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Long - Term Debt (Schedule Of Long-term Debt Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2011
Aug. 31, 2010
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage   3.34%    
Unamortized Premium and Discount - Net $ (16,124) $ (14,784)    
Unamortized Debt Issuance Expense (143,502) (130,612)    
Other 12,096 12,594    
Total Long-Term Debt 17,873,655 16,168,312    
Long-term Debt, Current Maturities 795,012 650,009    
Long-term Debt, Excluding Current Maturities 17,078,643 15,518,303    
Fair Value of Long-Term Debt 19,059,950 16,101,455    
Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net 6,127 (989)    
Unamortized Debt Issuance Expense (16,998) (13,261)    
Total Long-Term Debt 1,614,129 1,325,750    
Long-term Debt, Current Maturities 0 150,000    
Long-term Debt, Excluding Current Maturities 1,614,129 1,175,750    
Fair Value of Long-Term Debt 1,709,505 1,276,452    
Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net 1,664 4,408    
Unamortized Debt Issuance Expense (34,936) (33,831)    
Other 2,007 2,026    
Total Long-Term Debt 3,517,208 3,225,759    
Long-term Debt, Current Maturities 0 0    
Long-term Debt, Excluding Current Maturities 3,517,208 3,225,759    
Fair Value of Long-Term Debt 3,747,914 3,189,491    
Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (17,372) (14,955)    
Unamortized Debt Issuance Expense (58,089) (57,011)    
Other 6,065 6,544    
Total Long-Term Debt 7,303,669 6,805,768    
Long-term Debt, Current Maturities 320,002 2    
Long-term Debt, Excluding Current Maturities 6,983,667 6,805,766    
Fair Value of Long-Term Debt 7,961,168 6,834,134    
Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (129) (168)    
Unamortized Debt Issuance Expense (7,775) (8,140)    
Total Long-Term Debt 560,906 483,704    
Long-term Debt, Current Maturities 25,000 0    
Long-term Debt, Excluding Current Maturities 521,539 467,358    
Long Term Debt Excluding Amount Due Within One Year 534,068 481,725    
Fair Value of Long-Term Debt 523,846 491,569    
Long-term debt and notes payable related parties, current 26,838      
Notes Payable, Related Parties, Current 1,838 1,979    
Entergy Texas [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (4,814) (992)    
Unamortized Debt Issuance Expense (17,510) (9,145)    
Other 4,022 4,022    
Total Long-Term Debt 1,922,956 1,513,735    
Long-term Debt, Current Maturities 0 500,000    
Long-term Debt, Excluding Current Maturities 1,922,956 1,013,735    
Fair Value of Long-Term Debt 2,090,215 1,528,828    
System Energy [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (144) (328)    
Unamortized Debt Issuance Expense (1,697) (1,176)    
Other 2 2    
Total Long-Term Debt 548,107 630,750    
Long-term Debt, Current Maturities 10 6    
Long-term Debt, Excluding Current Maturities 548,097 630,744    
Fair Value of Long-Term Debt $ 565,209 630,475    
Mortgage Bonds Current 2018-2022 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.65%      
Long-term Debt, Gross $ 2,400,000 $ 3,050,000    
Mortgage Bonds Current 2018-2022 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.55% 2.55%    
Mortgage Bonds Current 2018-2022 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.10% 7.125%    
Mortgage Bonds 2023-2027 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.59%      
Long-term Debt, Gross $ 4,610,000 $ 4,610,000    
Mortgage Bonds 2023-2027 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.40% 2.40%    
Mortgage Bonds 2023-2027 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.59% 5.59%    
Mortgage Bonds 2028-2031 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 4.05%      
Long-term Debt, Gross $ 1,890,000 $ 1,190,000    
Mortgage Bonds 2028-2031 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.05% 3.05%    
Mortgage Bonds 2028-2031 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.52% 4.52%    
Mortgage Bonds 2044-2066 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 4.63%      
Long-term Debt, Gross $ 5,170,000 $ 3,560,000    
Mortgage Bonds 2044-2066 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.55% 4.20%    
Mortgage Bonds 2044-2066 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.625% 5.625%    
Mortgage Bonds 2.40% Series Due October 2026 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.40% 2.40%    
Long-term Debt, Gross $ 400,000 $ 400,000    
Mortgage Bonds, 2.55% Series Due June 2021 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.55% 2.55%    
Long-term Debt, Gross $ 125,000 $ 125,000    
