<SEC-DOCUMENT>0000092122-20-000089.txt : 20201102
<SEC-HEADER>0000092122-20-000089.hdr.sgml : 20201102
<ACCEPTANCE-DATETIME>20201102134312
ACCESSION NUMBER:		0000092122-20-000089
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20201027
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
FILED AS OF DATE:		20201102
DATE AS OF CHANGE:		20201102

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:		201279891

	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-20201027.htm
<DESCRIPTION>8-K
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C.  20549 </span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">FORM <ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" name="dei:DocumentType" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGV4dHJlZ2lvbjo4NjY0NDg2YTYzZmQ0NDU5OTY1MjhlNTllZjc4N2FlYV8xMTI4_770a87c5-504f-4bd0-83fb-dbe7dfc3f917">8-K</ix:nonNumeric> </span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">CURRENT REPORT</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</span></div><div style="text-align:center"><span><br/></span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:443.25pt"><tr><td style="width:1.0pt"></td><td style="width:3.25pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:247.75pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:123.25pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:61.00pt"></td><td style="width:1.0pt"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Date of Report (Date of earliest event reported)</span></td><td colspan="3" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt:datemonthdayyearen" name="dei:DocumentPeriodEndDate" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6ZjkxODlmZDkyOTAxNDhkNDg0NzNjZGM5YjY1YzFmMjcvdGFibGVyYW5nZTpmOTE4OWZkOTI5MDE0OGQ0ODQ3M2NkYzliNjVjMWYyN18wLTItMS0xLTA_8895164f-aad7-4ec1-9d03-9e526072d065">October 27, 2020</ix:nonNumeric></span></td><td colspan="3" style="padding:0 1pt"></td></tr></table></div><div><span><br/></span></div><div style="margin-top:14pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:94.883%"><tr><td style="width:1.0%"></td><td style="width:5.679%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:17.235%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:5.679%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:35.109%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:5.679%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:17.235%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:5.684%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commission<br/>File Number</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Registrant,<br/>State of Incorporation,<br/>Address and Telephone Number</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">I.R.S. 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" name="dei:EntityAddressCityOrTown" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGV4dHJlZ2lvbjo4NjY0NDg2YTYzZmQ0NDU5OTY1MjhlNTllZjc4N2FlYV8xMTM0_705c7859-aa46-4601-ae0a-20d00edd6eff">Atlanta</ix:nonNumeric>, <ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt-sec:stateprovnameen" name="dei:EntityAddressStateOrProvince" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGV4dHJlZ2lvbjo4NjY0NDg2YTYzZmQ0NDU5OTY1MjhlNTllZjc4N2FlYV8xMTMw_2af7d827-91ff-4726-b8a7-5b8ed29d8d57">Georgia</ix:nonNumeric> 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<ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" name="dei:LocalPhoneNumber" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGV4dHJlZ2lvbjo4NjY0NDg2YTYzZmQ0NDU5OTY1MjhlNTllZjc4N2FlYV8xMTMx_2b84088a-2028-4756-b0af-63e52de6085a">506-5000</ix:nonNumeric> </span></div><div style="text-align:justify"><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">The name and address of the registrant have not changed since the last report.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</span></div><div><span><br/></span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:513.00pt"><tr><td style="width:1.0pt"></td><td style="width:30.25pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:478.75pt"></td><td style="width:1.0pt"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt-sec:boolballotbox" name="dei:WrittenCommunications" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NGY1N2U5ZjRiODhlNGNlYWEzODhiYmI0ZWRhNWI4ZWYvdGFibGVyYW5nZTo0ZjU3ZTlmNGI4OGU0Y2VhYTM4OGJiYjRlZGE1YjhlZl8wLTAtMS0xLTA_7df8fdc6-e66f-497d-b8e8-46432b9fc58e">&#9744;</ix:nonNumeric></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Written communications pursuant to Rule 425 under the Securities Act (17&#160;CFR&#160;230.425)</span></td></tr><tr style="height:15pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt-sec:boolballotbox" name="dei:SolicitingMaterial" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NGY1N2U5ZjRiODhlNGNlYWEzODhiYmI0ZWRhNWI4ZWYvdGFibGVyYW5nZTo0ZjU3ZTlmNGI4OGU0Y2VhYTM4OGJiYjRlZGE1YjhlZl8xLTAtMS0xLTA_880e78da-f6d1-4448-b471-32613869eb49">&#9744;</ix:nonNumeric></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17&#160;CFR&#160;240.14a-12)</span></td></tr><tr style="height:27pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt-sec:boolballotbox" name="dei:PreCommencementTenderOffer" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NGY1N2U5ZjRiODhlNGNlYWEzODhiYmI0ZWRhNWI4ZWYvdGFibGVyYW5nZTo0ZjU3ZTlmNGI4OGU0Y2VhYTM4OGJiYjRlZGE1YjhlZl8yLTAtMS0xLTA_634e91c9-2c70-49cf-97ef-f77aef9718c8">&#9744;</ix:nonNumeric></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</span></td></tr><tr