Commitments and Contingencies Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Loss Contingencies [Line Items]
Litigation proceeds for reimbursement of spent nuclear fuel storage costs		$ 15,735	$ 62,162
Entergy Arkansas [Member]
Loss Contingencies [Line Items]
Litigation proceeds for reimbursement of spent nuclear fuel storage costs		$ 0	$ 55,001
Entergy Wholesale Commodities [Member] | Palisades [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party	$ 23,100
Damages awarded for previously recorded operation and maintenance	7,100
Damages awarded for previously capitalized costs	15,700
Damages awarded for previously recorded taxes other than income taxes	300
Reduction of previously recorded deprecation expense	$ 9,100