Mortgage Bonds 2.85% Series Due June 2028 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.85% 2.85%    
Long-term Debt, Gross $ 375,000 $ 375,000    
Mortgage Bonds 4.52% Series Due December 2038 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.52% 0.00%    
Long-term Debt, Gross $ 55,000 $ 55,000    
Mortgage bonds, 3.85% Series due June 2049 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.85%      
Long-term Debt, Gross $ 435,000 $ 0    
Mortgage Bonds Three Point Zero Five Percent Series Due June Two Thousand Thirty One [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.05% 3.05%    
Long-term Debt, Gross $ 325,000 $ 325,000    
Mortgage Bonds 4.0% Series Due March 2033 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.00% 0.00%    
Long-term Debt, Gross $ 750,000 $ 750,000    
Mortgage Bonds, 3.05% Series, Due June 2023 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.05% 3.05%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 3.1% Series, Due July 2023 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.10% 3.10%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 3.12% Series, Due September 2027 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.12% 0.00%    
Long-term Debt, Gross $ 450,000 $ 450,000    
Mortgage Bonds, 3.25% Series, Due April 2028 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.25% 3.25%    
Long-term Debt, Gross $ 425,000 $ 425,000    
Mortgage Bonds, 3.25% Series, Due December 2027 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.25% 3.25%    
Long-term Debt, Gross $ 150,000 $ 150,000    
Mortgage Bonds, 3.3% Series, Due December 2022 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.30% 3.30%    
Long-term Debt, Gross $ 200,000 $ 200,000    
Three Point Five Percent Series First Mortgage Bonds Due April Two Thousand Twenty Six [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.50% 3.50%    
Long-term Debt, Gross $ 600,000 $ 600,000    
4.0% Series First Mortgage Bonds Due June 2028 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.00% 4.00%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 3.75% Series, Due February 2021 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.75% 3.75%    
Long-term Debt, Gross $ 350,000 $ 350,000    
Mortgage Bonds, 3.75% Series, Due July 2024 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.75% 3.75%    
Long-term Debt, Gross $ 100,000 $ 100,000    
Mortgage Bonds 3.7% Series, Due June 2024 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.70% 3.70%    
Long-term Debt, Gross $ 375,000 $ 375,000    
Mortgage Bonds, 3.78% Series, Due April 2025 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.78% 3.78%    
Long-term Debt, Gross $ 110,000 $ 110,000    
Mortgage Bonds, 3.78 % Series Due April 2025 (Legacy) [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.78% 3.78%    
Long-term Debt, Gross $ 190,000 $ 190,000    
Mortgage Bonds, 3.9% Series, Due July 2023 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.90% 3.90%    
Long-term Debt, Gross $ 100,000 $ 100,000    
Mortgage Bonds, 3.95% Series, Due October 2020 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.95% 3.95%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 4.0% Series, Due June 2026 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.00% 4.00%    
Long-term Debt, Gross $ 85,000 $ 85,000    
Mortgage Bonds, 4.51% Series Due September 2033 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.51% 4.51%    
Long-term Debt, Gross $ 60,000 $ 60,000    
Mortgage Bonds, 4.05% Series, Due September 2023 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.05% 4.05%    
Long-term Debt, Gross $ 325,000 $ 325,000    
Mortgage Bonds, Four Point Nine Zero Percent Series, Due October Two Thousand Sixty Six [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.90% 4.90%    
Long-term Debt, Gross $ 260,000 $ 260,000    
Mortgage Bonds, 4.1% Series, Due April 2023 [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.10% 4.10%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 4.1% Series, Due September 2021 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.10% 4.10%    
Long-term Debt, Gross $ 75,000 $ 75,000    
Mortgage Bonds, Three Point Four Five Percent Series, Due December Two Thousand Twenty Seven [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.45% 3.45%    
Mortgage Bonds 3.45% Series Due December 2027 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 150,000 $ 150,000    
4.0% Series First Mortgage Bonds Due March 2029 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.00%      
Long-term Debt, Gross $ 300,000 0    
