Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 590,000,000	$ 659,000,000
Receivables --
Customer accounts receivable	1,063,000,000	1,027,000,000
Unbilled revenues	382,000,000	448,000,000
Under recovered regulatory clause revenues	72,000,000	58,000,000
Other accounts and notes receivable	306,000,000	304,000,000
Accumulated provision for uncollectible accounts	(17,000,000)	(18,000,000)
Fossil fuel stock, at average cost	898,000,000	1,339,000,000
Materials and supplies, at average cost	963,000,000	959,000,000
Vacation pay	171,000,000	171,000,000
Prepaid expenses	525,000,000	489,000,000
Other regulatory assets, current	117,000,000	124,000,000
Other current assets	70,000,000	39,000,000
Total current assets	5,140,000,000	5,599,000,000
Property, Plant, and Equipment:
In service	66,369,000,000	66,021,000,000
Less accumulated provision for depreciation	23,329,000,000	23,059,000,000
Plant in service, net of depreciation	43,040,000,000	42,962,000,000
Other utility plant, net	234,000,000	240,000,000
Nuclear fuel, at amortized cost	874,000,000	855,000,000
Construction work in progress	7,425,000,000	7,151,000,000
Total property, plant, and equipment	51,573,000,000	51,208,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,513,000,000	1,465,000,000
Leveraged leases	670,000,000	665,000,000
Miscellaneous property and investments	224,000,000	218,000,000
Total other property and investments	2,407,000,000	2,348,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,448,000,000	1,432,000,000
Prepaid pension costs	423,000,000	419,000,000
Unamortized debt issuance expense	202,000,000	139,000,000
Unamortized loss on reacquired debt	286,000,000	293,000,000
Other regulatory assets, deferred	2,654,000,000	2,557,000,000
Other deferred charges and assets	705,000,000	551,000,000
Total deferred charges and other assets	5,718,000,000	5,391,000,000
Total Assets	64,838,000,000	64,546,000,000
Current Liabilities:
Securities due within one year	768,000,000	469,000,000
Interest-bearing refundable deposit related to asset sale	225,000,000	150,000,000
Notes payable	598,000,000	1,482,000,000
Other accounts payable	1,386,000,000	1,376,000,000
Customer deposits	384,000,000	380,000,000
Accrued taxes --
Accrued income taxes	114,000,000	13,000,000
Other accrued taxes	243,000,000	456,000,000
Accrued interest	253,000,000	251,000,000
Accrued vacation pay	213,000,000	217,000,000
Accrued compensation	177,000,000	303,000,000
Other regulatory liabilities, current	116,000,000	92,000,000
Other current liabilities	358,000,000	347,000,000
Total current liabilities	4,835,000,000	5,536,000,000
Long-term Debt	22,288,000,000	21,344,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	10,558,000,000	10,563,000,000
Deferred credits related to income taxes	197,000,000	202,000,000
Accumulated deferred investment tax credits	962,000,000	966,000,000
Employee benefit obligations	1,446,000,000	1,461,000,000
Asset retirement obligations	2,004,000,000	2,006,000,000
Other cost of removal obligations	1,298,000,000	1,270,000,000
Other regulatory liabilities, deferred	481,000,000	475,000,000
Other deferred credits and liabilities	568,000,000	584,000,000
Total deferred credits and other liabilities	17,514,000,000	17,527,000,000
Total Liabilities	44,637,000,000	44,407,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,467,000,000	4,461,000,000
Paid-in capital	5,405,000,000	5,362,000,000
Treasury, at cost	(139,000,000)	(250,000,000)
Retained earnings	9,410,000,000	9,510,000,000
Accumulated other comprehensive loss	(73,000,000)	(75,000,000)
Total common stockholders' equity	19,070,000,000	19,008,000,000
Preferred and Preference Stock of Subsidiaries	756,000,000	756,000,000
Total Stockholders' Equity	19,826,000,000	19,764,000,000
Total Liabilities and Stockholders' Equity	64,838,000,000	64,546,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	252,000,000	295,000,000
Receivables --
Customer accounts receivable	363,000,000	341,000,000
