Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 710,000,000	$ 659,000,000
Receivables --
Customer accounts receivable	1,090,000,000	1,027,000,000
Unbilled revenues	432,000,000	448,000,000
Under recovered regulatory clause revenues	136,000,000	58,000,000
Other accounts and notes receivable	307,000,000	304,000,000
Accumulated provision for uncollectible accounts	(18,000,000)	(18,000,000)
Fossil fuel stock, at average cost	930,000,000	1,339,000,000
Materials and supplies, at average cost	1,039,000,000	959,000,000
Vacation pay	177,000,000	171,000,000
Deferred income taxes, current	506,000,000	143,000,000
Prepaid expenses	665,000,000	278,000,000
Other regulatory assets, current	346,000,000	207,000,000
Other current assets	50,000,000	39,000,000
Total current assets	6,370,000,000	5,614,000,000
Property, Plant, and Equipment:
In service	70,013,000,000	66,021,000,000
Less accumulated depreciation	24,059,000,000	23,059,000,000
Plant in service, net of depreciation	45,954,000,000	42,962,000,000
Other utility plant, net	211,000,000	240,000,000
Nuclear fuel, at amortized cost	911,000,000	855,000,000
Construction work in progress	7,792,000,000	7,151,000,000
Total property, plant, and equipment	54,868,000,000	51,208,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,546,000,000	1,465,000,000
Leveraged leases	743,000,000	665,000,000
Miscellaneous property and investments	203,000,000	218,000,000
Total other property and investments	2,492,000,000	2,348,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,510,000,000	1,436,000,000
Prepaid pension costs	0	419,000,000
Unamortized debt issuance expense	202,000,000	139,000,000
Unamortized loss on reacquired debt	243,000,000	269,000,000
Other regulatory assets, deferred	4,334,000,000	2,495,000,000
Other deferred charges and assets	904,000,000	618,000,000
Total deferred charges and other assets	7,193,000,000	5,376,000,000
Total Assets	70,923,000,000	64,546,000,000
Current Liabilities:
Securities due within one year	3,333,000,000	469,000,000
Interest-bearing refundable deposit related to asset sale	275,000,000	150,000,000
Notes payable	803,000,000	1,482,000,000
Accounts payable	1,593,000,000	1,376,000,000
Customer deposits	390,000,000	380,000,000
Accrued taxes --
Accrued income taxes	151,000,000	13,000,000
Other accrued taxes	487,000,000	456,000,000
Accrued interest	295,000,000	251,000,000
Accrued vacation pay	223,000,000	217,000,000
Accrued compensation	576,000,000	303,000,000
Other regulatory liabilities, current	26,000,000	82,000,000
Mirror Construction Work In Progress Balance	271,000,000	0
Other current liabilities	544,000,000	346,000,000
Total current liabilities	8,967,000,000	5,525,000,000
Senior notes -
Unamortized debt premium	69,000,000	79,000,000
Unamortized debt discount	(33,000,000)	(30,000,000)
Long-term Debt	20,841,000,000	21,344,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	11,568,000,000	10,563,000,000
Deferred credits related to income taxes	192,000,000	203,000,000
Accumulated deferred investment tax credits	1,208,000,000	966,000,000
Employee benefit obligations	2,432,000,000	1,461,000,000
Asset retirement obligations	2,168,000,000	2,006,000,000
Other cost of removal obligations	1,215,000,000	1,275,000,000
Other regulatory liabilities, deferred	398,000,000	479,000,000
Other deferred credits and liabilities	594,000,000	585,000,000
Total deferred credits and other liabilities	19,775,000,000	17,538,000,000
Total Liabilities	49,583,000,000	44,407,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Redeemable Noncontrolling Interest, Equity, Carrying Amount	39,000,000	0
Common Stockholders' Equity:
Common stock	4,539,000,000	4,461,000,000
Paid-in capital	5,955,000,000	5,362,000,000
Retained earnings	9,609,000,000	9,510,000,000
Accumulated other comprehensive loss	(128,000,000)	(75,000,000)
Total Common Stockholders' Equity	19,949,000,000	19,008,000,000
Stockholders' Equity Attributable to Noncontrolling Interest	977,000,000	756,000,000
Total stockholders' equity	20,926,000,000	19,764,000,000
Total Liabilities and Stockholders' Equity	70,923,000,000	64,546,000,000
Commitments and Contingent Matters
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	273,000,000	295,000,000
Receivables --
Customer accounts receivable	345,000,000	341,000,000
