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 ($)	Dec. 31, 2019 USD ($) $ / MWh	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	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 | $				$ 10	$ 6	$ 28
Entergy Wholesale Commodities [Member] | Scenario, Forecast [Member] | Palisades [Member]
Price Under PPA Upper Range Per MWH								61.50
Subsequent Event [Member] | Entergy Wholesale Commodities [Member] | Palisades [Member]
Accelerated Finite Lived Intangible Assets Amortization Expenses due to termination of PPA | $	$ 5	$ 12	$ 11