Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Proceeds from Sale of Productive Assets	$ 0	$ 19,801
OPERATING ACTIVITIES
Consolidated net income	1,014,105	868,639
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	1,694,904	1,634,677
Deferred income taxes, investment tax credits, and non-current taxes accrued	320,726	373,723
Impairment of Long-Lived Assets Held-for-use	16,117	225,175
Changes in working capital:
Receivables	(200,990)	(231,005)
Fuel inventory	(608)	(14,399)
Accounts payable	174,083	(175,246)
Taxes accrued	206,769	(2,420)
Interest accrued	10,866	(2,314)
Deferred fuel costs	(48,162)	90,319
Other working capital accounts	(114,492)	(19,232)
Changes in provisions for estimated losses	(38,029)	14,114
Changes in other regulatory assets	(130,533)	(92,861)
Increase (Decrease) in Regulatory Liabilities	(38,371)	(19,115)
Changes in pension and other postretirement liabilities	(270,144)	(132,044)
Other Noncash Income (Expense)	(226,075)	(400,064)
Net cash flow provided by operating activities	2,370,166	2,117,947
INVESTING ACTIVITIES
Construction/capital expenditures	(3,175,559)	(3,079,726)
Allowance for equity funds used during construction	89,238	108,867
Payments to Acquire Buildings	(24,633)	0
Nuclear fuel purchases	(177,385)	(55,176)
Payments for Nuclear Fuel	(177,385)	(55,176)
Payments to storm reserve escrow account	(2,244)	(6,184)
Receipts from storm reserve escrow account	40,647	0
Decrease (increase) in other investments	(9,821)	30,370
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	67,252	2,369
Proceeds from nuclear decommissioning trust fund sales	1,597,492	3,518,616
Investment in nuclear decommissioning trust funds	(1,661,660)	(3,566,690)
Proceeds from insurance	0	7,040
Changes in securitization account	791	(4,213)
Net cash flow used in investing activities	(3,255,882)	(3,024,926)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	8,170,607	7,133,571
Proceeds from Sale of Treasury Stock	41,784	89,303
Proceeds from Issuance of Common Stock	0	607,650
Retirement of long-term debt	(5,386,227)	(5,859,714)
Payments for Repurchase of Preferred Stock and Preference Stock	0	50,000
Changes in credit borrowings and commercial paper - net	(548,522)	(24,550)
Dividends paid:
Common stock	(558,121)	(526,408)
Other	(5,941)	(9,175)
Net cash flow provided by financing activities	1,699,658	1,381,835
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	813,942	474,856
Cash and cash equivalents at beginning of period	425,722	480,975
Cash and cash equivalents at end of period	1,239,664	955,831
Cash paid / (received) during the period for:
Interest - net of amount capitalized	599,683	584,622
Income taxes	(2,484)	(8,649)
Dividends Paid, Preferred Stock	(13,922)	(12,328)
Proceeds from Issuance of Preferred Stock and Preference Stock	0	33,486
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	240,608	239,136
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	366,549	351,390
Deferred income taxes, investment tax credits, and non-current taxes accrued	79,948	85,246
Changes in working capital:
Receivables	(73,890)	(70,395)
Fuel inventory	4,761	(5,350)
Accounts payable	(26,547)	(24,766)
Taxes accrued	(10,733)	(18,608)
Interest accrued	18,125	20,206
Deferred fuel costs	3,203	52,468
Other working capital accounts	(9,027)	44,803
Changes in provisions for estimated losses	3,508	8,841
Changes in other regulatory assets	(50,262)	(55,749)
Increase (Decrease) in Regulatory Liabilities	(484)	32,537
Changes in pension and other postretirement liabilities	(31,245)	(26,136)
Other Noncash Income (Expense)	(2,562)	(57,011)
Net cash flow provided by operating activities	511,952	576,612
INVESTING ACTIVITIES
Construction/capital expenditures	(593,249)	(488,487)
Allowance for equity funds used during construction	10,671	11,016
Payments to Acquire Buildings	(5,988)	0
Nuclear fuel purchases	(72,601)	(26,732)
Payments for Nuclear Fuel	(72,601)	(26,732)
Proceeds from sale of nuclear fuel	30,638	22,834
Change in money pool receivable - net	(51,697)	(6,896)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	55,001	0
Change in other investments	0	1
Proceeds from nuclear decommissioning trust fund sales	254,847	199,031
Investment in nuclear decommissioning trust funds	(266,397)	(214,205)
Changes in securitization account	4,036	(3,238)
Net cash flow used in investing activities	(634,739)	(506,676)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	1,058,977	781,510
Retirement of long-term debt	(298,071)	(473,827)
Change in money pool payable - net	(21,634)	(182,738)
Dividends paid:
Common stock	(25,000)	(115,000)
Other	2,900	(2,931)
Net cash flow provided by financing activities	717,172	7,014
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	594,385	76,950
Cash and cash equivalents at beginning of period	3,519	119
Cash and cash equivalents at end of period	597,904	77,069