Unbilled revenues	138,000,000	142,000,000
Under recovered regulatory clause revenues	74,000,000	0
Other accounts and notes receivable	23,000,000	30,000,000
Affiliated companies	37,000,000	54,000,000
Accumulated provision for uncollectible accounts	(9,000,000)	(8,000,000)
Fossil fuel stock, at average cost	268,000,000	329,000,000
Materials and supplies, at average cost	406,000,000	375,000,000
Vacation pay	65,000,000	63,000,000
Prepaid expenses	244,000,000	57,000,000
Other regulatory assets, current	84,000,000	54,000,000
Other current assets	5,000,000	6,000,000
Total current assets	1,953,000,000	1,738,000,000
Property, Plant, and Equipment:
In service	23,080,000,000	22,092,000,000
Less accumulated depreciation	8,522,000,000	8,114,000,000
Plant in service, net of depreciation	14,558,000,000	13,978,000,000
Nuclear fuel, at amortized cost	348,000,000	332,000,000
Construction work in progress	1,006,000,000	748,000,000
Total property, plant, and equipment	15,912,000,000	15,058,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	66,000,000	54,000,000
Nuclear decommissioning trusts, at fair value	756,000,000	714,000,000
Miscellaneous property and investments	84,000,000	80,000,000
Total other property and investments	906,000,000	848,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	525,000,000	519,000,000
Prepaid pension costs	0	276,000,000
Deferred under recovered regulatory clause revenues	31,000,000	25,000,000
Other regulatory assets, deferred	1,063,000,000	645,000,000
Other deferred charges and assets	162,000,000	142,000,000
Total deferred charges and other assets	1,781,000,000	1,607,000,000
Total Assets	20,552,000,000	19,251,000,000
Current Liabilities:
Securities due within one year	454,000,000	0
Affiliated	248,000,000	198,000,000
Accounts payable	443,000,000	339,000,000
Customer deposits	87,000,000	85,000,000
Accrued taxes --
Accrued income taxes	2,000,000	11,000,000
Other accrued taxes	37,000,000	33,000,000
Accrued interest	66,000,000	61,000,000
Accrued vacation pay	54,000,000	53,000,000
Accrued compensation	131,000,000	74,000,000
Other regulatory liabilities, current	2,000,000	37,000,000
Other current liabilities	80,000,000	41,000,000
Total current liabilities	1,604,000,000	932,000,000
Senior notes -
Long-term Debt	6,176,000,000	6,233,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,874,000,000	3,603,000,000
Deferred credits related to income taxes	72,000,000	75,000,000
Accumulated deferred investment tax credits	125,000,000	133,000,000
Employee benefit obligations	326,000,000	195,000,000
Asset retirement obligations	829,000,000	730,000,000
Other cost of removal obligations	744,000,000	828,000,000
Other regulatory liabilities, deferred	239,000,000	259,000,000
Deferred over recovered regulatory clause revenues	47,000,000	15,000,000
Other deferred credits and liabilities	79,000,000	61,000,000
Total deferred credits and other liabilities	6,335,000,000	5,899,000,000
Total Liabilities	14,115,000,000	13,064,000,000
Redeemable Preferred Stock of Subsidiaries	342,000,000	342,000,000
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	2,304,000,000	2,262,000,000
Retained earnings	2,255,000,000	2,044,000,000
Accumulated other comprehensive loss	(29,000,000)	(26,000,000)
Total Common Stockholders' Equity	5,752,000,000	5,502,000,000
Total stockholders' equity	5,752,000,000	5,502,000,000
Total Liabilities and Stockholders' Equity	20,552,000,000	19,251,000,000
Commitments and Contingent Matters
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	24,000,000	30,000,000
Receivables --
Customer accounts receivable	553,000,000	512,000,000
Unbilled revenues	201,000,000	209,000,000
Joint owner accounts receivable	121,000,000	67,000,000
Other accounts and notes receivable	61,000,000	117,000,000
Affiliated companies	18,000,000	21,000,000
Accumulated provision for uncollectible accounts	(6,000,000)	(5,000,000)
Fossil fuel stock, at average cost	439,000,000	742,000,000
Materials and supplies, at average cost	438,000,000	409,000,000
Vacation pay	91,000,000	88,000,000
Prepaid income taxes	278,000,000	97,000,000
Other regulatory assets, current	136,000,000	106,000,000
Other current assets	74,000,000	53,000,000
Total current assets	2,428,000,000	2,446,000,000
