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The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."}],"balance_after":63973,"derivative":{"exercise_price":0,"underlying":"Southern Company Common Stock","underlying_shares":20377},"source":{"system":"sec-edgar","filing":"0001209191-17-042830","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/92122/000120919117042830/doc4.xml","form_type":"4"}},{"id":4268652,"issuer":{"id":1308,"kind":"organization","name":"SOUTHERN CO","symbol":"SO"},"owners":[{"id":33681,"kind":"person","name":"Evans Andrew W","position":1,"cik":"0001338158","reported_name":"Evans Andrew W","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres & CEO, Southern Co. Gas"}}],"security":"Southern Company Common Stock","published_at":"2017-07-03T20:18:11.000Z","date":"2017-07-01","kind":"exercise","acquired":true,"shares":21100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each performance stock unit (PSU) represents the right to receive, at settlement, one share of Southern Company common stock. On July 1, 2017, 20,377 PSUs and 723 dividend equivalent units vested."},{"field":"shares","element":"transactionShares","label":"F2","text":"Shares will be withheld to satisfy tax withholding obligations once the amount of tax withholding is determined."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each performance stock unit (PSU) represents the right to receive, at settlement, one share of Southern Company common stock. On July 1, 2017, 20,377 PSUs and 723 dividend equivalent units vested."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares will be withheld to satisfy tax withholding obligations once the amount of tax withholding is determined."}],"balance_after":32416,"source":{"system":"sec-edgar","filing":"0001209191-17-042830","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/92122/000120919117042830/doc4.xml","form_type":"4"}},{"id":4591352,"issuer":{"id":1308,"kind":"organization","name":"SOUTHERN CO","symbol":"SO"},"owners":[{"id":33681,"kind":"person","name":"Evans Andrew W","position":1,"cik":"0001338158","reported_name":"Evans Andrew W","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres & CEO, Southern Co. Gas"}}],"security":"Southern Co. Performance Stock Units Holding","published_at":"2016-10-03T21:17:08.000Z","date":"2016-09-29","kind":"grant","acquired":true,"shares":84350,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the award will vest on July 1, 2017, July 1, 2018 and July 1, 2019.  The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the award will vest on July 1, 2017, July 1, 2018 and July 1, 2019.  The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"A portion of the award will vest on July 1, 2017, July 1, 2018 and July 1, 2019.  The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"A portion of the award will vest on July 1, 2017, July 1, 2018 and July 1, 2019.  The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019."}],"balance_after":84350,"derivative":{"exercise_price":0,"underlying":"Southern Company Common Stock","underlying_shares":84350},"source":{"system":"sec-edgar","filing":"0001209191-16-143681","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/92122/000120919116143681/doc4.xml","form_type":"4"}}]}