Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Consolidated net income	$ 1,118,719	$ 1,406,653	$ 1,258,244
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	2,242,944	2,257,750	2,182,313
Deferred income taxes, investment tax credits, and non-current taxes accrued	248,719	(131,114)	193,950
Asset Write-Offs, Impairments, And Related Charges	263,599	26,379	226,678
Changes in working capital:
Receivables	(84,629)	(139,296)	(101,227)
Fuel inventory	18,359	(27,458)	(28,173)
Accounts payable	269,797	137,457	(71,898)
Taxes accrued	(21,183)	207,556	(20,784)
Interest accrued	(10,640)	7,662	937
Deferred fuel costs	(466,050)	(49,484)	172,146
Other working capital accounts	(53,883)	(143,451)	(3,108)
Changes in provisions for estimated losses	(85,713)	(291,193)	19,914
Increase (Decrease) in Other Regulatory Assets	536,707	784,494	545,559
Increase (Decrease) in Regulatory Liabilities	43,631	238,669	(14,781)
Changes in pension and other postretirement liabilities	(897,167)	50,379	187,124
Other	(250,917)	76,149	639,149
Net cash flow provided by operating activities	2,300,713	2,689,866	2,816,627
INVESTING ACTIVITIES
Construction/capital expenditures	(6,087,296)	(4,694,076)	(4,197,667)
Allowance for equity funds used during construction	70,473	119,430	144,862
Nuclear fuel purchases	(166,512)	(215,664)	(128,366)
Payment for purchase of plant or assets	(168,304)	(247,121)	(305,472)
Net proceeds from sale of assets	17,421	0	28,932
Proceeds from insurance	0	0	7,040
Changes in securitization account	13,669	5,099	3,298
Payments To Storm Reserve Escrow Account	(25)	(2,273)	(8,038)
Receipts from storm reserve escrow account	83,105	297,588	0
Decrease (increase) in other investments	2,343	(12,755)	30,319
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	49,236	72,711	2,369
Proceeds from nuclear decommissioning trust fund sales	5,553,629	3,107,812	4,121,351
Investment in nuclear decommissioning trust funds	(5,547,015)	(3,203,057)	(4,208,870)
Net cash flow used in investing activities	(6,179,276)	(4,772,306)	(4,510,242)
Proceeds from the issuance of:
Long-term debt	8,308,427	12,619,201	9,304,396
Preferred stock of subsidiary	0	0	33,188
Common stock and treasury stock	5,977	42,600	93,862
Proceeds from Issuance of Common Stock	200,776	0	607,650
Retirement of long-term debt	(4,827,827)	(8,152,378)	(7,619,380)
Payments for Repurchase of Preferred Stock and Preference Stock	0	0	50,000
Changes in credit borrowings and commercial paper - net	426,312	319,238	(4,389)
Other	43,221	(7,524)	(7,732)
Dividends paid:
Common stock	(775,122)	(748,342)	(711,573)
Preferred stock	(18,319)	(18,502)	(16,438)
Net cash flow provided by financing activities	2,562,023	3,415,817	1,638,362
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(1,316,540)	1,333,377	(55,253)
Cash and cash equivalents at beginning of period	1,759,099	425,722	480,975
Cash and cash equivalents at end of period	442,559	1,759,099	425,722
Cash paid (received) during the period for:
Interest - net of amount capitalized	843,228	803,923	778,209
Income taxes	98,377	(31,228)	(40,435)
Proceeds from Noncontrolling Interests	51,202	0	0
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	298,484	245,232	262,964
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	503,539	490,457	465,299
Deferred income taxes, investment tax credits, and non-current taxes accrued	100,459	87,019	94,368
Changes in working capital:
Receivables	17,682	(24,507)	(58,077)
Fuel inventory	(7,081)	(10,066)	(10,597)
Accounts payable	27,967	(22,773)	3,059
Taxes accrued	7,753	6	24,942
Interest accrued	(5,637)	(43)	3,895
Deferred fuel costs	(162,458)	(1,186)	72,560
Other working capital accounts	(53,343)	(11,061)	18,783
Changes in provisions for estimated losses	6,915	6,289	14,901
Increase (Decrease) in Other Regulatory Assets	(142,706)	165,534	131,873
Increase (Decrease) in Regulatory Liabilities	21,066	106,878	39,293
Changes in pension and other postretirement liabilities	(175,863)	42,576	5,831
Other	172,973	83,469	127,582
Net cash flow provided by operating activities	549,216	659,818	677,766
INVESTING ACTIVITIES
Construction/capital expenditures	(722,628)	(775,595)	(641,525)
Allowance for equity funds used during construction	15,273	15,019	15,306
