Commitments and Contingencies Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended			9 Months Ended
	Oct. 31, 2021	Aug. 31, 2021	Jan. 31, 2021	Sep. 30, 2021	Sep. 30, 2020
Loss Contingencies [Line Items]
Litigation proceeds for reimbursement of spent nuclear fuel storage costs				$ 49,236	$ 67,252
Entergy Louisiana [Member]
Loss Contingencies [Line Items]
Litigation proceeds for reimbursement of spent nuclear fuel storage costs				8,690	5,090
Entergy Louisiana [Member] | River Bend
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party		$ 21,000
Damages awarded for previously recorded operation and maintenance		4,000
Damages awarded for previously capitalized costs		9,000
Damages awarded for previously recorded nuclear fuel expense		8,000
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
Entergy Wholesale Commodities [Member] | Pilgrim
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party		$ 37,600
Entergy Wholesale Commodities [Member] | Indian Point Energy Center | Subsequent Event [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party	$ 83,000