Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Consolidated net income	$ 258,646	$ 136,200
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	530,224	525,181
Deferred income taxes, investment tax credits, and non-current taxes accrued	104,884	104,607
Impairment of Long-Lived Assets Held-for-use	25,462	25,800
Changes in working capital:
Receivables	39,697	131,150
Fuel inventory	(4,401)	(16,261)
Accounts payable	(63,613)	(68,857)
Taxes accrued	(44,083)	(56,301)
Interest accrued	(20,546)	(10,011)
Deferred fuel costs	20,201	(76,238)
Other working capital accounts	(42,016)	(28,004)
Changes in provisions for estimated losses	13,720	10,744
Changes in other regulatory assets	(162,192)	84,349
Increase (Decrease) in Regulatory Liabilities	130,924	(31,380)
Changes in pensions and other postretirement liabilities	(7,713)	(97,418)
Other Noncash Income (Expense)	(278,005)	(76,168)
Net cash flow provided by operating activities	501,189	557,393
INVESTING ACTIVITIES
Construction/capital expenditures	(951,629)	(931,479)
Allowance for equity funds used during construction	38,322	28,512
Nuclear fuel purchases	(38,445)	(49,647)
Payments for Nuclear Fuel	(38,445)	(49,647)
Payments to storm reserve escrow account	(2,285)	(1,175)
Decrease (increase) in other investments	39,045	(406)
Proceeds from nuclear decommissioning trust fund sales	1,307,547	1,091,332
Investment in nuclear decommissioning trust funds	(1,342,429)	(1,106,094)
Proceeds from insurance	0	1,582
Changes in securitization account	(1,084)	(7,063)
Net cash flow used in investing activities	(950,958)	(974,438)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	3,444,230	2,505,726
Common stock and treasury stock	35,577	1,952
Retirement of long-term debt	(2,298,855)	(734,000)
Changes in credit borrowings and commercial paper - net	(17)	(773,177)
Payments for Repurchase of Preferred Stock and Preference Stock	50,000	0
Dividends paid:
Common stock	(172,591)	(160,887)
Preferred stock	(4,109)	(3,439)
Other	(1,945)	5,193
Net cash flow provided by financing activities	952,290	841,368
Net increase in cash and cash equivalents	502,521	424,323
Cash and cash equivalents at beginning of period	480,975	781,273
Cash and cash equivalents at end of period	983,496	1,205,596
Cash paid / (received) during the period for:
Interest - net of amount capitalized	214,935	185,606
Income taxes	(13,844)	(4,297)
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	39,121	36,255
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	117,255	115,976
Deferred income taxes, investment tax credits, and non-current taxes accrued	30,756	11,877
Changes in working capital:
Receivables	22,194	31,033
Fuel inventory	260	(13,868)
Accounts payable	(56,432)	(26,924)
Taxes accrued	(10,616)	10,072
Interest accrued	12,661	9,748
Deferred fuel costs	44,926	1,971
Other working capital accounts	1,599	5,591
Changes in provisions for estimated losses	9,930	6,520
Changes in other regulatory assets	(56,263)	13,835
Increase (Decrease) in Regulatory Liabilities	53,386	(13,546)
Changes in pensions and other postretirement liabilities	(910)	(19,277)
Other Noncash Income (Expense)	(1,400)	10,627
Net cash flow provided by operating activities	206,467	179,890
INVESTING ACTIVITIES
Construction/capital expenditures	(147,214)	(167,485)
Allowance for equity funds used during construction	3,506	4,143
Change in money pool receivable - net	(30,521)	0
Nuclear fuel purchases	(214)	(19,391)
Payments for Nuclear Fuel	(214)	(19,391)
Proceeds from sale of nuclear fuel	22,834	30,907
Decrease (increase) in other investments	1	0
Proceeds from nuclear decommissioning trust fund sales	34,423	34,865
Investment in nuclear decommissioning trust funds	(40,223)	(40,238)
Changes in securitization account	(3,553)	(4,145)
Net cash flow used in investing activities	(160,961)	(161,344)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	603,655	175,000
Retirement of long-term debt	(275,904)	(149,904)
Change in money pool payable - net	(182,738)	(42,279)
Changes in credit borrowings and commercial paper - net	0	(6,087)
Dividends paid:
Preferred stock	0	(357)
Other	(397)	(212)
Net cash flow provided by financing activities	144,616	(23,839)
Net increase in cash and cash equivalents	190,122	(5,293)
Cash and cash equivalents at beginning of period	119	6,216
Cash and cash equivalents at end of period	190,241	923
Cash paid / (received) during the period for:
Interest - net of amount capitalized	19,458	18,761
