Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 659,000,000	$ 1,315,000,000
Restricted cash and cash equivalents	192,000,000	8,000,000
Receivables --
Customer accounts receivable	1,164,000,000	1,074,000,000
Unbilled revenues	497,000,000	376,000,000
Under recovered regulatory clause revenues	20,000,000	143,000,000
Other accounts and notes receivable	261,000,000	282,000,000
Accumulated provision for uncollectible accounts	(23,000,000)	(26,000,000)
Fossil fuel stock, at average cost	1,672,000,000	1,367,000,000
Materials and supplies, at average cost	919,000,000	903,000,000
Vacation pay	161,000,000	160,000,000
Prepaid expenses	577,000,000	385,000,000
Other regulatory assets, current	208,000,000	239,000,000
Other current assets	66,000,000	46,000,000
Total current assets	6,373,000,000	6,272,000,000
Property, Plant, and Equipment:
In service	61,577,000,000	59,744,000,000
Less accumulated provision for depreciation	21,616,000,000	21,154,000,000
Plant in service, net of depreciation	39,961,000,000	38,590,000,000
Other utility plant, net	53,000,000	55,000,000
Nuclear fuel, at amortized cost	807,000,000	774,000,000
Construction work in progress	5,745,000,000	5,591,000,000
Total property, plant, and equipment	46,566,000,000	45,010,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,235,000,000	1,207,000,000
Leveraged leases	660,000,000	649,000,000
Miscellaneous property and investments	260,000,000	262,000,000
Total other property and investments	2,155,000,000	2,118,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,390,000,000	1,365,000,000
Unamortized debt issuance expense	157,000,000	156,000,000
Unamortized loss on reacquired debt	288,000,000	285,000,000
Deferred under recovered regulatory clause revenues	29,000,000	48,000,000
Other regulatory assets, deferred	3,484,000,000	3,532,000,000
Other deferred charges and assets	455,000,000	481,000,000
Total deferred charges and other assets	5,803,000,000	5,867,000,000
Total Assets	60,897,000,000	59,267,000,000
Current Liabilities:
Securities due within one year	2,075,000,000	1,717,000,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Notes payable	453,000,000	859,000,000
Accounts payable	1,253,000,000	1,553,000,000
Customer deposits	363,000,000	347,000,000
Accrued taxes --
Accrued income taxes	17,000,000	13,000,000
Unrecognized tax benefits	6,000,000	22,000,000
Other accrued taxes	337,000,000	425,000,000
Accrued interest	237,000,000	226,000,000
Accrued vacation pay	204,000,000	205,000,000
Accrued compensation	246,000,000	450,000,000
Liabilities from risk management activities	160,000,000	209,000,000
Other regulatory liabilities, current	144,000,000	125,000,000
Other current liabilities	443,000,000	426,000,000
Total current liabilities	6,088,000,000	6,577,000,000
Long-term Debt	19,459,000,000	18,647,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	9,352,000,000	8,809,000,000
Deferred credits related to income taxes	216,000,000	224,000,000
Accumulated deferred investment tax credits	704,000,000	611,000,000
Employee benefit obligations	2,409,000,000	2,442,000,000
Asset retirement obligations	1,385,000,000	1,321,000,000
Other cost of removal obligations	1,195,000,000	1,165,000,000
Other regulatory liabilities, deferred	295,000,000	297,000,000
Other deferred credits and liabilities	588,000,000	514,000,000
Total deferred credits and other liabilities	16,144,000,000	15,383,000,000
Total Liabilities	41,691,000,000	40,607,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,377,000,000	4,328,000,000
Paid-in capital	4,755,000,000	4,410,000,000
Treasury, at cost	(18,000,000)	(17,000,000)
Retained earnings	9,122,000,000	8,968,000,000
Accumulated other comprehensive loss	(112,000,000)	(111,000,000)
Total common stockholders' equity	18,124,000,000	17,578,000,000
Preferred and Preference Stock of Subsidiaries	707,000,000	707,000,000
Total Stockholders' Equity	18,831,000,000	18,285,000,000