Unbilled revenues	116,000,000	142,000,000
Other accounts and notes receivable	33,000,000	30,000,000
Affiliated companies	63,000,000	54,000,000
Accumulated provision for uncollectible accounts	(8,000,000)	(8,000,000)
Fossil fuel stock, at average cost	230,000,000	329,000,000
Materials and supplies, at average cost	373,000,000	375,000,000
Vacation pay	63,000,000	63,000,000
Prepaid expenses	146,000,000	57,000,000
Other regulatory assets, current	5,000,000	7,000,000
Other current assets	13,000,000	6,000,000
Total current assets	1,649,000,000	1,691,000,000
Property, Plant, and Equipment:
In service	22,234,000,000	22,092,000,000
Less accumulated provision for depreciation	8,226,000,000	8,114,000,000
Plant in service, net of depreciation	14,008,000,000	13,978,000,000
Nuclear fuel, at amortized cost	342,000,000	332,000,000
Construction work in progress	829,000,000	748,000,000
Total property, plant, and equipment	15,179,000,000	15,058,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	56,000,000	54,000,000
Nuclear decommissioning trusts, at fair value	727,000,000	714,000,000
Miscellaneous property and investments	81,000,000	80,000,000
Total other property and investments	864,000,000	848,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	522,000,000	519,000,000
Prepaid pension costs	279,000,000	276,000,000
Deferred under recovered regulatory clause revenues	36,000,000	25,000,000
Other regulatory assets, deferred	707,000,000	692,000,000
Other deferred charges and assets	126,000,000	142,000,000
Total deferred charges and other assets	1,670,000,000	1,654,000,000
Total Assets	19,362,000,000	19,251,000,000
Current Liabilities:
Affiliated accounts payable	191,000,000	198,000,000
Other accounts payable	259,000,000	339,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	137,000,000	11,000,000
Other accrued taxes	57,000,000	33,000,000
Accrued interest	58,000,000	61,000,000
Accrued vacation pay	53,000,000	53,000,000
Accrued compensation	40,000,000	74,000,000
Other regulatory liabilities, current	36,000,000	37,000,000
Other current liabilities	39,000,000	41,000,000
Total current liabilities	956,000,000	932,000,000
Long-term Debt	6,233,000,000	6,233,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,623,000,000	3,603,000,000
Deferred credits related to income taxes	74,000,000	75,000,000
Accumulated deferred investment tax credits	131,000,000	133,000,000
Employee benefit obligations	193,000,000	195,000,000
Asset retirement obligations	741,000,000	730,000,000
Other cost of removal obligations	843,000,000	828,000,000
Other regulatory liabilities, deferred	255,000,000	259,000,000
Deferred Over Recovered Regulatory Clause Revenues	0	15,000,000
Other deferred credits and liabilities	65,000,000	61,000,000
Total deferred credits and other liabilities	5,925,000,000	5,899,000,000
Total Liabilities	13,114,000,000	13,064,000,000
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	2,273,000,000	2,262,000,000
Retained earnings	2,093,000,000	2,044,000,000
Accumulated other comprehensive loss	(25,000,000)	(26,000,000)
Total common stockholders' equity	5,563,000,000	5,502,000,000
Total Liabilities and Stockholders' Equity	19,362,000,000	19,251,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	18,000,000	30,000,000
Receivables --
Customer accounts receivable	523,000,000	512,000,000
Unbilled revenues	179,000,000	209,000,000
Joint owner accounts receivable	85,000,000	67,000,000
Other accounts and notes receivable	69,000,000	117,000,000
Affiliated companies	21,000,000	21,000,000
Accumulated provision for uncollectible accounts	(5,000,000)	(5,000,000)
Fossil fuel stock, at average cost	486,000,000	742,000,000
Materials and supplies, at average cost	409,000,000	409,000,000
Vacation pay	88,000,000	88,000,000
Prepaid income taxes	103,000,000	97,000,000
Other regulatory assets, current	61,000,000	66,000,000
Other current assets	108,000,000	54,000,000
Total current assets	2,145,000,000	2,407,000,000
