Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 1,044,000,000	$ 1,315,000,000
Restricted cash and cash equivalents	7,000,000	8,000,000
Receivables --
Customer accounts receivable	936,000,000	1,074,000,000
Unbilled revenues	358,000,000	376,000,000
Under recovered regulatory clause revenues	5,000,000	143,000,000
Other accounts and notes receivable	226,000,000	282,000,000
Accumulated provision for uncollectible accounts	(24,000,000)	(26,000,000)
Fossil fuel stock, at average cost	1,585,000,000	1,367,000,000
Materials and supplies, at average cost	898,000,000	903,000,000
Vacation pay	161,000,000	160,000,000
Prepaid expenses	519,000,000	385,000,000
Other regulatory assets, current	267,000,000	239,000,000
Other current assets	59,000,000	46,000,000
Total current assets	6,041,000,000	6,272,000,000
Property, Plant, and Equipment:
In service	60,073,000,000	59,744,000,000
Less accumulated provision for depreciation	21,327,000,000	21,154,000,000
Plant in service, net of depreciation	38,746,000,000	38,590,000,000
Other utility plant, net	54,000,000	55,000,000
Nuclear fuel, at amortized cost	830,000,000	774,000,000
Construction work in progress	6,225,000,000	5,591,000,000
Total property, plant, and equipment	45,855,000,000	45,010,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,280,000,000	1,207,000,000
Leveraged leases	654,000,000	649,000,000
Miscellaneous property and investments	260,000,000	262,000,000
Total other property and investments	2,194,000,000	2,118,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,381,000,000	1,365,000,000
Unamortized debt issuance expense	163,000,000	156,000,000
Unamortized loss on reacquired debt	279,000,000	285,000,000
Deferred under recovered regulatory clause revenues	24,000,000	48,000,000
Other regulatory assets, deferred	3,486,000,000	3,532,000,000
Other deferred charges and assets	451,000,000	481,000,000
Total deferred charges and other assets	5,784,000,000	5,867,000,000
Total Assets	59,874,000,000	59,267,000,000
Current Liabilities:
Securities due within one year	1,881,000,000	1,717,000,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Notes payable	1,029,000,000	859,000,000
Accounts payable	1,262,000,000	1,553,000,000
Customer deposits	358,000,000	347,000,000
Accrued taxes --
Accrued income taxes	51,000,000	13,000,000
Unrecognized tax benefits	12,000,000	22,000,000
Other accrued taxes	198,000,000	425,000,000
Accrued interest	249,000,000	226,000,000
Accrued vacation pay	204,000,000	205,000,000
Accrued compensation	158,000,000	450,000,000
Liabilities from risk management activities	219,000,000	209,000,000
Other regulatory liabilities, current	153,000,000	125,000,000
Other current liabilities	393,000,000	426,000,000
Total current liabilities	6,317,000,000	6,577,000,000
Long-term Debt	19,051,000,000	18,647,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	9,001,000,000	8,809,000,000
Deferred credits related to income taxes	220,000,000	224,000,000
Accumulated deferred investment tax credits	651,000,000	611,000,000
Employee benefit obligations	2,432,000,000	2,442,000,000
Asset retirement obligations	1,341,000,000	1,321,000,000
Other cost of removal obligations	1,178,000,000	1,165,000,000
Other regulatory liabilities, deferred	324,000,000	297,000,000
Other deferred credits and liabilities	578,000,000	514,000,000
Total deferred credits and other liabilities	15,725,000,000	15,383,000,000
Total Liabilities	41,093,000,000	40,607,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,346,000,000	4,328,000,000
Paid-in capital	4,550,000,000	4,410,000,000
Treasury, at cost	(18,000,000)	(17,000,000)
Retained earnings	8,926,000,000	8,968,000,000
Accumulated other comprehensive loss	(105,000,000)	(111,000,000)
Total common stockholders' equity	17,699,000,000	17,578,000,000
Preferred and Preference Stock of Subsidiaries	707,000,000	707,000,000
Total Stockholders' Equity	18,406,000,000	18,285,000,000
