Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Consolidated net income	$ 873,333	$ 1,014,105
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	1,696,323	1,694,904
Deferred income taxes, investment tax credits, and non-current taxes accrued	280,193	320,726
Impairment of Long-Lived Assets Held-for-use	345,200	16,117
Changes in working capital:
Receivables	(245,082)	(200,990)
Fuel inventory	46,951	(608)
Accounts payable	362,529	174,083
Taxes accrued	19,611	206,769
Interest accrued	29,313	10,866
Deferred fuel costs	(356,833)	(48,162)
Other working capital accounts	(94,791)	(114,492)
Changes in provisions for estimated losses	(72,577)	(38,029)
Changes in other regulatory assets	(631,172)	(130,533)
Increase (Decrease) in Regulatory Liabilities	117,301	(38,371)
Changes in pension and other postretirement liabilities	(422,028)	(270,144)
Other Noncash Income (Expense)	62,712	(226,075)
Net cash flow provided by operating activities	2,010,983	2,370,166
INVESTING ACTIVITIES
Construction/capital expenditures	(3,925,632)	(3,175,559)
Allowance for equity funds used during construction	48,629	89,238
Proceeds from Sale of Productive Assets	17,421	0
Nuclear fuel purchases	(127,606)	(177,385)
Payments for Nuclear Fuel	(127,606)	(177,385)
Payments to storm reserve escrow account	(23)	(2,244)
Receipts from storm reserve escrow account	83,105	40,647
Increase (decrease) in other investments	4,239	(9,821)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	49,236	67,252
Proceeds from nuclear decommissioning trust fund sales	4,475,142	1,597,492
Investment in nuclear decommissioning trust funds	(4,463,814)	(1,661,660)
Changes in securitization account	13,862	791
Net cash flow used in investing activities	(3,861,975)	(3,255,882)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	6,269,152	8,170,607
Proceeds from Sale of Treasury Stock	5,613	41,784
Proceeds from Issuance of Common Stock	26,817	0
Retirement of long-term debt	(4,046,791)	(5,386,227)
Changes in credit borrowings and commercial paper - net	(621,168)	(548,522)
Dividends paid:
Common stock	(572,131)	(558,121)
Other	44,176	(5,941)
Net cash flow provided by financing activities	1,091,929	1,699,658
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(759,063)	813,942
Cash and cash equivalents at beginning of period	1,759,099	425,722
Cash and cash equivalents at end of period	1,000,036	1,239,664
Cash paid / (received) during the period for:
Interest - net of amount capitalized	590,581	599,683
Income taxes	29,454	(2,484)
Dividends Paid, Preferred Stock	(13,739)	(13,922)
Payments to Acquire Productive Assets	36,534	24,633
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	304,521	240,608
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	380,481	366,549
Deferred income taxes, investment tax credits, and non-current taxes accrued	105,147	79,948
Changes in working capital:
Receivables	(107,075)	(73,890)
Fuel inventory	26,521	4,761
Accounts payable	15,485	(26,547)
Taxes accrued	(19,899)	(10,733)
Interest accrued	25,616	18,125
Deferred fuel costs	(113,004)	3,203
Other working capital accounts	(26,618)	(9,027)
Changes in provisions for estimated losses	(1,266)	3,508
Changes in other regulatory assets	74,022	(50,262)
Increase (Decrease) in Regulatory Liabilities	(46,061)	(484)
Changes in pension and other postretirement liabilities	(81,913)	(31,245)
Other Noncash Income (Expense)	(82,880)	(2,562)
Net cash flow provided by operating activities	453,077	511,952
INVESTING ACTIVITIES
Construction/capital expenditures	(495,203)	(593,249)
Allowance for equity funds used during construction	10,714	10,671
Payments to Acquire Buildings	0	(5,988)
Nuclear fuel purchases	(72,528)	(72,601)
Payments for Nuclear Fuel	(72,528)	(72,601)
Proceeds from sale of nuclear fuel	16,239	30,638
Change in money pool receivable - net	(4,191)	(51,697)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	55,001
Proceeds from nuclear decommissioning trust fund sales	434,674	254,847
Investment in nuclear decommissioning trust funds	(436,658)	(266,397)
Changes in securitization account	0	4,036
Net cash flow used in investing activities	(546,953)	(634,739)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	708,126	1,058,977
Retirement of long-term debt	(717,214)	(298,071)
Change in money pool payable - net	0	(21,634)
Dividends paid:
Common stock	(25,000)	(25,000)
Other	33,173	2,900
Net cash flow provided by financing activities	(915)	717,172
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(94,791)	594,385
Cash and cash equivalents at beginning of period	192,128	3,519
Cash and cash equivalents at end of period	97,337	597,904
Cash paid / (received) during the period for:
Interest - net of amount capitalized	77,434	86,906
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	535,028	583,321