Property, Plant, and Equipment:
In service	30,295,000,000	30,132,000,000
Less accumulated provision for depreciation	11,028,000,000	10,970,000,000
Plant in service, net of depreciation	19,267,000,000	19,162,000,000
Other utility plant, net	234,000,000	240,000,000
Nuclear fuel, at amortized cost	532,000,000	523,000,000
Construction work in progress	3,660,000,000	3,500,000,000
Total property, plant, and equipment	23,693,000,000	23,425,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	47,000,000	46,000,000
Nuclear decommissioning trusts, at fair value	786,000,000	751,000,000
Miscellaneous property and investments	43,000,000	44,000,000
Total other property and investments	876,000,000	841,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	710,000,000	718,000,000
Prepaid pension costs	123,000,000	118,000,000
Deferred under recovered regulatory clause revenues	152,000,000	0
Other regulatory assets, deferred	1,207,000,000	1,152,000,000
Other deferred charges and assets	283,000,000	246,000,000
Total deferred charges and other assets	2,475,000,000	2,234,000,000
Total Assets	29,189,000,000	28,907,000,000
Current Liabilities:
Securities due within one year	5,000,000	5,000,000
Notes payable	298,000,000	1,047,000,000
Affiliated accounts payable	440,000,000	417,000,000
Other accounts payable	514,000,000	472,000,000
Customer deposits	249,000,000	246,000,000
Accrued taxes --
Accrued income taxes	30,000,000	0
Other accrued taxes	123,000,000	321,000,000
Accrued interest	98,000,000	91,000,000
Accrued vacation pay	60,000,000	61,000,000
Accrued compensation	51,000,000	80,000,000
Liabilities from risk management activities	10,000,000	13,000,000
Nuclear decommissioning trust securities lending collateral	36,000,000	9,000,000
Other regulatory liabilities, current	22,000,000	17,000,000
Other current liabilities	160,000,000	127,000,000
Total current liabilities	2,096,000,000	2,906,000,000
Long-term Debt	9,632,000,000	8,633,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	5,288,000,000	5,200,000,000
Deferred credits related to income taxes	110,000,000	112,000,000
Accumulated deferred investment tax credits	200,000,000	203,000,000
Employee benefit obligations	541,000,000	542,000,000
Asset retirement obligations	1,196,000,000	1,210,000,000
Other cost of removal obligations	53,000,000	43,000,000
Other deferred credits and liabilities	172,000,000	201,000,000
Total deferred credits and other liabilities	7,560,000,000	7,511,000,000
Total Liabilities	19,288,000,000	19,050,000,000
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	5,651,000,000	5,633,000,000
Retained earnings	3,591,000,000	3,565,000,000
Accumulated other comprehensive loss	(5,000,000)	(5,000,000)
Total common stockholders' equity	9,635,000,000	9,591,000,000
Total Liabilities and Stockholders' Equity	29,189,000,000	28,907,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	23,356,000	21,753,000
Receivables --
Customer accounts receivable	70,386,000	64,884,000
Unbilled revenues	50,447,000	57,282,000
Under recovered regulatory clause revenues	62,169,000	48,282,000
Other accounts and notes receivable	11,421,000	8,620,000
Affiliated companies	18,147,000	8,259,000
Accumulated provision for uncollectible accounts	(995,000)	(1,131,000)
Fossil fuel stock, at average cost	88,783,000	135,050,000
Materials and supplies, at average cost	55,102,000	54,935,000
Prepaid expenses	11,602,000	33,186,000
Other regulatory assets, current	16,722,000	18,536,000
Other current assets	12,206,000	6,120,000
Total current assets	419,346,000	455,776,000
Property, Plant, and Equipment:
In service	4,390,454,000	4,363,664,000
Less accumulated provision for depreciation	1,232,745,000	1,211,336,000
Plant in service, net of depreciation	3,157,709,000	3,152,328,000
Construction work in progress	325,001,000	280,626,000
Total property, plant, and equipment	3,482,710,000	3,432,954,000
Other Property and Investments:
Total other property and investments	15,119,000	15,314,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	52,017,000	50,597,000