style="height:27pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i186a4f1a97224d3a888608b93934eb2e_D20201102-20201102" format="ixt-sec:boolballotbox" name="dei:PreCommencementIssuerTenderOffer" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NGY1N2U5ZjRiODhlNGNlYWEzODhiYmI0ZWRhNWI4ZWYvdGFibGVyYW5nZTo0ZjU3ZTlmNGI4OGU0Y2VhYTM4OGJiYjRlZGE1YjhlZl8zLTAtMS0xLTA_5118cc44-26df-4dc9-9c58-a750f309ec56">&#9744;</ix:nonNumeric></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></td></tr></table></div><div><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div><span><br/></span></div></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">Securities registered pursuant to Section 12(b) of the Act:</span></div><div><span><br/></span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:513.00pt"><tr><td style="width:1.0pt"></td><td style="width:132.25pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:171.25pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:61.75pt"></td><td style="width:1.0pt"></td><td style="width:1.0pt"></td><td style="width:139.75pt"></td><td style="width:1.0pt"></td></tr><tr style="height:27pt"><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Registrant</span></td><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Title of each class</span></td><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Trading<br/>Symbol(s)</span></td><td colspan="3" style="border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Name of each exchange<br/>on which registered</span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i3cbd462fcc4b42179344bdd1d4973981_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8xLTEtMS0xLTA_7615e423-acc1-48b1-a592-0edd81a0c761">Common Stock, par value $5 per share</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i3cbd462fcc4b42179344bdd1d4973981_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8xLTItMS0xLTA_ab8d92f6-5a4b-4b1d-b374-22ced0e8db1f">SO</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i3cbd462fcc4b42179344bdd1d4973981_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8xLTMtMS0xLTA_5d536107-89bd-4a4a-a5dd-3d0c04dbe8ae">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i89ec398bea104cc7b1011625851e6427_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8yLTEtMS0xLTA_c74fce21-f0da-4ff1-8fe9-1ba7fe6aa13e">Series 2015A 6.25% Junior Subordinated Notes due 2075</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i89ec398bea104cc7b1011625851e6427_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8yLTItMS0xLTA_df41b813-8dc9-4492-b421-bdc66ce2d47e">SOJA</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i89ec398bea104cc7b1011625851e6427_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8yLTMtMS0xLTA_96eb86db-f56b-4046-b5ec-ad46e7ca1f9d">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i2191703fb5bf4df69c030ac06023210e_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8zLTEtMS0xLTA_1282d8e0-272d-4d75-b777-3bc040e6e23f">Series 2016A 5.25% Junior Subordinated Notes due 2076</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i2191703fb5bf4df69c030ac06023210e_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8zLTItMS0xLTA_25e3c6f1-d872-41c5-9e7b-74600732be04">SOJB</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i2191703fb5bf4df69c030ac06023210e_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8zLTMtMS0xLTA_9ec2bc26-8678-45cb-aa90-7ee958caf770">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTEtMS0xLTA_5194215a-85d0-4d52-836f-595ead6229a7">Series 2017B 5.25% Junior Subordinated Notes due 2077</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTItMS0xLTA_d7980de6-d53b-4110-8fb1-48fd33c3b053">SOJC</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTMtMS0xLTA_f95b594d-47f3-4828-beea-46deaeb310c9">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTEtMS0xLTA_9aca64ae-58d6-4a4e-aede-b1bcfb48bfdb">2019 Series A Corporate Units</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTItMS0xLTA_300608dc-cc5e-4e96-a4b7-c81bd579d9d7">SOLN</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTMtMS0xLTA_e68f15c2-9b9e-413b-b78c-77a2d1cbad91">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTEtMS0xLTA_cfc912b8-39af-4289-a4ed-e8e2878c1305">Series 2020A 4.95% Junior Subordinated Notes due 2080</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTItMS0xLTA_a8fc02f0-c51a-4838-9230-8a3c8ca6403d">SOJD</ix:nonNumeric></span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTMtMS0xLTA_29757260-3978-4a01-a1ab-d383a27f4441">New York Stock Exchange</ix:nonNumeric></span></td></tr><tr style="height:27pt"><td colspan="3" style="background-color:#cceeff;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Southern Company</span></td><td colspan="3" style="background-color:#cceeff;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i58ed2183a9f64ba1849a0be60be2f3a2_D20201102-20201102" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF83LTEtMS0xLTA_88813408-7e7c-4a82-a743-b434652a4957">Series 2020C 4.20% Junior Subordinated Notes</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i58ed2183a9f64ba1849a0be60be2f3a2_D20201102-20201102" 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Paul Bowers, Chairman, President, and Chief Executive Officer of Georgia Power Company (&#8220;Georgia Power&#8221;), notified Georgia Power of his intention to retire. The effective date of the retirement is expected to be in April 2021.</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">SIGNATURE</span></div><div style="margin-top:6pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:232%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</span></div><div><span><br/></span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:86.873%"><tr><td style="width:1.0%"></td><td style="width:41.854%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:4.502%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:50.344%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Date:&#160;&#160;&#160;November 2, 2020</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">THE SOUTHERN COMPANY<br/><br/><br/><br/></span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">By</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">/s/Melissa K. Caen</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Melissa K. Caen<br/>Assistant Secretary</span></td></tr></table></div><div><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div></body></html>
