Revenue Recognition Revenue Recognition (Narrative) (Details) $ in Millions	12 Months Ended						29 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) $ / MWh	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2007 $ / MWh	May 31, 2022 $ / MWh
System Energy [Member]
Percent Interest in Grand Gulf			90.00%
Entergy Wholesale Commodities [Member] | Palisades [Member]
Price Under PPA Lower Range Per MWH						43.50
Average Price Under PPA			51
Amortization of Intangible Assets | $			$ 11	$ 10	$ 6
Entergy Wholesale Commodities [Member] | Scenario, Forecast [Member] | Palisades [Member]
Price Under PPA Upper Range Per MWH							61.50
Additional Price Under PPA Per 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	$ 12