Acquisitions (Details) (USD $)					3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Southern Power [Member]	Dec. 31, 2013 Southern Power [Member]	Mar. 31, 2014 Adobe Solar LLC [Member] Southern Power [Member] MW
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent					90.00%
Acquisitions (Textual) [Abstract]
Power of solar polycrystalline silicon facility					20
Beginning Year Of Output Of Constructed Plant1					2014
Life Output Of Plant					20 years
Cash Consideration for acquisition of the interests in Apex					$ 94,400,000
Business Acquisition Cost Paid At Closing					75,500,000
Construction in Progress, Gross	$ 7,425,000,000	$ 7,151,000,000	$ 10,926,000	$ 9,843,000	$ 81,000,000