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Income Taxes Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2021
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
Entergy Arkansas [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
Entergy Louisiana [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
Entergy Mississippi [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
Entergy New Orleans [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
Entergy Texas [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $— 
System Energy [Member]  
Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT [Table Text Block] The return of unprotected excess accumulated deferred income taxes reduced Entergy’s and the Registrant Subsidiaries’ regulatory liability for income taxes as follows:
Three Months
Ended March 31,
20212020
(In Millions)
Entergy$41 $30 
Entergy Arkansas$8 $13 
Entergy Louisiana$8 $8 
Entergy New Orleans$— $3 
Entergy Texas$7 $6 
System Entergy$18 $—