Nuclear fuel purchases	(84,302)	(100,678)	(54,344)
Payment for purchase of plant or assets	(131,770)	(5,988)	0
Decrease (increase) in other investments	0	4,036	630
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	55,001	0
Proceeds from nuclear decommissioning trust fund sales	530,628	321,360	317,377
Investment in nuclear decommissioning trust funds	(524,783)	(336,392)	(336,519)
Net cash flow used in investing activities	(898,193)	(795,709)	(676,293)
Proceeds from the issuance of:
Long-term debt	719,284	1,071,121	834,038
Retirement of long-term debt	(728,917)	(632,175)	(548,952)
Other	38,291	2,188	(7,055)
Dividends paid:
Common stock	(50,000)	(95,000)	(115,000)
Net cash flow provided by financing activities	169,764	324,500	1,927
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(179,213)	188,609	3,400
Cash and cash equivalents at beginning of period	192,128	3,519	119
Cash and cash equivalents at end of period	12,915	192,128	3,519
Cash paid (received) during the period for:
Interest - net of amount capitalized	143,561	140,735	131,134
Income taxes	(18,933)	(21,971)	(33,989)
Proceeds from sale of nuclear fuel	16,279	30,638	22,782
Change in money pool receivable - net	3,110	(3,110)	0
Proceeds from Noncontrolling Interests	51,202	0	0
Change in money pool payable - net	139,904	(21,634)	(161,104)
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	653,984	1,082,352	691,537
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	818,389	783,616	685,062
Deferred income taxes, investment tax credits, and non-current taxes accrued	175,700	(356,256)	196,533
Changes in working capital:
Receivables	(58,466)	(79,451)	13,942
Fuel inventory	7,722	(9,067)	(7,195)
Accounts payable	358,536	160,659	(33,375)
Taxes accrued	21,631	50,576	(38,827)
Interest accrued	803	4,505	4,294
Deferred fuel costs	(43,124)	(57,895)	24,234
Other working capital accounts	(45,517)	(76,284)	(62,536)
Changes in provisions for estimated losses	(449)	(295,480)	9,664
Increase (Decrease) in Other Regulatory Assets	1,050,600	410,855	210,134
Increase (Decrease) in Regulatory Liabilities	(16,478)	71,698	(35,881)
Changes in pension and other postretirement liabilities	(164,263)	12,199	35,162
Other	(394,658)	(192,669)	36,478
Net cash flow provided by operating activities	1,052,526	1,072,986	1,236,002
INVESTING ACTIVITIES
Construction/capital expenditures	(3,621,775)	(1,960,787)	(1,673,194)
Allowance for equity funds used during construction	28,648	38,151	74,023
Nuclear fuel purchases	(85,419)	(92,831)	(85,984)
Net proceeds from sale of assets	15,000	0	0
Payments for (Proceeds from) Productive Assets	0	(236,999)	0
Proceeds from insurance	0	0	7,040
Payment For Proceed From Other Investing Activities	8,691	5,090	2,369
Changes in securitization account	2,700	951	(32)
Payments To Storm Reserve Escrow Account	0	(1,488)	(6,353)
Receipts from storm reserve escrow account	0	297,363	0
Proceeds from nuclear decommissioning trust fund sales	944,703	347,021	412,559
Investment in nuclear decommissioning trust funds	(1,004,888)	(372,227)	(442,501)
Net cash flow used in investing activities	(3,700,199)	(1,944,671)	(1,653,634)
Proceeds from the issuance of:
Long-term debt	3,769,166	3,675,083	2,691,133
Retirement of long-term debt	(1,895,091)	(1,962,635)	(2,199,053)
Other	(849)	(10,423)	9,368
Dividends paid:
Common stock	(60,000)	(21,500)	(208,000)
Net cash flow provided by financing activities	1,938,226	1,597,699	376,274
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(709,447)	726,014	(41,358)
Cash and cash equivalents at beginning of period	728,020	2,006	43,364
Cash and cash equivalents at end of period	18,573	728,020	2,006
Cash paid (received) during the period for:
Interest - net of amount capitalized	337,926	318,352	296,842
Income taxes	(18,453)	(14,714)	15,272
Proceeds from sale of nuclear fuel	13,254	44,511	11,596
Change in money pool receivable - net	(1,113)	(13,426)	46,843
Proceeds from Contributions from Parent	125,000	0	0
Change in money pool payable - net	0	(82,826)	82,826
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	166,834	140,583	119,925
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	226,545	209,252	170,886
