Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
OPERATING ACTIVITIES
Consolidated net income	$ 279,593	$ 339,145
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	561,731	580,571
Deferred income taxes, investment tax credits, and non-current taxes accrued	70,780	240,431
Impairment of Long-Lived Assets Held-for-use	744	3,278
Changes in working capital:
Receivables	122,987	(52,690)
Fuel inventory	14,795	26,878
Accounts payable	(283,175)	(175,651)
Taxes accrued	(79,941)	(231,182)
Interest accrued	32,862	(3,778)
Deferred fuel costs	(58,932)	(353,099)
Other working capital accounts	(95,033)	(43,582)
Changes in provisions for estimated losses	8,206	(60,923)
Changes in other regulatory assets	(1,424,270)	89,910
Increase (Decrease) in Regulatory Liabilities	(250,358)	(14,464)
Storm restoration costs approved for securitization recognized as regulatory asset	1,491,942	0
Changes in pension and other postretirement liabilities	(101,641)	(166,733)
Other Noncash Income (Expense)	247,676	(227,676)
Net cash flow provided by (used in) operating activities	537,966	(49,565)
INVESTING ACTIVITIES
Construction/capital expenditures	(1,501,578)	(1,552,103)
Allowance for equity funds used during construction	15,871	14,577
Nuclear fuel purchases	(83,326)	(47,916)
Payments for Nuclear Fuel	(83,326)	(47,916)
Proceeds from insurance	9,829	0
Payments to storm reserve escrow account	0	(10)
Receipts from storm reserve escrow account	0	44,205
Decrease (increase) in other investments	(11,862)	12,521
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	32,367	15,735
Proceeds from nuclear decommissioning trust fund sales	479,937	3,225,510
Investment in nuclear decommissioning trust funds	(505,989)	(3,224,487)
Changes in securitization account	13,532	(1,304)
Net cash flow used in investing activities	(1,551,219)	(1,513,272)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	2,553,369	3,676,242
Proceeds from Sale of Treasury Stock	9,629	979
Retirement of long-term debt	(1,224,091)	(1,346,172)
Changes in credit borrowings and commercial paper - net	141,634	(599,860)
Dividends paid:
Common stock	(205,058)	(190,595)
Other	1,382	10,380
Net cash flow provided by financing activities	1,272,285	1,546,394
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	259,032	(16,443)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	701,591	1,742,656
Cash paid / (received) during the period for:
Interest - net of amount capitalized	186,269	202,451
Income taxes	(11,505)	9,015
Dividends Paid, Preferred Stock	(4,580)	(4,580)
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	65,567	93,037
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	133,634	126,630
Deferred income taxes, investment tax credits, and non-current taxes accrued	11,776	42,885
Changes in working capital:
Receivables	23,583	(56,256)
Fuel inventory	7,199	17,930
Accounts payable	(33,409)	(21,622)
Taxes accrued	27,209	8,365
Interest accrued	32,233	18,837
Deferred fuel costs	(16,954)	(55,704)
Other working capital accounts	3,794	(8,025)
Changes in provisions for estimated losses	(309)	(12,383)
Changes in other regulatory assets	(7,198)	42,388
Increase (Decrease) in Regulatory Liabilities	(91,068)	(38,604)
Changes in pension and other postretirement liabilities	(19,852)	(25,116)
Other Noncash Income (Expense)	111,221	(40,789)
Net cash flow provided by (used in) operating activities	247,426	91,573
INVESTING ACTIVITIES
Construction/capital expenditures	(162,108)	(146,334)
Allowance for equity funds used during construction	3,055	2,993
Nuclear fuel purchases	(27,258)	(17,621)
Payments for Nuclear Fuel	(27,258)	(17,621)
Proceeds from sale of nuclear fuel	37,157	16,059
Change in money pool receivable - net	(59,981)	(12,500)
Proceeds from nuclear decommissioning trust fund sales	64,608	143,575
Investment in nuclear decommissioning trust funds	(69,950)	(148,783)
Net cash flow used in investing activities	(214,477)	(162,611)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	212,060	604,760
Retirement of long-term debt	(7,506)	(613,706)
Change in money pool payable - net	(139,904)	0
Dividends paid:
Other	(483)	11,636
Net cash flow provided by financing activities	64,167	2,690
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	97,116	(68,348)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	110,031	123,780
Cash paid / (received) during the period for:
Interest - net of amount capitalized	3,227	14,359
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	150,860	166,626