Total Liabilities and Stockholders' Equity	59,874,000,000	59,267,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	355,000,000	344,000,000
Restricted cash and cash equivalents		1,000,000
Receivables --
Customer accounts receivable	300,000,000	332,000,000
Unbilled revenues	116,000,000	126,000,000
Other accounts and notes receivable	35,000,000	35,000,000
Affiliated companies	50,000,000	79,000,000
Accumulated provision for uncollectible accounts	(10,000,000)	(10,000,000)
Fossil fuel stock, at average cost	425,000,000	344,000,000
Materials and supplies, at average cost	372,000,000	375,000,000
Vacation pay	59,000,000	59,000,000
Prepaid expenses	146,000,000	74,000,000
Other regulatory assets, current	48,000,000	44,000,000
Other current assets	12,000,000	11,000,000
Total current assets	1,908,000,000	1,814,000,000
Property, Plant, and Equipment:
In service	20,999,000,000	20,809,000,000
Less accumulated provision for depreciation	7,446,000,000	7,344,000,000
Plant in service, net of depreciation	13,553,000,000	13,465,000,000
Nuclear fuel, at amortized cost	363,000,000	330,000,000
Construction work in progress	339,000,000	374,000,000
Total property, plant, and equipment	14,255,000,000	14,169,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	62,000,000	62,000,000
Nuclear decommissioning trusts, at fair value	588,000,000	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	530,000,000	532,000,000
Prepaid pension costs	67,000,000	59,000,000
Deferred under recovered regulatory clause revenues	24,000,000	48,000,000
Other regulatory assets, deferred	995,000,000	994,000,000
Other deferred charges and assets	161,000,000	186,000,000
Total deferred charges and other assets	1,777,000,000	1,819,000,000
Total Assets	18,664,000,000	18,477,000,000
Current Liabilities:
Securities due within one year	750,000,000	500,000,000
Affiliated	163,000,000	203,000,000
Accounts payable	225,000,000	322,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	44,000,000	32,000,000
Other accrued taxes	54,000,000	34,000,000
Accrued interest	67,000,000	63,000,000
Accrued vacation pay	48,000,000	48,000,000
Accrued compensation	33,000,000	95,000,000
Liabilities from risk management activities	51,000,000	54,000,000
Other regulatory liabilities, current	19,000,000	18,000,000
Other current liabilities	40,000,000	38,000,000
Total current liabilities	1,580,000,000	1,492,000,000
Long-term Debt	5,630,000,000	5,632,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,287,000,000	3,257,000,000
Deferred credits related to income taxes	82,000,000	83,000,000
Accumulated deferred investment tax credits	147,000,000	149,000,000
Employee benefit obligations	343,000,000	343,000,000
Asset retirement obligations	561,000,000	553,000,000
Other cost of removal obligations	719,000,000	703,000,000
Other regulatory liabilities, deferred	193,000,000	156,000,000
Other deferred credits and liabilities	87,000,000	82,000,000
Total deferred credits and other liabilities	5,419,000,000	5,326,000,000
Total Liabilities	12,629,000,000	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	2,194,000,000	2,182,000,000
Retained earnings	1,948,000,000	1,956,000,000
Accumulated other comprehensive loss	(14,000,000)	(18,000,000)
Total common stockholders' equity	5,350,000,000	5,342,000,000
Total Liabilities and Stockholders' Equity	18,664,000,000	18,477,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	13,000,000	13,000,000
Receivables --
Customer accounts receivable	490,000,000	571,000,000
Unbilled revenues	166,000,000	172,000,000
Under recovered regulatory clause revenues		137,000,000
Joint owner accounts receivable	59,000,000	87,000,000
Other accounts and notes receivable	45,000,000	61,000,000
Affiliated companies	35,000,000	26,000,000
Accumulated provision for uncollectible accounts	(12,000,000)	(13,000,000)
Fossil fuel stock, at average cost	844,000,000	723,000,000
