Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES
Consolidated net income	$ 166,982	$ (146,740)
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	472,933	450,009
Deferred income taxes, investment tax credits, and non-current taxes accrued	98,671	38,858
Asset impairment	0	355,524
Changes in working capital:
Receivables	(29,845)	156,202
Fuel inventory	(5,147)	(20,213)
Accounts payable	(40,861)	(145,599)
Prepaid taxes and taxes accrued	(35,648)	(89,583)
Interest accrued	(30,570)	(32,194)
Deferred fuel	(2,149)	77,405
Other working capital accounts	(151,958)	(34,753)
Changes in provisions for estimated losses	(245,972)	(15,030)
Changes in other regulatory assets	167,634	60,857
Changes in pension and other postretirement liabilities	32,696	(4,764)
Other	147,223	(49,479)
Net cash flow provided by operating activities	543,989	600,500
INVESTING ACTIVITIES
Construction/capital expenditures	(631,857)	(563,539)
Allowance for equity funds used during construction	13,672	25,448
Nuclear fuel purchases	(145,168)	(201,059)
Payment for purchase of plant	0	0
Proceeds from sale of assets and businesses	0	0
Change in money pool receivable - net	1,601	940
NYPA value sharing payment	(71,736)	(72,000)
Payment to storm reserve escrow account	(2,219)	(1,483)
Receipts from storm reserve escrow account	252,482	861
Decrease (increase) in other investments	(44,298)	93,786
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	0
Proceeds from nuclear decommissioning trust fund sales	398,010	535,551
Investment in nuclear decommissioning trust funds	(432,247)	(567,780)
Net cash flow used in investing activities	(661,760)	(749,275)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	564,717	1,034,945
Preferred stock	0	51,000
Common stock and treasury stock	8,102	32,826
Retirement of long-term debt	(849,860)	(859,648)
Repurchase of common stock	0	0
Changes in credit borrowings - net	277,886	32,782
Dividends paid:
Common stock	(147,902)	(146,674)
Preferred stock	(5,582)	(5,582)
Net cash flow used in financing activities	(152,639)	139,649
Effect of exchange rates on cash and cash equivalents	772	(310)
Net increase (decrease) in cash and cash equivalents	(269,638)	(9,436)
Cash and cash equivalents at beginning of period	532,569	694,438
Cash and cash equivalents at end of period	262,931	685,002
Cash paid / (received) during the period for:
Interest - net of amount capitalized	138,217	134,655
Income taxes	12,341	35,992
Entergy Arkansas [Member]
OPERATING ACTIVITIES
Consolidated net income	14,719	13,874
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	92,988	88,981
Deferred income taxes, investment tax credits, and non-current taxes accrued	24,215	34,625
Changes in working capital:
Receivables	2,124	17,958
Fuel inventory	5,103	(2,455)
Accounts payable	(9,139)	(211,524)
Prepaid taxes and taxes accrued	(6,164)	(9,127)
Interest accrued	(10,117)	(10,974)
Deferred fuel	43,740	53,521
Other working capital accounts	(2,572)	14,682
Changes in provisions for estimated losses	95	(112)
Changes in other regulatory assets	16,763	21,956
Changes in pension and other postretirement liabilities	(1,327)	(9,770)
Other	2,963	9,411
Net cash flow provided by operating activities	173,391	11,046
INVESTING ACTIVITIES
Construction/capital expenditures	(126,629)	(81,518)
Allowance for equity funds used during construction	3,147	2,865
Nuclear fuel purchases	(32,561)	(34,595)
Proceeds from sale of nuclear fuel	36,478	49,879
Remittances to transition charge account	(3,459)	(3,968)
Payments from transition charge account	0	0
Proceeds from nuclear decommissioning trust fund sales	56,118	54,727
Investment in nuclear decommissioning trust funds	(59,540)	(57,898)
Change in money pool receivable - net	(33,443)	17,362
Investment in affiliates	0	0
Net cash flow used in investing activities	(159,889)	(53,146)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	98,660	0
Retirement of long-term debt	(99,703)	0
