Condensed Consolidated Statements of Income (Unaudited) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating Revenues:
Retail revenues	$ 3,597,000,000	$ 3,842,000,000	$ 6,689,000,000	$ 7,238,000,000
Wholesale revenues	415,000,000	507,000,000	764,000,000	956,000,000
Other electric revenues	154,000,000	154,000,000	302,000,000	303,000,000
Other revenues	15,000,000	18,000,000	30,000,000	36,000,000
Total operating revenues	4,181,000,000	4,521,000,000	7,785,000,000	8,533,000,000
Operating Expenses:
Fuel	1,290,000,000	1,673,000,000	2,354,000,000	3,149,000,000
Purchased power	150,000,000	145,000,000	291,000,000	245,000,000
Other operations and maintenance	944,000,000	910,000,000	1,911,000,000	1,854,000,000
MC Asset Recovery insurance settlement	(19,000,000)		(19,000,000)
Depreciation and amortization	445,000,000	430,000,000	886,000,000	848,000,000
Taxes other than income taxes	228,000,000	227,000,000	453,000,000	447,000,000
Total operating expenses	3,038,000,000	3,385,000,000	5,876,000,000	6,543,000,000
Operating Income	1,143,000,000	1,136,000,000	1,909,000,000	1,990,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	32,000,000	36,000,000	63,000,000	71,000,000
Interest expense, net of amounts capitalized	(220,000,000)	(199,000,000)	(431,000,000)	(421,000,000)
Other income (expense), net	13,000,000	(4,000,000)	11,000,000	(2,000,000)
Total other income and (expense)	(175,000,000)	(167,000,000)	(357,000,000)	(352,000,000)
Earnings Before Income Taxes	968,000,000	969,000,000	1,552,000,000	1,638,000,000
Income taxes	329,000,000	349,000,000	529,000,000	580,000,000
Consolidated Net Income	639,000,000	620,000,000	1,023,000,000	1,058,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	16,000,000	16,000,000	32,000,000	32,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	623,000,000	604,000,000	991,000,000	1,026,000,000
Earnings per share (EPS) -
Basic EPS	$ 0.71	$ 0.71	$ 1.14	$ 1.20
Diluted EPS	$ 0.71	$ 0.70	$ 1.13	$ 1.20
Average number of shares of common stock outstanding (in millions)
Basic	872	855	870	851
Diluted	880	862	879	858
Cash dividends paid per share of common stock	$ 0.4900	$ 0.4725	$ 0.9625	$ 0.9275
Alabama Power [Member]
Operating Revenues:
Retail revenues	1,254,000,000	1,244,000,000	2,346,000,000	2,370,000,000
Wholesale revenues, non-affiliates	70,000,000	70,000,000	131,000,000	138,000,000
Wholesale revenues, affiliates	6,000,000	75,000,000	20,000,000	150,000,000
Other revenues	47,000,000	51,000,000	96,000,000	102,000,000
Total operating revenues	1,377,000,000	1,440,000,000	2,593,000,000	2,760,000,000
Operating Expenses:
Fuel	343,000,000	428,000,000	649,000,000	823,000,000
Purchased power, non-affiliates	17,000,000	17,000,000	32,000,000	28,000,000
Purchased power, affiliates	66,000,000	57,000,000	106,000,000	103,000,000
Other operations and maintenance	316,000,000	290,000,000	637,000,000	587,000,000
Depreciation and amortization	160,000,000	159,000,000	317,000,000	316,000,000
Taxes other than income taxes	85,000,000	85,000,000	171,000,000	170,000,000
Total operating expenses	987,000,000	1,036,000,000	1,912,000,000	2,027,000,000
Operating Income	390,000,000	404,000,000	681,000,000	733,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	4,000,000	6,000,000	9,000,000	11,000,000
Interest income	4,000,000	5,000,000	8,000,000	9,000,000
Interest expense, net of amounts capitalized	(73,000,000)	(77,000,000)	(146,000,000)	(151,000,000)
Other income (expense), net	(4,000,000)	(7,000,000)	(11,000,000)	(13,000,000)
Total other income and (expense)	(69,000,000)	(73,000,000)	(140,000,000)	(144,000,000)
