Rate And Regulatory Matters Rate and Regulatory Matters (Opportunity Sales Proceeding) (Details) $ in Millions	1 Months Ended
	Dec. 31, 2018 USD ($)
Entergy Arkansas [Member]
Principle payments to utility operating companies pursuant to Opportunity Sales Proceeding	$ 68
Interest payments to utility operating companies pursuant to Opportunity Sales Proceeding	67
Payments to utility operating companies pursuant to Opportunity Sales Proceeding	135
Entergy Louisiana [Member]
Principle payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(30)
Interest payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(29)
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(59)
Entergy Mississippi [Member]
Principle payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(18)
Interest payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(18)
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(36)
Entergy New Orleans [Member]
Principle payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(3)
Interest payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(4)
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(7)
Entergy Texas [Member]
Principle payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(17)
Interest payments received from utility operating companies pursuant to Opportunity Sales Proceeding	(16)
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	$ (33)