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	213,022	198,868
Deferred income taxes, investment tax credits, and non-current taxes accrued	95,785	67,823
Changes in working capital:
Receivables	71,237	(13,080)
Fuel inventory	(46)	1,194
Accounts payable	(262,042)	(126,070)
Taxes accrued	(42,950)	20,619
Interest accrued	(857)	(9,163)
Deferred fuel costs	498	(203,815)
Other working capital accounts	(24,241)	(25,628)
Changes in provisions for estimated losses	2,694	(258)
Changes in other regulatory assets	(1,336,616)	(70,784)
Increase (Decrease) in Regulatory Liabilities	(67,164)	22,503
Storm restoration costs approved for securitization recognized as regulatory asset	1,338,559	0
Changes in pension and other postretirement liabilities	(11,608)	(30,745)
Other Noncash Income (Expense)	55,995	(52,688)
Net cash flow provided by (used in) operating activities	183,126	(54,598)
INVESTING ACTIVITIES
Construction/capital expenditures	(935,692)	(945,831)
Allowance for equity funds used during construction	6,726	6,101
Nuclear fuel purchases	(55,913)	(52,435)
Payments for Nuclear Fuel	(55,913)	(52,435)
Proceeds from sale of nuclear fuel	26,681	0
Change in money pool receivable - net	(66,621)	(62,346)
Proceeds from insurance	5,695	0
Decrease (increase) in other investments	17	0
Proceeds from nuclear decommissioning trust fund sales	155,269	291,275
Investment in nuclear decommissioning trust funds	(168,283)	(329,180)
Changes in securitization account	0	(6,050)
Net cash flow used in investing activities	(1,032,121)	(1,098,466)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	1,506,637	1,399,245
Retirement of long-term debt	(401,411)	(368,707)
Dividends paid:
Common stock	(125,000)	0
Other	6,843	(3,678)
Net cash flow provided by financing activities	987,069	1,026,860
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	138,074	(126,204)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	156,647	601,816
Cash paid / (received) during the period for:
Interest - net of amount capitalized	91,441	89,432
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	30,355	25,972
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	60,084	55,036
Deferred income taxes, investment tax credits, and non-current taxes accrued	3,979	22,593
Changes in working capital:
Receivables	(6,379)	4,557
Fuel inventory	23	1,736
Accounts payable	989	26,391
Taxes accrued	(63,785)	(75,886)
Interest accrued	10,613	4,238
Deferred fuel costs	(24,076)	(25,722)
Other working capital accounts	(46,494)	(3,425)
Changes in provisions for estimated losses	(179)	(7,689)
Changes in other regulatory assets	16,301	11,015
Increase (Decrease) in Regulatory Liabilities	21,689	19,147
Changes in pension and other postretirement liabilities	(3,906)	(5,668)
Other Noncash Income (Expense)	(3,554)	2,016
Net cash flow provided by (used in) operating activities	(4,340)	54,311
INVESTING ACTIVITIES
Construction/capital expenditures	(102,686)	(154,788)
Allowance for equity funds used during construction	1,078	1,668
Change in money pool receivable - net	40,456	(9,683)
Decrease (increase) in other investments	(2)	1
Net cash flow used in investing activities	(61,154)	(162,802)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	200,573
Change in money pool payable - net	22,386	(16,516)
Dividends paid:
Other	(4,491)	1,132
Net cash flow provided by financing activities	17,895	185,189
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(47,599)	76,698
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	28	76,716
Cash paid / (received) during the period for:
Interest - net of amount capitalized	9,160	12,757
Income taxes	0	(8,045)
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	15,126	1,771
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	19,815	18,161
Deferred income taxes, investment tax credits, and non-current taxes accrued	9,558	4,572
Changes in working capital:
Receivables	39,328	(1,975)
Fuel inventory	446	2,234
Accounts payable	(14,168)	(27,777)
Taxes accrued	(2,803)	13
Interest accrued	(613)	(3,203)
Deferred fuel costs	(9,959)	(4,886)
Other working capital accounts	(10,876)	(11,103)
Changes in provisions for estimated losses	6,224	(40,680)
Changes in other regulatory assets	25,499	28,879
Increase (Decrease) in Regulatory Liabilities	(16,667)	8,728
Changes in pension and other postretirement liabilities	(2,782)	(4,397)
Other Noncash Income (Expense)	(16,317)	15,549
Net cash flow provided by (used in) operating activities	41,811	(14,114)