Total Liabilities and Stockholders' Equity	60,897,000,000	59,267,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	78,000,000	344,000,000
Restricted cash and cash equivalents		1,000,000
Receivables --
Customer accounts receivable	368,000,000	332,000,000
Unbilled revenues	160,000,000	126,000,000
Under recovered regulatory clause revenues	16,000,000
Other accounts and notes receivable	34,000,000	35,000,000
Affiliated companies	57,000,000	79,000,000
Accumulated provision for uncollectible accounts	(9,000,000)	(10,000,000)
Fossil fuel stock, at average cost	469,000,000	344,000,000
Materials and supplies, at average cost	380,000,000	375,000,000
Vacation pay	59,000,000	59,000,000
Prepaid expenses	135,000,000	74,000,000
Other regulatory assets, current	32,000,000	44,000,000
Other current assets	8,000,000	11,000,000
Total current assets	1,787,000,000	1,814,000,000
Property, Plant, and Equipment:
In service	21,110,000,000	20,809,000,000
Less accumulated provision for depreciation	7,562,000,000	7,344,000,000
Plant in service, net of depreciation	13,548,000,000	13,465,000,000
Nuclear fuel, at amortized cost	347,000,000	330,000,000
Construction work in progress	390,000,000	374,000,000
Total property, plant, and equipment	14,285,000,000	14,169,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	61,000,000	62,000,000
Nuclear decommissioning trusts, at fair value	571,000,000	540,000,000
Miscellaneous property and investments	73,000,000	73,000,000
Total other property and investments	705,000,000	675,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	529,000,000	532,000,000
Prepaid pension costs	74,000,000	59,000,000
Deferred under recovered regulatory clause revenues	29,000,000	48,000,000
Other regulatory assets, deferred	1,001,000,000	994,000,000
Other deferred charges and assets	144,000,000	186,000,000
Total deferred charges and other assets	1,777,000,000	1,819,000,000
Total Assets	18,554,000,000	18,477,000,000
Current Liabilities:
Securities due within one year	500,000,000	500,000,000
Affiliated	176,000,000	203,000,000
Accounts payable	196,000,000	322,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	99,000,000	32,000,000
Other accrued taxes	80,000,000	34,000,000
Accrued interest	65,000,000	63,000,000
Accrued vacation pay	48,000,000	48,000,000
Accrued compensation	51,000,000	95,000,000
Liabilities from risk management activities	54,000,000	54,000,000
Other regulatory liabilities, current	3,000,000	18,000,000
Other current liabilities	40,000,000	38,000,000
Total current liabilities	1,398,000,000	1,492,000,000
Long-term Debt	5,630,000,000	5,632,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,319,000,000	3,257,000,000
Deferred credits related to income taxes	81,000,000	83,000,000
Accumulated deferred investment tax credits	145,000,000	149,000,000
Employee benefit obligations	339,000,000	343,000,000
Asset retirement obligations	571,000,000	553,000,000
Other cost of removal obligations	736,000,000	703,000,000
Other regulatory liabilities, deferred	165,000,000	156,000,000
Other deferred credits and liabilities	84,000,000	82,000,000
Total deferred credits and other liabilities	5,440,000,000	5,326,000,000
Total Liabilities	12,468,000,000	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	2,207,000,000	2,182,000,000
Retained earnings	1,997,000,000	1,956,000,000
Accumulated other comprehensive loss	(25,000,000)	(18,000,000)
Total common stockholders' equity	5,401,000,000	5,342,000,000
Total Liabilities and Stockholders' Equity	18,554,000,000	18,477,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	188,000,000	13,000,000
Restricted cash and cash equivalents	185,000,000
Receivables --
Customer accounts receivable	596,000,000	571,000,000
Unbilled revenues	244,000,000	172,000,000
Under recovered regulatory clause revenues		137,000,000
Joint owner accounts receivable	45,000,000	87,000,000
Other accounts and notes receivable	98,000,000	61,000,000