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    <link:label id="lab_dei_CityAreaCode_7fc8ef31-8f44-4ac9-b4d0-e8040d46cecd_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_90280dd6-282d-41ea-a9d8-7277341752a4_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SolicitingMaterial_01057e5c-2538-43d3-8704-4da29a158061_terseLabel_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:label id="lab_dei_SolicitingMaterial_label_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_SolicitingMaterial"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SolicitingMaterial" xlink:to="lab_dei_SolicitingMaterial" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_c45f4ac4-3430-4bd8-8dd9-7d3548f6964b_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentPeriodEndDate"/>
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    <link:label id="lab_dei_EntityTaxIdentificationNumber_a5fddb6f-8756-4e80-94b7-8c7b070d9ddd_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockMember_371b5ea0-a3b9-4436-9d0e-7d4457dda142_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, par value $5 per share</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_label_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementTenderOffer_714281e5-45a6-4ac3-8113-b8249997a1c1_terseLabel_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_PreCommencementTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementTenderOffer" xlink:to="lab_dei_PreCommencementTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_b51cdd77-a99f-49df-a348-1fcabd0f2f0a_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
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    <link:label id="lab_us-gaap_ClassOfStockDomain_1ab9c1fe-6431-40b3-97e4-fa9812960c5a_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockDomain_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain" xlink:to="lab_us-gaap_ClassOfStockDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_ac3b5aca-852f-40dc-b62e-c7553bd6ab57_terseLabel_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_label_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementClassOfStockAxis" xlink:to="lab_us-gaap_StatementClassOfStockAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_c0acea56-bff1-478f-9d6d-93663da40320_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_4144ed4c-2fff-4444-8231-d01267eabdc2_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_c483ec3d-9f14-4098-98bf-70fd074792ae_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_label_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member_a2ad42d1-fd6b-456a-b942-04af5b2c6d94_terseLabel_en-US" xlink:label="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series 2020A 4.95% Junior Subordinated Notes Due 2080 [Member]</link:label>
    <link:label id="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member_label_en-US" xlink:label="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series 2020A 4.95% Junior Subordinated Notes Due 2080 [Member]</link:label>
    <link:label id="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member_documentation_en-US" xlink:label="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series 2020A 4.95% Junior Subordinated Notes Due 2080 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:href="so-20201027.xsd#so_Series2020A4.95JuniorSubordinatedNotesDue2080Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:to="lab_so_Series2020A4.95JuniorSubordinatedNotesDue2080Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_15f162e8-1f28-4cdd-bb65-32034c5adc00_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_928b19bc-a538-4a09-8fd2-98acb803f2b0_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_WrittenCommunications_27ed71b9-2cb6-40ba-b34c-47604e2bb54f_terseLabel_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:label id="lab_dei_WrittenCommunications_label_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_WrittenCommunications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_WrittenCommunications" xlink:to="lab_dei_WrittenCommunications" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_12e32214-03ac-4dc8-85b9-fd9e2374904f_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_7909bfcc-0278-47fc-86a9-23f654c746f0_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
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      contextRef="i2191703fb5bf4df69c030ac06023210e_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF8zLTMtMS0xLTA_9ec2bc26-8678-45cb-aa90-7ee958caf770">NYSE</dei:SecurityExchangeName>
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      contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTEtMS0xLTA_5194215a-85d0-4d52-836f-595ead6229a7">Series 2017B 5.25% Junior Subordinated Notes due 2077</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTItMS0xLTA_d7980de6-d53b-4110-8fb1-48fd33c3b053">SOJC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="ic94719a38460477e8b423e9e142c62b0_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF80LTMtMS0xLTA_f95b594d-47f3-4828-beea-46deaeb310c9">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTEtMS0xLTA_9aca64ae-58d6-4a4e-aede-b1bcfb48bfdb">2019 Series A Corporate Units</dei:Security12bTitle>
