Condensed Consolidated Statements of Income (Unaudited) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Revenues:
Retail revenues	$ 3,092,000,000	$ 3,396,000,000
Wholesale revenues	349,000,000	449,000,000
Other electric revenues	148,000,000	150,000,000
Other revenues	15,000,000	17,000,000
Total operating revenues	3,604,000,000	4,012,000,000
Operating Expenses:
Fuel	1,064,000,000	1,476,000,000
Purchased power	141,000,000	100,000,000
Other operations and maintenance	967,000,000	944,000,000
Depreciation and amortization	441,000,000	418,000,000
Taxes other than income taxes	225,000,000	220,000,000
Total operating expenses	2,838,000,000	3,158,000,000
Operating Income	766,000,000	854,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	31,000,000	35,000,000
Interest expense, net of amounts capitalized	(211,000,000)	(222,000,000)
Other income (expense), net	(2,000,000)	2,000,000
Total other income and (expense)	(182,000,000)	(185,000,000)
Earnings Before Income Taxes	584,000,000	669,000,000
Income taxes	200,000,000	231,000,000
Consolidated Net Income	384,000,000	438,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	16,000,000	16,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	368,000,000	422,000,000
Earnings per share (EPS) -
Basic EPS	$ 0.42	$ 0.50
Diluted EPS	$ 0.42	$ 0.49
Average number of shares of common stock outstanding (in millions)
Basic	868	848
Diluted	877	854
Cash dividends paid per share of common stock	$ 0.4725	$ 0.4550
Alabama Power [Member]
Operating Revenues:
Retail revenues	1,092,000,000	1,126,000,000
Wholesale revenues, non-affiliates	61,000,000	68,000,000
Wholesale revenues, affiliates	14,000,000	75,000,000
Other revenues	49,000,000	51,000,000
Total operating revenues	1,216,000,000	1,320,000,000
Operating Expenses:
Fuel	306,000,000	395,000,000
Purchased power, non-affiliates	15,000,000	11,000,000
Purchased power, affiliates	40,000,000	46,000,000
Other operations and maintenance	321,000,000	297,000,000
Depreciation and amortization	157,000,000	157,000,000
Taxes other than income taxes	86,000,000	85,000,000
Total operating expenses	925,000,000	991,000,000
Operating Income	291,000,000	329,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	5,000,000	5,000,000
Interest income	4,000,000	4,000,000
Interest expense, net of amounts capitalized	(73,000,000)	(74,000,000)
Other income (expense), net	(7,000,000)	(6,000,000)
Total other income and (expense)	(71,000,000)	(71,000,000)
Earnings Before Income Taxes	220,000,000	258,000,000
Income taxes	84,000,000	96,000,000
Consolidated Net Income	136,000,000	162,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	10,000,000	10,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	126,000,000	152,000,000
Georgia Power [Member]
Operating Revenues:
Retail revenues	1,594,000,000	1,815,000,000
Wholesale revenues, non-affiliates	66,000,000	83,000,000
Wholesale revenues, affiliates	3,000,000	11,000,000
Other revenues	82,000,000	80,000,000
Total operating revenues	1,745,000,000	1,989,000,000
Operating Expenses:
Fuel	440,000,000	677,000,000
Purchased power, non-affiliates	93,000,000	74,000,000
Purchased power, affiliates	159,000,000	163,000,000
Other operations and maintenance	434,000,000	422,000,000
Depreciation and amortization	188,000,000	173,000,000
Taxes other than income taxes	87,000,000	87,000,000
Total operating expenses	1,401,000,000	1,596,000,000
Operating Income	344,000,000	393,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	13,000,000	25,000,000
Interest expense, net of amounts capitalized	(91,000,000)	(96,000,000)
Other income (expense), net	(3,000,000)	(1,000,000)
Total other income and (expense)	(81,000,000)	(72,000,000)
Earnings Before Income Taxes	263,000,000	321,000,000