Deferred income taxes, investment tax credits, and non-current taxes accrued	64,868	36,827	32,547
Changes in working capital:
Receivables	10,260	(1,889)	(17,245)
Fuel inventory	6,806	(1,978)	(3,208)
Accounts payable	27,068	22,794	(226)
Taxes accrued	(1,811)	17,423	13,109
Interest accrued	(3,606)	1,989	(1,331)
Deferred fuel costs	(136,569)	(55,711)	78,418
Other working capital accounts	(9,522)	630	(5,557)
Changes in provisions for estimated losses	(8,476)	(3,517)	(1,121)
Increase (Decrease) in Other Regulatory Assets	(4,909)	89,369	34,923
Increase (Decrease) in Regulatory Liabilities	21,930	(18,672)	(21,524)
Changes in pension and other postretirement liabilities	(51,828)	11,319	6,534
Other	(33,552)	(30,633)	(3,668)
Net cash flow provided by operating activities	350,960	300,314	339,952
INVESTING ACTIVITIES
Construction/capital expenditures	(654,352)	(555,287)	(432,600)
Allowance for equity funds used during construction	8,101	6,726	8,356
Payments for (Proceeds from) Productive Assets	0	(28,612)	(305,472)
Decrease (increase) in other investments	53	1,719	(655)
Net cash flow used in investing activities	(686,654)	(530,762)	(733,684)
Proceeds from the issuance of:
Long-term debt	398,284	165,385	437,153
Retirement of long-term debt	0	0	(150,000)
Other	1,535	6,964	(8,774)
Dividends paid:
Common stock	0	(10,000)	0
Net cash flow provided by financing activities	383,303	178,865	408,379
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	47,609	(51,583)	14,647
Cash and cash equivalents at beginning of period	18	51,601	36,954
Cash and cash equivalents at end of period	47,627	18	51,601
Cash paid (received) during the period for:
Interest - net of amount capitalized	76,245	64,536	60,533
Income taxes	(19,672)	(8,084)	(12,204)
Change in money pool receivable - net	(40,456)	44,692	(3,313)
Proceeds from Contributions from Parent	0	0	130,000
Change in money pool payable - net	(16,516)	16,516	0
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	31,798	49,338	52,629
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	73,480	64,012	56,072
Deferred income taxes, investment tax credits, and non-current taxes accrued	12,573	3,938	21,350
Changes in working capital:
Receivables	(42,612)	(12,003)	(9,372)
Fuel inventory	(967)	(58)	(387)
Accounts payable	22,457	5,582	(5,571)
Taxes accrued	(315)	398	234
Interest accrued	(104)	1,179	550
Deferred fuel costs	9,737	(7,048)	3,630
Other working capital accounts	(3,233)	(13,156)	5,021
Changes in provisions for estimated losses	(83,569)	1,356	1,948
Increase (Decrease) in Other Regulatory Assets	(18,173)	7,427	29,567
Increase (Decrease) in Regulatory Liabilities	4,985	(4,728)	(22,105)
Changes in pension and other postretirement liabilities	(32,144)	(14,063)	(14,624)
Other	(68,549)	3,296	(55,796)
Net cash flow provided by operating activities	78,808	64,024	115,604
INVESTING ACTIVITIES
Construction/capital expenditures	(220,284)	(228,983)	(229,560)
Allowance for equity funds used during construction	2,371	6,339	9,941
Payments to Acquire Buildings	0	(1,584)	0
Changes in securitization account	1,365	(1,375)	236
Payments To Storm Reserve Escrow Account	(7)	(433)	(1,752)
Receipts from storm reserve escrow account	83,045	0	0
Net cash flow used in investing activities	(169,920)	(220,845)	(204,310)
Proceeds from the issuance of:
Long-term debt	183,403	138,925	113,876
Retirement of long-term debt	(36,873)	(56,593)	(35,376)
Other	(774)	146	(1,475)
Dividends paid:
Net cash flow provided by financing activities	133,948	150,830	75,046
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	42,836	(5,991)	(13,660)
Repayment of long-term payable due to Entergy Louisiana	(1,618)	(1,838)	(1,979)
Cash and cash equivalents at beginning of period	26	6,017	19,677
Cash and cash equivalents at end of period	42,862	26	6,017
Cash paid (received) during the period for:
Interest - net of amount capitalized	28,009	26,673	22,873
Income taxes	(3,839)	3,392	(5,310)
Change in money pool receivable - net	(36,410)	5,191	16,825
Proceeds from Contributions from Parent	0	60,000	0
Change in money pool payable - net	(10,190)	10,190	0
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	228,824	215,073	159,397
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	214,838	177,738	153,286