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      contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTItMS0xLTA_300608dc-cc5e-4e96-a4b7-c81bd579d9d7">SOLN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i857015b1fe5c45918104ee7e80d96453_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF81LTMtMS0xLTA_e68f15c2-9b9e-413b-b78c-77a2d1cbad91">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTEtMS0xLTA_cfc912b8-39af-4289-a4ed-e8e2878c1305">Series 2020A 4.95% Junior Subordinated Notes due 2080</dei:Security12bTitle>
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      contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTItMS0xLTA_a8fc02f0-c51a-4838-9230-8a3c8ca6403d">SOJD</dei:TradingSymbol>
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      contextRef="ie429c86dc7db4bc59f86b5bb336c95fb_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF82LTMtMS0xLTA_29757260-3978-4a01-a1ab-d383a27f4441">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="i58ed2183a9f64ba1849a0be60be2f3a2_D20201102-20201102"
      id="id3VybDovL2RvY3MudjEvZG9jOjhkZDdmNWE5NjQ5NzQyMmE4NDUxNzkyNjg5OTc2MjY0L3NlYzo4ZGQ3ZjVhOTY0OTc0MjJhODQ1MTc5MjY4OTk3NjI2NF8xL2ZyYWc6ODY2NDQ4NmE2M2ZkNDQ1OTk2NTI4ZTU5ZWY3ODdhZWEvdGFibGU6NDk0YjA5Nzk0OGMyNDBhNWIwOGU5ZmE0ZGU5NTdmMGQvdGFibGVyYW5nZTo0OTRiMDk3OTQ4YzI0MGE1YjA4ZTlmYTRkZTk1N2YwZF83LTEtMS0xLTA_88813408-7e7c-4a82-a743-b434652a4957">Series 2020C 4.20% Junior Subordinated Notes</dei:Security12bTitle>
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      contextRef="i58ed2183a9f64ba1849a0be60be2f3a2_D20201102-20201102"
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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<body>
<span style="display: none;">v3.20.2</span><table class="report" border="0" cellspacing="2" id="idm140083126163640">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover Page Document<br></strong></div></th>
<th class="th"><div>Nov. 02, 2020</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Oct. 27,  2020<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">1-3526<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">The Southern Company<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">58-0690070<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">30 Ivan Allen Jr. Boulevard, N.W<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Atlanta<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">GA<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">30308<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">404<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">506-5000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000092122<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember', window );">Common Stock, par value $5 per share</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common Stock, par value $5 per share<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SO<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2015A6.25JuniorSubordinatedNotesDue2075Member', window );">Series 2015A 6.25% Junior Subordinated Notes due 2075</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series 2015A 6.25% Junior Subordinated Notes due 2075<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOJA<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2016A5.25JuniorSubordinatedNotesDue2076Member', window );">Series 2016A 5.25% Junior Subordinated Notes due 2076</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series 2016A 5.25% Junior Subordinated Notes due 2076<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOJB<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2017B5.25JuniorSubordinatedNotesDue2077Member', window );">Series 2017B 5.25% Junior Subordinated Notes due 2077</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series 2017B 5.25% Junior Subordinated Notes due 2077<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOJC<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2019ACorporateUnitsMember', window );">Series 2019A Corporate Units [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">2019 Series A Corporate Units<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOLN<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2020A4.95JuniorSubordinatedNotesDue2080Member', window );">Series 2020A 4.95% Junior Subordinated Notes Due 2080 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series 2020A 4.95% Junior Subordinated Notes due 2080<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOJD<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=so_Series2020C4.20JuniorSubordinatedNotesMember', window );">Series 2020C 4.20% Junior Subordinated Notes [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Series 2020C 4.20% Junior Subordinated Notes<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">SOJE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:booleanItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentInformationLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentInformationLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>dei:submissionTypeItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=so_Series2015A6.25JuniorSubordinatedNotesDue2075Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=so_Series2015A6.25JuniorSubordinatedNotesDue2075Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=so_Series2016A5.25JuniorSubordinatedNotesDue2076Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=so_Series2016A5.25JuniorSubordinatedNotesDue2076Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
