Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Consolidated net income	$ 337,750	$ 488,406
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	1,150,294	1,131,212
Deferred income taxes, investment tax credits, and non-current taxes accrued	115,274	68,332
Impairment of Long-Lived Assets Held-for-use	345,339	11,735
Changes in working capital:
Receivables	(154,277)	(30,990)
Fuel inventory	16,718	(19,897)
Accounts payable	(131,414)	(39,054)
Taxes accrued	(69,711)	44,469
Interest accrued	(162)	4,188
Deferred fuel costs	(286,116)	33,298
Other working capital accounts	(86,774)	(63,943)
Changes in provisions for estimated losses	(54,278)	(37,968)
Changes in other regulatory assets	93,776	74,610
Increase (Decrease) in Regulatory Liabilities	170,932	(164,158)
Changes in pension and other postretirement liabilities	(259,593)	(177,224)
Other Noncash Income (Expense)	(441,211)	125,291
Net cash flow provided by operating activities	746,547	1,448,307
INVESTING ACTIVITIES
Construction/capital expenditures	(2,883,376)	(2,185,294)
Allowance for equity funds used during construction	31,449	64,324
Proceeds from Sale of Productive Assets	22,421	0
Nuclear fuel purchases	(73,858)	(113,592)
Payments for Nuclear Fuel	(73,858)	(113,592)
Payments to storm reserve escrow account	(17)	(1,965)
Receipts from storm reserve escrow account	44,205	40,589
Decrease in other investments	10,753	2,262
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	15,735	67,252
Proceeds from nuclear decommissioning trust fund sales	3,837,482	1,249,548
Investment in nuclear decommissioning trust funds	(3,804,170)	(1,309,209)
Changes in securitization account	9,685	12,525
Net cash flow used in investing activities	(2,826,225)	(2,198,193)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	5,008,330	5,201,010
Proceeds from Sale of Treasury Stock	4,039	41,753
Proceeds from Issuance of Common Stock	26,817	0
Retirement of long-term debt	(2,900,566)	(3,592,919)
Changes in credit borrowings and commercial paper - net	(761,244)	(508)
Dividends paid:
Common stock	(381,224)	(371,914)
Other	20,467	(8,448)
Net cash flow provided by financing activities	1,007,460	1,259,632
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(1,072,218)	509,746
Cash and cash equivalents at beginning of period	1,759,099	425,722
Cash and cash equivalents at end of period	686,881	935,468
Cash paid / (received) during the period for:
Interest - net of amount capitalized	428,301	405,248
Income taxes	27,488	(10,007)
Dividends Paid, Preferred Stock	(9,159)	(9,342)
Payments to Acquire Productive Assets	36,534	24,633
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	149,630	104,765
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	252,537	243,126
Deferred income taxes, investment tax credits, and non-current taxes accrued	50,780	24,970
Changes in working capital:
Receivables	(86,447)	(10,360)
Fuel inventory	12,996	(12,704)
Accounts payable	27,920	(34,009)
Taxes accrued	(6,529)	(409)
Interest accrued	(2,490)	119
Deferred fuel costs	(74,857)	16,322
Other working capital accounts	(36,703)	(23,858)
Changes in provisions for estimated losses	(6,122)	998
Changes in other regulatory assets	32,837	(26,191)
Increase (Decrease) in Regulatory Liabilities	17,776	(50,637)
Changes in pension and other postretirement liabilities	(46,940)	(419)
Other Noncash Income (Expense)	(119,755)	55,318
Net cash flow provided by operating activities	164,633	287,031
INVESTING ACTIVITIES
Construction/capital expenditures	(322,044)	(406,940)
Allowance for equity funds used during construction	6,601	6,795
Payments to Acquire Buildings	0	(5,988)
Nuclear fuel purchases	(25,466)	(57,781)
Payments for Nuclear Fuel	(25,466)	(57,781)
Proceeds from sale of nuclear fuel	16,239	18,107
Change in money pool receivable - net	(5,086)	0
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	55,001
Proceeds from nuclear decommissioning trust fund sales	227,807	183,474
Investment in nuclear decommissioning trust funds	(224,757)	(194,776)
Changes in securitization account	0	1,244
Net cash flow used in investing activities	(326,706)	(400,864)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	694,137	335,902
Retirement of long-term debt	(618,511)	(226,366)
Change in money pool payable - net	0	4,231
Dividends paid:
Other	19,445	(880)
Net cash flow provided by financing activities	95,071	112,887
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(67,002)	(946)
Cash and cash equivalents at beginning of period	192,128	3,519
Cash and cash equivalents at end of period	125,126	2,573
Cash paid / (received) during the period for:
Interest - net of amount capitalized	70,700	69,276
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	310,553	359,855
