Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 1,256,000,000	$ 1,315,000,000
Restricted cash and cash equivalents	7,000,000	8,000,000
Receivables --
Customer accounts receivable	1,369,000,000	1,074,000,000
Unbilled revenues	428,000,000	376,000,000
Under recovered regulatory clause revenues	7,000,000	143,000,000
Other accounts and notes receivable	233,000,000	282,000,000
Accumulated provision for uncollectible accounts	(23,000,000)	(26,000,000)
Fossil fuel stock, at average cost	1,599,000,000	1,367,000,000
Materials and supplies, at average cost	931,000,000	903,000,000
Vacation pay	161,000,000	160,000,000
Prepaid expenses	519,000,000	385,000,000
Other regulatory assets, current	149,000,000	239,000,000
Other current assets	60,000,000	46,000,000
Total current assets	6,696,000,000	6,272,000,000
Property, Plant, and Equipment:
In service	61,980,000,000	59,744,000,000
Less accumulated provision for depreciation	21,906,000,000	21,154,000,000
Plant in service, net of depreciation	40,074,000,000	38,590,000,000
Other utility plant, net	51,000,000	55,000,000
Nuclear fuel, at amortized cost	786,000,000	774,000,000
Construction work in progress	6,363,000,000	5,591,000,000
Total property, plant, and equipment	47,274,000,000	45,010,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,281,000,000	1,207,000,000
Leveraged leases	665,000,000	649,000,000
Miscellaneous property and investments	213,000,000	262,000,000
Total other property and investments	2,159,000,000	2,118,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,389,000,000	1,365,000,000
Unamortized debt issuance expense	139,000,000	156,000,000
Unamortized loss on reacquired debt	302,000,000	285,000,000
Deferred under recovered regulatory clause revenues	27,000,000	48,000,000
Other regulatory assets, deferred	3,409,000,000	3,532,000,000
Other deferred charges and assets	568,000,000	481,000,000
Total deferred charges and other assets	5,834,000,000	5,867,000,000
Total Assets	61,963,000,000	59,267,000,000
Current Liabilities:
Securities due within one year	2,433,000,000	1,717,000,000
Interest-bearing refundable deposit related to asset sale	150,000,000	0
Notes payable	335,000,000	859,000,000
Accounts payable	1,280,000,000	1,553,000,000
Customer deposits	366,000,000	347,000,000
Accrued taxes --
Accrued income taxes	65,000,000	36,000,000
Other accrued taxes	490,000,000	425,000,000
Accrued interest	250,000,000	226,000,000
Accrued vacation pay	205,000,000	205,000,000
Accrued compensation	325,000,000	450,000,000
Liabilities from risk management activities	105,000,000	209,000,000
Other regulatory liabilities, current	139,000,000	125,000,000
Other current liabilities	426,000,000	425,000,000
Total current liabilities	6,569,000,000	6,577,000,000
Long-term Debt	18,955,000,000	18,647,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	9,672,000,000	8,809,000,000
Deferred credits related to income taxes	213,000,000	224,000,000
Accumulated deferred investment tax credits	807,000,000	611,000,000
Employee benefit obligations	2,449,000,000	2,442,000,000
Asset retirement obligations	1,409,000,000	1,321,000,000
Other cost of removal obligations	1,214,000,000	1,165,000,000
Other regulatory liabilities, deferred	313,000,000	297,000,000
Other deferred credits and liabilities	641,000,000	514,000,000
Total deferred credits and other liabilities	16,718,000,000	15,383,000,000
Total Liabilities	42,242,000,000	40,607,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,386,000,000	4,328,000,000
Paid-in capital	4,831,000,000	4,410,000,000
Treasury, at cost	(136,000,000)	(17,000,000)
Retained earnings	9,670,000,000	8,968,000,000
Accumulated other comprehensive loss	(112,000,000)	(111,000,000)
Total common stockholders' equity	18,639,000,000	17,578,000,000
Preferred and Preference Stock of Subsidiaries	707,000,000	707,000,000
Total Stockholders' Equity	19,346,000,000	18,285,000,000
Total Liabilities and Stockholders' Equity	61,963,000,000	59,267,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	366,000,000	344,000,000