Change in money pool payable - net	0	49,043
Changes in credit borrowings - net	(15,352)	(21,376)
Dividends paid:
Common stock	(15,000)	0
Preferred stock	(1,718)	(1,718)
Other	0	(765)
Net cash flow used in financing activities	(33,113)	25,184
Net increase (decrease) in cash and cash equivalents	(19,611)	(16,916)
Cash and cash equivalents at beginning of period	34,533	22,599
Cash and cash equivalents at end of period	14,922	5,683
Cash paid / (received) during the period for:
Interest - net of amount capitalized	31,358	30,476
Income taxes	4,107	(10,584)
Entergy Gulf States Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	27,165	28,358
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	51,283	53,528
Deferred income taxes, investment tax credits, and non-current taxes accrued	27,177	(56,657)
Changes in working capital:
Receivables	(38,252)	97,172
Fuel inventory	(5,231)	(7,611)
Accounts payable	36,618	(35,277)
Prepaid taxes and taxes accrued	383	85,148
Interest accrued	5,631	5,137
Deferred fuel	(16,866)	8,144
Other working capital accounts	(42,526)	4,806
Changes in provisions for estimated losses	(64,253)	(2,870)
Changes in other regulatory assets	27,154	5,634
Changes in pension and other postretirement liabilities	4,004	513
Other	74,352	5,533
Net cash flow provided by operating activities	86,639	191,558
INVESTING ACTIVITIES
Construction/capital expenditures	(70,474)	(57,921)
Allowance for equity funds used during construction	1,650	2,262
Nuclear fuel purchases	(130,406)	(18,614)
Proceeds from sale of nuclear fuel	19,401	26,820
Change in money pool receivable - net	0	(49,584)
Payment to storm reserve escrow account	(15)	(17)
Receipts from storm reserve escrow account	65,475	52
Decrease (increase) in other investments	0	0
Proceeds from nuclear decommissioning trust fund sales	23,305	38,087
Investment in nuclear decommissioning trust funds	(28,712)	(43,222)
Proceeds from sale of investment	0	51,000
Other	0	0
Net cash flow used in investing activities	(119,776)	(51,137)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	69,804	(713)
Retirement of long-term debt	0	0
Change in money pool payable - net	1,662	0
Changes in credit borrowings - net	50,000	(12,700)
Dividends paid:
Common stock	(119,900)	(22,600)
Preferred stock	(206)	(206)
Other	0	0
Net cash flow used in financing activities	1,360	(36,219)
Net increase (decrease) in cash and cash equivalents	(31,777)	104,202
Cash and cash equivalents at beginning of period	35,686	24,845
Cash and cash equivalents at end of period	3,909	129,047
Cash paid / (received) during the period for:
Interest - net of amount capitalized	13,845	15,152
Income taxes	0	0
Entergy Louisiana [Member]
OPERATING ACTIVITIES
Consolidated net income	45,376	33,295
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	79,633	76,616
Deferred income taxes, investment tax credits, and non-current taxes accrued	41,558	22,771
Changes in working capital:
Receivables	(57,924)	27,098
Fuel inventory	454	57
Accounts payable	(69,131)	(57,561)
Prepaid taxes and taxes accrued	3,550	(4,447)
Interest accrued	(2,113)	(4,574)
Deferred fuel	30,741	(21,520)
Other working capital accounts	(8,040)	19,986
Changes in provisions for estimated losses	(186,070)	(10,981)
Changes in other regulatory assets	82,089	7,800
Other regulatory liabilities	0	0
Changes in pension and other postretirement liabilities	5,231	(3,965)
Other	104,580	(5,218)
Net cash flow provided by operating activities	69,934	79,357
INVESTING ACTIVITIES
Construction/capital expenditures	(223,758)	(93,844)
Allowance for equity funds used during construction	5,742	8,449
Nuclear fuel purchases	(16,368)	(22,327)
Payment for purchase of plant	0	0
Proceeds from sale of nuclear fuel	23,438	32,168
Change in money pool receivable - net	(22,909)	(13,383)
Remittances to transition charge account	(5,270)	(6,716)
Payments from transition charge account	0	0