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	127,633	111,593
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	153,368	157,887
Deferred income taxes, investment tax credits, and non-current taxes accrued	49,041	86,443
Changes in working capital:
Receivables	(849)	53,786
Fuel inventory	31	(1,402)
Accounts payable	(26,475)	(18,036)
Taxes accrued	16,311	(24,705)
Interest accrued	(9,300)	6,365
Deferred fuel costs	(50,620)	(52,090)
Other working capital accounts	(41,481)	(55)
Changes in provisions for estimated losses	2,962	(481)
Changes in other regulatory assets	(91,490)	28,579
Increase (Decrease) in Regulatory Liabilities	49,352	(6,088)
Changes in pensions and other postretirement liabilities	(1,954)	(18,075)
Other Noncash Income (Expense)	3,054	4,319
Net cash flow provided by operating activities	179,583	328,040
INVESTING ACTIVITIES
Construction/capital expenditures	(401,573)	(469,398)
Allowance for equity funds used during construction	23,914	17,745
Change in money pool receivable - net	8,880	(170,163)
Nuclear fuel purchases	(59,422)	(9,997)
Payments for Nuclear Fuel	(59,422)	(9,997)
Proceeds from sale of nuclear fuel	0	36,301
Payments to storm reserve escrow account	(1,651)	(853)
Proceeds from nuclear decommissioning trust fund sales	101,555	125,453
Investment in nuclear decommissioning trust funds	(107,690)	(137,097)
Proceeds from insurance	0	1,582
Changes in securitization account	(5,405)	(7,523)
Net cash flow used in investing activities	(441,392)	(613,950)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	1,212,989	947,038
Retirement of long-term debt	(642,307)	(154,117)
Changes in credit borrowings and commercial paper - net	0	19,382
Dividends paid:
Common stock	(49,000)	0
Other	1,926	(14)
Net cash flow provided by financing activities	523,608	812,289
Net increase in cash and cash equivalents	261,799	526,379
Cash and cash equivalents at beginning of period	43,364	35,907
Cash and cash equivalents at end of period	305,163	562,286
Cash paid / (received) during the period for:
Interest - net of amount capitalized	81,940	61,613
Income taxes	0	(2,973)
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	15,398	22,843
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	39,088	38,182
Deferred income taxes, investment tax credits, and non-current taxes accrued	12,072	7,787
Changes in working capital:
Receivables	18,364	1,018
Fuel inventory	(4,267)	(767)
Accounts payable	(5,722)	(24,818)
Taxes accrued	(66,445)	(56,244)
Interest accrued	(293)	(5,548)
Deferred fuel costs	17,635	13,817
Other working capital accounts	3,444	(4,856)
Changes in provisions for estimated losses	(846)	4,754
Changes in other regulatory assets	(3,478)	4,586
Increase (Decrease) in Regulatory Liabilities	(9,301)	766
Changes in pensions and other postretirement liabilities	269	(4,604)
Other Noncash Income (Expense)	(5,926)	(5,757)
Net cash flow provided by operating activities	9,992	(8,841)
INVESTING ACTIVITIES
Construction/capital expenditures	(97,487)	(79,141)
Allowance for equity funds used during construction	1,913	1,978
Change in money pool receivable - net	41,380	1,633
Decrease (increase) in other investments	(182)	(738)
Net cash flow used in investing activities	(54,376)	(76,268)
Proceeds from the issuance of:
Change in money pool payable - net	10,925	74,892
Dividends paid:
Preferred stock	0	(238)
Other	(2,610)	4,662
Net cash flow provided by financing activities	8,315	79,316
Net increase in cash and cash equivalents	(36,069)	(5,793)
Cash and cash equivalents at beginning of period	36,954	6,096
Cash and cash equivalents at end of period	885	303
Cash paid / (received) during the period for:
Interest - net of amount capitalized	14,193	18,820
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income	9,023	10,882
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	14,164	13,747
Deferred income taxes, investment tax credits, and non-current taxes accrued	9,743	17,909
Changes in working capital:
Receivables	(20)	3,378
Fuel inventory	1,529	951
Accounts payable	8,298	(7,973)
Taxes accrued	(4,443)	(13,351)
Interest accrued	650	(81)
Deferred fuel costs	(71)	(11,309)
Other working capital accounts	(15,144)	(12,082)
Changes in provisions for estimated losses	454	196
Changes in other regulatory assets	(16,528)	7,226
Increase (Decrease) in Regulatory Liabilities	(8,634)	1,331
Changes in pensions and other postretirement liabilities	(1,706)	(3,686)
