Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	$ 1,000,000	$ 2,000,000
Reclassification adjustment for amounts of pension and other post retirement benefit plans included in net income, tax	0	1,000,000
Alabama Power [Member]
Changes in fair value, tax	0	0
Georgia Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	0	0
Gulf Power [Member]
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	58,000	90,000
Mississippi Power [Member]
Changes in fair value, tax	(1,000)	0
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	131,000	131,000
Southern Power [Member]
Changes in fair value, tax	(1,000)	0
Reclassification adjustment for amounts of qualifying hedges included in net income, tax	$ 39,000	$ 1,045,000