Property, Plant, and Equipment:
In service	31,083,000,000	30,132,000,000
Less accumulated depreciation	11,222,000,000	10,970,000,000
Plant in service, net of depreciation	19,861,000,000	19,162,000,000
Other utility plant, net	211,000,000	240,000,000
Nuclear fuel, at amortized cost	563,000,000	523,000,000
Construction work in progress	4,031,000,000	3,500,000,000
Total property, plant, and equipment	24,666,000,000	23,425,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	58,000,000	46,000,000
Nuclear decommissioning trusts, at fair value	789,000,000	751,000,000
Miscellaneous property and investments	38,000,000	44,000,000
Total other property and investments	885,000,000	841,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	698,000,000	718,000,000
Prepaid pension costs	0	118,000,000
Deferred under recovered regulatory clause revenues	197,000,000	0
Other regulatory assets, deferred	1,753,000,000	1,113,000,000
Other deferred charges and assets	403,000,000	246,000,000
Total deferred charges and other assets	3,051,000,000	2,195,000,000
Total Assets	31,030,000,000	28,907,000,000
Current Liabilities:
Securities due within one year	1,154,000,000	5,000,000
Notes payable	156,000,000	1,047,000,000
Affiliated	451,000,000	417,000,000
Accounts payable	555,000,000	472,000,000
Customer deposits	253,000,000	246,000,000
Accrued taxes --
Other accrued taxes	332,000,000	321,000,000
Accrued interest	96,000,000	91,000,000
Accrued vacation pay	63,000,000	61,000,000
Accrued compensation	153,000,000	80,000,000
Liabilities from risk management activities	32,000,000	13,000,000
Other regulatory liabilities, current	21,000,000	17,000,000
Over recovered regulatory clause revenues, current	0	14,000,000
Other current liabilities	204,000,000	122,000,000
Total current liabilities	3,470,000,000	2,906,000,000
Senior notes -
Long-term Debt	8,683,000,000	8,633,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	5,507,000,000	5,200,000,000
Deferred credits related to income taxes	106,000,000	112,000,000
Accumulated deferred investment tax credits	196,000,000	203,000,000
Employee benefit obligations	903,000,000	542,000,000
Deferred capacity expense	167,000,000	162,000,000
Asset retirement obligations	1,223,000,000	1,210,000,000
Other cost of removal obligations	46,000,000	43,000,000
Other deferred credits and liabilities	209,000,000	201,000,000
Total deferred credits and other liabilities	8,190,000,000	7,511,000,000
Total Liabilities	20,343,000,000	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	6,196,000,000	5,633,000,000
Retained earnings	3,835,000,000	3,565,000,000
Accumulated other comprehensive loss	(8,000,000)	(5,000,000)
Total Common Stockholders' Equity	10,421,000,000	9,591,000,000
Total stockholders' equity	10,421,000,000	9,591,000,000
Total Liabilities and Stockholders' Equity	31,030,000,000	28,907,000,000
Commitments and Contingent Matters
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	38,614,000	21,753,000
Receivables --
Customer accounts receivable	73,000,000	64,884,000
Unbilled revenues	58,268,000	57,282,000
Under recovered regulatory clause revenues	57,153,000	48,282,000
Other accounts and notes receivable	8,145,000	8,620,000
Affiliated companies	9,867,000	8,259,000
Accumulated provision for uncollectible accounts	(2,087,000)	(1,131,000)
Fossil fuel stock, at average cost	101,447,000	135,050,000
Materials and supplies, at average cost	55,656,000	54,935,000
Prepaid expenses	39,673,000	33,186,000
Other regulatory assets, current	74,242,000	18,536,000
Other current assets	1,711,000	6,120,000
Total current assets	515,689,000	455,776,000
Property, Plant, and Equipment:
In service	4,494,953,000	4,363,664,000
Less accumulated depreciation	1,295,714,000	1,211,336,000
Plant in service, net of depreciation	3,199,239,000	3,152,328,000
Construction work in progress	465,033,000	280,626,000
Total property, plant, and equipment	3,664,272,000	3,432,954,000
Other Property and Investments:
Total other property and investments	15,148,000	15,314,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	55,931,000	50,597,000
Prepaid pension costs	0	11,533,000
Other regulatory assets, deferred	416,028,000	340,415,000
Other deferred charges and assets	41,191,000	30,982,000
Total deferred charges and other assets	513,150,000	433,527,000