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	607,299	591,045
Deferred income taxes, investment tax credits, and non-current taxes accrued	159,723	56,767
Changes in working capital:
Receivables	(91,771)	(100,718)
Fuel inventory	5,763	(3,845)
Accounts payable	450,064	169,577
Taxes accrued	94,751	148,379
Interest accrued	4,464	(4,220)
Deferred fuel costs	(49,786)	(61,732)
Other working capital accounts	(41,769)	(33,691)
Changes in provisions for estimated losses	(764)	(42,624)
Changes in other regulatory assets	(938,646)	(129,843)
Increase (Decrease) in Regulatory Liabilities	92,138	(19,761)
Changes in pension and other postretirement liabilities	(68,132)	(49,168)
Other Noncash Income (Expense)	289,625	10,087
Net cash flow provided by operating activities	1,047,987	1,113,574
INVESTING ACTIVITIES
Construction/capital expenditures	(2,147,096)	(1,064,765)
Allowance for equity funds used during construction	20,183	27,197
Proceeds from Sale of Productive Assets	15,000	0
Payments to Acquire Buildings	0	(14,511)
Nuclear fuel purchases	(75,349)	(76,392)
Payments for Nuclear Fuel	(75,349)	(76,392)
Proceeds from sale of nuclear fuel	13,201	35,041
Change in money pool receivable - net	(6,635)	(21,649)
Payments to storm reserve escrow account	0	(1,467)
Receipts from storm reserve escrow account	0	40,601
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	8,690	5,090
Proceeds from nuclear decommissioning trust fund sales	505,840	281,131
Investment in nuclear decommissioning trust funds	(555,749)	(301,170)
Changes in securitization account	(2,815)	(5,925)
Net cash flow used in investing activities	(2,224,730)	(1,096,819)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	2,404,102	1,800,392
Retirement of long-term debt	(1,628,383)	(1,453,564)
Change in money pool payable - net	0	(82,826)
Dividends paid:
Common stock	(60,000)	(21,500)
Other	(303)	(9,100)
Net cash flow provided by financing activities	715,416	233,402
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(461,327)	250,157
Cash and cash equivalents at beginning of period	728,020	2,006
Cash and cash equivalents at end of period	266,693	252,163
Cash paid / (received) during the period for:
Interest - net of amount capitalized	247,878	246,456
Income taxes	0	(20,684)
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	139,983	120,008
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	168,324	155,937
Deferred income taxes, investment tax credits, and non-current taxes accrued	53,629	34,848
Changes in working capital:
Receivables	(36,754)	(21,376)
Fuel inventory	5,564	(359)
Accounts payable	48,413	5,863
Taxes accrued	(30,881)	(10,366)
Interest accrued	4,632	9,075
Deferred fuel costs	(95,310)	(45,998)
Other working capital accounts	(40,911)	(7,372)
Changes in provisions for estimated losses	(8,087)	(28)
Changes in other regulatory assets	(15,366)	(31,987)
Increase (Decrease) in Regulatory Liabilities	49,036	(10,592)
Changes in pension and other postretirement liabilities	(17,454)	(11,451)
Other Noncash Income (Expense)	24,950	14,071
Net cash flow provided by operating activities	249,768	200,273
INVESTING ACTIVITIES
Construction/capital expenditures	(473,956)	(393,887)
Allowance for equity funds used during construction	5,703	4,820
Payments to Acquire Buildings	0	(28,612)
Change in money pool receivable - net	0	40,972
Increase (decrease) in other investments	55	1,729
Net cash flow used in investing activities	(468,198)	(374,978)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	200,539	165,399
Change in money pool payable - net	18,087	0
Dividends paid:
Common stock	0	(7,500)
Other	(186)	8,243
Net cash flow provided by financing activities	218,440	166,142
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	10	(8,563)
Cash and cash equivalents at beginning of period	18	51,601
Cash and cash equivalents at end of period	28	43,038
Cash paid / (received) during the period for:
Interest - net of amount capitalized	49,080	40,551
Income taxes	(8,045)	0
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	22,397	35,565
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	54,758	46,835
Deferred income taxes, investment tax credits, and non-current taxes accrued	11,261	10,382
Changes in working capital:
Receivables	(24,959)	(10,892)
Fuel inventory	79	190
Accounts payable	22,863	1,841
Taxes accrued	(1,699)	(2,283)
Interest accrued	(2,796)	(335)
Deferred fuel costs	4,280	(5,629)
Other working capital accounts	(7,025)	(14,122)
Changes in provisions for estimated losses	(62,293)	1,356
Changes in other regulatory assets	18,412	2,196
Increase (Decrease) in Regulatory Liabilities	11,757	(13,389)
Changes in pension and other postretirement liabilities	(11,220)	(10,373)
Other Noncash Income (Expense)	41,635	4,755
Net cash flow provided by operating activities	77,450	46,097
