Risk Management and Fair Values Assets And Liabilities At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 108,874	$ 397,615
Assets at fair value on a recurring basis
Replacement Reserve Escrow	402,000	49,000
Restricted Cash and Cash Equivalents, Current	13,000	29,000
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	4,681,000	6,005,000
Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	25,000	7,000
Equity Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	24,000	132,000
Common trust funds valued using Net Asset Value [Domain]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	2,442,000	3,205,000
Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	19,000	4,000
Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	16,000	11,000
Debt Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	1,656,000	2,177,000
Fair Value Inputs Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	109,000	398,000
Equity Securities, FV-NI	24,000	132,000
Assets at fair value on a recurring basis
Replacement Reserve Escrow	402,000	49,000
Restricted Cash and Cash Equivalents, Current	13,000	29,000
Liabilities at fair value on a recurring basis
Debt Securities	534,000	770,000
Assets, Fair Value Disclosure	1,095,000	1,384,000
Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	25,000	7,000
Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	13,000	6,000
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	0	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Debt Securities	1,122,000	1,407,000
Assets, Fair Value Disclosure	1,125,000	1,412,000
Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	3,000	5,000
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	0	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Debt Securities	0	0
Assets, Fair Value Disclosure	19,000	4,000
Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	19,000	4,000
Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Entergy New Orleans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	4,437	42,836
Assets at fair value on a recurring basis
Replacement Reserve Escrow	75,000
Restricted Cash and Cash Equivalents, Current	2,200	2,000
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	82,400	44,900
Entergy New Orleans [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	1,500	500
Entergy New Orleans [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	800	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	4,400	42,800
Assets at fair value on a recurring basis
Replacement Reserve Escrow	75,000
Restricted Cash and Cash Equivalents, Current	2,200	2,000
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	81,600	44,800
Entergy New Orleans [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	1,500	500
Entergy New Orleans [Member] | Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	0	0
Entergy New Orleans [Member] | Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Entergy New Orleans [Member] | Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	800	100
Entergy New Orleans [Member] | Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Entergy New Orleans [Member] | Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	800	100
Entergy Mississippi [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	16,953	47,598
Assets at fair value on a recurring basis
Replacement Reserve Escrow	33,500	48,900
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	51,100	96,800
Entergy Mississippi [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	24,000	6,700
Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	600	300
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	17,000	47,600
Assets at fair value on a recurring basis
Replacement Reserve Escrow	33,500	48,900
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	50,500	96,500
Entergy Mississippi [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	24,000	6,700
Entergy Mississippi [Member] | Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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 at fair value on a recurring basis
Replacement Reserve Escrow	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	0	0
Entergy Mississippi [Member] | Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Entergy Mississippi [Member] | Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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 at fair value on a recurring basis
Replacement Reserve Escrow	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	600	300
Entergy Mississippi [Member] | Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts [Member]
Liabilities at fair value on a recurring basis
Derivative Liability	0	0
Entergy Mississippi [Member] | Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	600	300
Entergy Louisiana [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	6,295	18,378
Assets at fair value on a recurring basis
Replacement Reserve Escrow	293,400
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	2,102,600	2,144,500
Entergy Louisiana [Member] | Equity Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	16,800	20,200
Entergy Louisiana [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	1,037,200	1,300,100
Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	7,300	600
Entergy Louisiana [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	16,500	11,000
Entergy Louisiana [Member] | Debt Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	725,100	794,200
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	6,300	18,400
Equity Securities, FV-NI	16,800	20,200
Assets at fair value on a recurring basis
Replacement Reserve Escrow	293,400
Liabilities at fair value on a recurring basis
Debt Securities	209,400	262,600
Assets, Fair Value Disclosure	539,000	306,900
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	13,100	5,700
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	0	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0
Liabilities at fair value on a recurring basis
Debt Securities	515,700	531,600
Assets, Fair Value Disclosure	519,100	536,900
Entergy Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Entergy Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	3,400	5,300
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	0	0
Assets at fair value on a recurring basis
Replacement Reserve Escrow	0
Liabilities at fair value on a recurring basis
Debt Securities	0	0
Assets, Fair Value Disclosure	7,300	600
Entergy Louisiana [Member] | Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	7,300	600
Entergy Louisiana [Member] | Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts Assets [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	0	0
Entergy Texas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	2,997	0
Assets at fair value on a recurring basis
Restricted Cash and Cash Equivalents, Current	10,900	26,600
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	14,000	27,400
Entergy Texas [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	100	800
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	3,000
Assets at fair value on a recurring basis
Restricted Cash and Cash Equivalents, Current	10,900	26,600
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	13,900	26,600
Entergy Texas [Member] | Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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
Assets at fair value on a recurring basis
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	0	0
Entergy Texas [Member] | Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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
Assets at fair value on a recurring basis
Restricted Cash and Cash Equivalents, Current	0	0
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	100	800
Entergy Texas [Member] | Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	100	800
Entergy Arkansas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	3,367	4,760
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	1,213,600	1,445,500
Entergy Arkansas [Member] | Equity Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	4,500	16,700
Entergy Arkansas [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	724,700	895,400
Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	10,300	2,300
Entergy Arkansas [Member] | Debt Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	470,700	526,300
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	3,400	4,800
Equity Securities, FV-NI	4,500	16,700
Liabilities at fair value on a recurring basis
Debt Securities	126,800	119,500
Assets, Fair Value Disclosure	134,700	141,000
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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	0	0
Liabilities at fair value on a recurring basis
Debt Securities	343,900	406,800
Assets, Fair Value Disclosure	343,900	406,800
Entergy Arkansas [Member] | Fair Value Inputs Level 2 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
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	0	0
Liabilities at fair value on a recurring basis
Debt Securities	0	0
Assets, Fair Value Disclosure	10,300	2,300
Entergy Arkansas [Member] | Fair Value Inputs Level 3 [Member] | Financial Transmission Rights (FTRs) [Member]
Liabilities at fair value on a recurring basis
Derivative Asset	10,300	2,300
System Energy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	2,862	89,114
Liabilities at fair value on a recurring basis
Assets, Fair Value Disclosure	1,145,800	1,474,400
System Energy [Member] | Equity Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	2,800	12,900
System Energy [Member] | Common trust funds valued using Net Asset Value [Domain]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	680,400	847,900
System Energy [Member] | Debt Securities [Member]
Liabilities at fair value on a recurring basis
Decommissioning Trust Fair Values	459,700	524,500
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	89,100
Equity Securities, FV-NI	2,800	12,900
Liabilities at fair value on a recurring basis
Debt Securities	197,500	273,000
Assets, Fair Value Disclosure	203,200	375,000
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	0
Equity Securities, FV-NI	0	0
Liabilities at fair value on a recurring basis
Debt Securities	262,200	251,500
Assets, Fair Value Disclosure	262,200	251,500
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	0
Equity Securities, FV-NI	0	0
Liabilities at fair value on a recurring basis
Debt Securities	0	0
Assets, Fair Value Disclosure	$ 0	$ 0