Restricted cash and cash equivalents	0	1,000,000
Receivables --
Customer accounts receivable	446,000,000	332,000,000
Unbilled revenues	121,000,000	126,000,000
Other accounts and notes receivable	59,000,000	35,000,000
Affiliated companies	43,000,000	79,000,000
Accumulated provision for uncollectible accounts	(9,000,000)	(10,000,000)
Fossil fuel stock, at average cost	437,000,000	344,000,000
Materials and supplies, at average cost	379,000,000	375,000,000
Vacation pay	59,000,000	59,000,000
Prepaid expenses	106,000,000	74,000,000
Other regulatory assets, current	21,000,000	44,000,000
Other current assets	11,000,000	11,000,000
Total current assets	2,039,000,000	1,814,000,000
Property, Plant, and Equipment:
In service	21,253,000,000	20,809,000,000
Less accumulated provision for depreciation	7,659,000,000	7,344,000,000
Plant in service, net of depreciation	13,594,000,000	13,465,000,000
Nuclear fuel, at amortized cost	328,000,000	330,000,000
Construction work in progress	381,000,000	374,000,000
Total property, plant, and equipment	14,303,000,000	14,169,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	53,000,000	62,000,000
Nuclear decommissioning trusts, at fair value	597,000,000	540,000,000
Miscellaneous property and investments	74,000,000	73,000,000
Total other property and investments	724,000,000	675,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	528,000,000	532,000,000
Prepaid pension costs	82,000,000	59,000,000
Deferred under recovered regulatory clause revenues	27,000,000	48,000,000
Other regulatory assets, deferred	965,000,000	994,000,000
Other deferred charges and assets	158,000,000	186,000,000
Total deferred charges and other assets	1,760,000,000	1,819,000,000
Total Assets	18,826,000,000	18,477,000,000
Current Liabilities:
Securities due within one year	700,000,000	500,000,000
Affiliated	183,000,000	203,000,000
Accounts payable	178,000,000	322,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	93,000,000	32,000,000
Other accrued taxes	104,000,000	34,000,000
Accrued interest	66,000,000	63,000,000
Accrued vacation pay	48,000,000	48,000,000
Accrued compensation	71,000,000	95,000,000
Liabilities from risk management activities	46,000,000	54,000,000
Other regulatory liabilities, current	5,000,000	18,000,000
Other current liabilities	37,000,000	38,000,000
Total current liabilities	1,617,000,000	1,492,000,000
Long-term Debt	5,430,000,000	5,632,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,366,000,000	3,257,000,000
Deferred credits related to income taxes	80,000,000	83,000,000
Accumulated deferred investment tax credits	143,000,000	149,000,000
Employee benefit obligations	356,000,000	343,000,000
Asset retirement obligations	580,000,000	553,000,000
Other cost of removal obligations	751,000,000	703,000,000
Other regulatory liabilities, deferred	185,000,000	156,000,000
Other deferred credits and liabilities	75,000,000	82,000,000
Total deferred credits and other liabilities	5,536,000,000	5,326,000,000
Total Liabilities	12,583,000,000	12,450,000,000
Redeemable Preferred Stock	342,000,000	342,000,000
Preference Stock	343,000,000	343,000,000
Common Stockholders' Equity:
Common stock	1,222,000,000	1,222,000,000
Paid-in capital	2,220,000,000	2,182,000,000
Retained earnings	2,143,000,000	1,956,000,000
Accumulated other comprehensive loss	(27,000,000)	(18,000,000)
Total common stockholders' equity	5,558,000,000	5,342,000,000
Total Liabilities and Stockholders' Equity	18,826,000,000	18,477,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	425,000,000	13,000,000
Receivables --
Customer accounts receivable	713,000,000	571,000,000
Unbilled revenues	224,000,000	172,000,000
Under recovered regulatory clause revenues	0	137,000,000
Joint owner accounts receivable	48,000,000	87,000,000
Other accounts and notes receivable	54,000,000	61,000,000
Affiliated companies	28,000,000	26,000,000
Accumulated provision for uncollectible accounts	(11,000,000)	(13,000,000)
