Revenue Recognition Revenue Recognition (Narrative) (Details) $ in Millions	5 Months Ended	12 Months Ended				29 Months Ended	156 Months Ended
	May 31, 2022 $ / MWh	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / MWh	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2022 $ / MWh	Dec. 31, 2019 $ / MWh
Regulatory asset related to incremental bad debt expense resulting from COVID-19			$ 30.4	$ 87.1
System Energy [Member]
Percent Interest in Grand Gulf			90.00%
Entergy Louisiana [Member]
Regulatory asset related to incremental bad debt expense resulting from COVID-19			$ 7.4	36.0
Entergy Mississippi [Member]
Regulatory asset related to incremental bad debt expense resulting from COVID-19			(2.4)	15.5
Entergy Texas [Member]
Regulatory asset related to incremental bad debt expense resulting from COVID-19			$ (1.1)	12.9
Entergy Wholesale Commodities [Member] | Palisades [Member]
Average Price Under PPA | $ / MWh			51
Amortization of Intangible Assets			$ 12.0	$ 11.0	$ 10.0
Contract price under purchase power agreement | $ / MWh							43.50
Entergy Wholesale Commodities [Member] | Scenario, Forecast [Member] | Palisades [Member]
Contract price under purchase power agreement | $ / MWh						24.14
Subsequent Event [Member] | Entergy Wholesale Commodities [Member] | Palisades [Member]
Accelerated Finite Lived Intangible Assets Amortization Expenses due to termination of PPA		$ 5.0
Contract price under purchase power agreement | $ / MWh	61.50