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Rate And Regulatory Matters Rate and Regulatory Matters (Tables)
 6 Months Ended
Jun. 30, 2019
Entergy Arkansas [Member] | FERC December 2015 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The result of the true-up payments and receipts for the recalculation of production costs resulted in the following payments/receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
$2
Entergy Louisiana
$6
Entergy Mississippi
($4)
Entergy New Orleans
($1)
Entergy Texas
($3)
Entergy Arkansas [Member] | FERC May 2018 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The filing shows the additional following payments and receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
($4)
Entergy Louisiana
($23)
Entergy Mississippi
$16
Entergy New Orleans
$5
Entergy Texas
$6
Entergy Louisiana [Member] | FERC December 2015 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The result of the true-up payments and receipts for the recalculation of production costs resulted in the following payments/receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
$2
Entergy Louisiana
$6
Entergy Mississippi
($4)
Entergy New Orleans
($1)
Entergy Texas
($3)
Entergy Louisiana [Member] | FERC May 2018 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The filing shows the additional following payments and receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
($4)
Entergy Louisiana
($23)
Entergy Mississippi
$16
Entergy New Orleans
$5
Entergy Texas
$6
Entergy Mississippi [Member] | FERC December 2015 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The result of the true-up payments and receipts for the recalculation of production costs resulted in the following payments/receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
$2
Entergy Louisiana
$6
Entergy Mississippi
($4)
Entergy New Orleans
($1)
Entergy Texas
($3)
Entergy Mississippi [Member] | FERC May 2018 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The filing shows the additional following payments and receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
($4)
Entergy Louisiana
($23)
Entergy Mississippi
$16
Entergy New Orleans
$5
Entergy Texas
$6
Entergy New Orleans [Member] | FERC December 2015 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The result of the true-up payments and receipts for the recalculation of production costs resulted in the following payments/receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
$2
Entergy Louisiana
$6
Entergy Mississippi
($4)
Entergy New Orleans
($1)
Entergy Texas
($3)
Entergy New Orleans [Member] | FERC May 2018 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The filing shows the additional following payments and receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
($4)
Entergy Louisiana
($23)
Entergy Mississippi
$16
Entergy New Orleans
$5
Entergy Texas
$6
Entergy Texas [Member] | FERC December 2015 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The result of the true-up payments and receipts for the recalculation of production costs resulted in the following payments/receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
$2
Entergy Louisiana
$6
Entergy Mississippi
($4)
Entergy New Orleans
($1)
Entergy Texas
($3)
Entergy Texas [Member] | FERC May 2018 Order [Member]  
Payments Or Receipts Among Utility Operating Companies Related to System Agreement Proceedings [Table Text Block] The filing shows the additional following payments and receipts among the Utility operating companies:
 
Payments (Receipts)
 
(In Millions)
Entergy Arkansas
($4)
Entergy Louisiana
($23)
Entergy Mississippi
$16
Entergy New Orleans
$5
Entergy Texas
$6