Affiliated companies	55,000,000	26,000,000
Accumulated provision for uncollectible accounts	(12,000,000)	(13,000,000)
Fossil fuel stock, at average cost	870,000,000	723,000,000
Materials and supplies, at average cost	391,000,000	406,000,000
Vacation pay	84,000,000	82,000,000
Prepaid income taxes	140,000,000	71,000,000
Other regulatory assets, current	93,000,000	108,000,000
Other current assets	81,000,000	106,000,000
Total current assets	3,058,000,000	2,550,000,000
Property, Plant, and Equipment:
In service	28,549,000,000	27,804,000,000
Less accumulated provision for depreciation	10,395,000,000	10,296,000,000
Plant in service, net of depreciation	18,154,000,000	17,508,000,000
Other utility plant, net	53,000,000	55,000,000
Nuclear fuel, at amortized cost	460,000,000	443,000,000
Construction work in progress	3,055,000,000	3,274,000,000
Total property, plant, and equipment	21,722,000,000	21,280,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	61,000,000	63,000,000
Nuclear decommissioning trusts, at fair value	665,000,000	667,000,000
Miscellaneous property and investments	44,000,000	44,000,000
Total other property and investments	770,000,000	774,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	757,000,000	756,000,000
Other regulatory assets, deferred	1,550,000,000	1,604,000,000
Other deferred charges and assets	221,000,000	187,000,000
Total deferred charges and other assets	2,528,000,000	2,547,000,000
Total Assets	28,078,000,000	27,151,000,000
Current Liabilities:
Securities due within one year	1,340,000,000	455,000,000
Notes payable	2,000,000	515,000,000
Affiliated	357,000,000	337,000,000
Accounts payable	451,000,000	686,000,000
Customer deposits	227,000,000	213,000,000
Accrued taxes --
Accrued income taxes	110,000,000	36,000,000
Other accrued taxes	175,000,000	304,000,000
Accrued interest	108,000,000	92,000,000
Accrued vacation pay	60,000,000	60,000,000
Accrued compensation	67,000,000	125,000,000
Liabilities from risk management activities	52,000,000	68,000,000
Other regulatory liabilities, current	79,000,000	65,000,000
Nuclear decommissioning trust securities lending collateral	8,000,000	32,000,000
Other current liabilities	197,000,000	153,000,000
Total current liabilities	3,233,000,000	3,141,000,000
Long-term Debt	8,570,000,000	8,018,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	4,608,000,000	4,388,000,000
Deferred credits related to income taxes	118,000,000	122,000,000
Accumulated deferred investment tax credits	214,000,000	220,000,000
Employee benefit obligations	892,000,000	905,000,000
Asset retirement obligations	759,000,000	734,000,000
Other cost of removal obligations	97,000,000	110,000,000
Other deferred credits and liabilities	255,000,000	224,000,000
Total deferred credits and other liabilities	6,943,000,000	6,703,000,000
Total Liabilities	18,746,000,000	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	5,557,000,000	5,522,000,000
Retained earnings	3,119,000,000	3,112,000,000
Accumulated other comprehensive loss	(8,000,000)	(9,000,000)
Total common stockholders' equity	9,066,000,000	9,023,000,000
Total Liabilities and Stockholders' Equity	28,078,000,000	27,151,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	21,163,000	17,328,000
Receivables --
Customer accounts receivable	83,682,000	72,754,000
Unbilled revenues	57,575,000	49,921,000
Under recovered regulatory clause revenues	4,070,000	5,530,000
Other accounts and notes receivable	10,819,000	13,350,000
Affiliated companies	15,189,000	14,844,000
Accumulated provision for uncollectible accounts	(1,463,000)	(1,962,000)
Fossil fuel stock, at average cost	143,588,000	147,567,000
Materials and supplies, at average cost	53,881,000	49,781,000
Prepaid expenses	71,492,000	28,327,000
Other regulatory assets, current	35,670,000	35,849,000
Other current assets	1,523,000	2,051,000
Total current assets	497,189,000	435,340,000
Property, Plant, and Equipment:
In service	4,130,575,000	3,846,446,000
Less accumulated provision for depreciation	1,154,842,000	1,124,291,000
Plant in service, net of depreciation	2,975,733,000	2,722,155,000
Construction work in progress	158,639,000	287,173,000
Total property, plant, and equipment	3,134,372,000	3,009,328,000
Other Property and Investments:
Total other property and investments	16,377,000	16,394,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	50,696,000	48,210,000
Other regulatory assets, deferred	332,325,000	323,116,000
Other deferred charges and assets	27,567,000	39,493,000
Total deferred charges and other assets	410,588,000	410,819,000
Total Assets	4,058,526,000	3,871,881,000
Current Liabilities:
Notes payable	116,907,000	114,507,000
Affiliated	58,897,000	54,874,000
Accounts payable	50,348,000	63,265,000
Customer deposits	36,028,000	35,779,000
Accrued taxes --
Accrued income taxes	68,000	1,362,000
Other accrued taxes	20,147,000	12,114,000
Accrued interest	11,911,000	14,018,000
Accrued compensation	8,245,000	14,485,000
Liabilities from risk management activities	20,485,000	22,786,000
Other regulatory liabilities, current	56,999,000	35,639,000
Other current liabilities	23,880,000	22,916,000
Total current liabilities	403,915,000	391,745,000
Long-term Debt	1,245,567,000	1,235,447,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	559,600,000	458,978,000
Accumulated deferred investment tax credits	6,084,000	6,760,000
Employee benefit obligations	109,200,000	109,740,000
Other cost of removal obligations	212,981,000	214,598,000
Other regulatory liabilities, deferred	47,229,000	44,843,000
Other deferred credits and liabilities	209,965,000	186,824,000
Total deferred credits and other liabilities	1,145,059,000	1,021,743,000
Total Liabilities	2,794,541,000	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	545,733,000	542,709,000
Retained earnings	229,062,000	231,333,000
Accumulated other comprehensive loss	(1,868,000)	(2,154,000)
Total common stockholders' equity	1,165,987,000	1,124,948,000
Total Liabilities and Stockholders' Equity	4,058,526,000	3,871,881,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	153,380,000	211,585,000
Receivables --
Customer accounts receivable	37,632,000	32,551,000
Unbilled revenues	36,060,000	27,239,000
Other accounts and notes receivable	5,072,000	7,080,000
Affiliated companies	25,497,000	23,078,000
Accumulated provision for uncollectible accounts	(306,000)	(547,000)
Fossil fuel stock, at average cost	172,970,000	140,173,000
Materials and supplies, at average cost	30,576,000	30,787,000
Prepaid income taxes	192,067,000	37,793,000
Other regulatory assets, current	65,251,000	69,201,000
Other current assets	6,230,000	8,881,000
Total current assets	724,429,000	587,821,000
Property, Plant, and Equipment:
In service	2,956,019,000	2,902,240,000
Less accumulated provision for depreciation	1,052,399,000	1,019,251,000
Plant in service, net of depreciation	1,903,620,000	1,882,989,000
Construction work in progress	1,699,239,000	955,135,000
Total property, plant, and equipment	3,602,859,000	2,838,124,000
Other Property and Investments:
Total other property and investments	5,970,000	6,520,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	47,979,000	25,009,000
Other regulatory assets, deferred	195,721,000	185,694,000
Other deferred charges and assets	37,640,000	28,674,000
Total deferred charges and other assets	281,340,000	239,377,000
Total Assets	4,614,598,000	3,671,842,000
Current Liabilities:
Securities due within one year	165,000,000	240,633,000
Interest-bearing refundable deposit related to asset sale	150,000,000
Affiliated	62,007,000	62,650,000
Accounts payable	228,506,000	168,309,000
Customer deposits	14,190,000	13,658,000
Accrued taxes --
Accrued income taxes	3,803,000	3,813,000
Other accrued taxes	37,327,000	53,825,000
Accrued interest	20,095,000	12,750,000
Accrued compensation	8,887,000	15,889,000
Liabilities from risk management activities	26,699,000	54,127,000
