Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 424,000,000	$ 628,000,000
Restricted cash and cash equivalents	7,000,000	7,000,000
Receivables --
Customer accounts receivable	1,164,000,000	961,000,000
Unbilled revenues	522,000,000	441,000,000
Under recovered regulatory clause revenues	45,000,000	29,000,000
Other accounts and notes receivable	251,000,000	235,000,000
Accumulated provision for uncollectible accounts	(16,000,000)	(17,000,000)
Fossil fuel stock, at average cost	1,634,000,000	1,819,000,000
Materials and supplies, at average cost	939,000,000	1,000,000,000
Vacation pay	166,000,000	165,000,000
Prepaid expenses	700,000,000	657,000,000
Other regulatory assets, current	130,000,000	163,000,000
Other current assets	35,000,000	74,000,000
Total current assets	6,001,000,000	6,162,000,000
Property, Plant, and Equipment:
In service	64,150,000,000	63,251,000,000
Less accumulated provision for depreciation	22,533,000,000	21,964,000,000
Plant in service, net of depreciation	41,617,000,000	41,287,000,000
Other utility plant, net	261,000,000	263,000,000
Nuclear fuel, at amortized cost	846,000,000	851,000,000
Construction work in progress	6,593,000,000	5,989,000,000
Total property, plant, and equipment	49,317,000,000	48,390,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,352,000,000	1,303,000,000
Leveraged leases	653,000,000	670,000,000
Miscellaneous property and investments	219,000,000	216,000,000
Total other property and investments	2,224,000,000	2,189,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,393,000,000	1,385,000,000
Unamortized debt issuance expense	141,000,000	133,000,000
Unamortized loss on reacquired debt	297,000,000	309,000,000
Other regulatory assets, deferred	4,041,000,000	4,032,000,000
Other deferred charges and assets	547,000,000	549,000,000
Total deferred charges and other assets	6,419,000,000	6,408,000,000
Total Assets	63,961,000,000	63,149,000,000
Current Liabilities:
Securities due within one year	2,085,000,000	2,335,000,000
Interest-bearing refundable deposit related to asset sale	150,000,000	150,000,000
Notes payable	1,587,000,000	825,000,000
Other accounts payable	1,467,000,000	1,387,000,000
Customer deposits	378,000,000	370,000,000
Accrued taxes --
Accrued income taxes	91,000,000	10,000,000
Other accrued taxes	351,000,000	391,000,000
Accrued interest	251,000,000	237,000,000
Accrued vacation pay	212,000,000	212,000,000
Accrued compensation	188,000,000	433,000,000
Liabilities from risk management activities	55,000,000	75,000,000
Other regulatory liabilities, current	66,000,000	107,000,000
Other current liabilities	465,000,000	482,000,000
Total current liabilities	7,346,000,000	7,014,000,000
Long-term Debt	19,943,000,000	19,274,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	9,944,000,000	9,938,000,000
Deferred credits related to income taxes	206,000,000	211,000,000
Accumulated deferred investment tax credits	936,000,000	894,000,000
Employee benefit obligations	2,504,000,000	2,540,000,000
Asset retirement obligations	1,840,000,000	1,748,000,000
Other cost of removal obligations	1,243,000,000	1,194,000,000
Other regulatory liabilities, deferred	320,000,000	289,000,000
Other deferred credits and liabilities	508,000,000	668,000,000
Total deferred credits and other liabilities	17,501,000,000	17,482,000,000
Total Liabilities	44,790,000,000	43,770,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,417,000,000	4,389,000,000
Paid-in capital	5,053,000,000	4,855,000,000
Treasury, at cost	(451,000,000)	(450,000,000)
Retained earnings	9,135,000,000	9,626,000,000
Accumulated other comprehensive loss	(114,000,000)	(123,000,000)
Total common stockholders' equity	18,040,000,000	18,297,000,000
Preferred and Preference Stock of Subsidiaries	756,000,000	707,000,000
Total Stockholders' Equity	18,796,000,000	19,004,000,000
Total Liabilities and Stockholders' Equity	63,961,000,000	63,149,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	59,000,000	137,000,000