4.50% Series First Mortgage Bonds Due March 2039 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.50%      
Long-term Debt, Gross $ 400,000 $ 0    
Mortgage Bonds, 4.44% Series, Due January 2026 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.44% 4.44%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds, 4.7% Series, Due June 2063 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.70% 4.70%    
Long-term Debt, Gross $ 100,000 $ 100,000    
Mortgage Bonds, 4.75% Series, Due June 2063 [Member] [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.75% 4.75%    
Long-term Debt, Gross $ 125,000 $ 125,000    
Mortgage Bonds, 4.8% Series, Due May 2021 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.80% 4.80%    
Long-term Debt, Gross $ 200,000 $ 200,000    
Four Point Eight Seven Five Percent Series First Mortgage Bonds Due September Two Thousand Sixty Six [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.875% 4.875%    
Long-term Debt, Gross $ 410,000 $ 410,000    
Four Point Eight Seven Five Percent Series First Mortgage Bonds Due September Two Thousand Sixty Six [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.875% 4.875%    
Long-term Debt, Gross $ 270,000 $ 270,000    
Mortgage Bonds, 4.9% Series, Due December 2052 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.90% 4.90%    
Long-term Debt, Gross $ 200,000 $ 200,000    
Mortgage Bonds, 4.95% Series, Due December 2044 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.95% 4.95%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds Four Point Two Percent Series Due April 2049 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.20%      
Long-term Debt, Gross $ 350,000 $ 0    
Mortgage Bonds, 4.95% Series, Due January 2045 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.95% 4.95%    
Long-term Debt, Gross $ 450,000 $ 450,000    
Mortgage Bonds, 4.2% Series, Due September 2048 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.20% 0.00%    
Long-term Debt, Gross $ 600,000 $ 600,000    
Mortgage Bonds, Four Point Two Zero Percent Series due April Twenty Fifty [Member] [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.20%      
Long-term Debt, Gross $ 525,000 $ 0    
Mortgage Bonds, 5.0% Series, Due July 2044 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.00% 5.00%    
Long-term Debt, Gross $ 170,000 $ 170,000    
Mortgage Bonds, 5.0% Series, Due December 2052 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.00% 5.00%    
Long-term Debt, Gross $ 30,000 $ 30,000    
Mortgage Bonds Five Point One Five Percent Series Due June Two Thousand Forty Five [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.15% 5.15%    
Long-term Debt, Gross $ 250,000 $ 250,000    
Mortgage Bonds 3.55% Series Due September 2049 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.55%      
Long-term Debt, Gross $ 300,000 $ 0    
Mortgage Bonds, 5.10% Series, Due December 2020 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.10% 5.10%    
Long-term Debt, Gross $ 25,000 $ 25,000    
Mortgage Bonds, 5.25% Series, Due July 2052 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.25% 5.25%    
Long-term Debt, Gross $ 200,000 $ 200,000    
Mortgage Bonds, 5.40% Series, Due November 2024 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.40% 5.40%    
Long-term Debt, Gross $ 400,000 $ 400,000    
Mortgage Bonds, 5.5% Series, Due April 2066 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.50% 5.50%    
Long-term Debt, Gross $ 110,000 $ 110,000    
Mortgage Bonds, 5.625% Series, Due June 2064 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.625% 5.625%    
Long-term Debt, Gross $ 135,000 $ 135,000    
Mortgage Bonds, 5.59% Series, Due October 2024 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.59% 5.59%    
Long-term Debt, Gross $ 300,000 $ 300,000    
Mortgage Bonds, 6.64% Series, Due July 2019 [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 6.64% 6.64%    
Long-term Debt, Gross $ 0 $ 150,000    
Mortgage Bonds, 7.125% Series, Due February 2019 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage   7.125%    
Long-term Debt, Gross 0 $ 500,000    
Mortgage Bonds [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 1,625,000 1,340,000    
Mortgage Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 3,160,000 2,810,000    
Mortgage Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 6,890,000 6,365,000    
Mortgage Bonds [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 410,000 410,000    
Mortgage Bonds [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 1,735,000 1,235,000    
