Condensed Consolidated Statements of Income (Unaudited) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Operating Revenues:
Retail revenues	$ 3,298,000,000		$ 3,092,000,000
Wholesale revenues	432,000,000		349,000,000
Other electric revenues	155,000,000		148,000,000
Other revenues	12,000,000		15,000,000
Total operating revenues	3,897,000,000		3,604,000,000
Operating Expenses:
Fuel	1,262,000,000		1,064,000,000
Purchased power	95,000,000		141,000,000
Other operations and maintenance	974,000,000		967,000,000
Depreciation and amortization	466,000,000		441,000,000
Taxes other than income taxes	235,000,000		225,000,000
Estimated loss on Kemper IGCC	540,000,000		0
Total operating expenses	3,572,000,000		2,838,000,000
Operating Income	325,000,000		766,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	41,000,000		31,000,000
Leveraged lease income (loss)	(21,000,000)		6,000,000
Interest expense, net of amounts capitalized	(211,000,000)		(211,000,000)
Other income (expense), net	(6,000,000)		(8,000,000)
Total other income and (expense)	(197,000,000)		(182,000,000)
Earnings Before Income Taxes	128,000,000		584,000,000
Income taxes	31,000,000		200,000,000
Consolidated Net Income	97,000,000		384,000,000
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	81,000,000	[1],[2]	368,000,000	[1]
Earnings per share (EPS) -
Basic EPS (in dollars per share)	$ 0.09		$ 0.42
Diluted EPS (in dollars per share)	$ 0.09		$ 0.42
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	870		868
Diluted (in shares)	875		877
Cash dividends paid per share of common stock	$ 0.4900		$ 0.4725
Alabama Power [Member]
Operating Revenues:
Retail revenues	1,141,000,000		1,092,000,000
Wholesale revenues, non-affiliates	59,000,000		61,000,000
Wholesale revenues, affiliates	56,000,000		14,000,000
Other revenues	52,000,000		49,000,000
Total operating revenues	1,308,000,000		1,216,000,000
Operating Expenses:
Fuel	372,000,000		306,000,000
Purchased power, non-affiliates	20,000,000		15,000,000
Purchased power, affiliates	31,000,000		40,000,000
Other operations and maintenance	330,000,000		321,000,000
Depreciation and amortization	158,000,000		157,000,000
Taxes other than income taxes	90,000,000		86,000,000
Total operating expenses	1,001,000,000		925,000,000
Operating Income	307,000,000		291,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	8,000,000		5,000,000
Interest expense, net of amounts capitalized	(66,000,000)		(73,000,000)
Other income (expense), net	(1,000,000)		(3,000,000)
Total other income and (expense)	(59,000,000)		(71,000,000)
Earnings Before Income Taxes	248,000,000		220,000,000
Income taxes	97,000,000		84,000,000
Consolidated Net Income	151,000,000		136,000,000
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	141,000,000		126,000,000
Georgia Power [Member]
Operating Revenues:
Retail revenues	1,729,000,000		1,594,000,000
Wholesale revenues, non-affiliates	62,000,000		66,000,000
Wholesale revenues, affiliates	6,000,000		3,000,000
Other revenues	85,000,000		82,000,000
Total operating revenues	1,882,000,000		1,745,000,000
Operating Expenses:
Fuel	519,000,000		440,000,000
Purchased power, non-affiliates	50,000,000		93,000,000
Purchased power, affiliates	175,000,000		159,000,000
Other operations and maintenance	431,000,000		434,000,000
Depreciation and amortization	200,000,000		188,000,000
Taxes other than income taxes	95,000,000		87,000,000
Total operating expenses	1,470,000,000		1,401,000,000
Operating Income	412,000,000		344,000,000
Other Income and (Expense):
Allowance for equity funds used during construction	6,000,000		13,000,000
Interest expense, net of amounts capitalized	(91,000,000)		(91,000,000)
Other income (expense), net	(2,000,000)		(3,000,000)
Total other income and (expense)	(87,000,000)		(81,000,000)
Earnings Before Income Taxes	325,000,000		263,000,000
Income taxes	124,000,000		92,000,000
Consolidated Net Income	201,000,000		171,000,000
