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 ($) $ / MWh	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 31, 2022 $ / MWh	Dec. 31, 2019 $ / MWh
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		$ 40.6	$ 56.2
COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		$ (6.4)	30.4
System Energy [Member]
Percent Interest in Grand Gulf		90.00%
Entergy Louisiana [Member]
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		$ 10.7	16.7
Entergy Louisiana [Member] | COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		(8.5)	7.4
Entergy Mississippi [Member]
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		3.2	0.7
Entergy Mississippi [Member] | COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(2.4)
Entergy Texas [Member]
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		4.1	1.1
Entergy Texas [Member] | COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		(1.3)	(1.1)
Entergy New Orleans [Member]
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		7.7	7.3
Entergy New Orleans [Member] | COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		(3.0)	4.3
Entergy Arkansas [Member]
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		14.9	30.4
Entergy Arkansas [Member] | COVID-19 Pandemic
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)		$ 6.4	22.2
Entergy Wholesale Commodities [Member] | Palisades [Member]
Average Price Under PPA | $ / MWh		51
Amortization of Intangible Assets		$ 5.0	$ 12.0	$ 11.0
Contract price under purchase power agreement | $ / MWh	61.50				24.14	43.50