Receivables --
Customer accounts receivable	380,000,000	321,000,000
Unbilled revenues	160,000,000	138,000,000
Under recovered regulatory clause revenues	8,000,000	23,000,000
Other accounts and notes receivable	55,000,000	42,000,000
Affiliated companies	36,000,000	55,000,000
Accumulated provision for uncollectible accounts	(9,000,000)	(8,000,000)
Fossil fuel stock, at average cost	399,000,000	475,000,000
Materials and supplies, at average cost	364,000,000	395,000,000
Vacation pay	61,000,000	61,000,000
Prepaid expenses	97,000,000	81,000,000
Other regulatory assets, current	16,000,000	24,000,000
Other current assets	3,000,000	13,000,000
Total current assets	1,629,000,000	1,757,000,000
Property, Plant, and Equipment:
In service	21,674,000,000	21,407,000,000
Less accumulated provision for depreciation	7,916,000,000	7,761,000,000
Plant in service, net of depreciation	13,758,000,000	13,646,000,000
Nuclear fuel, at amortized cost	366,000,000	354,000,000
Construction work in progress	555,000,000	438,000,000
Total property, plant, and equipment	14,679,000,000	14,438,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	55,000,000	53,000,000
Nuclear decommissioning trusts, at fair value	644,000,000	605,000,000
Miscellaneous property and investments	77,000,000	78,000,000
Total other property and investments	776,000,000	736,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	523,000,000	525,000,000
Deferred under recovered regulatory clause revenues	22,000,000	11,000,000
Other regulatory assets, deferred	1,075,000,000	1,083,000,000
Other deferred charges and assets	134,000,000	162,000,000
Total deferred charges and other assets	1,754,000,000	1,781,000,000
Total Assets	18,838,000,000	18,712,000,000
Current Liabilities:
Securities due within one year	250,000,000	250,000,000
Notes payable	46,000,000	0
Affiliated accounts payable	175,000,000	191,000,000
Other accounts payable	228,000,000	318,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	49,000,000	5,000,000
Other accrued taxes	82,000,000	33,000,000
Accrued interest	65,000,000	62,000,000
Accrued vacation pay	50,000,000	50,000,000
Accrued compensation	42,000,000	94,000,000
Liabilities from risk management activities	10,000,000	14,000,000
Other regulatory liabilities, current	16,000,000	3,000,000
Other current liabilities	37,000,000	38,000,000
Total current liabilities	1,136,000,000	1,143,000,000
Long-term Debt	5,934,000,000	5,929,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,443,000,000	3,404,000,000
Deferred credits related to income taxes	77,000,000	79,000,000
Accumulated deferred investment tax credits	137,000,000	141,000,000
Employee benefit obligations	310,000,000	321,000,000
Asset retirement obligations	609,000,000	589,000,000
Other cost of removal obligations	786,000,000	759,000,000
Other regulatory liabilities, deferred	192,000,000	183,000,000
Other deferred credits and liabilities	63,000,000	81,000,000
Total deferred credits and other liabilities	5,617,000,000	5,557,000,000
Total Liabilities	12,687,000,000	12,629,000,000
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	2,245,000,000	2,227,000,000
Retained earnings	2,026,000,000	1,976,000,000
Accumulated other comprehensive loss	(27,000,000)	(27,000,000)
Total common stockholders' equity	5,466,000,000	5,398,000,000
Total Liabilities and Stockholders' Equity	18,838,000,000	18,712,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	29,000,000	45,000,000
Receivables --
Customer accounts receivable	574,000,000	484,000,000
Unbilled revenues	251,000,000	217,000,000
Joint owner accounts receivable	58,000,000	51,000,000
Other accounts and notes receivable	69,000,000	68,000,000
Affiliated companies	21,000,000	23,000,000
Accumulated provision for uncollectible accounts	(6,000,000)	(6,000,000)
Fossil fuel stock, at average cost	936,000,000	992,000,000
Materials and supplies, at average cost	411,000,000	452,000,000
Vacation pay	85,000,000	85,000,000
Prepaid income taxes	133,000,000	164,000,000