Earnings Before Income Taxes	321,000,000	331,000,000	541,000,000	589,000,000
Income taxes	126,000,000	131,000,000	210,000,000	227,000,000
Consolidated Net Income	195,000,000	200,000,000	331,000,000	362,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	10,000,000	10,000,000	20,000,000	20,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	185,000,000	190,000,000	311,000,000	342,000,000
Georgia Power [Member]
Operating Revenues:
Retail revenues	1,857,000,000	2,070,000,000	3,451,000,000	3,885,000,000
Wholesale revenues, non-affiliates	75,000,000	97,000,000	141,000,000	180,000,000
Wholesale revenues, affiliates	6,000,000	16,000,000	9,000,000	27,000,000
Other revenues	82,000,000	82,000,000	164,000,000	162,000,000
Total operating revenues	2,020,000,000	2,265,000,000	3,765,000,000	4,254,000,000
Operating Expenses:
Fuel	572,000,000	784,000,000	1,012,000,000	1,461,000,000
Purchased power, non-affiliates	94,000,000	96,000,000	187,000,000	170,000,000
Purchased power, affiliates	129,000,000	157,000,000	288,000,000	320,000,000
Other operations and maintenance	411,000,000	419,000,000	845,000,000	841,000,000
Depreciation and amortization	185,000,000	178,000,000	373,000,000	351,000,000
Taxes other than income taxes	94,000,000	94,000,000	181,000,000	181,000,000
Total operating expenses	1,485,000,000	1,728,000,000	2,886,000,000	3,324,000,000
Operating Income	535,000,000	537,000,000	879,000,000	930,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	13,000,000	22,000,000	26,000,000	47,000,000
Interest expense, net of amounts capitalized	(90,000,000)	(71,000,000)	(181,000,000)	(167,000,000)
Other income (expense), net	(6,000,000)	(5,000,000)	(9,000,000)	(6,000,000)
Total other income and (expense)	(83,000,000)	(54,000,000)	(164,000,000)	(126,000,000)
Earnings Before Income Taxes	452,000,000	483,000,000	715,000,000	804,000,000
Income taxes	152,000,000	169,000,000	244,000,000	280,000,000
Consolidated Net Income	300,000,000	314,000,000	471,000,000	524,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	5,000,000	5,000,000	9,000,000	9,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	295,000,000	309,000,000	462,000,000	515,000,000
Gulf Power [Member]
Operating Revenues:
Retail revenues	294,878,000	320,474,000	533,398,000	595,300,000
Wholesale revenues, non-affiliates	28,729,000	38,874,000	55,847,000	69,893,000
Wholesale revenues, affiliates	28,702,000	22,857,000	65,066,000	26,992,000
Other revenues	17,899,000	17,060,000	32,142,000	31,688,000
Total operating revenues	370,208,000	399,265,000	686,453,000	723,873,000
Operating Expenses:
Fuel	141,220,000	178,686,000	262,308,000	310,468,000
Purchased power, non-affiliates	12,085,000	10,889,000	23,310,000	17,892,000
Purchased power, affiliates	5,210,000	12,549,000	7,723,000	29,167,000
Other operations and maintenance	79,779,000	72,583,000	155,009,000	153,092,000
Depreciation and amortization	35,173,000	32,304,000	68,480,000	64,060,000
Taxes other than income taxes	25,276,000	24,867,000	49,060,000	49,763,000
Total operating expenses	298,743,000	331,878,000	565,890,000	624,442,000
Operating Income	71,465,000	67,387,000	120,563,000	99,431,000
Other Income and (Expense):
Allowance for equity funds used during construction	1,736,000	2,522,000	2,973,000	4,657,000
Interest income	1,809,000	20,000	1,396,000	34,000
Interest expense, net of amounts capitalized	(15,698,000)	(14,423,000)	(31,066,000)	(28,052,000)
Other income (expense), net	(697,000)	(447,000)	(1,293,000)	(1,010,000)
Total other income and (expense)	(12,850,000)	(12,328,000)	(27,990,000)	(24,371,000)