Fossil fuel stock, at average cost	849,000,000	723,000,000
Materials and supplies, at average cost	403,000,000	406,000,000
Vacation pay	84,000,000	82,000,000
Prepaid income taxes	122,000,000	71,000,000
Other regulatory assets, current	68,000,000	108,000,000
Other current assets	111,000,000	106,000,000
Total current assets	3,118,000,000	2,550,000,000
Property, Plant, and Equipment:
In service	28,667,000,000	27,804,000,000
Less accumulated provision for depreciation	10,537,000,000	10,296,000,000
Plant in service, net of depreciation	18,130,000,000	17,508,000,000
Other utility plant, net	51,000,000	55,000,000
Nuclear fuel, at amortized cost	458,000,000	443,000,000
Construction work in progress	3,342,000,000	3,274,000,000
Total property, plant, and equipment	21,981,000,000	21,280,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	45,000,000	63,000,000
Nuclear decommissioning trusts, at fair value	684,000,000	667,000,000
Miscellaneous property and investments	44,000,000	44,000,000
Total other property and investments	773,000,000	774,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	760,000,000	756,000,000
Other regulatory assets, deferred	1,534,000,000	1,604,000,000
Other deferred charges and assets	255,000,000	187,000,000
Total deferred charges and other assets	2,549,000,000	2,547,000,000
Total Assets	28,421,000,000	27,151,000,000
Current Liabilities:
Securities due within one year	1,455,000,000	455,000,000
Notes payable	2,000,000	515,000,000
Affiliated	378,000,000	337,000,000
Accounts payable	441,000,000	686,000,000
Customer deposits	230,000,000	213,000,000
Accrued taxes --
Accrued income taxes	134,000,000	50,000,000
Other accrued taxes	269,000,000	304,000,000
Accrued interest	117,000,000	92,000,000
Accrued vacation pay	60,000,000	60,000,000
Accrued compensation	87,000,000	125,000,000
Liabilities from risk management activities	31,000,000	68,000,000
Other regulatory liabilities, current	75,000,000	65,000,000
Over recovered regulatory clause liabilities	81,000,000	0
Other current liabilities	131,000,000	171,000,000
Total current liabilities	3,491,000,000	3,141,000,000
Long-term Debt	8,121,000,000	8,018,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	4,737,000,000	4,388,000,000
Deferred credits related to income taxes	116,000,000	122,000,000
Accumulated deferred investment tax credits	211,000,000	220,000,000
Employee benefit obligations	922,000,000	905,000,000
Asset retirement obligations	773,000,000	734,000,000
Other cost of removal obligations	94,000,000	110,000,000
Other deferred credits and liabilities	311,000,000	224,000,000
Total deferred credits and other liabilities	7,164,000,000	6,703,000,000
Total Liabilities	18,776,000,000	17,862,000,000
Redeemable Preferred Stock	45,000,000	45,000,000
Preference Stock	221,000,000	221,000,000
Common Stockholders' Equity:
Common stock	398,000,000	398,000,000
Paid-in capital	5,570,000,000	5,522,000,000
Retained earnings	3,418,000,000	3,112,000,000
Accumulated other comprehensive loss	(7,000,000)	(9,000,000)
Total common stockholders' equity	9,379,000,000	9,023,000,000
Total Liabilities and Stockholders' Equity	28,421,000,000	27,151,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	22,909,000	17,328,000
Receivables --
Customer accounts receivable	87,198,000	72,754,000
Unbilled revenues	52,812,000	49,921,000
Under recovered regulatory clause revenues	6,757,000	5,530,000
Other accounts and notes receivable	10,626,000	13,350,000
Affiliated companies	8,359,000	14,844,000
Accumulated provision for uncollectible accounts	(1,745,000)	(1,962,000)
Fossil fuel stock, at average cost	133,512,000	147,567,000
Materials and supplies, at average cost	54,189,000	49,781,000
Prepaid expenses	43,845,000	28,327,000
Other regulatory assets, current	27,247,000	35,849,000
Other current assets	5,185,000	2,051,000
Total current assets	450,894,000	435,340,000
Property, Plant, and Equipment:
In service	4,126,794,000	3,846,446,000
Less accumulated provision for depreciation	1,149,685,000	1,124,291,000
