Revenue Recognition (Allowance for Doubtful Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Doubtful Other Receivables, Current	$ 30.9	$ 68.6	$ 117.7
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	40.6	56.2
Accounts Receivable, Allowance for Credit Loss, Writeoff	(112.5)	(118.2)
Accounts Receivable, Allowance for Credit Loss, Recovery	34.2	12.9
Entergy Arkansas [Member]
Allowance for Doubtful Other Receivables, Current	6.5	13.1	18.3
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	14.9	30.4
Accounts Receivable, Allowance for Credit Loss, Writeoff	(31.2)	(38.9)
Accounts Receivable, Allowance for Credit Loss, Recovery	9.7	3.3
Entergy Louisiana [Member]
Allowance for Doubtful Other Receivables, Current	7.6	29.2	45.7
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	10.7	16.7
Accounts Receivable, Allowance for Credit Loss, Writeoff	(45.1)	(38.3)
Accounts Receivable, Allowance for Credit Loss, Recovery	12.8	5.1
Entergy New Orleans [Member]
Allowance for Doubtful Other Receivables, Current	11.9	13.3	17.4
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	7.7	7.3
Accounts Receivable, Allowance for Credit Loss, Writeoff	(13.5)	(12.3)
Accounts Receivable, Allowance for Credit Loss, Recovery	4.4	0.9
Entergy Mississippi [Member]
Allowance for Doubtful Other Receivables, Current	2.5	7.2	19.5
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	3.2	0.7
Accounts Receivable, Allowance for Credit Loss, Writeoff	(12.1)	(15.7)
Accounts Receivable, Allowance for Credit Loss, Recovery	4.2	2.7
Entergy Texas [Member]
Allowance for Doubtful Other Receivables, Current	2.4	5.8	$ 16.8
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	4.1	1.1
Accounts Receivable, Allowance for Credit Loss, Writeoff	(10.6)	(13.0)
Accounts Receivable, Allowance for Credit Loss, Recovery	$ 3.1	$ 0.9