Receipts from storm reserve escrow account	186,985	770
Proceeds from nuclear decommissioning trust fund sales	3,639	6,795
Investment in nuclear decommissioning trust funds	(6,981)	(9,861)
Other	0	0
Net cash flow used in investing activities	(55,482)	(97,949)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	247,725
Retirement of long-term debt	(12,237)	(19,603)
Change in money pool payable - net	0	(118,415)
Changes in credit borrowings - net	0	(65,021)
Dividends paid:
Common stock	(20,000)	(600)
Preferred stock	(1,738)	(1,738)
Other	(550)	0
Net cash flow used in financing activities	(34,525)	42,348
Net increase (decrease) in cash and cash equivalents	(20,073)	23,756
Cash and cash equivalents at beginning of period	30,086	878
Cash and cash equivalents at end of period	10,013	24,634
Cash paid / (received) during the period for:
Interest - net of amount capitalized	37,215	36,039
Income taxes	0	(3,601)
Entergy Mississippi [Member]
OPERATING ACTIVITIES
Consolidated net income	13,934	8,682
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	26,651	23,787
Deferred income taxes, investment tax credits, and non-current taxes accrued	4,806	(8,348)
Changes in working capital:
Receivables	(3,831)	56,711
Fuel inventory	(255)	(1,861)
Accounts payable	(5,222)	(16,700)
Prepaid taxes and taxes accrued	(41,260)	(14,046)
Interest accrued	1,892	(4,633)
Deferred fuel	12,216	26,247
Other working capital accounts	(8,852)	4,981
Changes in provisions for estimated losses	(1)	196
Changes in other regulatory assets	(1,169)	(6,491)
Changes in pension and other postretirement liabilities	(174)	(2,793)
Other	5,924	(4,393)
Net cash flow provided by operating activities	4,659	61,339
INVESTING ACTIVITIES
Construction/capital expenditures	(39,730)	(36,664)
Allowance for equity funds used during construction	733	1,165
Proceeds from sale of assets and businesses	0	0
Change in money pool receivable - net	16,878	(7,978)
Investment in affiliates	0	0
Other	(4)	(12)
Net cash flow used in investing activities	(22,123)	(43,489)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	0
Retirement of long-term debt	(100,000)	0
Change in money pool payable - net	4,101	(1,999)
Changes in credit borrowings - net	70,000	0
Dividends paid:
Common stock	(7,400)	0
Preferred stock	(707)	(707)
Other	(38)	(64)
Net cash flow used in financing activities	(34,044)	(2,770)
Net increase (decrease) in cash and cash equivalents	(51,508)	15,080
Cash and cash equivalents at beginning of period	52,970	16
Cash and cash equivalents at end of period	1,462	15,096
Cash paid / (received) during the period for:
Interest - net of amount capitalized	12,700	18,522
Income taxes	901	(8,407)
Entergy New Orleans
OPERATING ACTIVITIES
Consolidated net income	1,307	40
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	9,443	9,069
Deferred income taxes, investment tax credits, and non-current taxes accrued	(11,851)	(3,531)
Changes in working capital:
Receivables	281	2,182
Fuel inventory	368	1,423
Accounts payable	(7,777)	(11,069)
Prepaid taxes and taxes accrued	(399)	1,116
Interest accrued	(1,126)	(1,128)
Deferred fuel	4,936	1,800
Other working capital accounts	(8,668)	(11,241)
Changes in provisions for estimated losses	2,261	746
Changes in other regulatory assets	3,421	5,519
Changes in pension and other postretirement liabilities	(42)	(1,896)
Other	10,190	244
Net cash flow provided by operating activities	2,344	(6,726)
INVESTING ACTIVITIES
Construction/capital expenditures	(18,533)	(14,938)
Allowance for equity funds used during construction	170	149
Change in money pool receivable - net	(11,404)	9,074
Payment to storm reserve escrow account	(2,178)	(1,413)
Decrease (increase) in other investments	0	0
Investment in affiliates	0	0
Net cash flow used in investing activities	(31,945)	(7,128)
Proceeds from the issuance of:
Change in money pool payable - net	0	7,353
Changes in credit borrowings - net	25,000	0