Plant in service, net of depreciation	2,977,109,000	2,722,155,000
Construction work in progress	201,929,000	287,173,000
Total property, plant, and equipment	3,179,038,000	3,009,328,000
Other Property and Investments:
Total other property and investments	15,765,000	16,394,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	51,939,000	48,210,000
Other regulatory assets, deferred	333,299,000	323,116,000
Other deferred charges and assets	36,611,000	39,493,000
Total deferred charges and other assets	421,849,000	410,819,000
Total Assets	4,067,546,000	3,871,881,000
Current Liabilities:
Securities due within one year	60,000,000	0
Notes payable	19,228,000	114,507,000
Affiliated	72,051,000	54,874,000
Accounts payable	51,500,000	63,265,000
Customer deposits	35,805,000	35,779,000
Accrued taxes --
Accrued income taxes	5,438,000	1,362,000
Other accrued taxes	25,888,000	12,114,000
Accrued interest	17,622,000	14,018,000
Accrued compensation	10,222,000	14,485,000
Liabilities from risk management activities	12,851,000	22,786,000
Other regulatory liabilities, current	51,585,000	35,639,000
Other current liabilities	20,353,000	22,916,000
Total current liabilities	382,543,000	391,745,000
Long-term Debt	1,185,719,000	1,235,447,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	616,122,000	458,978,000
Accumulated deferred investment tax credits	5,746,000	6,760,000
Employee benefit obligations	109,721,000	109,740,000
Other cost of removal obligations	215,138,000	214,598,000
Other regulatory liabilities, deferred	53,796,000	44,843,000
Other deferred credits and liabilities	214,687,000	186,824,000
Total deferred credits and other liabilities	1,215,210,000	1,021,743,000
Total Liabilities	2,783,472,000	2,648,935,000
Preference Stock	97,998,000	97,998,000
Common Stockholders' Equity:
Common stock	393,060,000	353,060,000
Paid-in capital	546,875,000	542,709,000
Retained earnings	247,866,000	231,333,000
Accumulated other comprehensive loss	(1,725,000)	(2,154,000)
Total common stockholders' equity	1,186,076,000	1,124,948,000
Total Liabilities and Stockholders' Equity	4,067,546,000	3,871,881,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	216,696,000	211,585,000
Receivables --
Customer accounts receivable	42,929,000	32,551,000
Unbilled revenues	31,234,000	27,239,000
Other accounts and notes receivable	4,041,000	7,080,000
Affiliated companies	30,786,000	23,078,000
Accumulated provision for uncollectible accounts	(503,000)	(547,000)
Fossil fuel stock, at average cost	160,060,000	140,173,000
Materials and supplies, at average cost	33,471,000	30,787,000
Prepaid income taxes	254,084,000	37,793,000
Other regulatory assets, current	51,134,000	69,201,000
Other current assets	5,635,000	8,881,000
Total current assets	829,567,000	587,821,000
Property, Plant, and Equipment:
In service	2,981,799,000	2,902,240,000
Less accumulated provision for depreciation	1,062,588,000	1,019,251,000
Plant in service, net of depreciation	1,919,211,000	1,882,989,000
Construction work in progress	2,077,283,000	955,135,000
Total property, plant, and equipment	3,996,494,000	2,838,124,000
Other Property and Investments:
Total other property and investments	4,464,000	6,520,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	44,901,000	25,009,000
Other regulatory assets, deferred	195,381,000	185,694,000
Other deferred charges and assets	48,715,000	28,674,000
Total deferred charges and other assets	288,997,000	239,377,000
Total Assets	5,119,522,000	3,671,842,000
Current Liabilities:
Securities due within one year	150,613,000	240,633,000
Interest-bearing refundable deposit related to asset sale	150,000,000	0
Affiliated	73,755,000	62,650,000
Accounts payable	267,166,000	168,309,000
Customer deposits	14,105,000	13,658,000
Accrued taxes --
Accrued income taxes	5,569,000	3,813,000
Other accrued taxes	54,722,000	53,825,000
Accrued interest	28,764,000	12,750,000
Accrued compensation	11,058,000	15,889,000
Liabilities from risk management activities	13,018,000	54,127,000
