Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Activities:
Consolidated Net Income	$ 384,000,000	$ 438,000,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	529,000,000	501,000,000
Deferred income taxes	104,000,000	174,000,000
Allowance for equity funds used during construction	(31,000,000)	(35,000,000)
Pension, postretirement, and other employee benefits	16,000,000	(11,000,000)
Stock based compensation expense	25,000,000	21,000,000
Other, net	2,000,000	(16,000,000)
Changes in certain current assets and liabilities --
-Receivables	372,000,000	276,000,000
-Fossil fuel stock	(218,000,000)	(42,000,000)
-Other current assets	(60,000,000)	(77,000,000)
-Accounts payable	(136,000,000)	(108,000,000)
-Accrued taxes	(167,000,000)	131,000,000
-Accrued compensation	(305,000,000)	(277,000,000)
-Other current liabilities	53,000,000	23,000,000
Net cash provided from operating activities	568,000,000	998,000,000
Investing Activities:
Property additions	(1,231,000,000)	(1,086,000,000)
Distribution of restricted cash		61,000,000
Nuclear decommissioning trust fund purchases	(336,000,000)	(928,000,000)
Nuclear decommissioning trust fund sales	334,000,000	924,000,000
Proceeds from property sales	2,000,000	14,000,000
Cost of removal, net of salvage	(32,000,000)	(15,000,000)
Change in construction payables	(156,000,000)	136,000,000
Other investing activities	(8,000,000)	10,000,000
Net cash used for investing activities	(1,427,000,000)	(884,000,000)
Financing Activities:
Increase (decrease) in notes payable, net	174,000,000	(54,000,000)
Proceeds --
Long-term debt issuances	1,400,000,000	937,000,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Common stock issuances	116,000,000	193,000,000
Redemptions --
Long-term debt	(827,000,000)	(824,000,000)
Payment of common stock dividends	(410,000,000)	(385,000,000)
Payment of dividends on preferred and preference stock of subsidiaries	(16,000,000)	(16,000,000)
Other financing activities	1,000,000	(2,000,000)
Net cash provided from (used for) financing activities	588,000,000	(151,000,000)
Net Change in Cash and Cash Equivalents	(271,000,000)	(37,000,000)
Cash and Cash Equivalents at Beginning of Period	1,315,000,000	447,000,000
Cash and Cash Equivalents at End of Period	1,044,000,000	410,000,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)	178,000,000	197,000,000
Income taxes (net of refunds)	2,000,000	(357,000,000)
Noncash transactions - accrued property additions at end of period	420,000,000	531,000,000
Alabama Power [Member]
Operating Activities:
Consolidated Net Income	136,000,000	162,000,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	189,000,000	185,000,000
Deferred income taxes	31,000,000	59,000,000
Allowance for equity funds used during construction	(5,000,000)	(5,000,000)
Pension, postretirement, and other employee benefits	(1,000,000)	(11,000,000)
Stock based compensation expense	4,000,000	3,000,000
Other, net	(10,000,000)	1,000,000
Changes in certain current assets and liabilities --
-Receivables	89,000,000	51,000,000
-Fossil fuel stock	(81,000,000)	3,000,000
-Materials and supplies	2,000,000	10,000,000
-Other current assets	(51,000,000)	(69,000,000)
-Accounts payable	(149,000,000)	(153,000,000)
-Accrued taxes	43,000,000	160,000,000
-Accrued compensation	(63,000,000)	(67,000,000)
-Other current liabilities	6,000,000	(2,000,000)
Net cash provided from operating activities	140,000,000	327,000,000
Investing Activities:
Property additions	(244,000,000)	(213,000,000)
Distribution of restricted cash from pollution control revenue bonds		11,000,000
Nuclear decommissioning trust fund purchases	(49,000,000)	(97,000,000)
Nuclear decommissioning trust fund sales	49,000,000	97,000,000
Cost of removal, net of salvage	(6,000,000)	(8,000,000)
Change in construction payables	14,000,000	(2,000,000)
Other investing activities	1,000,000	(12,000,000)
Net cash used for investing activities	(235,000,000)	(224,000,000)
Proceeds --
Capital contributions from parent company	5,000,000	5,000,000
Senior note issuances	250,000,000	250,000,000
Redemptions --
Pollution control revenue bonds	(1,000,000)
Senior notes		(200,000,000)
Payment of preferred and preference stock dividends	(10,000,000)	(10,000,000)
Payment of common stock dividends	(135,000,000)	(138,000,000)
Other financing activities	(3,000,000)	(5,000,000)
Net cash provided from (used for) financing activities	106,000,000	(98,000,000)
Net Change in Cash and Cash Equivalents	11,000,000	5,000,000
Cash and Cash Equivalents at Beginning of Period	344,000,000	154,000,000
Cash and Cash Equivalents at End of Period	355,000,000	159,000,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)	66,000,000	72,000,000
