VARIABLE INTEREST ENTITIES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Variable Interest Entity [Line Items]
Assets	$ 81,855,495		$ 71,890,730
ENTERGY LOUISIANA, LLC
Variable Interest Entity [Line Items]
Assets	38,999,776		33,337,570
SYSTEM ENERGY RESOURCES, INC.
Variable Interest Entity [Line Items]
Assets	5,209,617		5,008,405
SYSTEM ENERGY RESOURCES, INC. | Grand Gulf
Variable Interest Entity [Line Items]
Payments on lease including interest	17,200	$ 17,200
ENTERGY ARKANSAS, LLC
Variable Interest Entity [Line Items]
Assets	18,044,032		16,470,902
ENTERGY ARKANSAS, LLC | AR Searcy Partnership, LLC
Variable Interest Entity [Line Items]
Assets	121,100		124,400
Ownership interest	110,300		113,100
ENTERGY MISSISSIPPI, LLC
Variable Interest Entity [Line Items]
Assets	10,073,897		8,476,474
ENTERGY MISSISSIPPI, LLC | MS Sunflower Partnership, LLC
Variable Interest Entity [Line Items]
Assets	149,300		154,500
Ownership interest	$ 132,500		134,900
Restoration Law Trust I | ENTERGY LOUISIANA, LLC
Variable Interest Entity [Line Items]
LURC's beneficial interest in the storm trust, percentage	1.00%
Restoration Law Trust I | ENTERGY LOUISIANA, LLC | Entergy Finance Company
Variable Interest Entity [Line Items]
Noncontrolling interest	$ 26,600		27,100
Restoration Law Trust I | Entergy Finance Company | ENTERGY LOUISIANA, LLC
Variable Interest Entity [Line Items]
Asset held by trust	$ 2,500,000		2,700,000
Restoration Law Trust II | ENTERGY LOUISIANA, LLC
Variable Interest Entity [Line Items]
LURC's beneficial interest in the storm trust, percentage	1.00%
Restoration Law Trust II | ENTERGY LOUISIANA, LLC | Entergy Finance Company
Variable Interest Entity [Line Items]
Noncontrolling interest	$ 13,500		13,100
Restoration Law Trust II | Entergy Finance Company | ENTERGY LOUISIANA, LLC
Variable Interest Entity [Line Items]
Asset held by trust	$ 1,300,000		$ 1,300,000