Other regulatory assets, current	46,000,000	72,000,000
Other current assets	48,000,000	104,000,000
Total current assets	2,655,000,000	2,751,000,000
Property, Plant, and Equipment:
In service	29,672,000,000	29,244,000,000
Less accumulated provision for depreciation	10,737,000,000	10,431,000,000
Plant in service, net of depreciation	18,935,000,000	18,813,000,000
Other utility plant, net	261,000,000	263,000,000
Nuclear fuel, at amortized cost	481,000,000	497,000,000
Construction work in progress	3,206,000,000	2,893,000,000
Total property, plant, and equipment	22,883,000,000	22,466,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	47,000,000	45,000,000
Nuclear decommissioning trusts, at fair value	708,000,000	698,000,000
Miscellaneous property and investments	43,000,000	44,000,000
Total other property and investments	798,000,000	787,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	719,000,000	733,000,000
Other regulatory assets, deferred	1,801,000,000	1,798,000,000
Other deferred charges and assets	271,000,000	268,000,000
Total deferred charges and other assets	2,791,000,000	2,799,000,000
Total Assets	29,127,000,000	28,803,000,000
Current Liabilities:
Securities due within one year	1,030,000,000	1,680,000,000
Notes payable	314,000,000	2,000,000
Affiliated accounts payable	407,000,000	417,000,000
Other accounts payable	498,000,000	436,000,000
Customer deposits	243,000,000	237,000,000
Accrued taxes --
Accrued income taxes	85,000,000	6,000,000
Other accrued taxes	185,000,000	260,000,000
Accrued interest	105,000,000	100,000,000
Accrued vacation pay	60,000,000	61,000,000
Accrued compensation	51,000,000	113,000,000
Liabilities from risk management activities	21,000,000	30,000,000
Other regulatory liabilities, current	35,000,000	73,000,000
Over recovered regulatory clause liabilities	108,000,000	107,000,000
Other current liabilities	140,000,000	146,000,000
Total current liabilities	3,282,000,000	3,668,000,000
Long-term Debt	8,640,000,000	7,994,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	4,956,000,000	4,861,000,000
Deferred credits related to income taxes	114,000,000	115,000,000
Accumulated deferred investment tax credits	208,000,000	208,000,000
Employee benefit obligations	941,000,000	950,000,000
Asset retirement obligations	1,170,000,000	1,097,000,000
Other cost of removal obligations	67,000,000	63,000,000
Other deferred credits and liabilities	155,000,000	308,000,000
Total deferred credits and other liabilities	7,611,000,000	7,602,000,000
Total Liabilities	19,533,000,000	19,264,000,000
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	5,615,000,000	5,585,000,000
Retained earnings	3,321,000,000	3,297,000,000
Accumulated other comprehensive loss	(6,000,000)	(7,000,000)
Total common stockholders' equity	9,328,000,000	9,273,000,000
Total Liabilities and Stockholders' Equity	29,127,000,000	28,803,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	123,633,000	32,167,000
Receivables --
Customer accounts receivable	76,156,000	58,449,000
Unbilled revenues	66,575,000	53,363,000
Under recovered regulatory clause revenues	36,401,000	6,138,000
Other accounts and notes receivable	11,563,000	11,859,000
Affiliated companies	8,344,000	13,624,000
Accumulated provision for uncollectible accounts	(1,246,000)	(1,490,000)
Fossil fuel stock, at average cost	134,378,000	153,710,000
Materials and supplies, at average cost	54,352,000	53,365,000
Prepaid expenses	37,165,000	62,877,000
Other regulatory assets, current	27,889,000	30,576,000
Other current assets	3,545,000	2,690,000
Total current assets	578,755,000	477,328,000
Property, Plant, and Equipment:
In service	4,286,432,000	4,260,844,000
Less accumulated provision for depreciation	1,173,917,000	1,168,055,000
Plant in service, net of depreciation	3,112,515,000	3,092,789,000
Construction work in progress	220,134,000	136,062,000
Total property, plant, and equipment	3,332,649,000	3,228,851,000
Other Property and Investments:
Total other property and investments	15,628,000	15,737,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	51,190,000	50,139,000
Other regulatory assets, deferred	376,888,000	372,294,000
Other deferred charges and assets	33,473,000	33,053,000
Total deferred charges and other assets	461,551,000	455,486,000
Total Assets	4,388,583,000	4,177,402,000
Current Liabilities:
Securities due within one year	90,000,000	60,000,000
Notes payable	125,000,000	127,002,000
Affiliated accounts payable	73,600,000	66,161,000
Other accounts payable	45,342,000	54,551,000
Customer deposits	35,096,000	34,749,000
Accrued taxes --
Accrued income taxes	14,725,000	45,000
Other accrued taxes	20,441,000	7,036,000
Accrued interest	11,195,000	12,364,000
Accrued compensation	6,657,000	14,966,000
Liabilities from risk management activities	14,511,000	16,529,000
Other regulatory liabilities, current	6,666,000	25,887,000
Other current liabilities	20,187,000	19,930,000
Total current liabilities	463,420,000	439,220,000
Long-term Debt	1,245,248,000	1,185,870,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	675,960,000	648,952,000
Accumulated deferred investment tax credits	4,731,000	5,408,000
Employee benefit obligations	127,310,000	126,871,000
Other cost of removal obligations	220,782,000	213,413,000
Other regulatory liabilities, deferred	47,356,000	47,863,000
Deferred capacity expense	158,858,000	137,568,000
Other deferred credits and liabilities	78,100,000	93,497,000
Total deferred credits and other liabilities	1,313,097,000	1,273,572,000
Total Liabilities	3,021,765,000	2,898,662,000
Preference Stock	146,569,000	97,998,000
Common Stockholders' Equity:
Common stock	433,060,000	393,060,000
Paid-in capital	550,345,000	547,798,000
Retained earnings	238,139,000	241,465,000
Accumulated other comprehensive loss	(1,295,000)	(1,581,000)
Total common stockholders' equity	1,220,249,000	1,180,742,000
Total Liabilities and Stockholders' Equity	4,388,583,000	4,177,402,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	119,375,000	145,008,000
Receivables --
Customer accounts receivable	44,767,000	29,561,000
Unbilled revenues	44,531,000	32,688,000
Other accounts and notes receivable	4,432,000	7,517,000
Affiliated companies	38,093,000	27,160,000
Accumulated provision for uncollectible accounts	(364,000)	(373,000)
Fossil fuel stock, at average cost	142,189,000	176,378,000
Materials and supplies, at average cost	40,769,000	34,260,000
Prepaid income taxes	267,079,000	129,835,000
Other regulatory assets, current	59,418,000	55,302,000
Other current assets	34,674,000	17,170,000
Total current assets	794,963,000	654,506,000
Property, Plant, and Equipment:
In service	3,171,850,000	3,036,159,000
Less accumulated provision for depreciation	1,098,201,000	1,065,474,000
Plant in service, net of depreciation	2,073,649,000	1,970,685,000
Construction work in progress	2,183,548,000	2,393,145,000
Total property, plant, and equipment	4,257,197,000	4,363,830,000
Other Property and Investments:
Total other property and investments	4,939,000	4,887,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	95,233,000	71,869,000
Other regulatory assets, deferred	251,268,000	236,225,000
Other deferred charges and assets	34,415,000	42,304,000
Total deferred charges and other assets	380,916,000	350,398,000
Total Assets	5,438,015,000	5,373,621,000
Current Liabilities:
Securities due within one year	342,285,000	276,471,000
Interest-bearing refundable deposit related to asset sale	150,000,000	150,000,000
Affiliated accounts payable	57,523,000	54,769,000
Other accounts payable	278,121,000	262,992,000
Customer deposits	14,490,000	14,202,000
Accrued taxes --
Accrued income taxes	7,208,000	2,339,000
Other accrued taxes	40,912,000	69,376,000
Accrued interest	38,878,000	30,376,000
Accrued compensation	5,244,000	15,706,000
Liabilities from risk management activities	8,947,000	13,116,000
Other regulatory liabilities, current	9,101,000	5,376,000
Over recovered regulatory clause liabilities	49,500,000	77,338,000