Other Noncash Income (Expense)	19,207	(89)
Net cash flow provided by operating activities	16,522	7,049
INVESTING ACTIVITIES
Construction/capital expenditures	(57,788)	(41,105)
Allowance for equity funds used during construction	2,290	851
Change in money pool receivable - net	22,016	12,291
Payments to storm reserve escrow account	(451)	(232)
Receipts from storm reserve escrow account	0	3
Changes in securitization account	(2,850)	(3,381)
Net cash flow used in investing activities	(36,783)	(31,573)
Proceeds from the issuance of:
Change in money pool payable - net	1,877	0
Dividends paid:
Common stock	0	(6,250)
Other	(499)	(607)
Net cash flow provided by financing activities	1,378	(6,857)
Net increase in cash and cash equivalents	(18,883)	(31,381)
Cash and cash equivalents at beginning of period	19,677	32,741
Cash and cash equivalents at end of period	794	1,360
Cash paid / (received) during the period for:
Interest - net of amount capitalized	5,027	5,098
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	21,342	17,350
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	37,037	30,766
Deferred income taxes, investment tax credits, and non-current taxes accrued	(10,123)	(21,607)
Changes in working capital:
Receivables	65,394	9,190
Fuel inventory	(173)	(134)
Accounts payable	(57,447)	(24,653)
Taxes accrued	(9,465)	3,981
Interest accrued	(4,638)	(5,575)
Deferred fuel costs	8,331	(28,626)
Other working capital accounts	(913)	4,788
Changes in provisions for estimated losses	1,074	(208)
Changes in other regulatory assets	1,358	20,497
Increase (Decrease) in Regulatory Liabilities	(24,365)	5,145
Changes in pensions and other postretirement liabilities	(1,120)	(6,851)
Other Noncash Income (Expense)	16,359	(3,015)
Net cash flow provided by operating activities	42,651	1,048
INVESTING ACTIVITIES
Construction/capital expenditures	(176,186)	(94,123)
Allowance for equity funds used during construction	5,111	1,696
Change in money pool receivable - net	(3,571)	32,313
Changes in securitization account	10,724	7,985
Net cash flow used in investing activities	(163,922)	(52,129)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	692,633	0
Retirement of long-term debt	(525,841)	(24,977)
Change in money pool payable - net	(22,389)	0
Dividends paid:
Other	(959)	(479)
Net cash flow provided by financing activities	143,444	(25,456)
Net increase in cash and cash equivalents	22,173	(76,537)
Cash and cash equivalents at beginning of period	56	115,513
Cash and cash equivalents at end of period	22,229	38,976
Cash paid / (received) during the period for:
Interest - net of amount capitalized	26,002	26,939
Income taxes	0	(1,624)
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	23,578	22,308
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	53,731	66,323
Deferred income taxes, investment tax credits, and non-current taxes accrued	4,975	7,929
Changes in working capital:
Receivables	(7,613)	5,883
Accounts payable	(5,182)	(9,632)
Taxes accrued	(13,575)	(15,033)
Interest accrued	(3,150)	736
Other working capital accounts	3,635	(5,874)
Changes in other regulatory assets	(3,730)	(1,960)
Increase (Decrease) in Regulatory Liabilities	70,486	(18,988)
Changes in pensions and other postretirement liabilities	319	(3,537)
Other Noncash Income (Expense)	(65,757)	17,216
Net cash flow provided by operating activities	57,717	65,371
INVESTING ACTIVITIES
Construction/capital expenditures	(25,557)	(30,707)
Allowance for equity funds used during construction	1,589	2,100
Change in money pool receivable - net	81,635	21,531
Nuclear fuel purchases	(3)	(74,257)
Payments for Nuclear Fuel	(3)	(74,257)
Proceeds from sale of nuclear fuel	18,280	0
Proceeds from nuclear decommissioning trust fund sales	56,988	54,210
Investment in nuclear decommissioning trust funds	(62,223)	(58,833)
Net cash flow used in investing activities	70,709	(85,956)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	529,493	100,000
Retirement of long-term debt	(549,803)	(50,002)
Changes in credit borrowings and commercial paper - net	0	25,339
Dividends paid:
Common stock	(45,500)	(63,240)
Net cash flow provided by financing activities	(65,810)	12,097
Net increase in cash and cash equivalents	62,616	(8,488)
Cash and cash equivalents at beginning of period	95,685	287,187
Cash and cash equivalents at end of period	158,301	278,699
Cash paid / (received) during the period for:
Interest - net of amount capitalized	$ 12,461	$ 8,592