Cash paid / (received) during the period for:
Interest - net of amount capitalized	86,906	80,644
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	583,321	565,977
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	591,045	498,397
Deferred income taxes, investment tax credits, and non-current taxes accrued	56,767	174,825
Changes in working capital:
Receivables	(100,718)	(72,018)
Fuel inventory	(3,845)	(1,752)
Accounts payable	169,577	(40,131)
Taxes accrued	148,379	78,910
Interest accrued	(4,220)	5,102
Deferred fuel costs	(61,732)	(11,459)
Other working capital accounts	(33,691)	(62,332)
Changes in provisions for estimated losses	(42,624)	9,748
Changes in other regulatory assets	(129,843)	(103,635)
Increase (Decrease) in Regulatory Liabilities	(19,761)	(26,115)
Changes in pension and other postretirement liabilities	(49,168)	(15,761)
Other Noncash Income (Expense)	10,087	(37,313)
Net cash flow provided by operating activities	1,113,574	962,443
INVESTING ACTIVITIES
Construction/capital expenditures	(1,064,765)	(1,277,108)
Allowance for equity funds used during construction	27,197	59,194
Payments to Acquire Buildings	(14,511)	0
Nuclear fuel purchases	(76,392)	(63,157)
Payments for Nuclear Fuel	(76,392)	(63,157)
Proceeds from sale of nuclear fuel	35,041	11,608
Change in money pool receivable - net	(21,649)	35,485
Payments to storm reserve escrow account	(1,467)	(5,013)
Receipts from storm reserve escrow account	40,601	0
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	5,090	0
Proceeds from nuclear decommissioning trust fund sales	281,131	307,164
Investment in nuclear decommissioning trust funds	(301,170)	(331,138)
Proceeds from insurance	0	7,040
Changes in securitization account	(5,925)	(6,467)
Net cash flow used in investing activities	(1,096,819)	(1,260,023)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	1,800,392	2,332,003
Retirement of long-term debt	(1,453,564)	(1,798,014)
Change in money pool payable - net	(82,826)	0
Dividends paid:
Common stock	(21,500)	(155,000)
Other	(9,100)	3,272
Net cash flow provided by financing activities	233,402	382,261
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	250,157	84,681
Cash and cash equivalents at beginning of period	2,006	43,364
Cash and cash equivalents at end of period	252,163	128,045
Cash paid / (received) during the period for:
Interest - net of amount capitalized	246,456	219,323
Income taxes	(20,684)	0
Payment For Proceed From Other Investing Activities	0	2,369
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	120,008	98,302
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	155,937	123,145
Deferred income taxes, investment tax credits, and non-current taxes accrued	34,848	32,596
Changes in working capital:
Receivables	(21,376)	(37,843)
Fuel inventory	(359)	(3,872)
Accounts payable	5,863	(574)
Taxes accrued	(10,366)	(26,556)
Interest accrued	9,075	2,093
Deferred fuel costs	(45,998)	47,569
Other working capital accounts	(7,372)	533
Changes in provisions for estimated losses	(28)	(3,099)
Changes in other regulatory assets	(31,987)	(923)
Increase (Decrease) in Regulatory Liabilities	(10,592)	(16,615)
Changes in pension and other postretirement liabilities	(11,451)	(6,930)
Other Noncash Income (Expense)	14,071	(4,387)
Net cash flow provided by operating activities	200,273	203,439
INVESTING ACTIVITIES
Construction/capital expenditures	(393,887)	(314,622)
Allowance for equity funds used during construction	4,820	6,341
Payments to Acquire Buildings	(28,612)	0
Change in money pool receivable - net	40,972	32,481
Decrease (increase) in other investments	1,729	(507)
Net cash flow used in investing activities	(374,978)	(276,307)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	165,399	292,763
Retirement of long-term debt	0	(150,000)
Dividends paid:
Common stock	(7,500)	0
Other	8,243	(7,913)
Net cash flow provided by financing activities	166,142	134,850
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(8,563)	61,982
Cash and cash equivalents at beginning of period	51,601	36,954
Cash and cash equivalents at end of period	43,038	98,936
Cash paid / (received) during the period for:
Interest - net of amount capitalized	40,551	41,753
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	35,565	46,934
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	46,835	43,146
Deferred income taxes, investment tax credits, and non-current taxes accrued	10,382	20,427
Changes in working capital:
Receivables	(10,892)	(14,741)
Fuel inventory	190	(374)
Accounts payable	1,841	(11,654)
Taxes accrued	(2,283)	242
Interest accrued	(335)	14
Deferred fuel costs	(5,629)	8,328
Other working capital accounts	(14,122)	(8,737)
Changes in provisions for estimated losses	1,356	1,423
Changes in other regulatory assets	2,196	(14,435)
Increase (Decrease) in Regulatory Liabilities	(13,389)	(15,371)