Prepaid pension costs	11,569,000	11,533,000
Other regulatory assets, deferred	345,956,000	340,415,000
Other deferred charges and assets	33,006,000	30,982,000
Total deferred charges and other assets	442,548,000	433,527,000
Total Assets	4,359,723,000	4,337,571,000
Current Liabilities:
Securities due within one year	75,000,000	75,000,000
Notes payable	60,489,000	135,878,000
Affiliated accounts payable	88,507,000	76,897,000
Other accounts payable	42,814,000	47,038,000
Customer deposits	34,508,000	34,433,000
Accrued taxes --
Accrued income taxes	5,166,000	45,000
Other accrued taxes	13,031,000	7,486,000
Accrued interest	17,959,000	10,272,000
Accrued compensation	6,856,000	11,657,000
Liabilities from risk management activities	3,804,000	6,470,000
Other regulatory liabilities, current	19,283,000	13,408,000
Other current liabilities	22,537,000	22,972,000
Total current liabilities	389,954,000	441,556,000
Long-term Debt	1,158,305,000	1,158,163,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	743,992,000	734,355,000
Accumulated deferred investment tax credits	3,737,000	4,055,000
Employee benefit obligations	76,549,000	76,338,000
Other cost of removal obligations	225,580,000	228,148,000
Other regulatory liabilities, deferred	54,935,000	56,051,000
Deferred capacity expense	190,795,000	180,149,000
Other deferred credits and liabilities	76,793,000	77,126,000
Total deferred credits and other liabilities	1,372,381,000	1,356,222,000
Total Liabilities	2,920,640,000	2,955,941,000
Preference Stock	146,504,000	146,504,000
Common Stockholders' Equity:
Common stock	483,060,000	433,060,000
Paid-in capital	554,098,000	552,681,000
Retained earnings	256,437,000	250,494,000
Accumulated other comprehensive loss	(1,016,000)	(1,109,000)
Total common stockholders' equity	1,292,579,000	1,235,126,000
Total Liabilities and Stockholders' Equity	4,359,723,000	4,337,571,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	85,182,000	145,165,000
Receivables --
Customer accounts receivable	40,722,000	40,978,000
Unbilled revenues	37,363,000	38,895,000
Under recovered regulatory clause revenues	2,146,000	0
Other accounts and notes receivable	3,853,000	4,600,000
Affiliated companies	48,835,000	34,920,000
Accumulated provision for uncollectible accounts	(2,113,000)	(3,018,000)
Fossil fuel stock, at average cost	76,689,000	113,285,000
Materials and supplies, at average cost	48,317,000	45,347,000
Prepaid income taxes	60,355,000	34,751,000
Other regulatory assets, current	53,416,000	52,496,000
Other current assets	13,525,000	9,357,000
Total current assets	468,290,000	516,776,000
Property, Plant, and Equipment:
In service	3,467,314,000	3,458,770,000
Less accumulated provision for depreciation	1,108,649,000	1,095,352,000
Plant in service, net of depreciation	2,358,665,000	2,363,418,000
Construction work in progress	2,550,361,000	2,586,031,000
Total property, plant, and equipment	4,909,026,000	4,949,449,000
Other Property and Investments:
Total other property and investments	4,909,000	4,857,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	158,788,000	139,834,000
Other regulatory assets, deferred	212,467,000	200,620,000
Accumulated deferred income taxes	34,533,000	0
Other deferred charges and assets	39,899,000	36,673,000
Total deferred charges and other assets	445,687,000	377,127,000
Total Assets	5,827,912,000	5,848,209,000
Current Liabilities:
Securities due within one year	313,821,000	13,789,000
Interest-bearing refundable deposit related to asset sale	225,000,000	150,000,000
Affiliated accounts payable	74,332,000	70,299,000
Other accounts payable	190,538,000	210,191,000
Customer deposits	14,867,000	14,379,000
Accrued taxes --
Accrued income taxes	3,222,000	5,590,000
Other accrued taxes	26,020,000	77,958,000
Accrued interest	55,369,000	47,144,000
Accrued compensation	7,244,000	9,324,000
Other regulatory liabilities, current	38,316,000	24,981,000
