Document and Entity Information
| Document and Entity Information Document | Jun. 30, 2020 |
| Written Communications | false |
| Amendment Flag | false |
| Entity File Number | 1-11299 |
| Document Type | 8-K |
| Document Period End Date | Jun. 30, 2020 |
| Entity Registrant Name | ENTERGY CORPORATION |
| Entity Tax Identification Number | 72-1229752 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 639 Loyola Avenue |
| Entity Address, City or Town | New Orleans |
| Entity Address, State or Province | LA |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 70113 |
| City Area Code | 504 |
| Local Phone Number | 576-4000 |
| Entity Central Index Key | 0000065984 |
| Entity Emerging Growth Company | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Title of 12(b) Security | Common Stock, $0.01 Par Value |
| Security Exchange Name | NYSE |
| Trading Symbol | ETR |
| CHICAGO STOCK EXCHANGE, INC [Member] | |
| Title of 12(b) Security | Common Stock, $0.01 Par Value |
| Security Exchange Name | CHX |
| Trading Symbol | ETR |
| Entergy New Orleans [Member] | |
| Entity File Number | 1-35747 |
| Entity Registrant Name | ENTERGY NEW ORLEANS, LLC |
| Entity Tax Identification Number | 82-2212934 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 1600 Perdido Street |
| Entity Address, City or Town | New Orleans |
| Entity Address, State or Province | LA |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 70112 |
| City Area Code | 504 |
| Local Phone Number | 670-3700 |
| Entity Central Index Key | 0000071508 |
| Entity Emerging Growth Company | false |
| Entergy Arkansas [Member] | |
| Entity File Number | 1-10764 |
| Entity Registrant Name | ENTERGY ARKANSAS, LLC |
| Entity Tax Identification Number | 83-1918668 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 425 West Capitol Avenue |
| Entity Address, City or Town | Little Rock |
| Entity Address, State or Province | AR |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 72201 |
| City Area Code | 501 |
| Local Phone Number | 377-4000 |
| Entity Central Index Key | 0000007323 |
| Entity Emerging Growth Company | false |
| Entergy Texas [Member] | |
| Entity File Number | 1-34360 |
| Entity Registrant Name | ENTERGY TEXAS, INC. |
| Entity Tax Identification Number | 61-1435798 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 10055 Grogans Mill Road |
| Entity Address, City or Town | The Woodlands |
| Entity Address, State or Province | TX |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 77380 |
| City Area Code | 409 |
| Local Phone Number | 981-2000 |
| Entity Central Index Key | 0001427437 |
| Entity Emerging Growth Company | false |
| Entergy Louisiana [Member] | |
| Entity File Number | 1-32718 |
| Entity Registrant Name | ENTERGY LOUISIANA, LLC |
| Entity Tax Identification Number | 47-4469646 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 4809 Jefferson Highway |
| Entity Address, City or Town | Jefferson |
| Entity Address, State or Province | LA |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 70121 |
| City Area Code | 504 |
| Local Phone Number | 576-4000 |
| Entity Central Index Key | 0001348952 |
| Entity Emerging Growth Company | false |
| System Energy [Member] | |
| Entity File Number | 1-09067 |
| Entity Registrant Name | SYSTEM ENERGY RESOURCES, INC. |
| Entity Tax Identification Number | 72-0752777 |
| Entity Incorporation, State or Country Code | AR |
| Entity Address, Address Line One | 1340 Echelon Parkway |
| Entity Address, City or Town | Jackson |
| Entity Address, State or Province | MS |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 39213 |
| City Area Code | 601 |
| Local Phone Number | 368-5000 |
| Entity Central Index Key | 0000202584 |
| Entity Emerging Growth Company | false |
| Entergy Mississippi [Member] | |
| Entity File Number | 1-31508 |
| Entity Registrant Name | ENTERGY MISSISSIPPI, LLC |
| Entity Tax Identification Number | 83-1950019 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 308 East Pearl Street |
| Entity Address, City or Town | Jackson |
| Entity Address, State or Province | MS |
| Entity Address, Country | US |
| Entity Address, Postal Zip Code | 39201 |
| City Area Code | 601 |
| Local Phone Number | 368-5000 |
| Entity Central Index Key | 0000066901 |
| Entity Emerging Growth Company | false |
| Mortgage Bonds Four Point Nine Percent Series Due Decembertwenty Fifty Two [Member] | Entergy Arkansas [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.90% Series due December 2052 |
| Security Exchange Name | NYSE |
| Trading Symbol | EAB |
| Mortgage Bonds Four Point Seven Five Percent Series Due June Two Thousand Sixty Three [Member] [Member] | Entergy Arkansas [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.75% Series due June 2063 |
| Security Exchange Name | NYSE |
| Trading Symbol | EAE |
| Four Point Eight Seven Five Percent Series First Mortgage Bonds Due September Two Thousand Sixty Six [Member] | Entergy Arkansas [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.875% Series due September 2066 |
| Security Exchange Name | NYSE |
| Trading Symbol | EAI |
| Four Point Eight Seven Five Percent Series First Mortgage Bonds Due September Two Thousand Sixty Six [Member] | Entergy Louisiana [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.875% Series due September 2066 |
| Security Exchange Name | NYSE |
| Trading Symbol | ELC |
| Mortgage Bonds Five Point Two Five Percent Series Due July Two Thousand Fifty Two [Member] | Entergy Louisiana [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 5.25% Series due July 2052 |
| Security Exchange Name | NYSE |
| Trading Symbol | ELJ |
| Mortgage Bonds Four Point Seven Percent Series Due June Two Thousand Sixty Three [Member] | Entergy Louisiana [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.70% Series due June 2063 |
| Security Exchange Name | NYSE |
| Trading Symbol | ELU |
| Mortgage Bonds, Four Point Nine Zero Percent Series, Due October Two Thousand Sixty Six [Member] | Entergy Mississippi [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 4.90% Series due October 2066 |
| Security Exchange Name | NYSE |
| Trading Symbol | EMP |
| Mortgage Bonds 5.0 Series Due December Two Thousand Fifty Two [Member] | Entergy New Orleans [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 5.0% Series due December 2052 |
| Security Exchange Name | NYSE |
| Trading Symbol | ENJ |
| Mortgage Bonds, Five Point Five Percent Series, Due April Two Thousand Sixty Six [Member] | Entergy New Orleans [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 5.50% Series due April 2066 |
| Security Exchange Name | NYSE |
| Trading Symbol | ENO |
| Five Point Six Two Five Percent Series First Mortgage Bonds Due June Two Thousand Sixty Four [Member] | Entergy Texas [Member] | |
| Title of 12(b) Security | Mortgage Bonds, 5.625% Series due June 2064 |
| Security Exchange Name | NYSE |
| Trading Symbol | EZT |
| 5.375% Series A Preferred Stock, Cumulative, No Par Value [Domain] | Entergy Texas [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Title of 12(b) Security | 5.375% Series A Preferred Stock, Cumulative, No Par Value (Liquidation Value $25 Per Share) |
| Security Exchange Name | NYSE |
| Trading Symbol | ETI/PR |