Materials and supplies, at average cost	400,000,000	406,000,000
Vacation pay	84,000,000	82,000,000
Prepaid income taxes	122,000,000	71,000,000
Other regulatory assets, current	118,000,000	108,000,000
Other current assets	84,000,000	106,000,000
Total current assets	2,448,000,000	2,550,000,000
Property, Plant, and Equipment:
In service	27,884,000,000	27,804,000,000
Less accumulated provision for depreciation	10,294,000,000	10,296,000,000
Plant in service, net of depreciation	17,590,000,000	17,508,000,000
Other utility plant, net	54,000,000	55,000,000
Nuclear fuel, at amortized cost	468,000,000	443,000,000
Construction work in progress	3,456,000,000	3,274,000,000
Total property, plant, and equipment	21,568,000,000	21,280,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	62,000,000	63,000,000
Nuclear decommissioning trusts, at fair value	692,000,000	667,000,000
Miscellaneous property and investments	45,000,000	44,000,000
Total other property and investments	799,000,000	774,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	757,000,000	756,000,000
Other regulatory assets, deferred	1,562,000,000	1,604,000,000
Other deferred charges and assets	203,000,000	187,000,000
Total deferred charges and other assets	2,522,000,000	2,547,000,000
Total Assets	27,337,000,000	27,151,000,000
Current Liabilities:
Securities due within one year	855,000,000	455,000,000
Notes payable	614,000,000	515,000,000
Affiliated	287,000,000	337,000,000
Accounts payable	470,000,000	686,000,000
Customer deposits	222,000,000	213,000,000
Accrued taxes --
Accrued income taxes	47,000,000	36,000,000
Unrecognized tax benefits	9,000,000	14,000,000
Other accrued taxes	89,000,000	304,000,000
Accrued interest	119,000,000	92,000,000
Accrued vacation pay	60,000,000	60,000,000
Accrued compensation	47,000,000	125,000,000
Liabilities from risk management activities	80,000,000	68,000,000
Other regulatory liabilities, current	84,000,000	65,000,000
Nuclear decommissioning trust securities lending collateral	12,000,000	32,000,000
Other current liabilities	144,000,000	139,000,000
Total current liabilities	3,139,000,000	3,141,000,000
Long-term Debt	8,117,000,000	8,018,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	4,491,000,000	4,388,000,000
Deferred credits related to income taxes	120,000,000	122,000,000
Accumulated deferred investment tax credits	217,000,000	220,000,000
Employee benefit obligations	901,000,000	905,000,000
Asset retirement obligations	745,000,000	734,000,000
Other cost of removal obligations	105,000,000	110,000,000
Other deferred credits and liabilities	254,000,000	224,000,000
Total deferred credits and other liabilities	6,833,000,000	6,703,000,000
Total Liabilities	18,089,000,000	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	5,540,000,000	5,522,000,000
Retained earnings	3,052,000,000	3,112,000,000
Accumulated other comprehensive loss	(8,000,000)	(9,000,000)
Total common stockholders' equity	8,982,000,000	9,023,000,000
Total Liabilities and Stockholders' Equity	27,337,000,000	27,151,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	19,110,000	17,328,000
Receivables --
Customer accounts receivable	54,868,000	72,754,000
Unbilled revenues	48,705,000	49,921,000
Under recovered regulatory clause revenues	4,536,000	5,530,000
Other accounts and notes receivable	11,546,000	13,350,000
Affiliated companies	19,986,000	14,844,000
Accumulated provision for uncollectible accounts	(1,433,000)	(1,962,000)
Fossil fuel stock, at average cost	146,023,000	147,567,000
Materials and supplies, at average cost	51,257,000	49,781,000
Prepaid expenses	44,153,000	28,327,000
Other regulatory assets, current	44,521,000	35,849,000
Other current assets	469,000	2,051,000
Total current assets	443,741,000	435,340,000
Property, Plant, and Equipment:
In service	3,898,726,000	3,846,446,000
Less accumulated provision for depreciation	1,140,589,000	1,124,291,000
