<SEC-DOCUMENT>0000092122-21-000026-index.html : 20210226 <SEC-HEADER>0000092122-21-000026.hdr.sgml : 20210226 <ACCEPTANCE-DATETIME>20210226141850 ACCESSION NUMBER: 0000092122-21-000026 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 32 CONFORMED PERIOD OF REPORT: 20210223 ITEM INFORMATION: Other Events ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20210226 DATE AS OF CHANGE: 20210226 FILER: COMPANY DATA: COMPANY CONFORMED NAME: SOUTHERN CO CENTRAL INDEX KEY: 0000092122 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC SERVICES [4911] IRS NUMBER: 580690070 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-03526 FILM NUMBER: 21687318 BUSINESS ADDRESS: STREET 1: 30 IVAN ALLEN JR. BLVD., N.W. CITY: ATLANTA STATE: GA ZIP: 30308 BUSINESS PHONE: 4045065000 MAIL ADDRESS: STREET 1: 30 IVAN ALLEN JR. BLVD., N.W. CITY: ATLANTA STATE: GA ZIP: 30308 </SEC-HEADER> <DOCUMENT> <TYPE>8-K <SEQUENCE>1 <FILENAME>so-20210223.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: so-20210223.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-1.3A <SEQUENCE>2 <FILENAME>x1-3aso8k2021a2021bsn.htm <DESCRIPTION>EX-1.3A <TEXT> Document 2 - file: x1-3aso8k2021a2021bsn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-1.3B <SEQUENCE>3 <FILENAME>x1-3bso8k2021a2021bsn.htm <DESCRIPTION>EX-1.3B <TEXT> Document 3 - file: x1-3bso8k2021a2021bsn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.4A <SEQUENCE>4 <FILENAME>so22ndsupindent2021asrnote.htm <DESCRIPTION>EX-4.4A <TEXT> Document 4 - file: so22ndsupindent2021asrnote.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.4B <SEQUENCE>5 <FILENAME>so23rdsupindent2021bsrnote.htm <DESCRIPTION>EX-4.4B <TEXT> Document 5 - file: so23rdsupindent2021bsrnote.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1A <SEQUENCE>6 <FILENAME>ex5-1aso8xk2021asn.htm <DESCRIPTION>EX-5.1A <TEXT> Document 6 - file: ex5-1aso8xk2021asn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1B <SEQUENCE>7 <FILENAME>ex5-1bso8xk2021bsn.htm <DESCRIPTION>EX-5.1B <TEXT> Document 7 - file: ex5-1bso8xk2021bsn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-8.1A <SEQUENCE>8 <FILENAME>ex8-1aso8xk2021asn.htm <DESCRIPTION>EX-8.1A <TEXT> Document 8 - file: ex8-1aso8xk2021asn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-8.1B <SEQUENCE>9 <FILENAME>ex8-1bso8xk2021bsn.htm <DESCRIPTION>EX-8.1B <TEXT> Document 9 - file: ex8-1bso8xk2021bsn.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>10 <FILENAME>so-20210223.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT <TEXT> Document 10 - file: so-20210223.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.CAL <SEQUENCE>11 <FILENAME>so-20210223_cal.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT <TEXT> Document 11 - file: so-20210223_cal.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.DEF <SEQUENCE>12 <FILENAME>so-20210223_def.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT <TEXT> Document 12 - file: so-20210223_def.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>13 <FILENAME>so-20210223_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT <TEXT> Document 13 - file: so-20210223_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>14 <FILENAME>so-20210223_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT <TEXT> Document 14 - file: so-20210223_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>hunton2018large1.jpg <TEXT> Document 15 - file: hunton2018large1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>hunton2018large1a.jpg <TEXT> Document 16 - file: hunton2018large1a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>hunton2018small1.jpg <TEXT> Document 17 - file: hunton2018small1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>hunton2018small1a.jpg <TEXT> Document 18 - file: hunton2018small1a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>image_01a.jpg <TEXT> Document 19 - file: image_01a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>troutpepperbanner1.jpg <TEXT> Document 20 - file: troutpepperbanner1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>troutpepperbanner1a.jpg <TEXT> Document 21 - file: troutpepperbanner1a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>troutpepperlogo111.jpg <TEXT> Document 22 - file: troutpepperlogo111.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>23 <FILENAME>troutpepperlogo1231.jpg <TEXT> Document 23 - file: troutpepperlogo1231.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>24 <FILENAME>troutpepperlogo1a.jpg <TEXT> Document 24 - file: troutpepperlogo1a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>25 <FILENAME>so-20210223_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 25 - file: so-20210223_htm.html
Document 25 - RAW XML: so-20210223_htm.xml
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>26 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 26 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>EXCEL <SEQUENCE>27 <FILENAME>Financial_Report.xlsx <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 27 - file: Financial_Report.xlsx
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>28 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 28 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>29 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 29 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>30 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 30 - file: FilingSummary.html
Document 30 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>32 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 32 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>33 <FILENAME>0000092122-21-000026-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 33 - file: 0000092122-21-000026-xbrl.zip
</DOCUMENT> </SEC-DOCUMENT>