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	402,106	392,286
Deferred income taxes, investment tax credits, and non-current taxes accrued	90,537	(1,353)
Changes in working capital:
Receivables	(66,281)	(38,175)
Fuel inventory	(1,240)	(2,233)
Accounts payable	25,685	(37,576)
Taxes accrued	54,850	91,662
Interest accrued	2,162	3,689
Deferred fuel costs	(96,429)	(763)
Other working capital accounts	(36,605)	(13,069)
Changes in provisions for estimated losses	(291)	(38,621)
Changes in other regulatory assets	(124,939)	48,536
Increase (Decrease) in Regulatory Liabilities	87,823	(42,203)
Changes in pension and other postretirement liabilities	(43,936)	(34,280)
Other Noncash Income (Expense)	(84,588)	39,034
Net cash flow provided by operating activities	519,407	726,789
INVESTING ACTIVITIES
Construction/capital expenditures	(1,655,993)	(690,049)
Allowance for equity funds used during construction	12,936	20,942
Payments to Acquire Buildings	0	(14,511)
Nuclear fuel purchases	(63,479)	(24,086)
Payments for Nuclear Fuel	(63,479)	(24,086)
Proceeds from sale of nuclear fuel	0	35,041
Change in money pool receivable - net	(90,225)	(87,635)
Payments to storm reserve escrow account	0	(1,398)
Receipts from storm reserve escrow account	0	40,589
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	5,090
Proceeds from nuclear decommissioning trust fund sales	459,326	223,736
Investment in nuclear decommissioning trust funds	(498,332)	(240,559)
Changes in securitization account	(956)	755
Net cash flow used in investing activities	(1,836,723)	(732,085)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	2,097,214	1,401,887
Retirement of long-term debt	(1,296,875)	(826,456)
Change in money pool payable - net	0	(82,826)
Dividends paid:
Common stock	0	(16,500)
Other	(4,169)	(9,080)
Net cash flow provided by financing activities	796,170	467,025
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(521,146)	461,729
Cash and cash equivalents at beginning of period	728,020	2,006
Cash and cash equivalents at end of period	206,874	463,735
Cash paid / (received) during the period for:
Interest - net of amount capitalized	165,480	157,926
Income taxes	0	(20,684)
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	77,388	61,419
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	111,194	103,451
Deferred income taxes, investment tax credits, and non-current taxes accrued	33,499	13,126
Changes in working capital:
Receivables	(9,164)	7,076
Fuel inventory	954	(5,747)
Accounts payable	38,287	9,943
Taxes accrued	(49,438)	(34,195)
Interest accrued	(4,623)	1,399
Deferred fuel costs	(46,714)	(2,840)
Other working capital accounts	(27,684)	135
Changes in provisions for estimated losses	(7,860)	(1,782)
Changes in other regulatory assets	(13,050)	(28,290)
Increase (Decrease) in Regulatory Liabilities	13,520	(11,548)
Changes in pension and other postretirement liabilities	(10,086)	(5,353)
Other Noncash Income (Expense)	15,413	5,628
Net cash flow provided by operating activities	121,636	112,422
INVESTING ACTIVITIES
Construction/capital expenditures	(327,163)	(267,231)
Allowance for equity funds used during construction	3,697	3,027
Payments to Acquire Buildings	0	(28,612)
Change in money pool receivable - net	0	31,382
Decrease in other investments	6	(163)
Net cash flow used in investing activities	(323,460)	(261,597)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	200,543	165,408
Change in money pool payable - net	482	0
Dividends paid:
Common stock	0	(2,500)
Other	792	4,850
Net cash flow provided by financing activities	201,817	167,758
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(7)	18,583
Cash and cash equivalents at beginning of period	18	51,601
Cash and cash equivalents at end of period	11	70,184
Cash paid / (received) during the period for:
Interest - net of amount capitalized	39,925	31,196
Income taxes	(8,045)	0
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	6,402	16,115
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	36,314	30,701
Deferred income taxes, investment tax credits, and non-current taxes accrued	4,907	1,228
Changes in working capital:
Receivables	(15,306)	5,255
Fuel inventory	725	1,042
Accounts payable	(7,309)	(1,725)
Taxes accrued	948	1,887
Interest accrued	(1,315)	529
Deferred fuel costs	4,423	3,351
Other working capital accounts	(11,944)	(19,793)
Changes in provisions for estimated losses	(40,152)	1,521
Changes in other regulatory assets	35,038	3,508
Increase (Decrease) in Regulatory Liabilities	4,823	(14,151)
Changes in pension and other postretirement liabilities	(7,352)	(7,523)
Other Noncash Income (Expense)	16,986	2,715
Net cash flow provided by operating activities	27,188	24,660