Plant in service, net of depreciation	2,758,137,000	2,722,155,000
Construction work in progress	333,631,000	287,173,000
Total property, plant, and equipment	3,091,768,000	3,009,328,000
Other Property and Investments:
Total other property and investments	16,469,000	16,394,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	49,453,000	48,210,000
Other regulatory assets, deferred	316,519,000	323,116,000
Other deferred charges and assets	29,433,000	39,493,000
Total deferred charges and other assets	395,405,000	410,819,000
Total Assets	3,947,383,000	3,871,881,000
Current Liabilities:
Notes payable	83,589,000	114,507,000
Affiliated	45,716,000	54,874,000
Accounts payable	61,034,000	63,265,000
Customer deposits	36,010,000	35,779,000
Accrued taxes --
Accrued income taxes	104,000	1,362,000
Other accrued taxes	11,712,000	12,114,000
Accrued interest	19,312,000	14,018,000
Accrued compensation	5,294,000	14,485,000
Liabilities from risk management activities	30,811,000	22,786,000
Other regulatory liabilities, current	45,436,000	35,639,000
Other current liabilities	23,104,000	22,916,000
Total current liabilities	362,122,000	391,745,000
Long-term Debt	1,235,586,000	1,235,447,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	515,663,000	458,978,000
Accumulated deferred investment tax credits	6,422,000	6,760,000
Employee benefit obligations	109,589,000	109,740,000
Other cost of removal obligations	211,649,000	214,598,000
Other regulatory liabilities, deferred	45,300,000	44,843,000
Other deferred credits and liabilities	204,446,000	186,824,000
Total deferred credits and other liabilities	1,093,069,000	1,021,743,000
Total Liabilities	2,690,777,000	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	544,510,000	542,709,000
Retained earnings	223,049,000	231,333,000
Accumulated other comprehensive loss	(2,011,000)	(2,154,000)
Total common stockholders' equity	1,158,608,000	1,124,948,000
Total Liabilities and Stockholders' Equity	3,947,383,000	3,871,881,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	466,746,000	211,585,000
Receivables --
Customer accounts receivable	27,836,000	32,551,000
Unbilled revenues	27,231,000	27,239,000
Other accounts and notes receivable	3,716,000	7,080,000
Affiliated companies	19,463,000	23,078,000
Accumulated provision for uncollectible accounts	(415,000)	(547,000)
Fossil fuel stock, at average cost	156,360,000	140,173,000
Materials and supplies, at average cost	31,325,000	30,787,000
Prepaid income taxes	37,408,000	37,793,000
Other regulatory assets, current	75,249,000	69,201,000
Other current assets	10,000,000	8,881,000
Total current assets	854,919,000	587,821,000
Property, Plant, and Equipment:
In service	2,912,571,000	2,902,240,000
Less accumulated provision for depreciation	1,035,946,000	1,019,251,000
Plant in service, net of depreciation	1,876,625,000	1,882,989,000
Construction work in progress	1,323,400,000	955,135,000
Total property, plant, and equipment	3,200,025,000	2,838,124,000
Other Property and Investments:
Total other property and investments	6,288,000	6,520,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	39,703,000	25,009,000
Other regulatory assets, deferred	190,894,000	185,694,000
Other deferred charges and assets	30,422,000	28,674,000
Total deferred charges and other assets	261,019,000	239,377,000
Total Assets	4,322,251,000	3,671,842,000
Current Liabilities:
Securities due within one year	255,255,000	240,633,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Affiliated	50,786,000	62,650,000
Accounts payable	198,396,000	168,309,000
Customer deposits	13,993,000	13,658,000
Accrued taxes --
Accrued income taxes	5,922,000	3,813,000
Other accrued taxes	20,364,000	53,825,000
Accrued interest	22,264,000	12,750,000
Accrued compensation	5,086,000	15,889,000
Liabilities from risk management activities	39,649,000	54,127,000
