Statements of Cash Flows (SYSTEM ENERGY RESOURCES, INC.) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
OPERATING ACTIVITIES
Net income	$ 1,367,372	[1]	$ 1,270,305	[1]	$ 1,251,050	[1]
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	1,745,455		1,705,331		1,458,861
Deferred income taxes, investment tax credits, and non-current taxes accrued	(280,029)		718,987		864,684
Changes in working capital:
Receivables	28,091		(99,640)		116,444
Accounts payable	(131,970)		216,635		(14,251)
Prepaid taxes and taxes accrued	580,042		(116,988)		(260,029)
Interest accrued	(34,172)		17,651		4,974
Other working capital accounts	41,875		(160,326)		(43,391)
Provisions for estimated losses	(11,086)		265,284		(12,030)
Changes in other regulatory assets	(673,244)		339,408		(415,157)
Changes in pension and other postretirement liabilities	962,461		(80,844)		71,789
Other	(415,685)		(103,793)		(181,391)
Net cash flow provided by operating activities	3,128,817		3,926,081		2,933,158
INVESTING ACTIVITIES
Construction/capital expenditures	(2,040,027)		(1,974,286)		(1,931,245)
Allowance for equity funds used during construction	86,252		59,381		59,545
Nuclear fuel purchases	(641,493)		(407,711)		(525,474)
Proceeds from sale of nuclear fuel					284,997
Decrease (increase) in other investments	(11,623)		24,956		100,956
Proceeds from nuclear decommissioning trust fund sales	1,360,346		2,606,383		2,570,523
Investment in nuclear decommissioning trust funds	(1,475,017)		(2,730,377)		(2,667,172)
Change in money pool receivable - net	(7,260)		(29,945)		(1,036)
Net cash flow used in investing activities	(3,446,853)		(2,574,223)		(2,094,394)
FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	2,990,881		3,870,694		2,003,469
Retirement of long-term debt	(2,437,372)		(4,178,127)		(1,843,169)
Changes in credit borrowings - net	(6,501)		(8,512)		(25,000)
Dividends paid:
Common stock	(589,605)		(603,854)		(576,956)
Net cash flow used in financing activities	(282,285)		(1,767,275)		(1,048,388)
Net increase (decrease) in cash and cash equivalents	(600,034)		(415,079)		(210,940)
Cash and cash equivalents at beginning of period	1,294,472		1,709,551		1,920,491
Cash and cash equivalents at end of period	694,438		1,294,472		1,709,551
Cash paid during the period for:
Interest - net of amount capitalized	532,271		534,004		576,811
Income taxes	(2,042)		32,144		43,057
System Energy
OPERATING ACTIVITIES
Net income	64,197		82,624		48,908
Adjustments to reconcile net income to net cash flow provided by operating activities:
Depreciation, amortization, and decommissioning, including nuclear fuel amortization	229,715		219,552		169,507
Deferred income taxes, investment tax credits, and non-current taxes accrued	14,923		(1,536)		211,297
Changes in working capital:
Receivables	(5,512)		(728)		(2,296)
Accounts payable	17,275		(14,351)		11,574
Prepaid taxes and taxes accrued	160,494		1,327		5,413
Interest accrued	(38,305)		3,503		2,667
Other working capital accounts	11,260		(15,287)		11,672
Provisions for estimated losses			(2,009)		(16)
Changes in other regulatory assets	10,874		(4,948)		(4,824)
Changes in pension and other postretirement liabilities	34,474		29,797		3,440
Other	(68,714)		(47,539)		(39,465)
Net cash flow provided by operating activities	430,681		250,405		417,877
INVESTING ACTIVITIES
Construction/capital expenditures	(234,753)		(156,766)		(90,778)
Proceeds from the transfer of development costs			100,280
Allowance for equity funds used during construction	22,359		9,892		12,484
Nuclear fuel purchases	(59,755)		(129,504)
Proceeds from sale of nuclear fuel	12,420				180
Decrease (increase) in other investments			25,560
Proceeds from nuclear decommissioning trust fund sales	203,444		322,789		392,959
Investment in nuclear decommissioning trust funds	(232,636)		(349,398)		(416,597)
Change in money pool receivable - net	(22,476)		(7,441)		(47,592)
Net cash flow used in investing activities	(311,397)		(184,588)		(149,344)
FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt			55,385
Retirement of long-term debt	(78,161)		(41,715)		(28,440)
Changes in credit borrowings - net	(38,264)		20,003
Dividends paid:
Common stock	(76,000)		(100,200)		(75,300)
Other	(5,474)				(3,099)
Net cash flow used in financing activities	(197,899)		(66,527)		(106,839)
Net increase (decrease) in cash and cash equivalents	(78,615)		(710)		161,694
Cash and cash equivalents at beginning of period	263,772		264,482		102,788
Cash and cash equivalents at end of period	185,157		263,772		264,482
Cash paid during the period for:
Interest - net of amount capitalized	40,719		35,540		48,005
Income taxes	$ (100,889)		$ 55,963		$ (120,352)

[1] Consolidated net income and preferred dividend requirements of subsidiaries for 2011, 2010 and 2009 include $13.3 million of preferred dividends on subsidiaries' preferred stock without sinking fund that is not presented as equity.