Over recovered regulatory clause liabilities	0	18,358,000
Other current liabilities	19,767,000	21,413,000
Total current liabilities	968,496,000	663,426,000
Long-term Debt	2,114,184,000	2,167,067,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	0	72,808,000
Deferred credits related to income taxes	7,873,000	9,145,000
Accumulated deferred investment tax credits	283,959,000	284,248,000
Employee benefit obligations	94,116,000	94,430,000
Asset retirement obligations	41,682,000	41,197,000
Other cost of removal obligations	156,426,000	151,340,000
Other regulatory liabilities, deferred	162,997,000	140,880,000
Other deferred credits and liabilities	14,128,000	14,337,000
Total deferred credits and other liabilities	761,181,000	808,385,000
Total Liabilities	3,843,861,000	3,638,878,000
Redeemable Preferred Stock	32,780,000	32,780,000
Common Stockholders' Equity:
Common stock	37,691,000	37,691,000
Paid-in capital	2,323,151,000	2,376,595,000
Retained earnings	(401,919,000)	(229,871,000)
Accumulated other comprehensive loss	(7,652,000)	(7,864,000)
Total common stockholders' equity	1,951,271,000	2,176,551,000
Total Liabilities and Stockholders' Equity	5,827,912,000	5,848,209,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	129,151,000	68,744,000
Receivables --
Customer accounts receivable	69,757,000	73,497,000
Other accounts and notes receivable	3,901,000	3,983,000
Affiliated companies	21,343,000	38,391,000
Fossil fuel stock, at average cost	16,920,000	19,178,000
Materials and supplies, at average cost	57,542,000	54,780,000
Prepaid service agreements - current	65,321,000	81,206,000
Prepaid income taxes	24,237,000	54,732,000
Prepaid expenses	5,715,000	7,915,000
Assets from risk management activities	231,000	182,000
Total current assets	394,118,000	402,608,000
Property, Plant, and Equipment:
In service	4,705,764,000	4,696,134,000
Less accumulated provision for depreciation	928,641,000	871,963,000
Plant in service, net of depreciation	3,777,123,000	3,824,171,000
Construction work in progress	10,926,000	9,843,000
Total property, plant, and equipment	3,788,049,000	3,834,014,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization of $6,232 and $5,614 at March 31, 2014 and December 31, 2013, respectively	42,887,000	43,505,000
Total other property and investments	44,726,000	45,344,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	96,550,000	73,676,000
Other deferred charges and assets -- affiliated	7,813,000	4,605,000
Other deferred charges and assets	72,564,000	68,853,000
Total deferred charges and other assets	176,927,000	147,134,000
Total Assets	4,403,820,000	4,429,100,000
Current Liabilities:
Securities due within one year	1,412,000	599,000
Affiliated accounts payable	61,270,000	56,661,000
Other accounts payable	20,469,000	20,747,000
Accrued taxes --
Accrued income taxes	2,304,000	161,000
Other accrued taxes	6,350,000	2,662,000
Accrued interest	13,850,000	28,352,000
Deferred capacity revenues — current affiliated	1,536,000	4,229,000
Other current liabilities	12,863,000	14,263,000
Total current liabilities	120,054,000	127,674,000
Long-term Debt	1,618,263,000	1,619,241,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	717,033,000	724,390,000
Deferred convertible investment tax credits	341,702,000	340,269,000
Deferred capacity revenues -- affiliated	5,297,000	15,279,000
Other deferred credits and liabilities — affiliated	1,367,000	1,621,000
Other deferred credits and liabilities	8,211,000	7,896,000
Total deferred credits and other liabilities	1,073,610,000	1,089,455,000
Total Liabilities	2,811,927,000	2,836,370,000
Redeemable Noncontrolling Interest	29,914,000	28,778,000
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	1,026,283,000	1,029,035,000
Retained earnings	532,690,000	531,998,000
Accumulated other comprehensive loss	3,006,000	2,919,000
Total common stockholders' equity	1,561,979,000	1,563,952,000
Total Liabilities and Stockholders' Equity	$ 4,403,820,000	$ 4,429,100,000