Dividends paid:
Common stock	0	(1,700)
Preferred stock	(241)	(241)
Other	22	(40)
Net cash flow used in financing activities	24,781	5,372
Net increase (decrease) in cash and cash equivalents	(4,820)	(8,482)
Cash and cash equivalents at beginning of period	9,391	9,834
Cash and cash equivalents at end of period	4,571	1,352
Cash paid / (received) during the period for:
Interest - net of amount capitalized	4,066	3,719
Entergy Texas [Member]
OPERATING ACTIVITIES
Consolidated net income	922	1,745
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	23,360	20,727
Deferred income taxes, investment tax credits, and non-current taxes accrued	(31,998)	3,184
Changes in working capital:
Receivables	21,476	82,506
Fuel inventory	(3,453)	(7,173)
Accounts payable	12,838	(10,370)
Prepaid taxes and taxes accrued	17,881	(17,324)
Interest accrued	(8,763)	(8,608)
Deferred fuel	(76,915)	9,213
Other working capital accounts	(3,839)	(3,131)
Changes in provisions for estimated losses	1,689	(192)
Changes in other regulatory assets	24,771	18,716
Changes in pension and other postretirement liabilities	(2,114)	(3,097)
Other	(916)	(7,220)
Net cash flow provided by operating activities	(25,061)	78,976
INVESTING ACTIVITIES
Construction/capital expenditures	(43,382)	(42,162)
Allowance for equity funds used during construction	759	1,089
Change in money pool receivable - net	19,175	7,184
Remittances to transition charge account	(20,274)	(19,070)
Payments from transition charge account	30,604	30,694
Net cash flow used in investing activities	(13,118)	(22,265)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	0
Retirement of long-term debt	(21,967)	(21,670)
Change in money pool payable - net	180	0
Dividends paid:
Common stock	0	0
Other	(160)	(688)
Net cash flow used in financing activities	(21,947)	(22,358)
Net increase (decrease) in cash and cash equivalents	(60,126)	34,353
Cash and cash equivalents at beginning of period	60,236	65,289
Cash and cash equivalents at end of period	110	99,642
Cash paid / (received) during the period for:
Interest - net of amount capitalized	30,909	31,320
Income taxes	(1,941)	0
System Energy [Member]
OPERATING ACTIVITIES
Consolidated net income	28,006	26,536
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	61,067	45,391
Deferred income taxes, investment tax credits, and non-current taxes accrued	16,477	45,966
Changes in working capital:
Receivables	10,146	11,964
Accounts payable	(11,351)	8,260
Prepaid taxes and taxes accrued	(17,238)	(46,362)
Interest accrued	161	(2,300)
Other working capital accounts	33	(23,236)
Changes in other regulatory assets	5,784	2,716
Changes in pension and other postretirement liabilities	266	(2,859)
Other	827	1,460
Net cash flow provided by operating activities	94,178	67,536
INVESTING ACTIVITIES
Construction/capital expenditures	(21,349)	(140,334)
Allowance for equity funds used during construction	1,471	9,469
Nuclear fuel purchases	(22,932)	(152,928)
Proceeds from sale of nuclear fuel	26,522	0
Decrease (increase) in other investments	0	0
Proceeds from nuclear decommissioning trust fund sales	25,612	125,431
Investment in nuclear decommissioning trust funds	(33,876)	(133,552)
Change in money pool receivable - net	(24,687)	73,295
Net cash flow used in investing activities	(49,239)	(218,619)
Proceeds from the issuance of:
Proceeds from the issuance of long-term debt	0	50,000
Retirement of long-term debt	(40,902)	(39,892)
Changes in credit borrowings - net	(19,797)	69,179
Dividends paid:
Common stock	(50,000)	(28,750)
Other	(757)	(1,431)
Net cash flow used in financing activities	(111,456)	49,106
Net increase (decrease) in cash and cash equivalents	(66,517)	(101,977)
Cash and cash equivalents at beginning of period	83,622	185,157
Cash and cash equivalents at end of period	17,105	83,180
Cash paid / (received) during the period for:
Interest - net of amount capitalized	5,938	9,805
Income taxes	$ 4,334	$ (1,020)