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Long - Term Debt (Schedule Of Long-term Debt Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2011
Aug. 31, 2010
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net $ (14,784) $ (13,911)    
Unamortized Debt Issuance Expense (130,612) (126,033)    
Other 12,594 12,830    
Total Long-Term Debt 16,168,312 15,075,266    
Long-term Debt, Current Maturities 650,009 760,007    
Fair Value of Long-Term Debt 15,880,239 15,367,453    
Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (989) (1,155)    
Unamortized Debt Issuance Expense (13,261) (13,723)    
Total Long-Term Debt 1,325,750 1,270,122    
Long-term Debt, Current Maturities 150,000 0    
Fair Value of Long-Term Debt 1,276,452 1,285,741    
Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net 4,408 5,307    
Unamortized Debt Issuance Expense (33,831) (34,049)    
Other 2,026 2,042    
Total Long-Term Debt 3,225,759 2,952,399    
Long-term Debt, Current Maturities 0 0    
Fair Value of Long-Term Debt 3,002,627 2,865,844    
Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (14,955) (13,877)    
Unamortized Debt Issuance Expense (57,011) (48,540)    
Other 6,544 6,570    
Total Long-Term Debt 6,805,768 6,144,071    
Long-term Debt, Current Maturities 2 675,002    
Fair Value of Long-Term Debt 6,834,134 6,389,774    
Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (168) (206)    
Unamortized Debt Issuance Expense (8,140) (8,054)    
Total Long-Term Debt 483,704 436,870    
Long-term Debt, Current Maturities 1,979 2,077    
Long Term Debt Excluding Amount Due Within One Year 481,725 434,793    
Fair Value of Long-Term Debt 491,569 455,968    
Entergy Texas [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (992) (1,498)    
Unamortized Debt Issuance Expense (9,145) (10,366)    
Other 4,022 4,214    
Total Long-Term Debt 1,513,735 1,587,150    
Long-term Debt, Current Maturities 500,000 0    
Fair Value of Long-Term Debt 1,528,828 1,661,902    
System Energy [Member]        
Debt Instrument [Line Items]        
Unamortized Premium and Discount - Net (328) (415)    
Unamortized Debt Issuance Expense (1,176) (1,455)    
Other 2 2    
Total Long-Term Debt 630,750 551,488    
Long-term Debt, Current Maturities 6 85,004    
Fair Value of Long-Term Debt $ 596,123 529,119    
Mortgage Bonds Current 2018-2022 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.86%      
Long-term Debt, Gross $ 1,875,000 $ 2,550,000    
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 7.125% 7.125%    
Mortgage Bonds 2023-2027 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.71%      
Long-term Debt, Gross $ 4,735,000 $ 4,735,000    
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 3.63%      
Long-term Debt, Gross $ 2,240,000 $ 1,125,000    
Mortgage Bonds 2028-2031 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 2.85% 2.85%    
Mortgage Bonds 2028-2031 [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.52% 3.25%    
Mortgage Bonds 2044-2066 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 4.88%      
Long-term Debt, Gross $ 3,560,000 $ 2,960,000    
Mortgage Bonds 2044-2066 [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.20% 4.70%    
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 $ 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 $ 0    
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% 0.00%    
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% 0.00%    
Long-term Debt, Gross $ 250,000 $ 0    
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% 0.00%    
Long-term Debt, Gross $ 60,000 $ 0    
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    
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    
Mortgage Bonds, Four Point Eight Seven Five Percent Series 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    
Mortgage Bonds, Four Point Eight Seven Five Percent Series 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, 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 $ 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, 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, 6.0% Series, Due May 2018 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 0.00% 6.00%    
Long-term Debt, Gross $ 0 $ 375,000    
Mortgage Bonds, 6.50%, Due September 2018 [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 0.00% 6.50%    
Long-term Debt, Gross $ 0 $ 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 $ 150,000 $ 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% 7.125%    
Long-term Debt, Gross $ 500,000 $ 500,000    
Mortgage Bonds [Member] | Entergy Mississippi [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 1,340,000 1,285,000    
Mortgage Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 2,810,000 2,560,000    
Mortgage Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 6,365,000 5,690,000    
Mortgage Bonds [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 410,000 350,000    