INVESTING ACTIVITIES
Construction/capital expenditures	(68,959)	(26,165)
Allowance for equity funds used during construction	369	258
Change in money pool receivable - net	18,288	0
Payments to storm reserve escrow account	0	(3)
Receipts from storm reserve escrow account	0	44,200
Changes in securitization account	(3,099)	(3,415)
Net cash flow used in investing activities	(53,401)	14,875
Proceeds from the issuance of:
Change in money pool payable - net	0	15,039
Dividends paid:
Other	(107)	(214)
Net cash flow provided by financing activities	(107)	14,825
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(11,697)	15,586
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	31,165	15,612
Cash paid / (received) during the period for:
Interest - net of amount capitalized	8,957	9,921
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	50,403	50,058
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	56,061	50,936
Deferred income taxes, investment tax credits, and non-current taxes accrued	(1,175)	(1,522)
Changes in working capital:
Receivables	(1,674)	(16,424)
Fuel inventory	8,039	3,509
Accounts payable	4,492	(42,511)
Taxes accrued	(15,188)	(5,123)
Interest accrued	(11,195)	(10,989)
Deferred fuel costs	(8,440)	(62,970)
Other working capital accounts	4,832	1,118
Changes in provisions for estimated losses	54	(31)
Changes in other regulatory assets	(135,079)	40,484
Increase (Decrease) in Regulatory Liabilities	(11,491)	(13,649)
Storm restoration costs approved for securitization recognized as regulatory asset	153,383	0
Changes in pension and other postretirement liabilities	(4,146)	(5,434)
Other Noncash Income (Expense)	(6,538)	(16,316)
Net cash flow provided by (used in) operating activities	82,338	(28,864)
INVESTING ACTIVITIES
Construction/capital expenditures	(155,948)	(238,903)
Allowance for equity funds used during construction	2,596	2,445
Change in money pool receivable - net	0	4,601
Proceeds from insurance	4,134	0
Decrease (increase) in other investments	(11,949)	0
Changes in securitization account	16,631	8,161
Net cash flow used in investing activities	(144,536)	(223,696)
Proceeds from the issuance of:
Retirement of long-term debt	(29,064)	(27,951)
Change in money pool payable - net	91,799	30,858
Dividends paid:
Other	(34)	1,552
Net cash flow provided by financing activities	62,196	3,989
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(2)	(248,571)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	26	25
Cash paid / (received) during the period for:
Interest - net of amount capitalized	31,513	33,394
Income taxes	(1,913)	(836)
Dividends Paid, Preferred Stock	(505)	(470)
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	31,432	23,864
Adjustments to reconcile consolidated net income to net cash flow provided by (used in) operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	46,566	53,433
Deferred income taxes, investment tax credits, and non-current taxes accrued	(8,690)	(10,197)
Changes in working capital:
Receivables	(3,845)	9,255
Accounts payable	(15,017)	(21,296)
Taxes accrued	5,939	(33,364)
Interest accrued	(475)	(1,088)
Other working capital accounts	(20,646)	2,347
Changes in other regulatory assets	(2,331)	20,923
Increase (Decrease) in Regulatory Liabilities	(85,655)	(12,591)
Changes in pension and other postretirement liabilities	(4,542)	(7,424)
Other Noncash Income (Expense)	97,275	(53,104)
Net cash flow provided by (used in) operating activities	40,011	(29,242)
INVESTING ACTIVITIES
Construction/capital expenditures	(46,509)	(14,890)
Allowance for equity funds used during construction	2,047	1,111
Nuclear fuel purchases	(75,251)	(4,745)
Payments for Nuclear Fuel	(75,251)	(4,745)
Proceeds from sale of nuclear fuel	11,257	12,626
Change in money pool receivable - net	18,606	(12,678)
Proceeds from nuclear decommissioning trust fund sales	62,717	211,481
Investment in nuclear decommissioning trust funds	(67,669)	(216,342)
Net cash flow used in investing activities	(94,802)	(23,437)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	225,956	189,244
Retirement of long-term debt	(162,111)	(225,807)
Dividends paid:
Common stock	0	(21,000)
Net cash flow provided by financing activities	63,845	(57,563)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	9,054	(110,242)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	98,255	132,227
Cash paid / (received) during the period for:
Interest - net of amount capitalized	9,749	10,720
Income taxes	$ 0	$ 39,085