Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Consolidated net income	[1]	$ 136,200	$ 86,051
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		525,181	531,373
Deferred income taxes, investment tax credits, and non-current taxes accrued		104,607	16,497
Impairment of Long-Lived Assets Held-for-use		25,800	145,026
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		0	(16,270)
Changes in working capital:
Receivables		131,150	156,201
Fuel inventory		(16,261)	6,465
Accounts payable		(68,857)	(47,682)
Taxes accrued		(56,301)	(58,832)
Interest accrued		(10,011)	(13,921)
Deferred fuel costs		(76,238)	(7,389)
Other working capital accounts		(28,004)	(7,324)
Changes in provisions for estimated losses		10,744	(4,031)
Changes in other regulatory assets		84,349	47,497
Increase (Decrease) in Regulatory Liabilities		(31,380)	(18,324)
Changes in pensions and other postretirement liabilities		(97,418)	(86,430)
Other Noncash Income (Expense)		(76,168)	(199,514)
Net cash flow provided by operating activities		557,393	529,393
INVESTING ACTIVITIES
Construction/capital expenditures		(931,479)	(794,448)
Allowance for equity funds used during construction		28,512	19,254
Nuclear fuel purchases		(49,647)	(137,613)
Payments for Nuclear Fuel		(49,647)	(137,613)
Payments to storm reserve escrow account		(1,175)	(480)
Receipts from storm reserve escrow account		0	8,836
Increases in other investments		(406)	(10,377)
Proceeds from Sale of Productive Assets		0	100,000
Proceeds from nuclear decommissioning trust fund sales		1,091,332	513,750
Investment in nuclear decommissioning trust funds		(1,106,094)	(556,161)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs		0	25,493
Proceeds from insurance		1,582	20,909
Changes in securitization account		(7,063)	(963)
Net cash flow used in investing activities		(974,438)	(811,800)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt		2,505,726	236,198
Common stock and treasury stock		1,952	2,448
Retirement of long-term debt		(734,000)	(811,690)
Changes in credit borrowings and commercial paper - net		(773,177)	908,378
Dividends paid:
Common stock		(160,887)	(156,073)
Preferred stock	[1]	(3,439)	(3,446)
Other		5,193	1,810
Net cash flow provided by financing activities		841,368	177,625
Net increase (decrease) in cash and cash equivalents		424,323	(104,782)
Cash and cash equivalents at beginning of period		781,273	1,187,844
Cash and cash equivalents at end of period		1,205,596	1,083,062
Cash paid / (received) during the period for:
Interest - net of amount capitalized		185,606	178,134
Income taxes		(4,297)	(18,044)
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income		36,255	14,304
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		115,976	105,721
Deferred income taxes, investment tax credits, and non-current taxes accrued		11,877	16,361
Changes in working capital:
Receivables		31,033	53,355
Fuel inventory		(13,868)	(5,747)
Accounts payable		(26,924)	(73,635)
Taxes accrued		10,072	7,175
Interest accrued		9,748	8,562
Deferred fuel costs		1,971	(9,137)
Other working capital accounts		5,591	15,485
Changes in provisions for estimated losses		6,520	1,997
Changes in other regulatory assets		13,835	1,815
Increase (Decrease) in Regulatory Liabilities		(13,546)	23,435
Changes in pensions and other postretirement liabilities		(19,277)	(19,553)
Other Noncash Income (Expense)		10,627	14,403
Net cash flow provided by operating activities		179,890	154,541
INVESTING ACTIVITIES
Construction/capital expenditures		(167,485)	(165,496)
Allowance for equity funds used during construction		4,143	4,557
Nuclear fuel purchases		(19,391)	(88,537)
Payments for Nuclear Fuel		(19,391)	(88,537)
Proceeds from sale of nuclear fuel		30,907	51,029
Proceeds from nuclear decommissioning trust fund sales		34,865	36,013
Investment in nuclear decommissioning trust funds		(40,238)	(40,961)
Changes in securitization account		(4,145)	(3,702)
Net cash flow used in investing activities		(161,344)	(207,097)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt		175,000	0
Retirement of long-term debt		(149,904)	0
Change in money pool payable - net		(42,279)	(20,224)
Changes in credit borrowings and commercial paper - net		(6,087)	52,300
Dividends paid:
Preferred stock		(357)	(357)
Other		(212)	803
Net cash flow provided by financing activities		(23,839)	32,522
Net increase (decrease) in cash and cash equivalents		(5,293)	(20,034)
Cash and cash equivalents at beginning of period		6,216	20,509
Cash and cash equivalents at end of period		923	475
Cash paid / (received) during the period for:
Interest - net of amount capitalized		18,761	17,311