Income taxes (net of refunds)	22,000,000	(110,000,000)
Noncash transactions - accrued property additions at end of period	32,000,000	26,000,000
Georgia Power [Member]
Operating Activities:
Consolidated Net Income	171,000,000	210,000,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	229,000,000	210,000,000
Deferred income taxes	38,000,000	56,000,000
Allowance for equity funds used during construction	(13,000,000)	(25,000,000)
Other, net	33,000,000	(14,000,000)
Changes in certain current assets and liabilities --
-Receivables	258,000,000	122,000,000
-Fossil fuel stock	(122,000,000)	(30,000,000)
-Prepaid income taxes	10,000,000	80,000,000
-Other current assets	(4,000,000)	(14,000,000)
-Accounts payable	(62,000,000)	(50,000,000)
-Accrued taxes	(206,000,000)	(194,000,000)
-Accrued compensation	(80,000,000)	(65,000,000)
-Other current liabilities	60,000,000	64,000,000
Net cash provided from operating activities	312,000,000	350,000,000
Investing Activities:
Property additions	(476,000,000)	(513,000,000)
Nuclear decommissioning trust fund purchases	(287,000,000)	(830,000,000)
Nuclear decommissioning trust fund sales	285,000,000	827,000,000
Cost of removal, net of salvage	(15,000,000)	1,000,000
Change in construction payables, net of joint owner portion	(203,000,000)	93,000,000
Other investing activities	15,000,000	(6,000,000)
Net cash used for investing activities	(681,000,000)	(428,000,000)
Financing Activities:
Increase (decrease) in notes payable, net	99,000,000	(62,000,000)
Proceeds --
Capital contributions from parent company	9,000,000	171,000,000
Pollution control revenue bonds issuances		137,000,000
Senior note issuances	750,000,000	300,000,000
Other long-term debt issuances		250,000,000
Redemptions --
Pollution control revenue bonds		(84,000,000)
Senior notes		(101,000,000)
Other long-term debt	(250,000,000)	(300,000,000)
Payment of preferred and preference stock dividends	(4,000,000)	(4,000,000)
Payment of common stock dividends	(227,000,000)	(224,000,000)
Other financing activities	(8,000,000)	(2,000,000)
Net cash provided from (used for) financing activities	369,000,000	81,000,000
Net Change in Cash and Cash Equivalents		3,000,000
Cash and Cash Equivalents at Beginning of Period	13,000,000	8,000,000
Cash and Cash Equivalents at End of Period	13,000,000	11,000,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)	58,000,000	65,000,000
Income taxes (net of refunds)	28,000,000	(77,000,000)
Noncash transactions - accrued property additions at end of period	178,000,000	350,000,000
Gulf Power [Member]
Operating Activities:
Consolidated Net Income	22,217,000	13,242,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	34,844,000	33,294,000
Deferred income taxes	32,505,000	6,249,000
Allowance for equity funds used during construction	(1,237,000)	(2,135,000)
Pension, postretirement, and other employee benefits	1,315,000	(1,256,000)
Stock based compensation expense	685,000	518,000
Other, net	5,478,000	(3,793,000)
Changes in certain current assets and liabilities --
-Receivables	14,754,000	35,336,000
-Prepayments	1,559,000	1,156,000
-Fossil fuel stock	1,543,000	(14,941,000)
-Materials and supplies	(1,476,000)	(726,000)
-Prepaid income taxes	17,324,000	28,889,000
-Other current assets		7,000
-Accounts payable	(21,516,000)	(8,863,000)
-Accrued taxes	(1,453,000)	4,053,000
-Accrued compensation	(9,190,000)	(10,000,000)
-Over recovered regulatory clause revenues	14,516,000	687,000
-Other current liabilities	5,637,000	5,440,000
Net cash provided from operating activities	117,505,000	87,157,000
Investing Activities:
Property additions	(94,879,000)	(94,239,000)
Cost of removal, net of salvage	(9,342,000)	(5,314,000)
Change in construction payables	7,773,000	3,171,000
Payments pursuant to long-term service agreements	(2,274,000)	(2,198,000)
Other investing activities	(76,000)	68,000
Net cash used for investing activities	(98,798,000)	(98,512,000)
Financing Activities:
Increase (decrease) in notes payable, net	(27,338,000)	(6,620,000)
Proceeds --
Capital contributions from parent company	732,000	809,000
Common stock issuances	40,000,000	50,000,000
Redemptions --
Senior notes	(16,000)	(125,000)
Payment of preferred and preference stock dividends	(1,551,000)	(1,551,000)
Payment of common stock dividends	(28,950,000)	(27,500,000)
Other financing activities	198,000	110,000
Net cash provided from (used for) financing activities	(16,925,000)	15,123,000
Net Change in Cash and Cash Equivalents	1,782,000	3,768,000
Cash and Cash Equivalents at Beginning of Period	17,328,000	16,434,000
Cash and Cash Equivalents at End of Period	19,110,000	20,202,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)	9,352,000	8,284,000
