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 to utility operating companies pursuant to Opportunity Sales Proceeding	$ 135
Entergy Arkansas [Member] | Principal
Payments to utility operating companies pursuant to Opportunity Sales Proceeding	68
Entergy Arkansas [Member] | Interest Expense
Payments to utility operating companies pursuant to Opportunity Sales Proceeding	67
Entergy Louisiana [Member]
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(59)
Entergy Louisiana [Member] | Principal
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(30)
Entergy Louisiana [Member] | Interest Expense
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(29)
Entergy Mississippi [Member]
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(36)
Entergy Mississippi [Member] | Principal
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(18)
Entergy Mississippi [Member] | Interest Expense
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(18)
Entergy New Orleans [Member]
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(7)
Entergy New Orleans [Member] | Principal
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(3)
Entergy New Orleans [Member] | Interest Expense
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(4)
Entergy Texas [Member]
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(33)
Entergy Texas [Member] | Principal
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	(17)
Entergy Texas [Member] | Interest Expense
Receipts from utility operating companies pursuant to Opportunity Sales Proceeding	$ (16)