Rate And Regulatory Matters Rate and Regulatory Matters (Payments/Receipts Among The Utility Operating Companies) (Details) - USD ($) $ in Millions	1 Months Ended
	Jul. 31, 2018	Feb. 29, 2016
Entergy Arkansas [Member]
Receipts from utility operating companies pursuant to FERC order	$ (4.2)
FERC May 2018 Order [Member] | Entergy Arkansas [Member]
Receipts from utility operating companies pursuant to FERC order	(4.0)
FERC May 2018 Order [Member] | Entergy Louisiana [Member]
Receipts from utility operating companies pursuant to FERC order	23.0
FERC May 2018 Order [Member] | Entergy Mississippi [Member]
Payments to utility operating companies pursuant to FERC order	16.0
FERC May 2018 Order [Member] | Entergy New Orleans [Member]
Payments to utility operating companies pursuant to FERC order	5.0
FERC May 2018 Order [Member] | Entergy Texas [Member]
Payments to utility operating companies pursuant to FERC order	$ 6.0
FERC December 2015 Order [Member] | Entergy Arkansas [Member]
Payments to utility operating companies pursuant to FERC order		$ 2.0
FERC December 2015 Order [Member] | Entergy Louisiana [Member]
Payments to utility operating companies pursuant to FERC order		6.0
FERC December 2015 Order [Member] | Entergy Mississippi [Member]
Receipts from utility operating companies pursuant to FERC order		4.0
FERC December 2015 Order [Member] | Entergy New Orleans [Member]
Receipts from utility operating companies pursuant to FERC order		1.0
FERC December 2015 Order [Member] | Entergy Texas [Member]
Receipts from utility operating companies pursuant to FERC order		$ 3.0