Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Income	$ 1,710,000,000	$ 2,415,000,000	$ 2,268,000,000
Qualifying hedges:
Changes in fair value, net of tax	0	(12,000,000)	(18,000,000)
Reclassification adjustment for amounts included in net income, net of tax	9,000,000	11,000,000	9,000,000
Marketable securities:
Change in fair value, net of tax	(3,000,000)	0	(4,000,000)
Pension and other postretirement benefit plans:
Benefit plan net gain (loss),net of tax	36,000,000	(3,000,000)	(2,000,000)
Reclassification adjustment for amounts included in net income, net of tax	6,000,000	(8,000,000)	(26,000,000)
Total other comprehensive income (loss)	48,000,000	(12,000,000)	(41,000,000)
Dividends on preferred and preference stock	(66,000,000)	(65,000,000)	(65,000,000)
Comprehensive Income	1,692,000,000	2,338,000,000	2,162,000,000
Alabama Power [Member]
Net Income	751,000,000	743,000,000	747,000,000
Qualifying hedges:
Changes in fair value, net of tax	0	(11,000,000)	(9,000,000)
Reclassification adjustment for amounts included in net income, net of tax	1,000,000	2,000,000	(2,000,000)
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	1,000,000	(9,000,000)	(11,000,000)
Dividends on preferred and preference stock	(39,000,000)	(39,000,000)	(39,000,000)
Comprehensive Income	752,000,000	734,000,000	736,000,000
Georgia Power [Member]
Net Income	1,191,000,000	1,185,000,000	1,162,000,000
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	2,000,000	2,000,000	2,000,000
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	2,000,000	2,000,000	2,000,000
Dividends on preferred and preference stock	(17,000,000)	(17,000,000)	(17,000,000)
Comprehensive Income	1,193,000,000	1,187,000,000	1,164,000,000
Gulf Power [Member]
Net Income	132,133,000	132,135,000	111,208,000
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	472,000	573,000	573,000
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	472,000	573,000	573,000
Dividends on preferred and preference stock	(7,704,000)	(6,203,000)	(6,203,000)
Comprehensive Income	132,605,000	132,708,000	111,781,000
Mississippi Power [Member]
Net Income	(474,892,000)	101,675,000	95,915,000
Qualifying hedges:
Changes in fair value, net of tax	0	(479,000)	(8,870,000)
Reclassification adjustment for amounts included in net income, net of tax	849,000	663,000	(29,000)
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	849,000	184,000	(8,899,000)
Dividends on preferred and preference stock	(1,733,000)	(1,733,000)	(1,733,000)
Comprehensive Income	(474,043,000)	101,859,000	87,016,000
Southern Power [Member]
Net Income	165,533,000	175,285,000	162,231,000
Qualifying hedges:
Changes in fair value, net of tax	0	(136,000)	65,000
Reclassification adjustment for amounts included in net income, net of tax	3,695,000	6,189,000	7,125,000
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	3,695,000	6,053,000	7,190,000
Comprehensive Income	$ 169,228,000	$ 181,338,000	$ 169,421,000