Other current liabilities	18,769,000	18,766,000
Total current liabilities	1,020,978,000	990,827,000
Long-term Debt	1,866,835,000	1,564,462,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	99,251,000	244,958,000
Deferred credits related to income taxes	9,240,000	10,106,000
Accumulated deferred investment tax credits	420,376,000	370,554,000
Employee benefit obligations	158,006,000	157,421,000
Other cost of removal obligations	152,211,000	143,461,000
Other regulatory liabilities, deferred	79,995,000	56,984,000
Other deferred credits and liabilities	49,664,000	52,860,000
Total deferred credits and other liabilities	968,743,000	1,036,344,000
Total Liabilities	3,856,556,000	3,591,633,000
Redeemable Preferred Stock	32,780,000	32,780,000
Common Stockholders' Equity:
Common stock	37,691,000	37,691,000
Paid-in capital	1,737,952,000	1,401,520,000
Retained earnings	(218,676,000)	318,710,000
Accumulated other comprehensive loss	(8,288,000)	(8,713,000)
Total common stockholders' equity	1,548,679,000	1,749,208,000
Total Liabilities and Stockholders' Equity	5,438,015,000	5,373,621,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	14,867,000	28,592,000
Receivables --
Customer accounts receivable	85,142,000	62,857,000
Other accounts and notes receivable	2,567,000	3,135,000
Affiliated companies	40,008,000	38,269,000
Fossil fuel stock, at average cost	21,993,000	21,616,000
Materials and supplies, at average cost	50,957,000	46,370,000
Prepaid service agreements - current	81,509,000	80,629,000
Prepaid income taxes	7,857,000	4,498,000
Prepaid expenses	2,848,000	5,637,000
Assets from risk management activities	157,000	375,000
Total current assets	307,905,000	291,978,000
Property, Plant, and Equipment:
In service	4,076,217,000	4,059,839,000
Less accumulated provision for depreciation	828,819,000	786,620,000
Plant in service, net of depreciation	3,247,398,000	3,273,219,000
Construction work in progress	399,616,000	24,835,000
Total property, plant, and equipment	3,647,014,000	3,298,054,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization of $4,378 and $3,141 at June 30, 2013 and December 31, 2012, respectively	44,742,000	45,979,000
Total other property and investments	46,581,000	47,818,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	63,929,000	100,921,000
Other deferred charges and assets -- affiliated	6,752,000	3,468,000
Other deferred charges and assets	67,134,000	37,688,000
Total deferred charges and other assets	137,815,000	142,077,000
Total Assets	4,139,315,000	3,779,927,000
Current Liabilities:
Securities due within one year	1,430,000	259,000
Notes payable	266,110,000	70,968,000
Affiliated accounts payable	65,030,000	65,832,000
Other accounts payable	126,728,000	26,204,000
Accrued taxes --
Accrued income taxes	17,030,000	87,000
Other accrued taxes	9,957,000	3,031,000
Accrued interest	22,218,000	22,259,000
Construction holdbacks	31,000,000	6,000,000
Liabilities from risk management activities	593,000	669,000
Other current liabilities	3,241,000	2,263,000
Total current liabilities	543,337,000	197,572,000
Long-term Debt	1,314,970,000	1,306,099,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	566,531,000	550,685,000
Deferred convertible investment tax credits	164,878,000	167,130,000
Deferred capacity revenues -- affiliated	6,629,000	19,514,000
Other deferred credits and liabilities — affiliated	2,130,000	2,638,000
Other deferred credits and liabilities	4,032,000	5,863,000
Total deferred credits and other liabilities	744,200,000	745,830,000
Total Liabilities	2,602,507,000	2,249,501,000
Redeemable Noncontrolling Interest	17,222,000	8,069,000
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	1,028,942,000	1,027,548,000
Retained earnings	488,139,000	495,585,000
Accumulated other comprehensive loss	2,505,000	(776,000)
Total common stockholders' equity	1,519,586,000	1,522,357,000
Total Liabilities and Stockholders' Equity	$ 4,139,315,000	$ 3,779,927,000