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

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

2113100 - Disclosure - Leases

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 (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)

2313301 - Disclosure - Leases (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 - Intangibles, 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)

2402405 - Disclosure - Regulatory Matters - Requested Recovery of Proposed Increases (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)

2402409 - Disclosure - Regulatory Matters - Kemper County Energy Facility (Details)

2402410 - Disclosure - Regulatory Matters - Southern Company Gas (Details)

2402411 - Disclosure - Regulatory Matters - FERC Matters (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 - Disaggregate Revenue Sources (Details)

2404403 - Disclosure - Revenue from Contracts with Customers - Contract Balances (Details)

2404404 - Disclosure - Revenue from Contracts with Customers - Narrative (Details)

2404405 - Disclosure - Revenue from Contracts with Customers - Revenue from Contracts with Customers (Details)

2404406 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (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 - Narrative (Details)

2407403 - Disclosure - Financing - Schedule of Credit Arrangements (Details)

2407404 - Disclosure - Financing - Schedule of Long-Term Debt Financing Activities (Details)

2407405 - 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 and Interest Rate Derivatives (Details)

2411403 - Disclosure - Derivatives - Narrative (Details)

2411404 - Disclosure - Derivatives - Foreign Currency Derivatives (Details)

2411405 - Disclosure - Derivatives - Derivative Financial Statement Presentation and Amounts With Balance Sheet Offsetting (Details)

2411406 - Disclosure - Derivatives - Pre-tax Effects of Derivatives Designated as Cash Flow Hedging Instruments (Details)

2411407 - Disclosure - Derivatives - Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging Relationships (Details)

2411408 - Disclosure - Derivatives - Cumulative Basis Adjustments for Fair Value Hedges (Details)

2411409 - Disclosure - Derivatives - Pre-tax Effects of Derivatives Not Designated as Hedging (Details)

2412402 - Disclosure - Acquisitions and Dispositions - Southern Company Narrative (Details)

2412403 - Disclosure - Acquisitions and Dispositions - Southern Power Narrative (Details)

2412404 - Disclosure - Acquisitions and Dispositions - Schedule of Construction Projects (Details)

2412405 - Disclosure - Acquisitions and Dispositions - Assets Held for Sale (Details)

2412406 - Disclosure - Acquisitions and Dispositions - Pre-tax Profit (Details)

2413402 - Disclosure - Leases - Major Categories of Lease Obligations (Details)

2413403 - Disclosure - Leases - Narrative (Details)

2413404 - Disclosure - Leases - Balance Sheet Amounts Recorded for Operating and Financing Leases (Details)

2413405 - Disclosure - Leases - Lease Costs (Details)

2413406 - Disclosure - Leases - Other Information (Details)

2413407 - Disclosure - Leases - Maturities of Lease Liabilities (Details)

2413408 - Disclosure - Leases - Lease Income (Details)

2413409 - Disclosure - Leases - Undiscounted Cash Flows to be Received Under Tolling Arrangements Accounted for as Sales-type Leases (Details)

2413410 - Disclosure - Leases - Undiscounted Cash Flows to be Received Under PPAs Accounted for as Operating Leases (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)