Consolidated Statement of Cash Flows (Paranthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Increase (Decrease) in Customer advances in aid of construction - non-current	$ 117,198	$ 25,000
Payment for Advance for Construction, Financing Activity	(190,902)	(149,543)
Increase (Decrease) in Customer advances in aid of construction - current	251,591	105,799
Proceeds from (Payment for) Other Financing Activity	(5,890)	8,360
Entergy Louisiana [Member]
Payment for Advance for Construction, Financing Activity	(121,451)	(60,339)
Increase (Decrease) in Customer advances in aid of construction - current	65,593	(695)
Proceeds from (Payment for) Other Financing Activity	(2,425)	(2,346)
Entergy Arkansas [Member]
Increase (Decrease) in Customer advances in aid of construction - non-current	48,700	0
Payment for (Proceeds from) Other Investing Activity	0	51
Proceeds from (Payment for) Other Financing Activity	26,278	(13,265)
System Energy [Member]
Proceeds from (Payment for) Other Financing Activity	$ (22)	$ 0