Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Deferred Charges and Other Assets:
Total Assets	$ 66,400,000,000	$ 64,546,000,000
Common Stockholders' Equity:
Total Stockholders' Equity	20,182,000,000	19,764,000,000
Southern Company [Member]
Current Assets:
Cash and cash equivalents	583,000,000	659,000,000
Receivables --
Customer accounts receivable	1,237,000,000	1,027,000,000
Unbilled revenues	532,000,000	448,000,000
Under recovered regulatory clause revenues	86,000,000	58,000,000
Other accounts and notes receivable	281,000,000	304,000,000
Accumulated provision for uncollectible accounts	(17,000,000)	(18,000,000)
Fossil fuel stock, at average cost	920,000,000	1,339,000,000
Materials and supplies, at average cost	981,000,000	959,000,000
Vacation pay	171,000,000	171,000,000
Prepaid expenses	422,000,000	489,000,000
Other regulatory assets, current	117,000,000	124,000,000
Other current assets	63,000,000	39,000,000
Total current assets	5,376,000,000	5,599,000,000
Property, Plant, and Equipment:
In service	67,235,000,000	66,021,000,000
Less accumulated provision for depreciation	23,492,000,000	23,059,000,000
Plant in service, net of depreciation	43,743,000,000	42,962,000,000
Other utility plant, net	226,000,000	240,000,000
Nuclear fuel, at amortized cost	868,000,000	855,000,000
Construction work in progress	7,927,000,000	7,151,000,000
Total property, plant, and equipment	52,764,000,000	51,208,000,000
Other Property and Investments:
Nuclear decommissioning trusts, at fair value	1,531,000,000	1,465,000,000
Leveraged leases	675,000,000	665,000,000
Miscellaneous property and investments	230,000,000	218,000,000
Total other property and investments	2,436,000,000	2,348,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,467,000,000	1,432,000,000
Prepaid pension costs	431,000,000	419,000,000
Unamortized debt issuance expense	200,000,000	139,000,000
Unamortized loss on reacquired debt	281,000,000	293,000,000
Other regulatory assets, deferred	2,642,000,000	2,557,000,000
Other deferred charges and assets	803,000,000	551,000,000
Total deferred charges and other assets	5,824,000,000	5,391,000,000
Total Assets	66,400,000,000	64,546,000,000
Current Liabilities:
Securities due within one year	585,000,000	469,000,000
Interest-bearing refundable deposit related to asset sale	225,000,000	150,000,000
Notes payable	1,817,000,000	1,482,000,000
Accounts Payable and Accrued Liabilities, Current [Abstract]
Other accounts payable	1,320,000,000	1,376,000,000
Customer deposits	386,000,000	380,000,000
Accrued taxes --
Accrued income taxes	58,000,000	13,000,000
Other accrued taxes	391,000,000	456,000,000
Accrued interest	268,000,000	251,000,000
Accrued vacation pay	213,000,000	217,000,000
Accrued compensation	282,000,000	303,000,000
Other regulatory liabilities, current	92,000,000	92,000,000
Other current liabilities	337,000,000	347,000,000
Total current liabilities	5,974,000,000	5,536,000,000
Long-term Debt	22,121,000,000	21,344,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	10,644,000,000	10,563,000,000
Deferred credits related to income taxes	194,000,000	202,000,000
Accumulated deferred investment tax credits	1,014,000,000	966,000,000
Employee benefit obligations	1,428,000,000	1,461,000,000
Asset retirement obligations	2,026,000,000	2,006,000,000
Other cost of removal obligations	1,332,000,000	1,270,000,000
Other regulatory liabilities, deferred	537,000,000	475,000,000
Other deferred credits and liabilities	573,000,000	584,000,000
Total deferred credits and other liabilities	17,748,000,000	17,527,000,000
Total Liabilities	45,843,000,000	44,407,000,000
Redeemable Preferred Stock of Subsidiaries	375,000,000	375,000,000
Common Stockholders' Equity:
Common stock	4,480,000,000	4,461,000,000
Paid-in capital	5,499,000,000	5,362,000,000
Treasury, at cost	(35,000,000)	(250,000,000)
Retained earnings	9,553,000,000	9,510,000,000
Accumulated other comprehensive loss	(71,000,000)	(75,000,000)
Total common stockholders' equity	19,426,000,000	19,008,000,000
Preferred and Preference Stock of Subsidiaries	756,000,000	756,000,000
