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Commitments And Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
Entergy Arkansas [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
Entergy Louisiana [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
Entergy Mississippi [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
Entergy New Orleans [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
Entergy Texas [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—
System Energy [Member]  
Maximum Amounts Of Possible Assessments Per Occurrence Effective April 1, 2020, the maximum amounts of such possible assessments per occurrence were as follows:
 Assessments
 (In Millions)
Utility: 
Entergy Arkansas$29.6
Entergy Louisiana$51.8
Entergy Mississippi$0.11
Entergy New Orleans$0.11
Entergy TexasN/A
System Energy$22.4
  
Entergy Wholesale Commodities$—