Total Assets	4,708,259,000	4,337,571,000
Current Liabilities:
Securities due within one year	0	75,000,000
Notes payable	109,977,000	135,878,000
Affiliated	87,397,000	76,897,000
Accounts payable	55,848,000	47,038,000
Customer deposits	35,094,000	34,433,000
Accrued taxes --
Accrued income taxes	46,000	45,000
Other accrued taxes	9,201,000	7,486,000
Accrued interest	10,686,000	10,272,000
Accrued compensation	22,894,000	11,657,000
Deferred Capacity Expense, Other	21,988,000	0
Liabilities from risk management activities	36,934,000	6,470,000
Other regulatory liabilities, current	566,000	13,408,000
Other current liabilities	22,386,000	22,972,000
Total current liabilities	413,017,000	441,556,000
Senior notes -
Long-term Debt	1,369,594,000	1,158,163,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	799,723,000	734,355,000
Accumulated deferred investment tax credits	2,783,000	4,055,000
Employee benefit obligations	120,752,000	76,338,000
Deferred capacity expense	163,077,000	180,149,000
Other cost of removal obligations	234,587,000	228,148,000
Other regulatory liabilities, deferred	48,556,000	56,051,000
Other deferred credits and liabilities	100,076,000	77,126,000
Total deferred credits and other liabilities	1,469,554,000	1,356,222,000
Total Liabilities	3,252,165,000	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	559,797,000	552,681,000
Retained earnings	267,470,000	250,494,000
Accumulated other comprehensive loss	(737,000)	(1,109,000)
Total Common Stockholders' Equity	1,309,590,000	1,235,126,000
Total stockholders' equity	1,309,590,000	1,235,126,000
Total Liabilities and Stockholders' Equity	4,708,259,000	4,337,571,000
Commitments and Contingent Matters
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	132,501,000	145,165,000
Receivables --
Customer accounts receivable	40,648,000	40,978,000
Unbilled revenues	35,494,000	38,895,000
Under recovered regulatory clause revenues	2,471,000	0
Other accounts and notes receivable	11,256,000	4,600,000
Affiliated companies	51,060,000	34,920,000
Accumulated provision for uncollectible accounts	(825,000)	(3,018,000)
Fossil fuel stock, at average cost	100,164,000	113,285,000
Materials and supplies, at average cost	61,582,000	45,347,000
Prepaid income taxes	190,631,000	34,751,000
Other regulatory assets, current	72,840,000	48,583,000
Other current assets	6,209,000	9,357,000
Total current assets	704,031,000	512,863,000
Property, Plant, and Equipment:
In service	4,378,087,000	3,458,770,000
Less accumulated depreciation	1,172,715,000	1,095,352,000
Plant in service, net of depreciation	3,205,372,000	2,363,418,000
Construction work in progress	2,160,646,000	2,586,031,000
Total property, plant, and equipment	5,366,018,000	4,949,449,000
Other Property and Investments:
Total other property and investments	5,498,000	4,857,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	225,507,000	143,747,000
Other regulatory assets, deferred	385,410,000	200,620,000
Deferred Tax Assets, Net, Noncurrent	17,388,000	0
Other deferred charges and assets	52,876,000	36,673,000
Total deferred charges and other assets	681,181,000	381,040,000
Total Assets	6,756,728,000	5,848,209,000
Current Liabilities:
Securities due within one year	777,667,000	13,789,000
Interest-bearing refundable deposit related to asset sale	275,000,000	150,000,000
Affiliated	85,882,000	70,299,000
Accounts payable	177,736,000	210,191,000
Customer deposits	14,970,000	14,379,000
Accrued taxes --
Accrued income taxes	142,461,000	5,590,000
Other accrued taxes	83,686,000	77,958,000
Accrued interest	76,494,000	47,144,000
Accrued compensation	26,331,000	9,324,000
Other regulatory liabilities, current	2,164,000	14,480,000
Mirror Construction Work In Progress Balance	270,779,000	0
Over recovered regulatory clause liabilities	532,000	18,358,000
Other current liabilities	44,701,000	21,413,000
Total current liabilities	1,978,403,000	652,925,000
Senior notes -
Unamortized debt premium	62,701,000	71,807,000
Unamortized debt discount	(1,921,000)	(2,113,000)
Long-term Debt	1,630,487,000	2,167,067,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	284,849,000	72,808,000
Deferred credits related to income taxes	9,370,000	10,191,000
Accumulated deferred investment tax credits	282,816,000	284,248,000