Total Stockholders' Equity	20,182,000,000	19,764,000,000
Total Liabilities and Stockholders' Equity	66,400,000,000	64,546,000,000
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	105,000,000	295,000,000
Receivables --
Customer accounts receivable	391,000,000	341,000,000
Unbilled revenues	156,000,000	142,000,000
Other accounts and notes receivable	39,000,000	30,000,000
Affiliated companies	62,000,000	54,000,000
Accumulated provision for uncollectible accounts	(9,000,000)	(8,000,000)
Fossil fuel stock, at average cost	235,000,000	329,000,000
Materials and supplies, at average cost	377,000,000	375,000,000
Vacation pay	63,000,000	63,000,000
Prepaid expenses	119,000,000	57,000,000
Other regulatory assets, current	4,000,000	7,000,000
Other current assets	16,000,000	6,000,000
Total current assets	1,558,000,000	1,691,000,000
Property, Plant, and Equipment:
In service	22,533,000,000	22,092,000,000
Less accumulated provision for depreciation	8,315,000,000	8,114,000,000
Plant in service, net of depreciation	14,218,000,000	13,978,000,000
Nuclear fuel, at amortized cost	348,000,000	332,000,000
Construction work in progress	808,000,000	748,000,000
Total property, plant, and equipment	15,374,000,000	15,058,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	57,000,000	54,000,000
Nuclear decommissioning trusts, at fair value	749,000,000	714,000,000
Miscellaneous property and investments	82,000,000	80,000,000
Total other property and investments	888,000,000	848,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	525,000,000	519,000,000
Prepaid pension costs	284,000,000	276,000,000
Deferred under recovered regulatory clause revenues	65,000,000	25,000,000
Other regulatory assets, deferred	702,000,000	692,000,000
Other deferred charges and assets	134,000,000	142,000,000
Total deferred charges and other assets	1,710,000,000	1,654,000,000
Total Assets	19,530,000,000	19,251,000,000
Current Liabilities:
Securities due within one year	54,000,000	0
Notes payable	27,000,000	0
Accounts Payable and Accrued Liabilities, Current [Abstract]
Affiliated accounts payable	193,000,000	198,000,000
Other accounts payable	327,000,000	339,000,000
Customer deposits	86,000,000	85,000,000
Accrued taxes --
Accrued income taxes	67,000,000	11,000,000
Other accrued taxes	85,000,000	33,000,000
Accrued interest	64,000,000	61,000,000
Accrued vacation pay	53,000,000	53,000,000
Accrued compensation	62,000,000	74,000,000
Other regulatory liabilities, current	33,000,000	37,000,000
Other current liabilities	40,000,000	41,000,000
Total current liabilities	1,091,000,000	932,000,000
Long-term Debt	6,180,000,000	6,233,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,646,000,000	3,603,000,000
Deferred credits related to income taxes	73,000,000	75,000,000
Accumulated deferred investment tax credits	129,000,000	133,000,000
Employee benefit obligations	186,000,000	195,000,000
Asset retirement obligations	751,000,000	730,000,000
Other cost of removal obligations	856,000,000	828,000,000
Other regulatory liabilities, deferred	260,000,000	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	5,966,000,000	5,899,000,000
Total Liabilities	13,237,000,000	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	2,281,000,000	2,262,000,000
Retained earnings	2,130,000,000	2,044,000,000
Accumulated other comprehensive loss	(25,000,000)	(26,000,000)
Total common stockholders' equity	5,608,000,000	5,502,000,000
Total Liabilities and Stockholders' Equity	19,530,000,000	19,251,000,000
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	46,000,000	30,000,000
Receivables --
Customer accounts receivable	609,000,000	512,000,000
Unbilled revenues	260,000,000	209,000,000
Joint owner accounts receivable	76,000,000	67,000,000
Other accounts and notes receivable	75,000,000	117,000,000
Affiliated companies	19,000,000	21,000,000
Accumulated provision for uncollectible accounts	(6,000,000)	(5,000,000)
Fossil fuel stock, at average cost	487,000,000	742,000,000
Materials and supplies, at average cost	417,000,000	409,000,000
Vacation pay	88,000,000	88,000,000