Earnings Before Income Taxes	58,615,000	55,059,000	92,573,000	75,060,000
Income taxes	22,102,000	20,157,000	33,843,000	26,916,000
Consolidated Net Income	36,513,000	34,902,000	58,730,000	48,144,000
Dividends on Preferred and Preference Stock of Subsidiaries	1,550,000	1,550,000	3,101,000	3,101,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	34,963,000	33,352,000	55,629,000	45,043,000
Mississippi Power [Member]
Operating Revenues:
Retail revenues	192,177,000	207,005,000	358,448,000	387,479,000
Wholesale revenues, non-affiliates	64,116,000	67,813,000	118,347,000	137,664,000
Wholesale revenues, affiliates	5,324,000	6,303,000	9,364,000	15,603,000
Other revenues	4,467,000	4,920,000	8,639,000	8,571,000
Total operating revenues	266,084,000	286,041,000	494,798,000	549,317,000
Operating Expenses:
Fuel	105,469,000	123,674,000	194,088,000	244,728,000
Purchased power, non-affiliates	1,134,000	1,336,000	3,077,000	2,346,000
Purchased power, affiliates	10,843,000	19,867,000	19,703,000	28,217,000
Other operations and maintenance	60,501,000	64,512,000	115,396,000	134,879,000
Depreciation and amortization	22,517,000	20,345,000	44,998,000	40,208,000
Taxes other than income taxes	18,634,000	17,251,000	40,337,000	34,732,000
Total operating expenses	219,098,000	246,985,000	417,599,000	485,110,000
Operating Income	46,986,000	39,056,000	77,199,000	64,207,000
Other Income and (Expense):
Allowance for equity funds used during construction	13,870,000	4,991,000	25,697,000	8,122,000
Interest income	380,000	401,000	500,000	743,000
Interest expense, net of amounts capitalized	(13,023,000)	(5,532,000)	(20,828,000)	(11,545,000)
Other income (expense), net	(539,000)	(613,000)	(781,000)	(1,016,000)
Total other income and (expense)	688,000	(753,000)	4,588,000	(3,696,000)
Earnings Before Income Taxes	47,674,000	38,303,000	81,787,000	60,511,000
Income taxes	12,214,000	12,587,000	20,639,000	19,745,000
Consolidated Net Income	35,460,000	25,716,000	61,148,000	40,766,000
Dividends on Preferred and Preference Stock of Subsidiaries	433,000	433,000	866,000	866,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	35,027,000	25,283,000	60,282,000	39,900,000
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	177,865,000	232,960,000	318,422,000	430,126,000
Wholesale revenues, affiliates	105,950,000	70,569,000	217,738,000	153,843,000
Other revenues	1,990,000	1,680,000	3,326,000	3,027,000
Total operating revenues	285,805,000	305,209,000	539,486,000	586,996,000
Operating Expenses:
Fuel	91,551,000	101,158,000	180,629,000	203,873,000
Purchased power, non-affiliates	22,514,000	19,664,000	43,164,000	28,606,000
Purchased power, affiliates	2,914,000	22,178,000	5,254,000	37,277,000
Other operations and maintenance	40,205,000	40,047,000	88,594,000	82,801,000
Depreciation and amortization	34,016,000	30,805,000	65,929,000	60,972,000
Taxes other than income taxes	4,567,000	4,565,000	9,535,000	9,328,000
Total operating expenses	195,767,000	218,417,000	393,105,000	422,857,000
Operating Income	90,038,000	86,792,000	146,381,000	164,139,000
Other Income and (Expense):
Interest expense, net of amounts capitalized	(13,949,000)	(17,774,000)	(27,591,000)	(36,603,000)
Other income (expense), net	(194,000)	(260,000)	(164,000)	(201,000)
Total other income and (expense)	(14,143,000)	(18,034,000)	(27,755,000)	(36,804,000)
Earnings Before Income Taxes	75,895,000	68,758,000	118,626,000	127,335,000
Income taxes	29,293,000	24,157,000	42,708,000	44,991,000
Consolidated Net Income	$ 46,602,000	$ 44,601,000	$ 75,918,000	$ 82,344,000