Deferred income taxes, investment tax credits, and non-current taxes accrued	48,813	36,033	20,143
Changes in working capital:
Receivables	(16,455)	(30,082)	58,445
Fuel inventory	10,819	(5,938)	(4,926)
Accounts payable	(5,718)	(23,692)	(33,646)
Taxes accrued	(3,420)	2,730	(3,805)
Interest accrued	(1,854)	1,864	(5,363)
Deferred fuel costs	(133,636)	72,355	(6,696)
Other working capital accounts	(12,105)	(11,837)	(13,822)
Changes in provisions for estimated losses	(140)	274	(5,748)
Increase (Decrease) in Other Regulatory Assets	(103,380)	12,065	(85,400)
Increase (Decrease) in Regulatory Liabilities	(28,747)	(57,477)	(105,517)
Changes in pension and other postretirement liabilities	(42,502)	(28,825)	(7,152)
Other	5,164	(39,174)	3,257
Net cash flow provided by operating activities	356,933	375,325	286,739
INVESTING ACTIVITIES
Construction/capital expenditures	(702,754)	(895,857)	(898,090)
Allowance for equity funds used during construction	9,892	44,073	28,526
Payments to Acquire Buildings	(36,534)	(4,931)	0
Net proceeds from sale of assets	67,920	0	0
Changes in securitization account	9,604	1,487	2,465
Net cash flow used in investing activities	(647,271)	(848,648)	(878,280)
Proceeds from the issuance of:
Long-term debt	127,931	937,725	986,019
Retirement of long-term debt	(269,435)	(367,565)	(578,593)
Other	6,848	(4,106)	1,189
Dividends paid:
Common stock	0	(30,000)	0
Preferred stock	(1,881)	(2,064)	0
Net cash flow provided by financing activities	41,770	708,990	604,414
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(248,568)	235,667	12,873
Cash and cash equivalents at beginning of period	248,596	12,929	56
Cash and cash equivalents at end of period	28	248,596	12,929
Cash paid (received) during the period for:
Interest - net of amount capitalized	87,094	89,077	89,402
Income taxes	17,594	2,792	17,010
Change in money pool receivable - net	4,601	6,580	(11,181)
Proceeds from Contributions from Parent	95,000	175,000	185,000
Proceeds from Issuance of Preferred Stock and Preference Stock	3,713	0	33,188
Change in money pool payable - net	79,594	0	(22,389)
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	106,814	99,131	99,120
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	198,067	184,429	212,170
Deferred income taxes, investment tax credits, and non-current taxes accrued	11,191	(455,732)	95
Changes in working capital:
Receivables	6,054	13,932	(23,382)
Accounts payable	23,973	(11,587)	18,204
Taxes accrued	(50,059)	69,145	19,247
Interest accrued	(1,008)	729	(1,302)
Other working capital accounts	25,096	(34,158)	15,879
Increase (Decrease) in Other Regulatory Assets	(143,417)	48,880	43,712
Increase (Decrease) in Regulatory Liabilities	40,884	140,965	130,949
Changes in pension and other postretirement liabilities	(49,308)	15,596	11,177
Other	253,910	119,032	138,304
Net cash flow provided by operating activities	201,211	(145,462)	300,141
INVESTING ACTIVITIES
Construction/capital expenditures	(100,474)	(193,857)	(166,695)
Allowance for equity funds used during construction	6,188	9,122	8,709
Nuclear fuel purchases	(45,180)	(94,991)	(18,170)
Decrease (increase) in other investments	(300)	0	0
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	5,459	0
Proceeds from nuclear decommissioning trust fund sales	1,022,170	418,943	500,384
Investment in nuclear decommissioning trust funds	(1,025,779)	(432,249)	(517,828)
Net cash flow used in investing activities	(193,392)	(206,443)	(119,553)
Proceeds from the issuance of:
Long-term debt	662,423	1,147,903	1,103,917
Retirement of long-term debt	(727,510)	(891,410)	(1,187,406)
Dividends paid:
Common stock	(96,000)	(80,653)	(124,250)
Net cash flow provided by financing activities	(161,087)	525,840	(207,739)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(153,268)	173,935	(27,151)
Cash and cash equivalents at beginning of period	242,469	68,534	95,685
Cash and cash equivalents at end of period	89,201	242,469	68,534
Cash paid (received) during the period for:
Interest - net of amount capitalized	39,340	35,061	21,052
Income taxes	54,959	384,329	2,284
Proceeds from sale of nuclear fuel	21,724	25,836	26,223
Change in money pool receivable - net	(71,741)	55,294	47,824
Proceeds from Contributions from Parent	$ 0	$ 350,000	$ 0