INVESTING ACTIVITIES
Construction/capital expenditures	(139,153)	(174,011)
Allowance for equity funds used during construction	1,067	5,443
Payments to Acquire Buildings	0	(1,584)
Change in money pool receivable - net	(1,995)	5,191
Payments to storm reserve escrow account	(7)	(428)
Receipts from storm reserve escrow account	83,045	0
Changes in securitization account	(2,380)	(4,176)
Net cash flow used in investing activities	(59,423)	(169,565)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	138,930
Retirement of long-term debt		(25,616)
Changes in credit borrowings and commercial paper - net	19,251
Change in money pool payable - net	(10,190)	5,089
Dividends paid:
Other	(726)	(920)
Net cash flow provided by financing activities	8,335	117,483
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	26,362	(5,985)
Cash and cash equivalents at beginning of period	26	6,017
Cash and cash equivalents at end of period	26,388	32
Cash paid / (received) during the period for:
Interest - net of amount capitalized	23,015	21,203
Income taxes	324	3,332
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	189,689	171,739
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	159,234	131,596
Deferred income taxes, investment tax credits, and non-current taxes accrued	31,518	37,072
Changes in working capital:
Receivables	(50,538)	(55,059)
Fuel inventory	7,232	(1,726)
Accounts payable	20,506	15,542
Taxes accrued	6,003	(12,623)
Interest accrued	(12,808)	(7,855)
Deferred fuel costs	(103,013)	61,995
Other working capital accounts	(19,522)	(8,382)
Changes in provisions for estimated losses	67	(69)
Changes in other regulatory assets	72,760	42,904
Increase (Decrease) in Regulatory Liabilities	(21,469)	(39,791)
Changes in pension and other postretirement liabilities	(16,489)	(18,179)
Other Noncash Income (Expense)	(8,190)	(22,911)
Net cash flow provided by operating activities	254,980	294,253
INVESTING ACTIVITIES
Construction/capital expenditures	(541,161)	(703,650)
Allowance for equity funds used during construction	6,951	33,117
Proceeds from Sale of Productive Assets	67,920	0
Change in money pool receivable - net	4,601	11,181
Changes in securitization account	19,057	6,856
Net cash flow used in investing activities	(479,166)	(657,427)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	127,931	344,110
Retirement of long-term debt	(269,435)	(216,266)
Change in money pool payable - net	20,075	54,229
Dividends paid:
Other	13,455	(5,200)
Net cash flow provided by financing activities	(24,385)	350,279
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(248,571)	(12,895)
Cash and cash equivalents at beginning of period	248,596	12,929
Cash and cash equivalents at end of period	25	34
Cash paid / (received) during the period for:
Interest - net of amount capitalized	77,110	75,129
Income taxes	11,710	8,331
Proceeds from Contributions from Parent	85,000	175,000
Dividends Paid, Preferred Stock	(1,411)	(1,594)
Payments to Acquire Productive Assets	36,534	4,931
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	81,693	88,568
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	151,345	137,201
Deferred income taxes, investment tax credits, and non-current taxes accrued	17,233	(272,383)
Changes in working capital:
Receivables	(5,216)	15,637
Accounts payable	(4,292)	(19,775)
Taxes accrued	(35,063)	431,677
Interest accrued	(1,557)	(188)
Other working capital accounts	5,133	(40,566)
Changes in other regulatory assets	71,486	(25,956)
Increase (Decrease) in Regulatory Liabilities	31,909	45,657
Changes in pension and other postretirement liabilities	(20,721)	(11,033)
Other Noncash Income (Expense)	(161,274)	(189,539)
Net cash flow provided by operating activities	130,676	159,300
INVESTING ACTIVITIES
Construction/capital expenditures	(64,196)	(169,475)
Allowance for equity funds used during construction	4,012	7,990
Nuclear fuel purchases	(27,958)	(85,483)
Payments for Nuclear Fuel	(27,958)	(85,483)
Proceeds from sale of nuclear fuel	21,657	19,444
Change in money pool receivable - net	(8,334)	58,277
Proceeds from nuclear decommissioning trust fund sales	769,979	322,982
Investment in nuclear decommissioning trust funds	(770,763)	(333,002)
Net cash flow used in investing activities	(75,603)	(179,267)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	565,610	859,727
Retirement of long-term debt	(626,010)	(815,710)
Dividends paid:
Common stock	(74,000)	(80,653)
Net cash flow provided by financing activities	(134,400)	(36,636)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(79,327)	(56,603)
Cash and cash equivalents at beginning of period	242,469	68,534
Cash and cash equivalents at end of period	163,142	11,931
Cash paid / (received) during the period for:
Interest - net of amount capitalized	30,335	17,178
Income taxes	$ 39,085	$ (4,000)