Prepaid income taxes	85,000,000	97,000,000
Other regulatory assets, current	61,000,000	66,000,000
Other current assets	82,000,000	54,000,000
Total current assets	2,299,000,000	2,407,000,000
Property, Plant, and Equipment:
In service	30,545,000,000	30,132,000,000
Less accumulated provision for depreciation	11,056,000,000	10,970,000,000
Plant in service, net of depreciation	19,489,000,000	19,162,000,000
Other utility plant, net	226,000,000	240,000,000
Nuclear fuel, at amortized cost	519,000,000	523,000,000
Construction work in progress	3,737,000,000	3,500,000,000
Total property, plant, and equipment	23,971,000,000	23,425,000,000
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	49,000,000	46,000,000
Nuclear decommissioning trusts, at fair value	782,000,000	751,000,000
Miscellaneous property and investments	43,000,000	44,000,000
Total other property and investments	874,000,000	841,000,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	705,000,000	718,000,000
Prepaid pension costs	128,000,000	118,000,000
Deferred under recovered regulatory clause revenues	244,000,000	0
Other regulatory assets, deferred	1,164,000,000	1,152,000,000
Other deferred charges and assets	284,000,000	246,000,000
Total deferred charges and other assets	2,525,000,000	2,234,000,000
Total Assets	29,669,000,000	28,907,000,000
Current Liabilities:
Securities due within one year	5,000,000	5,000,000
Notes payable	689,000,000	1,047,000,000
Accounts Payable and Accrued Liabilities, Current [Abstract]
Affiliated accounts payable	444,000,000	417,000,000
Other accounts payable	437,000,000	472,000,000
Customer deposits	251,000,000	246,000,000
Accrued taxes --
Accrued income taxes	38,000,000	0
Other accrued taxes	215,000,000	321,000,000
Accrued interest	96,000,000	91,000,000
Accrued vacation pay	60,000,000	61,000,000
Accrued compensation	75,000,000	80,000,000
Liabilities from risk management activities	11,000,000	13,000,000
Nuclear decommissioning trust securities lending collateral	14,000,000	9,000,000
Other regulatory liabilities, current	21,000,000	17,000,000
Other current liabilities	148,000,000	127,000,000
Total current liabilities	2,504,000,000	2,906,000,000
Long-term Debt	9,594,000,000	8,633,000,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	5,297,000,000	5,200,000,000
Deferred credits related to income taxes	109,000,000	112,000,000
Accumulated deferred investment tax credits	198,000,000	203,000,000
Employee benefit obligations	539,000,000	542,000,000
Asset retirement obligations	1,205,000,000	1,210,000,000
Other cost of removal obligations	64,000,000	43,000,000
Other deferred credits and liabilities	171,000,000	201,000,000
Total deferred credits and other liabilities	7,583,000,000	7,511,000,000
Total Liabilities	19,681,000,000	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	5,665,000,000	5,633,000,000
Retained earnings	3,663,000,000	3,565,000,000
Accumulated other comprehensive loss	(4,000,000)	(5,000,000)
Total common stockholders' equity	9,722,000,000	9,591,000,000
Total Liabilities and Stockholders' Equity	29,669,000,000	28,907,000,000
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	29,700,000	21,753,000
Receivables --
Customer accounts receivable	83,332,000	64,884,000
Unbilled revenues	72,613,000	57,282,000
Under recovered regulatory clause revenues	66,343,000	48,282,000
Other accounts and notes receivable	11,814,000	8,620,000
Affiliated companies	10,600,000	8,259,000
Accumulated provision for uncollectible accounts	(1,295,000)	(1,131,000)
Fossil fuel stock, at average cost	95,864,000	135,050,000
Materials and supplies, at average cost	53,766,000	54,935,000
Prepaid expenses	9,890,000	33,186,000
Other regulatory assets, current	16,567,000	18,536,000
Other current assets	9,680,000	6,120,000
Total current assets	458,874,000	455,776,000
Property, Plant, and Equipment:
In service	4,434,802,000	4,363,664,000
Less accumulated provision for depreciation	1,252,856,000	1,211,336,000
Plant in service, net of depreciation	3,181,946,000	3,152,328,000
Construction work in progress	352,194,000	280,626,000