Other regulatory liabilities, current	6,395,000	5,779,000
Over recovered regulatory clause liabilities	71,484,000	60,502,000
Other current liabilities	16,591,000	17,533,000
Total current liabilities	863,240,000	709,468,000
Long-term Debt	1,616,524,000	1,103,596,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	380,030,000	270,397,000
Deferred credits related to income taxes	10,329,000	11,058,000
Accumulated deferred investment tax credits	286,097,000	109,761,000
Employee benefit obligations	163,471,000	161,065,000
Other cost of removal obligations	139,371,000	126,424,000
Other regulatory liabilities, deferred	58,610,000	60,848,000
Other deferred credits and liabilities	52,550,000	37,228,000
Total deferred credits and other liabilities	1,090,458,000	776,781,000
Total Liabilities	3,570,222,000	2,589,845,000
Redeemable Preferred Stock	32,780,000	32,780,000
Common Stockholders' Equity:
Common stock	37,691,000	37,691,000
Paid-in capital	1,127,378,000	694,855,000
Retained earnings	360,375,000	325,568,000
Accumulated other comprehensive loss	(8,924,000)	(8,897,000)
Total common stockholders' equity	1,516,520,000	1,049,217,000
Total Liabilities and Stockholders' Equity	5,119,522,000	3,671,842,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	16,061,000	16,943,000
Receivables --
Customer accounts receivable	73,109,000	59,360,000
Other accounts and notes receivable	1,870,000	2,122,000
Affiliated companies	48,421,000	36,508,000
Fossil fuel stock, at average cost	19,478,000	13,038,000
Materials and supplies, at average cost	44,103,000	37,603,000
Prepaid service agreements - current	66,219,000	28,621,000
Prepaid income taxes	7,052,000	5,192,000
Prepaid expenses	6,177,000	4,645,000
Assets from risk management activities	1,374,000	177,000
Total current assets	283,864,000	204,209,000
Property, Plant, and Equipment:
In service	3,714,129,000	3,167,840,000
Less accumulated provision for depreciation	748,336,000	652,087,000
Plant in service, net of depreciation	2,965,793,000	2,515,753,000
Construction work in progress	338,648,000	666,280,000
Total property, plant, and equipment	3,304,441,000	3,182,033,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization of $2,523 and $1,476 at September 30, 2012 and December 31, 2011, respectively	46,597,000	47,644,000
Total other property and investments	48,436,000	49,483,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	110,131,000	115,838,000
Other deferred charges and assets -- affiliated	2,848,000	3,029,000
Other deferred charges and assets	31,887,000	26,385,000
Total deferred charges and other assets	144,866,000	145,252,000
Total Assets	3,781,607,000	3,580,977,000
Current Liabilities:
Securities due within one year	0	555,000
Notes payable	102,403,000	179,520,000
Affiliated	67,756,000	63,609,000
Accounts payable	29,010,000	44,321,000
Accrued taxes --
Accrued income taxes	36,965,000	2,548,000
Other accrued taxes	14,062,000	2,158,000
Accrued interest	11,649,000	21,874,000
Liabilities from risk management activities	1,880,000	9,651,000
Other current liabilities	8,682,000	7,401,000
Total current liabilities	272,407,000	331,637,000
Long-term Debt	1,306,689,000	1,302,758,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	468,932,000	319,790,000
Deferred convertible investment tax credits	159,640,000	125,065,000
Deferred capacity revenues -- affiliated	36,454,000	20,637,000
Other deferred credits and liabilities — affiliated	2,893,000	3,618,000
Other deferred credits and liabilities	5,113,000	4,965,000
Total deferred credits and other liabilities	673,032,000	474,075,000
Total Liabilities	2,252,128,000	2,108,470,000
Redeemable Noncontrolling Interest	7,674,000	3,825,000
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	1,027,529,000	1,028,210,000
Retained earnings	496,345,000	447,301,000
Accumulated other comprehensive loss	(2,069,000)	(6,829,000)
Total common stockholders' equity	1,521,805,000	1,468,682,000
Total Liabilities and Stockholders' Equity	$ 3,781,607,000	$ 3,580,977,000