Business Segment Information (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2022	Dec. 31, 2020	Dec. 31, 2016
Segment Reporting Information [Line Items]
Asset Write-Offs, Impairments, And Related Charges	$ 226,678	$ 491,739	$ 357,251
Entergy Wholesale Commodities [Member]
Segment Reporting Information [Line Items]
Restructuring costs incurred, pre-tax	91,000	139,000	113,000
Asset Write-Offs, Impairments, And Related Charges	290,000	532,000	538,000
Restructuring Reserve	143,000	193,000	97,000			$ 91,000
Employee Retention and Severances Expenses and Other Benefits-Related Costs [Member] | Entergy Wholesale Commodities [Member]
Segment Reporting Information [Line Items]
Restructuring costs incurred, pre-tax	91,000	139,000	113,000
Restructuring Reserve	$ 129,000	$ 179,000	$ 83,000			$ 70,000
Employee Retention and Severances Expenses and Other Benefits-Related Costs [Member] | Entergy Wholesale Commodities [Member] | Subsequent Event [Member]
Segment Reporting Information [Line Items]
Restructuring Reserve				$ 55,000	$ 75,000