Mortgage Bonds [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 250,000 $ 250,000    
Governmental Bonds 2017-2022 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 2.48%      
Debt Instrument, Interest Rate, Stated Percentage   2.375%    
Long-term Debt, Gross $ 179,000 $ 179,000    
Governmental Bonds 2017-2022 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.375%      
Governmental Bonds 2017-2022 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.50% 5.875%    
Governmental Bonds 2028-2030 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.45%      
Long-term Debt, Gross $ 198,680 $ 198,680    
Governmental Bonds 2028-2030 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.375% 3.375%    
Governmental Bonds 2028-2030 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.50% 3.50%    
Governmental Bonds Two Point Three Seven Five Percent Series Due Two Thousand Twenty One Independence County [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross [1],[2] $ 45,000 $ 45,000    
Governmental Bonds Two Point Three Seven Five Percent Series Due Two Thousand Twenty One Independence County [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.375% 2.375%    
Governmental Bonds, 3.50% Series, Due 2030, Louisiana Public Facilities Authority [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.50% 3.50%    
Long-term Debt, Gross [1],[2] $ 115,000 $ 115,000    
Governmental Bonds, 5.875% Series, Due 2022, Mississippi Business Finance Corp. [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage   5.875%    
Long-term Debt, Gross [1] $ 0 $ 134,000    
Governmental Bonds 2.5% Percent Series Due 2022 Mississippi Business Finance Corporation [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.50%      
Long-term Debt, Gross [1] $ 134,000 $ 0    
Governmental Bonds, 3.375% Series, Due 2028, Louisiana Public Facilities Authority [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.375% 3.375%    
Long-term Debt, Gross [1],[2] $ 83,680 $ 83,680    
Governmental Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross [1] 45,000 45,000    
Governmental Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross [1] 198,680 198,680    
Governmental Bonds [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross [1] $ 134,000 134,000    
Securitization Bonds 2018-2027 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.73%      
Long-term Debt, Gross $ 302,145 $ 429,118    
Securitization Bonds 2018-2027 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.04% 2.04%    
Securitization Bonds 2018-2027 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.93% 5.93%    
VIE Notes Payable 2017-2023 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.41%      
Long-term Debt, Gross $ 360,000 $ 360,000    
VIE Notes Payable 2017-2023 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.17% 3.17%    
VIE Notes Payable 2017-2023 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.92% 3.92%    
Variable Interest Entity Notes Payable, 3.17% Series M, Due December 2023 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.17% 3.17%    
Long-term Debt, Gross $ 40,000 $ 40,000    
Variable Interest Entity Notes Payable, 3.22 % Series I, Due December 2023 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.22% 3.22%    
Long-term Debt, Gross $ 20,000 $ 20,000    
Credit Facility due September 2021, weighted avg rate 3.23% [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.23% 3.23%    
Long-term Debt, Gross $ 70,300 $ 38,600    
Variable Interest Entity Notes Payable, 3.38% Series R, Due August 2020 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.38% 3.38%    
Long-term Debt, Gross $ 70,000 $ 70,000    
Variable Interest Entity Notes Payable, 3.65% Series L, Due July 2021 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.65% 3.65%    
Long-term Debt, Gross $ 90,000 $ 90,000    
Variable Interest Entity Notes Payable, 3.42% Series J Due April 2021 [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.42% 3.42%    
Long-term Debt, Gross $ 100,000 $ 100,000    
Credit Facility due May 2019, weighted avg rate 2.87% [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.33% 3.33%    
Long-term Debt, Gross $ 15,100 $ 59,600    
Credit Facility due September 2021, weighted avg rate 3.30% [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.30% 3.30%    
Long-term Debt, Gross $ 49,900 $ 82,000    
Credit Facility due September 2021, weighted avg rate 3.23% [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.34%      
Long-term Debt, Gross $ 31,600 $ 113,900    
Variable Interest Entity Notes Payable, Three Point Ninety Two Percent Series H Due February Two Thousand Twenty One [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.92% 3.92%    