Employee benefit obligations	147,536,000	94,430,000
Asset retirement obligations	48,248,000	41,197,000
Other cost of removal obligations	165,999,000	156,683,000
Other regulatory liabilities, deferred	63,681,000	144,992,000
Other deferred credits and liabilities	28,299,000	14,337,000
Total deferred credits and other liabilities	1,030,798,000	818,886,000
Total Liabilities	4,639,688,000	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	2,612,136,000	2,376,595,000
Retained earnings	(558,552,000)	(229,871,000)
Accumulated other comprehensive loss	(7,015,000)	(7,864,000)
Total Common Stockholders' Equity	2,084,260,000	2,176,551,000
Total stockholders' equity	2,084,260,000	2,176,551,000
Total Liabilities and Stockholders' Equity	6,756,728,000	5,848,209,000
Commitments and Contingent Matters
Southern Power [Member]
Current Assets:
Cash and cash equivalents	74,606,000	68,744,000
Receivables --
Customer accounts receivable	76,608,000	73,497,000
Other accounts and notes receivable	14,707,000	3,983,000
Affiliated companies	34,223,000	38,391,000
Fossil fuel stock, at average cost	21,755,000	19,178,000
Materials and supplies, at average cost	57,843,000	54,780,000
Prepaid income taxes	19,239,000	54,523,000
Deferred income taxes, current	305,814,000	209,000
Prepaid expenses	17,301,000	20,946,000
Assets from risk management activities	5,297,000	182,000
Total current assets	627,393,000	334,433,000
Property, Plant, and Equipment:
In service	5,656,974,000	4,696,134,000
Less accumulated depreciation	1,034,610,000	871,963,000
Plant in service, net of depreciation	4,622,364,000	3,824,171,000
Construction work in progress	10,511,000	9,843,000
Total property, plant, and equipment	4,632,875,000	3,834,014,000
Other Property and Investments:
Goodwill	1,839,000	1,839,000
Other intangible assets, net of amortization	47,091,000	43,505,000
Total other property and investments	48,930,000	45,344,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	123,573,000	141,851,000
Other deferred charges and assets -- affiliated	5,492,000	4,605,000
Other deferred charges and assets	111,239,000	68,853,000
Total deferred charges and other assets	240,304,000	215,309,000
Total Assets	5,549,502,000	4,429,100,000
Current Liabilities:
Securities due within one year	525,295,000	599,000
Notes payable	194,917,000	0
Affiliated	78,279,000	56,661,000
Accounts payable	30,037,000	20,747,000
Accrued taxes --
Accrued income taxes	71,700,000	161,000
Other accrued taxes	2,983,000	2,662,000
Accrued interest	29,518,000	28,352,000
Other current liabilities	14,761,000	18,492,000
Total current liabilities	947,490,000	127,674,000
Senior notes -
Unamortized debt premium	2,378,000	2,467,000
Unamortized debt discount	(813,000)	(1,013,000)
Long-term Debt	1,095,340,000	1,619,241,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	862,795,000	724,390,000
Deferred convertible investment tax credits	600,519,000	340,269,000
Deferred capacity revenues -- affiliated	15,279,000	15,279,000
Other deferred credits and liabilities -- affiliated	604,000	1,621,000
Other deferred credits and liabilities	16,890,000	7,896,000
Total deferred credits and other liabilities	1,496,087,000	1,089,455,000
Total Liabilities	3,538,917,000	2,836,370,000
Redeemable Noncontrolling Interest	39,241,000	28,778,000
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	1,175,392,000	1,029,035,000
Retained earnings	573,178,000	531,998,000
Accumulated other comprehensive loss	3,286,000	2,919,000
Total Common Stockholders' Equity	1,751,856,000	1,563,952,000
Stockholders' Equity Attributable to Noncontrolling Interest	219,488,000	0
Total stockholders' equity	1,971,344,000	1,563,952,000
Total Liabilities and Stockholders' Equity	5,549,502,000	4,429,100,000
Commitments and Contingent Matters
Southern Power [Member] | 4.875% due 2015
Senior notes -
Senior notes	0	525,000,000
Southern Power [Member] | 6.375% due 2036
Senior notes -
Senior notes	200,000,000	200,000,000
Southern Power [Member] | 5.15% due 2041
Senior notes -
Senior notes	575,000,000	575,000,000
Southern Power [Member] | 5.25% due 2043
Senior notes -
Senior notes	300,000,000	300,000,000
Southern Power [Member] | 3.25% due 2032-2034
Senior notes -
Other long-term notes (3.25% due 2032-2034)	$ 18,775,000	$ 17,787,000