Other regulatory liabilities, current	5,535,000	5,779,000
Over recovered regulatory clause liabilities	73,129,000	60,502,000
Other current liabilities	20,797,000	17,533,000
Total current liabilities	861,176,000	709,468,000
Long-term Debt	1,412,662,000	1,103,596,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	259,903,000	270,397,000
Deferred credits related to income taxes	10,800,000	11,058,000
Accumulated deferred investment tax credits	150,983,000	109,761,000
Employee benefit obligations	162,007,000	161,065,000
Other cost of removal obligations	130,909,000	126,424,000
Other regulatory liabilities, deferred	61,831,000	60,848,000
Other deferred credits and liabilities	39,700,000	37,228,000
Total deferred credits and other liabilities	816,133,000	776,781,000
Total Liabilities	3,089,971,000	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	847,035,000	694,855,000
Retained earnings	324,123,000	325,568,000
Accumulated other comprehensive loss	(9,349,000)	(8,897,000)
Total common stockholders' equity	1,199,500,000	1,049,217,000
Total Liabilities and Stockholders' Equity	4,322,251,000	3,671,842,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	2,968,000	16,943,000
Receivables --
Customer accounts receivable	58,192,000	59,360,000
Other accounts and notes receivable	1,779,000	2,122,000
Affiliated companies	25,609,000	36,508,000
Fossil fuel stock, at average cost	13,793,000	13,038,000
Materials and supplies, at average cost	38,769,000	37,603,000
Prepaid service agreements - current	27,234,000	28,621,000
Prepaid income taxes	19,050,000	5,192,000
Prepaid expenses	6,095,000	4,645,000
Assets from risk management activities	89,000	177,000
Total current assets	193,578,000	204,209,000
Property, Plant, and Equipment:
In service	3,158,331,000	3,167,840,000
Less accumulated provision for depreciation	680,297,000	652,087,000
Plant in service, net of depreciation	2,478,034,000	2,515,753,000
Construction work in progress	737,751,000	666,280,000
Total property, plant, and equipment	3,215,785,000	3,182,033,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization of $1,671 and $1,476 at March 31, 2012 and December 31, 2011, respectively	47,448,000	47,644,000
Total other property and investments	49,287,000	49,483,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	104,959,000	115,838,000
Other deferred charges and assets -- affiliated	2,969,000	3,029,000
Other deferred charges and assets	29,451,000	26,385,000
Total deferred charges and other assets	137,379,000	145,252,000
Total Assets	3,596,029,000	3,580,977,000
Current Liabilities:
Securities due within one year	550,000	555,000
Notes payable	199,685,000	179,520,000
Affiliated	42,838,000	63,609,000
Accounts payable	49,762,000	44,321,000
Accrued taxes --
Accrued income taxes	1,260,000	2,548,000
Other accrued taxes	5,812,000	2,158,000
Accrued interest	11,702,000	21,874,000
Liabilities from risk management activities	16,447,000	9,651,000
Other current liabilities	17,470,000	7,401,000
Total current liabilities	345,526,000	331,637,000
Long-term Debt	1,302,620,000	1,302,758,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	333,698,000	319,790,000
Deferred convertible investment tax credits	128,411,000	125,065,000
Deferred capacity revenues -- affiliated	4,658,000	20,637,000
Other deferred credits and liabilities -- affiliated	3,359,000	3,618,000
Other deferred credits and liabilities	5,130,000	4,965,000
Total deferred credits and other liabilities	475,256,000	474,075,000
Total Liabilities	2,123,402,000	2,108,470,000
Redeemable Noncontrolling Interest	3,923,000	3,825,000
Common Stockholders' Equity:
Common stock
Paid-in capital	1,029,430,000	1,028,210,000
Retained earnings	444,867,000	447,301,000
Accumulated other comprehensive loss	(5,593,000)	(6,829,000)
Total common stockholders' equity	1,468,704,000	1,468,682,000
Total Liabilities and Stockholders' Equity	$ 3,596,029,000	$ 3,580,977,000