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	197,000,000		167,000,000
Gulf Power [Member]
Operating Revenues:
Retail revenues	259,877,000		238,520,000
Wholesale revenues, non-affiliates	21,208,000		27,118,000
Wholesale revenues, affiliates	29,455,000		36,364,000
Other revenues	15,734,000		14,243,000
Total operating revenues	326,274,000		316,245,000
Operating Expenses:
Fuel	120,846,000		121,088,000
Purchased power, non-affiliates	11,135,000		11,225,000
Purchased power, affiliates	3,312,000		2,513,000
Other operations and maintenance	78,662,000		75,230,000
Depreciation and amortization	37,053,000		33,307,000
Taxes other than income taxes	23,626,000		23,784,000
Total operating expenses	274,634,000		267,147,000
Operating Income	51,640,000		49,098,000
Other Income and (Expense):
Allowance for equity funds used during construction	1,134,000		1,237,000
Interest expense, net of amounts capitalized	(14,369,000)		(15,368,000)
Other income (expense), net	(976,000)		(1,009,000)
Total other income and (expense)	(14,211,000)		(15,140,000)
Earnings Before Income Taxes	37,429,000		33,958,000
Income taxes	14,086,000		11,741,000
Consolidated Net Income	23,343,000		22,217,000
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	21,792,000		20,666,000
Mississippi Power [Member]
Operating Revenues:
Retail revenues	168,310,000		166,271,000
Wholesale revenues, non-affiliates	65,109,000		54,231,000
Wholesale revenues, affiliates	8,341,000		4,040,000
Other revenues	4,174,000		4,172,000
Total operating revenues	245,934,000		228,714,000
Operating Expenses:
Fuel	104,564,000		88,619,000
Purchased power, non-affiliates	1,367,000		1,943,000
Purchased power, affiliates	9,689,000		8,860,000
Other operations and maintenance	54,812,000		54,895,000
Depreciation and amortization	23,233,000		22,481,000
Taxes other than income taxes	19,417,000		21,703,000
Estimated loss on Kemper IGCC	462,000,000		0
Total operating expenses	675,082,000		198,501,000
Operating Income	(429,148,000)		30,213,000
Other Income and (Expense):
Allowance for equity funds used during construction	26,074,000		11,827,000
Interest expense, net of amounts capitalized	(10,409,000)		(7,805,000)
Other income (expense), net	(1,547,000)		(122,000)
Total other income and (expense)	14,118,000		3,900,000
Earnings Before Income Taxes	(415,030,000)		34,113,000
Income taxes	(169,142,000)		8,425,000
Consolidated Net Income	(245,888,000)		25,688,000
Dividends on Preferred and Preference Stock of Subsidiaries	433,000		433,000
Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries	(246,321,000)		25,255,000
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	223,429,000		140,557,000
Wholesale revenues, affiliates	78,191,000		111,788,000
Other revenues	1,327,000		1,336,000
Total operating revenues	302,947,000		253,681,000
Operating Expenses:
Fuel	119,372,000		89,078,000
Purchased power, non-affiliates	14,573,000		20,650,000
Purchased power, affiliates	7,865,000		2,340,000
Other operations and maintenance	50,950,000		48,389,000
Depreciation and amortization	40,160,000		31,913,000
Taxes other than income taxes	5,354,000		4,968,000
Total operating expenses	238,274,000		197,338,000
Operating Income	64,673,000		56,343,000
Other Income and (Expense):
Interest expense, net of amounts capitalized	(20,394,000)		(13,642,000)
Other income (expense), net	(257,000)		30,000
Total other income and (expense)	(20,651,000)		(13,612,000)
Earnings Before Income Taxes	44,022,000		42,731,000
Income taxes	14,830,000		13,415,000
Consolidated Net Income	$ 29,192,000		$ 29,316,000

[1] After dividends on preferred and preference stock of subsidiaries

[2] Segment net income (loss) for the three months ended March 31, 2013 includes a $540.0 million pre-tax charge ($333.5 million after tax) for an estimated probable loss on the Kemper IGCC. See Note (B) under "Integrated Coal Gasification Combined Cycle" herein for additional information.