Total property, plant, and equipment	3,534,140,000	3,432,954,000
Other Property and Investments:
Total other property and investments	15,169,000	15,314,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	53,436,000	50,597,000
Prepaid pension costs	11,604,000	11,533,000
Other regulatory assets, deferred	347,665,000	340,415,000
Other deferred charges and assets	41,492,000	30,982,000
Total deferred charges and other assets	454,197,000	433,527,000
Total Assets	4,462,380,000	4,337,571,000
Current Liabilities:
Securities due within one year	75,000,000	75,000,000
Notes payable	138,580,000	135,878,000
Accounts Payable and Accrued Liabilities, Current [Abstract]
Affiliated accounts payable	78,005,000	76,897,000
Other accounts payable	46,166,000	47,038,000
Customer deposits	34,849,000	34,433,000
Accrued taxes --
Accrued income taxes	45,000	45,000
Other accrued taxes	21,525,000	7,486,000
Accrued interest	8,490,000	10,272,000
Accrued compensation	11,549,000	11,657,000
Liabilities from risk management activities	3,707,000	6,470,000
Other regulatory liabilities, current	17,709,000	13,408,000
Other current liabilities	21,173,000	22,972,000
Total current liabilities	456,798,000	441,556,000
Long-term Debt	1,171,446,000	1,158,163,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	751,131,000	734,355,000
Accumulated deferred investment tax credits	3,419,000	4,055,000
Employee benefit obligations	76,504,000	76,338,000
Other cost of removal obligations	230,344,000	228,148,000
Other regulatory liabilities, deferred	57,117,000	56,051,000
Deferred capacity expense	196,059,000	180,149,000
Other deferred credits and liabilities	74,590,000	77,126,000
Total deferred credits and other liabilities	1,389,164,000	1,356,222,000
Total Liabilities	3,017,408,000	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	556,596,000	552,681,000
Retained earnings	259,735,000	250,494,000
Accumulated other comprehensive loss	(923,000)	(1,109,000)
Total common stockholders' equity	1,298,468,000	1,235,126,000
Total Liabilities and Stockholders' Equity	4,462,380,000	4,337,571,000
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	245,891,000	145,165,000
Receivables --
Customer accounts receivable	43,988,000	40,978,000
Unbilled revenues	43,271,000	38,895,000
Under recovered regulatory clause revenues	19,842,000	0
Other accounts and notes receivable	2,646,000	4,600,000
Affiliated companies	41,460,000	34,920,000
Accumulated provision for uncollectible accounts	(1,193,000)	(3,018,000)
Fossil fuel stock, at average cost	81,578,000	113,285,000
Materials and supplies, at average cost	50,954,000	45,347,000
Prepaid income taxes	14,989,000	34,751,000
Other regulatory assets, current	54,629,000	52,496,000
Other current assets	9,492,000	9,357,000
Total current assets	607,547,000	516,776,000
Property, Plant, and Equipment:
In service	3,492,473,000	3,458,770,000
Less accumulated provision for depreciation	1,128,231,000	1,095,352,000
Plant in service, net of depreciation	2,364,242,000	2,363,418,000
Construction work in progress	2,925,736,000	2,586,031,000
Total property, plant, and equipment	5,289,978,000	4,949,449,000
Other Property and Investments:
Total other property and investments	5,026,000	4,857,000
Deferred Charges and Other Assets:
Deferred charges related to income taxes	177,865,000	139,834,000
Other regulatory assets, deferred	220,994,000	200,620,000
Accumulated deferred income taxes	16,025,000	0
Other deferred charges and assets	47,548,000	36,673,000
Total deferred charges and other assets	462,432,000	377,127,000
Total Assets	6,364,983,000	5,848,209,000
Current Liabilities:
Securities due within one year	426,170,000	13,789,000
Interest-bearing refundable deposit related to asset sale	225,000,000	150,000,000
Accounts Payable and Accrued Liabilities, Current [Abstract]
Affiliated accounts payable	80,445,000	70,299,000
Other accounts payable	176,142,000	210,191,000
Customer deposits	14,980,000	14,379,000
Accrued taxes --
Accrued income taxes	16,732,000	5,590,000
Other accrued taxes	45,135,000	77,958,000
Accrued interest	60,386,000	47,144,000