INVESTING ACTIVITIES
Construction/capital expenditures	(94,173)	(114,961)
Allowance for equity funds used during construction	634	4,533
Payments to Acquire Buildings	0	(1,584)
Change in money pool receivable - net	0	(586)
Payments to storm reserve escrow account	(7)	(405)
Receipts from storm reserve escrow account	44,200	0
Changes in securitization account	686	451
Net cash flow used in investing activities	(48,660)	(112,552)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	138,939
Retirement of long-term debt	(5,749)	(25,616)
Change in money pool payable - net	27,684	0
Dividends paid:
Other	(463)	(703)
Net cash flow provided by financing activities	21,472	112,620
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	0	24,728
Cash and cash equivalents at beginning of period	26	6,017
Cash and cash equivalents at end of period	26	30,745
Cash paid / (received) during the period for:
Interest - net of amount capitalized	14,684	13,132
Income taxes	324	3,332
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	94,848	79,575
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	104,523	86,401
Deferred income taxes, investment tax credits, and non-current taxes accrued	5,237	9,470
Changes in working capital:
Receivables	(33,522)	(20,524)
Fuel inventory	3,606	1,222
Accounts payable	1,530	(3,543)
Taxes accrued	(4,057)	(11,390)
Interest accrued	(1,072)	359
Deferred fuel costs	(72,537)	17,226
Other working capital accounts	(3,285)	9,928
Changes in provisions for estimated losses	314	91
Changes in other regulatory assets	43,619	50,347
Increase (Decrease) in Regulatory Liabilities	(2,036)	(23,947)
Changes in pension and other postretirement liabilities	(11,050)	(13,825)
Other Noncash Income (Expense)	(6,583)	(10,842)
Net cash flow provided by operating activities	119,535	170,548
INVESTING ACTIVITIES
Construction/capital expenditures	(401,362)	(495,560)
Allowance for equity funds used during construction	5,115	22,242
Proceeds from Sale of Productive Assets	67,920	0
Change in money pool receivable - net	4,601	3,379
Changes in securitization account	9,955	10,075
Net cash flow used in investing activities	(350,305)	(464,795)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	194,256
Retirement of long-term debt	(170,429)	(43,376)
Change in money pool payable - net	63,437	0
Dividends paid:
Other	5,132	(1,199)
Net cash flow provided by financing activities	(17,801)	323,557
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(248,571)	29,310
Cash and cash equivalents at beginning of period	248,596	12,929
Cash and cash equivalents at end of period	25	42,239
Cash paid / (received) during the period for:
Interest - net of amount capitalized	44,760	44,683
Income taxes	9,710	4,031
Proceeds from Contributions from Parent	85,000	175,000
Dividends Paid, Preferred Stock	(941)	(1,124)
Payments to Acquire Productive Assets	36,534	4,931
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	54,194	57,504
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	101,640	88,343
Deferred income taxes, investment tax credits, and non-current taxes accrued	(3,052)	517
Changes in working capital:
Receivables	(15,877)	18,213
Accounts payable	(3,449)	(18,591)
Taxes accrued	(27,698)	6,020
Interest accrued	(1,102)	(12)
Other working capital accounts	442	(41,850)
Changes in other regulatory assets	60,949	(21,072)
Increase (Decrease) in Regulatory Liabilities	49,033	(21,672)
Changes in pension and other postretirement liabilities	(12,243)	(5,354)
Other Noncash Income (Expense)	(158,386)	22,690
Net cash flow provided by operating activities	44,451	84,736
INVESTING ACTIVITIES
Construction/capital expenditures	(38,268)	(147,889)
Allowance for equity funds used during construction	2,466	6,784
Nuclear fuel purchases	(11,039)	(75,024)
Payments for Nuclear Fuel	(11,039)	(75,024)
Proceeds from sale of nuclear fuel	12,754	9,573
Change in money pool receivable - net	(56,107)	59,298
Proceeds from nuclear decommissioning trust fund sales	418,042	275,563
Investment in nuclear decommissioning trust funds	(414,525)	(286,018)
Net cash flow used in investing activities	(86,677)	(157,713)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	453,981	482,533
Retirement of long-term debt	(509,002)	(434,104)
Change in money pool payable - net	0	15,774
Dividends paid:
Common stock	(26,000)	(59,653)
Net cash flow provided by financing activities	(81,021)	4,550
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(123,247)	(68,427)
Cash and cash equivalents at beginning of period	242,469	68,534
Cash and cash equivalents at end of period	119,222	107
Cash paid / (received) during the period for:
Interest - net of amount capitalized	29,231	8,589
Income taxes	$ 39,085	$ (4,000)