Rate And Regulatory Matters Rate and Regulatory Matters (Opportunity Sales Proceeding) (Details) $ in Millions	1 Months Ended
	Dec. 31, 2018 USD ($)
Entergy Arkansas [Member]
Payments for Legal Settlements	$ 135
Entergy Arkansas [Member] | Principal [Member]
Payments for Legal Settlements	68
Entergy Arkansas [Member] | Interest Expense [Member]
Payments for Legal Settlements	67
Entergy Louisiana [Member]
Proceeds from Legal Settlements	(59)
Entergy Louisiana [Member] | Principal [Member]
Proceeds from Legal Settlements	(30)
Entergy Louisiana [Member] | Interest Expense [Member]
Proceeds from Legal Settlements	(29)
Entergy Mississippi [Member]
Proceeds from Legal Settlements	(36)
Entergy Mississippi [Member] | Principal [Member]
Proceeds from Legal Settlements	(18)
Entergy Mississippi [Member] | Interest Expense [Member]
Proceeds from Legal Settlements	(18)
Entergy New Orleans [Member]
Proceeds from Legal Settlements	(7)
Entergy New Orleans [Member] | Principal [Member]
Proceeds from Legal Settlements	(3)
Entergy New Orleans [Member] | Interest Expense [Member]
Proceeds from Legal Settlements	(4)
Entergy Texas [Member]
Proceeds from Legal Settlements	(33)
Entergy Texas [Member] | Principal [Member]
Proceeds from Legal Settlements	(17)
Entergy Texas [Member] | Interest Expense [Member]
Proceeds from Legal Settlements	$ (16)