Mortgage Bonds [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 1,235,000 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 5.28%      
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 5.875% 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 $ 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 $ 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% 5.875%    
Long-term Debt, Gross $ 134,000 $ 134,000    
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 $ 83,680 $ 83,680    
Governmental Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 45,000 45,000    
Governmental Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 198,680 198,680    
Governmental Bonds [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 134,000 134,000    
Securitization Bonds 2018-2027 [Member]        
Debt Instrument [Line Items]        
Weighted Average Interest Rate 3.79%      
Long-term Debt, Gross $ 429,118 $ 551,499    
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 3.44%      
Long-term Debt, Gross $ 360,000 $ 345,000    
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    
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, 3.78% Series I, Due October 2018 [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 0.00% 3.78%    
Long-term Debt, Gross $ 0 $ 85,000    
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% 0.00%    
Long-term Debt, Gross $ 100,000 $ 0    
Credit Facility due May 2019, weighted avg rate 2.87% [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.48% 3.48%    
Long-term Debt, Gross $ 59,600 $ 24,900    
Credit Facility due May 2019, weighted avg rate 2.64% [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.35% 3.35%    
Long-term Debt, Gross $ 82,000 $ 36,360    
Credit Facility due May 2019, weighted avg rate 2.38% [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.44% 3.44%    
Long-term Debt, Gross $ 38,600 $ 65,650    
Credit Facility due May 2019, weighted avg rate 2.38% [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.44% 3.44%    
Long-term Debt, Gross $ 113,900 $ 50,000    
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 189,600 154,900    
Variable Interest Entity Notes Payable [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 250,600 232,010    
Variable Interest Entity Notes Payable [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 213,900 $ 135,000    
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 $ 56,910 $ 79,228    
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 $ 21,692 $ 35,764    
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 $ 65,666 $ 76,707    
Securitization Bonds, 3.65% Series Senior Secured, Due August 2019 [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.65% 3.65%    
Long-term Debt, Gross $ 0 $ 30,769    
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 $ 203,613 $ 218,600    
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 $ 81,237 $ 110,431    
Securitization Bonds [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 21,692 35,764    
Securitization Bonds [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 56,910 79,228    
Securitization Bonds [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 65,666 76,707    
Securitization Bonds [Member] | Entergy Texas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 284,850 $ 359,800    
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 3.50% 2.64%    
Long-term Debt, Gross $ 139,000 $ 103,500    
5 Year Credit Facility [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.60% 2.55%    
Long-term Debt, Gross $ 220,000 $ 210,000    
Entergy Arkansas VIE Credit Facility [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.48% 2.87%    
Long-term Debt, Gross $ 59,600 $ 24,900    
Entergy Louisiana River Bend VIE Credit Facility [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.44% 2.38%    
Long-term Debt, Gross $ 38,600 $ 65,650    
Entergy Louisiana Waterford VIE Credit Facility [Member] | Entergy Louisiana [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.35% 2.64%    
Long-term Debt, Gross $ 82,000 $ 36,360    
System Energy VIE Credit Facility [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 3.44% 2.52%    
Long-term Debt, Gross $ 113,900 $ 50,000    
Long-Term DOE Obligation [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 186,864 183,435    
Long-Term DOE Obligation [Member] | Entergy Arkansas [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 186,864 183,435    
Grand Gulf Lease Obligation [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 34,352 34,356    
Grand Gulf Lease Obligation, 5.13% [Member] | System Energy [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross 34,352 34,356    
Payable to Entergy Louisiana due November 2035 [Member] | Entergy New Orleans [Member]        
Debt Instrument [Line Items]        
Long-term Debt, Gross $ 16,346 $ 18,423