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income		111,593	94,378
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		157,887	151,472
Deferred income taxes, investment tax credits, and non-current taxes accrued		86,443	163,299
Changes in working capital:
Receivables		53,786	75,196
Fuel inventory		(1,402)	3,066
Accounts payable		(18,036)	(7,846)
Taxes accrued		(24,705)	22,563
Interest accrued		6,365	5,983
Deferred fuel costs		(52,090)	(19,487)
Other working capital accounts		(55)	(20,810)
Changes in provisions for estimated losses		(481)	(4,059)
Changes in other regulatory assets		28,579	28,922
Increase (Decrease) in Regulatory Liabilities		(6,088)	(59,969)
Changes in pensions and other postretirement liabilities		(18,075)	(17,054)
Other Noncash Income (Expense)		4,319	(75,950)
Net cash flow provided by operating activities		328,040	339,704
INVESTING ACTIVITIES
Construction/capital expenditures		(469,398)	(360,693)
Allowance for equity funds used during construction		17,745	9,990
Change in money pool receivable - net		(170,163)	(8,047)
Nuclear fuel purchases		(9,997)	(139,620)
Payments for Nuclear Fuel		(9,997)	(139,620)
Proceeds from sale of nuclear fuel		36,301	28,884
Payments to storm reserve escrow account		(853)	(332)
Receipts from storm reserve escrow account		0	8,836
Proceeds from nuclear decommissioning trust fund sales		125,453	40,586
Investment in nuclear decommissioning trust funds		(137,097)	(51,393)
Proceeds from insurance		1,582	5,305
Changes in securitization account		(7,523)	(5,527)
Net cash flow used in investing activities		(613,950)	(472,011)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt		947,038	0
Retirement of long-term debt		(154,117)	(57,499)
Changes in credit borrowings and commercial paper - net		19,382	87,504
Dividends paid:
Common stock		0	(42,125)
Other		(14)	(2,130)
Net cash flow provided by financing activities		812,289	(14,250)
Net increase (decrease) in cash and cash equivalents		526,379	(146,557)
Cash and cash equivalents at beginning of period		35,907	213,850
Cash and cash equivalents at end of period		562,286	67,293
Cash paid / (received) during the period for:
Interest - net of amount capitalized		61,613	59,261
Income taxes		(2,973)	(116,937)
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income		22,843	17,158
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		38,182	35,317
Deferred income taxes, investment tax credits, and non-current taxes accrued		7,787	13,505
Changes in working capital:
Receivables		1,018	17,890
Fuel inventory		(767)	2,672
Accounts payable		(24,818)	(19,639)
Taxes accrued		(56,244)	(38,825)
Interest accrued		(5,548)	(2,953)
Deferred fuel costs		13,817	(5,236)
Other working capital accounts		(4,856)	(578)
Changes in provisions for estimated losses		4,754	(1,772)
Changes in other regulatory assets		4,586	(10,918)
Increase (Decrease) in Regulatory Liabilities		766	(3,341)
Changes in pensions and other postretirement liabilities		(4,604)	(4,613)
Other Noncash Income (Expense)		(5,757)	(7,799)
Net cash flow provided by operating activities		(8,841)	(9,132)
INVESTING ACTIVITIES
Construction/capital expenditures		(79,141)	(92,087)
Allowance for equity funds used during construction		1,978	1,843
Change in money pool receivable - net		1,633	10,595
Increases in other investments		(738)	(42)
Net cash flow used in investing activities		(76,268)	(79,691)
Proceeds from the issuance of:
Change in money pool payable - net		74,892	12,324
Dividends paid:
Preferred stock		(238)	(238)
Other		4,662	(50)
Net cash flow provided by financing activities		79,316	12,036
Net increase (decrease) in cash and cash equivalents		(5,793)	(76,787)
Cash and cash equivalents at beginning of period		6,096	76,834
Cash and cash equivalents at end of period		303	47
Cash paid / (received) during the period for:
Interest - net of amount capitalized		18,820	15,036
Income taxes		0	(15,087)
Entergy New Orleans [Member]
OPERATING ACTIVITIES
Consolidated net income		10,882	10,978
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		13,747	13,050
Deferred income taxes, investment tax credits, and non-current taxes accrued		17,909	7,102
Changes in working capital:
Receivables		3,378	(2,659)
Fuel inventory		951	1,798
Accounts payable		(7,973)	(11,920)
Taxes accrued		(13,351)	(1,992)
Interest accrued		(81)	34
Deferred fuel costs		(11,309)	6,096
Other working capital accounts		(12,082)	(13,106)
Changes in provisions for estimated losses		196	(655)
Changes in other regulatory assets		7,226	300
Increase (Decrease) in Regulatory Liabilities		1,331	(934)
Changes in pensions and other postretirement liabilities		(3,686)	(3,915)
