SOUTHERN CO

0001000 - Document - Cover Page

1001000 - Statement - Condensed Consolidated Statements of Income (Unaudited)

1001001 - Statement - Condensed Consolidated Statements of Income (Unaudited) (Parenthetical)

1002000 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)

1002501 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical)

1003000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)

1003501 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)

1004000 - Statement - Condensed Consolidated Balance Sheets (Unaudited)

1004501 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

1005000 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited)

1005501 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical)

2101100 - Disclosure - INTRODUCTION

2102100 - Disclosure - REGULATORY MATTERS

2103100 - Disclosure - CONTINGENCIES

2104100 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME

2105100 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS

2107100 - Disclosure - FINANCING

2108100 - Disclosure - INCOME TAXES

2109100 - Disclosure - RETIREMENT BENEFITS

2110100 - Disclosure - FAIR VALUE MEASUREMENTS

2111100 - Disclosure - DERIVATIVES

2112100 - Disclosure - ACQUISITIONS AND DISPOSITIONS

2114100 - Disclosure - SEGMENT AND RELATED INFORMATION

2201201 - Disclosure - INTRODUCTION (Policies)

2301302 - Disclosure - INTRODUCTION (Tables)

2302301 - Disclosure - REGULATORY MATTERS (Tables)

2304301 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME (Tables)

2305301 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS (Tables)

2307301 - Disclosure - FINANCING (Tables)

2309301 - Disclosure - RETIREMENT BENEFITS (Tables)

2310301 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)

2311301 - Disclosure - DERIVATIVES (Tables)

2312301 - Disclosure - ACQUISITIONS AND DISPOSITIONS (Tables)

2314301 - Disclosure - SEGMENT AND RELATED INFORMATION (Tables)

2401403 - Disclosure - INTRODUCTION - Narrative (Details)

2401404 - Disclosure - INTRODUCTION - Goodwill (Details)

2401405 - Disclosure - INTRODUCTION - Other Intangible Assets (Details)

2401406 - Disclosure - INTRODUCTION - Other Intangible Assets, Amortization (Details)

2401407 - Disclosure - INTRODUCTION - Restricted Cash (Details)

2401408 - Disclosure - INTRODUCTION - Asset Retirement Obligations (Details)

2402402 - Disclosure - REGULATORY MATTERS - Cost Recovery Clauses (Details)

2402403 - Disclosure - REGULATORY MATTERS - Alabama Power (Details)

2402404 - Disclosure - REGULATORY MATTERS - Georgia Power (Details)

2402406 - Disclosure - REGULATORY MATTERS - Nuclear Construction (Details)

2402407 - Disclosure - REGULATORY MATTERS - Nuclear Construction Cost and Schedule (Details)

2402408 - Disclosure - REGULATORY MATTERS - Mississippi Power (Details)

2402410 - Disclosure - REGULATORY MATTERS - Southern Company Gas (Details)

2403401 - Disclosure - CONTINGENCIES - General Litigation Matters (Details)

2403402 - Disclosure - CONTINGENCIES - Environmental Remediation (Details)

2403403 - Disclosure - CONTINGENCIES - Other Matters (Details)

2404402 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME - Disaggregate Revenue Sources (Details)

2404403 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME - Contract Balances (Details)

2404404 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME - Narrative (Details)

2404406 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME - Performance Obligations (Details)

2404407 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS AND LEASE INCOME - Summary of Lease Income (Details)

2405402 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS - Narrative (Details)

2405403 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS - Balance Sheet Equity Method Investment Carrying Amount (Details)

2405404 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS - Income Statement Equity Method Investment Carrying Amount (Details)

2405405 - Disclosure - CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS - Investment in SNG (Details)

2407402 - Disclosure - FINANCING - Schedule of Credit Arrangements (Details)

2407403 - Disclosure - FINANCING - Narrative (Details)

2407406 - Disclosure - FINANCING - Shares Used to Compute Diluted Earnings Per Share (Details)

2408401 - Disclosure - INCOME TAXES (Details)

2409402 - Disclosure - RETIREMENT BENEFITS (Details)

2410402 - Disclosure - FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)

2410403 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Increase (Decrease) In Fair Value Of Funds (Details)

2410404 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details)

2410405 - Disclosure - FAIR VALUE MEASUREMENTS - Financial Instruments for which Carrying Amount did not Equal Fair Value (Details)

2410406 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Commodity Derivative Contracts that Include a Significant Unobservable Component (Details)

2411402 - Disclosure - DERIVATIVES - Energy-Related Derivatives (Details)

2411403 - Disclosure - DERIVATIVES - Narrative (Details)

2411404 - Disclosure - DERIVATIVES - Interest Rate Derivatives (Details)

2411405 - Disclosure - DERIVATIVES - Foreign Currency Derivatives (Details)

2411406 - Disclosure - DERIVATIVES - Derivative Financial Statement Presentation and Amounts With Balance Sheet Offsetting (Details)

2411407 - Disclosure - DERIVATIVES - Pre-tax Effects of Derivatives Designated as Cash Flow Hedging Instruments (Details)

2411408 - Disclosure - DERIVATIVES - Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging Relationships (Details)

2411409 - Disclosure - DERIVATIVES - Cumulative Basis Adjustments for Fair Value Hedges (Details)

2411410 - Disclosure - DERIVATIVES - Pre-tax Effects of Derivatives Not Designated as Hedging (Details)

2412404 - Disclosure - ACQUISITIONS AND DISPOSITIONS - Schedule of Acquisition (Details)

2412405 - Disclosure - ACQUISITIONS AND DISPOSITIONS - Southern Power Narrative (Details)

2412406 - Disclosure - ACQUISITIONS AND DISPOSITIONS - Schedule of Construction Projects (Details)

2412407 - Disclosure - ACQUISITIONS AND DISPOSITIONS - Pre-tax Profit (Details)

2412408 - Disclosure - ACQUISITIONS AND DISPOSITIONS - Southern Company Gas Narrative (Details)

2414402 - Disclosure - SEGMENT AND RELATED INFORMATION - Narrative (Details)

2414403 - Disclosure - SEGMENT AND RELATED INFORMATION - Financial Data for Business Segments (Details)

2414404 - Disclosure - SEGMENT AND RELATED INFORMATION - Financial Data for Products and Services (Details)