Income taxes (net of refunds)	(35,742,000)	(29,557,000)
Noncash transactions - accrued property additions at end of period	28,788,000	17,882,000
Mississippi Power [Member]
Operating Activities:
Consolidated Net Income	25,688,000	15,050,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	21,931,000	21,442,000
Deferred income taxes	(1,210,000)	10,015,000
Convertible investment tax credits	13,974,000	9,750,000
Allowance for equity funds used during construction	(11,827,000)	(3,131,000)
Pension, postretirement, and other employee benefits	2,268,000	1,037,000
Stock based compensation expense	957,000	813,000
Hedge Settlements	(15,983,000)
Other, net	(1,127,000)	(1,363,000)
Changes in certain current assets and liabilities --
-Receivables	14,536,000	11,592,000
-Fossil fuel stock	(16,188,000)	(538,000)
-Materials and supplies	(538,000)	(317,000)
-Prepaid income taxes	4,168,000	15,976,000
-Other current assets	(4,357,000)	1,649,000
-Accounts payable	(11,558,000)	17,538,000
-Accrued taxes	(31,434,000)	(31,213,000)
-Accrued compensation	(10,803,000)	(9,556,000)
-Over recovered regulatory clause revenues	12,627,000	7,756,000
-Other current liabilities	9,480,000	(149,000)
Net cash provided from operating activities	604,000	66,351,000
Investing Activities:
Property additions	(370,923,000)	(148,917,000)
Distribution of restricted cash		50,000,000
Cost of removal, net of salvage	(1,149,000)	(2,830,000)
Change in construction payables	30,080,000	33,291,000
Capital grant proceeds	1,816,000	16,912,000
Other investing activities	(4,207,000)	(834,000)
Net cash used for investing activities	(344,383,000)	(52,378,000)
Proceeds --
Capital contributions from parent company	150,735,000	50,610,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Senior note issuances	400,000,000
Redemptions --
Capital leases	(377,000)	(349,000)
Other long-term debt	(75,000,000)	(130,000,000)
Payment of preferred and preference stock dividends	(433,000)	(433,000)
Payment of common stock dividends	(26,700,000)	(18,875,000)
Other financing activities	715,000	(312,000)
Net cash provided from (used for) financing activities	598,940,000	(99,359,000)
Net Change in Cash and Cash Equivalents	255,161,000	(85,386,000)
Cash and Cash Equivalents at Beginning of Period	211,585,000	160,779,000
Cash and Cash Equivalents at End of Period	466,746,000	75,393,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)		6,135,000
Income taxes (net of refunds)	(11,994,000)	(32,294,000)
Noncash transactions - accrued property additions at end of period	165,982,000	72,114,000
Southern Power [Member]
Operating Activities:
Consolidated Net Income	29,316,000	37,743,000
Adjustments to reconcile consolidated net income to net cash provided from operating activities --
Depreciation and amortization, total	34,887,000	33,580,000
Deferred income taxes	9,917,000	8,601,000
Convertible investment tax credits	(3,900,000)	38,068,000
Deferred revenues	(16,686,000)	(21,476,000)
Mark-to-market adjustments	6,467,000	(63,000)
Other, net	1,326,000	1,752,000
Changes in certain current assets and liabilities --
-Receivables	12,400,000	20,759,000
-Fossil fuel stock	(755,000)	625,000
-Materials and supplies	(1,167,000)	253,000
-Prepaid income taxes	(5,105,000)	15,744,000
-Other current assets	(2,083,000)	(137,000)
-Accounts payable	(14,590,000)	(21,645,000)
-Accrued taxes	4,375,000	4,888,000
Accrued interest	(10,172,000)	(12,281,000)
-Other current liabilities	(2,000)	(519,000)
Net cash provided from operating activities	44,228,000	105,892,000
Investing Activities:
Property additions	(32,450,000)	(113,518,000)
Change in construction payables	(999,000)	43,259,000
Payments pursuant to long-term service agreements	(11,415,000)	(11,320,000)
Other investing activities	(2,848,000)	(3,165,000)
Net cash used for investing activities	(47,712,000)	(84,744,000)
Financing Activities:
Increase (decrease) in notes payable, net	20,165,000	(20,360,000)
Proceeds --
Capital contributions from parent company	1,219,000	17,179,000
Redemptions --
Other long-term debt	(150,000)	(3,066,000)
Payment of common stock dividends	(31,750,000)	(22,800,000)
Other financing activities	25,000	38,000
Net cash provided from (used for) financing activities	(10,491,000)	(29,009,000)
Net Change in Cash and Cash Equivalents	(13,975,000)	(7,861,000)
Cash and Cash Equivalents at Beginning of Period	16,943,000	14,204,000
Cash and Cash Equivalents at End of Period	2,968,000	6,343,000
Supplemental Cash Flow Information:
Interest (net capitalized for 2012 and 2011, respectively)	20,966,000	26,993,000
Income taxes (net of refunds)	10,820,000	(44,721,000)
Noncash transactions - accrued property additions at end of period	$ 31,591,000	$ 78,567,000