Accrued compensation	12,958,000	9,324,000
Other regulatory liabilities, current	19,937,000	24,981,000
Over recovered regulatory clause liabilities	0	18,358,000
Other current liabilities	19,612,000	21,413,000
Total current liabilities	1,097,497,000	663,426,000
Long-term debt, affiliated	220,000,000	0
Long-term debt, non-affiliated	2,011,293,000	2,167,067,000
Long-term Debt	2,231,293,000	2,167,067,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	19,157,000	72,808,000
Deferred credits related to income taxes	7,553,000	9,145,000
Accumulated deferred investment tax credits	283,671,000	284,248,000
Employee benefit obligations	94,164,000	94,430,000
Asset retirement obligations	42,169,000	41,197,000
Other cost of removal obligations	160,277,000	151,340,000
Other regulatory liabilities, deferred	213,827,000	140,880,000
Other deferred credits and liabilities	12,203,000	14,337,000
Total deferred credits and other liabilities	833,021,000	808,385,000
Total Liabilities	4,161,811,000	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	2,479,564,000	2,376,595,000
Retained earnings	(339,424,000)	(229,871,000)
Accumulated other comprehensive loss	(7,439,000)	(7,864,000)
Total common stockholders' equity	2,170,392,000	2,176,551,000
Total Liabilities and Stockholders' Equity	6,364,983,000	5,848,209,000
Southern Power [Member]
Current Assets:
Cash and cash equivalents	23,616,000	68,744,000
Receivables --
Customer accounts receivable	106,162,000	73,497,000
Other accounts and notes receivable	8,041,000	3,983,000
Affiliated companies	36,257,000	38,391,000
Fossil fuel stock, at average cost	20,414,000	19,178,000
Materials and supplies, at average cost	57,906,000	54,780,000
Prepaid service agreements - current	29,676,000	81,206,000
Prepaid income taxes	77,488,000	54,732,000
Prepaid expenses	5,769,000	7,915,000
Assets from risk management activities	289,000	182,000
Total current assets	365,618,000	402,608,000
Property, Plant, and Equipment:
In service	4,942,635,000	4,696,134,000
Less accumulated provision for depreciation	922,461,000	871,963,000
Plant in service, net of depreciation	4,020,174,000	3,824,171,000
Construction work in progress	10,237,000	9,843,000
Total property, plant, and equipment	4,030,411,000	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	42,269,000	43,505,000
Total other property and investments	44,108,000	45,344,000
Deferred Charges and Other Assets:
Prepaid long-term service agreements	69,326,000	73,676,000
Other deferred charges and assets -- affiliated	7,767,000	4,605,000
Other deferred charges and assets	87,814,000	68,853,000
Total deferred charges and other assets	164,907,000	147,134,000
Total Assets	4,605,044,000	4,429,100,000
Current Liabilities:
Securities due within one year	2,082,000	599,000
Notes payable	73,482,000	0
Accounts Payable and Accrued Liabilities, Current [Abstract]
Affiliated accounts payable	80,052,000	56,661,000
Other accounts payable	18,031,000	20,747,000
Accrued taxes --
Accrued income taxes	1,585,000	161,000
Other accrued taxes	10,052,000	2,662,000
Accrued interest	28,446,000	28,352,000
Other current liabilities	22,786,000	18,492,000
Total current liabilities	236,516,000	127,674,000
Long-term Debt	1,626,908,000	1,619,241,000
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	727,923,000	724,390,000
Deferred convertible investment tax credits	398,397,000	340,269,000
Deferred capacity revenues -- affiliated	6,629,000	15,279,000
Other deferred credits and liabilities — affiliated	1,113,000	1,621,000
Other deferred credits and liabilities	10,261,000	7,896,000
Total deferred credits and other liabilities	1,144,323,000	1,089,455,000
Total Liabilities	3,007,747,000	2,836,370,000
Redeemable Noncontrolling Interest	37,841,000	28,778,000
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	1,025,618,000	1,029,035,000
Retained earnings	530,722,000	531,998,000
Accumulated other comprehensive loss	3,116,000	2,919,000
Total common stockholders' equity	1,559,456,000	1,563,952,000
Total Liabilities and Stockholders' Equity	$ 4,605,044,000	$ 4,429,100,000