Long-term Debt, Gross $ 40,000 $ 40,000    
Variable Interest Entity Notes Payable [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 145,100 189,600    
Variable Interest Entity Notes Payable [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 250,200 250,600    
Variable Interest Entity Notes Payable [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 131,600 $ 213,900    
Securitization Bonds, 2.04% Series Senior Secured, Due September 2023 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.04% 2.04% 2.04%  
Long-term Debt, Gross $ 34,185 $ 56,910    
Securitization Bonds, 2.30% Series Senior Secured, Due August 2021 [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.30% 2.30%   2.30%
Long-term Debt, Gross $ 7,259 $ 21,692    
Securitization Bonds, 2.67% Series Senior Secured, Due June 2024 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.67% 2.67%    
Long-term Debt, Gross $ 54,443 $ 65,666    
Securitization Bonds, 4.38% Series Senior Secured, Due November 2023 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.38% 4.38%    
Long-term Debt, Gross $ 155,969 $ 203,613    
Securitization Bonds, 5.93% Series Senior Secured, Series A, Due June 2022 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.93% 5.93%    
Long-term Debt, Gross $ 50,289 $ 81,237    
Securitization Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 7,259 21,692    
Securitization Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 34,185 56,910    
Securitization Bonds [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 54,443 65,666    
Securitization Bonds [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 206,258 $ 284,850    
3.0% Unsecured Term Loan due May 2022 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.00% 0.00%    
Long-term Debt, Gross $ 70,000 $ 0    
Entergy Corporation Notes Due September 2020 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 5.125% 5.125%    
Long-term Debt, Gross $ 450,000 $ 450,000    
Entergy Corporation Notes Due July Two Thousand Twenty Two [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.00% 4.00%    
Long-term Debt, Gross $ 650,000 $ 650,000    
Entergy Corporation Notes Due September Two Thousand Twenty Six [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.95% 2.95%    
Long-term Debt, Gross $ 750,000 $ 750,000    
Vermont Yankee Credit Facility [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.93% 3.50%    
Long-term Debt, Gross $ 139,000 $ 139,000    
5 Year Credit Facility [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.77% 3.60%    
Long-term Debt, Gross $ 440,000 $ 220,000    
Entergy Arkansas VIE Credit Facility [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.33% 3.48%    
Long-term Debt, Gross $ 15,100 $ 59,600    
Entergy Louisiana River Bend VIE Credit Facility [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.23% 3.44%    
Long-term Debt, Gross $ 70,300 $ 38,600    
Entergy Louisiana Waterford VIE Credit Facility [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.30% 3.35%    
Long-term Debt, Gross $ 49,900 $ 82,000    
System Energy VIE Credit Facility [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.34% 3.44%    
Long-term Debt, Gross $ 31,600 $ 113,900    
Long-Term DOE Obligation [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 191,114 186,864    
Long-Term DOE Obligation [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross [3] 191,114 186,864    
Grand Gulf Lease Obligation [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 34,346 34,352    
Grand Gulf Lease Obligation, 5.13% [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 34,346 34,352    
Payable to Entergy Louisiana due November 2035 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 14,367 $ 16,346    
Credit Facility due November 2021, weighted avg rate 2.92% [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.92% 0.00%    
Long-term Debt, Gross $ 20,000 $ 0    
[1]
(a)
Consists of pollution control revenue bonds and environmental revenue bonds.
[2]
(c)
The bonds are secured by a series of collateral mortgage bonds.
[3]
(b)
Pursuant to the Nuclear Waste Policy Act of 1982, Entergy’s nuclear owner/licensee subsidiaries have contracts with the DOE for spent nuclear fuel disposal service.  The contracts include a one-time fee for generation prior to April 7, 1983.  Entergy Arkansas is the only Entergy company that generated electric power with nuclear fuel prior to that date and includes the one-time fee, plus accrued interest, in long-term debt.