Transactions With Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Entergy Arkansas [Member]
Intercompany revenues	$ 127.5	$ 109.8	$ 105.2
Intercompany operating expenses	617.4	559.7	515.5
Intercompany interest and investment income	0.1	0.0	0.0
Entergy Louisiana [Member]
Intercompany revenues	354.0	289.9	280.5
Intercompany operating expenses	770.2	755.2	661.5
Intercompany interest and investment income	186.1	127.6	127.7
Entergy Mississippi [Member]
Intercompany revenues	1.0	1.4	1.2
Intercompany operating expenses	356.1	299.8	283.3
Intercompany interest and investment income	0.1	0.0	0.1
Entergy New Orleans [Member]
Intercompany revenues	0.0	0.0	0.0
Intercompany operating expenses	341.7	287.8	266.0
Intercompany interest and investment income	0.1	0.0	0.0
Entergy Texas [Member]
Intercompany revenues	18.9	64.3	40.4
Intercompany operating expenses	321.4	275.0	260.3
Intercompany interest and investment income	0.3	0.0	0.0
System Energy [Member]
Intercompany revenues	658.8	545.6	520.7
Intercompany operating expenses	215.0	190.8	177.4
Intercompany interest and investment income	0.3	0.0	0.2
EWO Marketing, LLC [Member] | RS Cogen [Member]
Intercompany operating expenses	$ 24.0	$ 24.0	$ 26.0