1,095,000
Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	11,000	25,000
Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		13,000
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
Equity Securities, FV-NI, Current	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	1,159,000	1,122,000
Assets, Fair Value Disclosure	1,159,000	1,125,000
Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		3,000
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
Equity Securities, FV-NI, Current	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	0	0
Assets, Fair Value Disclosure	21,000	19,000
Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	21,000	19,000
Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		0
Entergy New Orleans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	4,437
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	78,700	75,000
Restricted Cash and Cash Equivalents, Current	2,426	2,235
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	82,200	82,400
Entergy New Orleans [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	600	1,500
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	1,100	800
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		4,400
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	78,700	75,000
Restricted Cash and Cash Equivalents, Current	2,400	2,200
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	81,100	81,600
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	600	1,500
Entergy New Orleans [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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]
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	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]
Derivative Liability	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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]
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,100	800
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Entergy New Orleans [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	1,100	800
Entergy Mississippi [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	6,600	16,953
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	700	33,500
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	8,700	51,100
Entergy Mississippi [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	10,100	24,000
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	1,400	600
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	6,600	17,000
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	700	33,500
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	7,300	50,500
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	10,100	24,000
Entergy Mississippi [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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]
Derivative Liability	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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	1,400	600
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Entergy Mississippi [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	1,400	600
Entergy Louisiana [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	517	6,295
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	243,800	293,400
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	2,361,500	2,102,600
Entergy Louisiana [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	400
Entergy Louisiana [Member] | Equity Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	14,600	16,800
Entergy Louisiana [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	1,304,700	1,037,200
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	9,800	7,300
Entergy Louisiana [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		16,500
Entergy Louisiana [Member] | Debt Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	788,100	725,100
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	500	6,300
Equity Securities, FV-NI, Current	14,600	16,800
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	243,800	293,400
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	271,700	209,400
Assets, Fair Value Disclosure	530,600	539,000
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	400
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		13,100
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
Equity Securities, FV-NI, Current	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	516,400	515,700
Assets, Fair Value Disclosure	516,400	519,100
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		3,400
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
Equity Securities, FV-NI, Current	0	0
Assets, Fair Value Disclosure [Abstract]
Replacement Reserve Escrow	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	0	0
Assets, Fair Value Disclosure	9,800	7,300
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	9,800	7,300
Entergy Louisiana [Member] | Fair Value, Inputs, Level 3 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset		0
Entergy Texas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	20,489	2,997
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	5,195	10,879
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	28,100	14,000
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	2,400	100
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	20,500	3,000
Assets, Fair Value Disclosure [Abstract]
Restricted Cash and Cash Equivalents, Current	5,200	10,900
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	25,700	13,900
Entergy Texas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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]
Liabilities, 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	2,400	100
Entergy Texas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	2,400	100
Entergy Arkansas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	3,112	3,367
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,423,100	1,213,600
Entergy Arkansas [Member] | Equity Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	6,400	4,500
Entergy Arkansas [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	910,700	724,700
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	6,000	10,300
Entergy Arkansas [Member] | Debt Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	496,900	470,700
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	3,100	3,400
Equity Securities, FV-NI, Current	6,400	4,500
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	129,900	126,800
Assets, Fair Value Disclosure	139,400	134,700
Entergy Arkansas [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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
Equity Securities, FV-NI, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	367,000	343,900
Assets, Fair Value Disclosure	367,000	343,900
Entergy Arkansas [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, 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
Equity Securities, FV-NI, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	0	0
Assets, Fair Value Disclosure	6,000	10,300
Entergy Arkansas [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Asset	6,000	10,300
System Energy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	0	2,862
Liabilities, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure	1,342,300	1,145,800
System Energy [Member] | Equity Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	2,700	2,800
System Energy [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	854,400	680,400
System Energy [Member] | Debt Securities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Decommissioning Fund Investments, Fair Value	485,200	459,700
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		2,900
Equity Securities, FV-NI, Current	2,700	2,800
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	209,500	197,500
Assets, Fair Value Disclosure	212,200	203,200
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
Equity Securities, FV-NI, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	275,700	262,200
Assets, Fair Value Disclosure	275,700	262,200
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
Equity Securities, FV-NI, Current	0	0
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities	0	0
Assets, Fair Value Disclosure	$ 0	$ 0