Changes in pension and other postretirement liabilities	(10,373)	(5,784)
Other Noncash Income (Expense)	4,755	28,015
Net cash flow provided by operating activities	46,097	77,433
INVESTING ACTIVITIES
Construction/capital expenditures	(174,011)	(162,177)
Allowance for equity funds used during construction	5,443	7,769
Payments to Acquire Buildings	(1,584)	0
Change in money pool receivable - net	5,191	22,016
Payments to storm reserve escrow account	(428)	(1,382)
Changes in securitization account	(4,176)	(3,043)
Net cash flow used in investing activities	(169,565)	(136,817)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	138,930	0
Retirement of long-term debt	(25,616)	(5,420)
Change in money pool payable - net	5,089	46,318
Dividends paid:
Other	(920)	(1,165)
Net cash flow provided by financing activities	117,483	39,733
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(5,985)	(19,651)
Cash and cash equivalents at beginning of period	6,017	19,677
Cash and cash equivalents at end of period	32	26
Cash paid / (received) during the period for:
Interest - net of amount capitalized	21,203	17,211
Income taxes	3,332	(4,899)
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	171,739	133,502
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	131,596	113,071
Deferred income taxes, investment tax credits, and non-current taxes accrued	37,072	21,898
Changes in working capital:
Receivables	(55,059)	21,578
Fuel inventory	(1,726)	(1,476)
Accounts payable	15,542	(58,792)
Taxes accrued	(12,623)	3,545
Interest accrued	(7,855)	(11,478)
Deferred fuel costs	61,995	(6,588)
Other working capital accounts	(8,382)	(13,740)
Changes in provisions for estimated losses	(69)	(3,470)
Changes in other regulatory assets	42,904	63,793
Increase (Decrease) in Regulatory Liabilities	(39,791)	(83,674)
Changes in pension and other postretirement liabilities	(18,179)	(7,209)
Other Noncash Income (Expense)	(22,911)	3,921
Net cash flow provided by operating activities	294,253	174,881
INVESTING ACTIVITIES
Construction/capital expenditures	(703,650)	(622,342)
Allowance for equity funds used during construction	33,117	19,029
Payments to Acquire Buildings	(4,931)	0
Change in money pool receivable - net	11,181	(8,299)
Changes in securitization account	6,856	8,535
Net cash flow used in investing activities	(657,427)	(603,077)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(1,594)	0
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	344,110	986,477
Retirement of long-term debt	(216,266)	(563,246)
Change in money pool payable - net	54,229	(22,389)
Dividends paid:
Other	(5,200)	(1,410)
Net cash flow provided by financing activities	350,279	520,418
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(12,895)	92,222
Cash and cash equivalents at beginning of period	12,929	56
Cash and cash equivalents at end of period	34	92,278
Cash paid / (received) during the period for:
Interest - net of amount capitalized	75,129	73,752
Income taxes	8,331	2,292
Proceeds from Contributions from Parent	175,000	87,500
Proceeds from Issuance of Preferred Stock and Preference Stock	0	33,486
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	88,568	73,081
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	137,201	163,069
Deferred income taxes, investment tax credits, and non-current taxes accrued	(272,383)	(2,426)
Changes in working capital:
Receivables	15,637	(7,456)
Accounts payable	(19,775)	2,935
Taxes accrued	431,677	14,579
Interest accrued	(188)	(1,478)
Other working capital accounts	(40,566)	3,411
Changes in other regulatory assets	(25,956)	(9,121)
Increase (Decrease) in Regulatory Liabilities	45,647	90,118
Changes in pension and other postretirement liabilities	(11,033)	(5,013)
Other Noncash Income (Expense)	(189,529)	(97,024)
Net cash flow provided by operating activities	159,300	224,675
INVESTING ACTIVITIES
Construction/capital expenditures	(169,475)	(92,228)
Allowance for equity funds used during construction	7,990	5,518
Nuclear fuel purchases	(85,483)	(2,046)
Payments for Nuclear Fuel	(85,483)	(2,046)
Proceeds from sale of nuclear fuel	19,444	26,272
Change in money pool receivable - net	58,277	92,347
Proceeds from nuclear decommissioning trust fund sales	322,982	348,606
Investment in nuclear decommissioning trust funds	(333,002)	(362,573)
Net cash flow used in investing activities	(179,267)	15,896
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	859,727	1,007,775
Retirement of long-term debt	(815,710)	(1,069,206)
Dividends paid:
Common stock	(80,653)	(110,500)
Net cash flow provided by financing activities	(36,636)	(171,931)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(56,603)	68,640
Cash and cash equivalents at beginning of period	68,534	95,685
Cash and cash equivalents at end of period	11,931	164,325
Cash paid / (received) during the period for:
Interest - net of amount capitalized	17,178	21,052
Income taxes	$ (4,000)	$ 0