Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Southern Company [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	$ 1,000,000	$ 1,000,000	$ 2,000,000	$ 5,000,000
Reclassification adjustment for amounts of pension and other post retirement benefit plans included in net income, tax	1,000,000	1,000,000	2,000,000	3,000,000
Alabama Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	1,000,000	1,000,000	1,000,000	1,000,000
Georgia Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	1,000,000	0	1,000,000	1,000,000
Gulf Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	58,000	58,000	175,000	238,000
Mississippi Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	131,000	131,000	394,000	394,000
Southern Power [Member]
Changes in fair value, tax	(1,000)	0	(1,000)	0
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	$ 52,000	$ 213,000	$ 115,000	$ 2,310,000