Income taxes	92,000,000	111,000,000
Consolidated Net Income	171,000,000	210,000,000
Dividends on Preferred and Preference Stock of Subsidiaries	4,000,000	4,000,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	167,000,000	206,000,000
Gulf Power [Member]
Operating Revenues:
Retail revenues	238,520,000	274,826,000
Wholesale revenues, non-affiliates	27,118,000	31,019,000
Wholesale revenues, affiliates	36,364,000	4,135,000
Other revenues	14,243,000	14,628,000
Total operating revenues	316,245,000	324,608,000
Operating Expenses:
Fuel	121,088,000	131,782,000
Purchased power, non-affiliates	11,225,000	7,003,000
Purchased power, affiliates	2,513,000	16,618,000
Other operations and maintenance	75,230,000	80,509,000
Depreciation and amortization	33,307,000	31,756,000
Taxes other than income taxes	23,784,000	24,896,000
Total operating expenses	267,147,000	292,564,000
Operating Income	49,098,000	32,044,000
Other Income and (Expense):
Allowance for equity funds used during construction	1,237,000	2,135,000
Interest expense, net of amounts capitalized	(15,368,000)	(13,629,000)
Other income (expense), net	(1,009,000)	(549,000)
Total other income and (expense)	(15,140,000)	(12,043,000)
Earnings Before Income Taxes	33,958,000	20,001,000
Income taxes	11,741,000	6,759,000
Consolidated Net Income	22,217,000	13,242,000
Dividends on Preferred and Preference Stock of Subsidiaries	1,551,000	1,551,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	20,666,000	11,691,000
Mississippi Power [Member]
Operating Revenues:
Retail revenues	166,271,000	180,474,000
Wholesale revenues, non-affiliates	54,231,000	69,851,000
Wholesale revenues, affiliates	4,040,000	9,300,000
Other revenues	4,172,000	3,651,000
Total operating revenues	228,714,000	263,276,000
Operating Expenses:
Fuel	88,619,000	121,054,000
Purchased power, non-affiliates	1,943,000	1,010,000
Purchased power, affiliates	8,860,000	8,350,000
Other operations and maintenance	54,895,000	70,367,000
Depreciation and amortization	22,481,000	19,863,000
Taxes other than income taxes	21,703,000	17,481,000
Total operating expenses	198,501,000	238,125,000
Operating Income	30,213,000	25,151,000
Other Income and (Expense):
Allowance for equity funds used during construction	11,827,000	3,131,000
Interest income	120,000	342,000
Interest expense, net of amounts capitalized	(7,805,000)	(6,013,000)
Other income (expense), net	(242,000)	(403,000)
Total other income and (expense)	3,900,000	(2,943,000)
Earnings Before Income Taxes	34,113,000	22,208,000
Income taxes	8,425,000	7,158,000
Consolidated Net Income	25,688,000	15,050,000
Dividends on Preferred and Preference Stock of Subsidiaries	433,000	433,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	25,255,000	14,617,000
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	140,557,000	197,166,000
Wholesale revenues, affiliates	111,788,000	83,274,000
Other revenues	1,336,000	1,347,000
Total operating revenues	253,681,000	281,787,000
Operating Expenses:
Fuel	89,078,000	102,715,000
Purchased power, non-affiliates	20,650,000	8,942,000
Purchased power, affiliates	2,340,000	15,099,000
Other operations and maintenance	48,389,000	42,754,000
Depreciation and amortization	31,913,000	30,167,000
Taxes other than income taxes	4,968,000	4,763,000
Total operating expenses	197,338,000	204,440,000
Operating Income	56,343,000	77,347,000
Other Income and (Expense):
Interest expense, net of amounts capitalized	(13,642,000)	(18,829,000)
Other income (expense), net	30,000	59,000
Total other income and (expense)	(13,612,000)	(18,770,000)
Earnings Before Income Taxes	42,731,000	58,577,000
Income taxes	13,415,000	20,834,000
Consolidated Net Income	$ 29,316,000	$ 37,743,000