Other Noncash Income (Expense)		(89)	1,442
Net cash flow provided by operating activities		7,049	5,619
INVESTING ACTIVITIES
Construction/capital expenditures		(41,105)	(26,079)
Allowance for equity funds used during construction		851	450
Change in money pool receivable - net		12,291	(12,100)
Payments to storm reserve escrow account		(232)	(110)
Receipts from storm reserve escrow account		3	0
Changes in securitization account		(3,381)	(2,912)
Net cash flow used in investing activities		(31,573)	(40,751)
Dividends paid:
Common stock		(6,250)	(12,200)
Preferred stock		0	(241)
Other		(607)	573
Net cash flow provided by financing activities		(6,857)	(11,868)
Net increase (decrease) in cash and cash equivalents		(31,381)	(47,000)
Cash and cash equivalents at beginning of period		32,741	103,068
Cash and cash equivalents at end of period		1,360	56,068
Cash paid / (received) during the period for:
Interest - net of amount capitalized		5,098	5,043
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income		17,350	10,854
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		30,766	28,111
Deferred income taxes, investment tax credits, and non-current taxes accrued		(21,607)	(25,678)
Changes in working capital:
Receivables		9,190	(683)
Fuel inventory		(134)	4,581
Accounts payable		(24,653)	(1,150)
Taxes accrued		3,981	16,110
Interest accrued		(5,575)	(6,816)
Deferred fuel costs		(28,626)	20,375
Other working capital accounts		4,788	1,422
Changes in provisions for estimated losses		(208)	663
Changes in other regulatory assets		20,497	23,762
Increase (Decrease) in Regulatory Liabilities		5,145	(2,498)
Changes in pensions and other postretirement liabilities		(6,851)	(5,814)
Other Noncash Income (Expense)		(3,015)	(3,659)
Net cash flow provided by operating activities		1,048	59,580
INVESTING ACTIVITIES
Construction/capital expenditures		(94,123)	(68,765)
Allowance for equity funds used during construction		1,696	1,320
Change in money pool receivable - net		32,313	681
Increases in other investments		0	(14,000)
Changes in securitization account		7,985	11,177
Net cash flow used in investing activities		(52,129)	(69,587)
Proceeds from the issuance of:
Retirement of long-term debt		(24,977)	(24,188)
Change in money pool payable - net		0	28,941
Dividends paid:
Other		(479)	(839)
Net cash flow provided by financing activities		(25,456)	3,914
Net increase (decrease) in cash and cash equivalents		(76,537)	(6,093)
Cash and cash equivalents at beginning of period		115,513	6,181
Cash and cash equivalents at end of period		38,976	88
Cash paid / (received) during the period for:
Interest - net of amount capitalized		26,939	27,986
Income taxes		(1,624)	(3,446)
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income		22,308	20,347
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization		66,323	61,562
Deferred income taxes, investment tax credits, and non-current taxes accrued		7,929	18,293
Changes in working capital:
Receivables		5,883	13,953
Accounts payable		(9,632)	(3,008)
Taxes accrued		(15,033)	(15,032)
Interest accrued		736	295
Other working capital accounts		(5,874)	(1,111)
Changes in other regulatory assets		(1,960)	(1,571)
Increase (Decrease) in Regulatory Liabilities		(18,988)	23,401
Changes in pensions and other postretirement liabilities		(3,537)	(4,187)
Other Noncash Income (Expense)		17,216	(47,166)
Net cash flow provided by operating activities		65,371	65,776
INVESTING ACTIVITIES
Construction/capital expenditures		(30,707)	(14,096)
Allowance for equity funds used during construction		2,100	1,094
Change in money pool receivable - net		21,531	(80,744)
Nuclear fuel purchases		(74,257)	(21,765)
Payments for Nuclear Fuel		(74,257)	(21,765)
Proceeds from sale of nuclear fuel		0	60,188
Proceeds from nuclear decommissioning trust fund sales		54,210	75,787
Investment in nuclear decommissioning trust funds		(58,833)	(85,532)
Net cash flow used in investing activities		(85,956)	(65,068)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt		100,000	0
Retirement of long-term debt		(50,002)	(50,001)
Changes in credit borrowings and commercial paper - net		25,339	43,851
Dividends paid:
Common stock		(63,240)	0
Other		0	(13)
Net cash flow provided by financing activities		12,097	(6,163)
Net increase (decrease) in cash and cash equivalents		(8,488)	(5,455)
Cash and cash equivalents at beginning of period		287,187	245,863
Cash and cash equivalents at end of period		278,699	240,408
Cash paid / (received) during the period for:
Interest - net of amount capitalized		$ 8,592	$ 8,593

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