Other regulatory liabilities, current	5,553,000	5,779,000
Over recovered regulatory clause liabilities	76,373,000	60,502,000
Other current liabilities	21,913,000	17,533,000
Total current liabilities	820,353,000	709,468,000
Long-term Debt	1,410,660,000	1,103,596,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	377,763,000	270,397,000
Deferred credits related to income taxes	10,536,000	11,058,000
Accumulated deferred investment tax credits	206,607,000	109,761,000
Employee benefit obligations	162,266,000	161,065,000
Other cost of removal obligations	135,540,000	126,424,000
Other regulatory liabilities, deferred	64,710,000	60,848,000
Other deferred credits and liabilities	57,181,000	37,228,000
Total deferred credits and other liabilities	1,014,603,000	776,781,000
Total Liabilities	3,245,616,000	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	975,198,000	694,855,000
Retained earnings	332,450,000	325,568,000
Accumulated other comprehensive loss	(9,137,000)	(8,897,000)
Total common stockholders' equity	1,336,202,000	1,049,217,000
Total Liabilities and Stockholders' Equity	4,614,598,000	3,671,842,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	3,832,000	16,943,000
Receivables --
Customer accounts receivable	74,413,000	59,360,000
Other accounts and notes receivable	2,792,000	2,122,000
Affiliated companies	52,796,000	36,508,000
Fossil fuel stock, at average cost	16,339,000	13,038,000
Materials and supplies, at average cost	45,700,000	37,603,000
Prepaid service agreements - current	59,784,000	28,621,000
Prepaid income taxes	43,720,000	5,192,000
Prepaid expenses	4,390,000	4,645,000
Assets from risk management activities	393,000	177,000
Total current assets	304,159,000	204,209,000
Property, Plant, and Equipment:
In service	3,602,377,000	3,167,840,000
Less accumulated provision for depreciation	710,351,000	652,087,000
Plant in service, net of depreciation	2,892,026,000	2,515,753,000
Construction work in progress	407,289,000	666,280,000
Total property, plant, and equipment	3,299,315,000	3,182,033,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization of $1,867 and $1,476 at June 30, 2012 and December 31, 2011, respectively	47,253,000	47,644,000
Total other property and investments	49,092,000	49,483,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	100,971,000	115,838,000
Other deferred charges and assets -- affiliated	5,259,000	3,029,000
Other deferred charges and assets	26,637,000	26,385,000
Total deferred charges and other assets	132,867,000	145,252,000
Total Assets	3,785,433,000	3,580,977,000
Current Liabilities:
Securities due within one year		555,000
Notes payable	289,241,000	179,520,000
Affiliated	60,378,000	63,609,000
Accounts payable	46,360,000	44,321,000
Accrued taxes --
Accrued income taxes	5,473,000	2,548,000
Other accrued taxes	10,526,000	2,158,000
Accrued interest	22,284,000	21,874,000
Liabilities from risk management activities	6,645,000	9,651,000
Other current liabilities	18,940,000	7,401,000
Total current liabilities	459,847,000	331,637,000
Long-term Debt	1,303,691,000	1,302,758,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	382,832,000	319,790,000
Deferred convertible investment tax credits	131,696,000	125,065,000
Deferred capacity revenues -- affiliated	8,389,000	20,637,000
Other deferred credits and liabilities -- affiliated	3,147,000	3,618,000
Other deferred credits and liabilities	4,743,000	4,965,000
Total deferred credits and other liabilities	530,807,000	474,075,000
Total Liabilities	2,294,345,000	2,108,470,000
Redeemable Noncontrolling Interest	6,644,000	3,825,000
Common Stockholders' Equity:
Paid-in capital	1,028,701,000	1,028,210,000
Retained earnings	459,719,000	447,301,000
Accumulated other comprehensive loss	(3,976,000)	(6,829,000)
Total common stockholders' equity	1,484,444,000	1,468,682,000
Total Liabilities and Stockholders' Equity	$ 3,785,433,000	$ 3,580,977,000