SOUTHERN CO
10-K · 2019-02-20T00:00:00Z · 0000092122-19-000006211 tables
Cover (2)
Statements (12)
- R2.htmConsolidated Statements of Income
1001000 - Statement - Consolidated Statements of Income
- R3.htmConsolidated Statements of Income (Parenthetical)
1001001 - Statement - Consolidated Statements of Income (Parenthetical)
- R4.htmConsolidated Statements of Comprehensive Income
1002000 - Statement - Consolidated Statements of Comprehensive Income
- R5.htmConsolidated Statements of Comprehensive Income (Loss) (Parenthetical)
1002501 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)
- R6.htmConsolidated Statements of Cash Flows
1003000 - Statement - Consolidated Statements of Cash Flows
- R7.htmConsolidated Statements of Cash Flows (Parenthetical)
1003501 - Statement - Consolidated Statements of Cash Flows (Parenthetical)
- R8.htmConsolidated Balance Sheets
1004000 - Statement - Consolidated Balance Sheets
- R9.htmConsolidated Balance Sheets (Parenthetical)
1004501 - Statement - Consolidated Balance Sheets (Parenthetical)
- R10.htmConsolidated Statements of Capitalization
1005000 - Statement - Consolidated Statements of Capitalization
- R11.htmConsolidated Statements of Capitalization (Parenthetical)
1005501 - Statement - Consolidated Statements of Capitalization (Parenthetical)
- R12.htmConsolidated Statements of Stockholders' Equity
1006000 - Statement - Consolidated Statements of Stockholders' Equity
- R13.htmConsolidated Statements of Stockholders' Equity (Parenthetical)
1006501 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)
Notes (17)
- R14.htmSummary of Significant Accounting Policies
2101100 - Disclosure - Summary of Significant Accounting Policies
- R15.htmRegulatory Matters
2102100 - Disclosure - Regulatory Matters
- R16.htmContingencies
2103100 - Disclosure - Contingencies
- R17.htmRevenue from Contracts with Customers
2104100 - Disclosure - Revenue from Contracts with Customers
- R18.htmProperty, Plant, and Equipment (Notes)
2105100 - Disclosure - Property, Plant, and Equipment (Notes)
- R19.htmAsset Retirement Obligations
2106100 - Disclosure - Asset Retirement Obligations
- R20.htmConsolidated Entities and Equity Method Investments
2107100 - Disclosure - Consolidated Entities and Equity Method Investments
- R21.htmFinancing
2108100 - Disclosure - Financing
- R22.htmCommitments
2109100 - Disclosure - Commitments
- R23.htmIncome Taxes
2110100 - Disclosure - Income Taxes
- R24.htmRetirement Benefits
2111100 - Disclosure - Retirement Benefits
- R25.htmStock Compensation
2113100 - Disclosure - Stock Compensation
- R26.htmFair Value Measurements
2114100 - Disclosure - Fair Value Measurements
- R27.htmDerivatives
2115100 - Disclosure - Derivatives
- R28.htmAcquisitions and Dispositions
2116100 - Disclosure - Acquisitions and Dispositions
- R29.htmSegment and Related Information (Notes)
2117100 - Disclosure - Segment and Related Information (Notes)
- R30.htmQuarterly Financial Information (Unaudited)
2118100 - Disclosure - Quarterly Financial Information (Unaudited)
Uncategorized (180)
- R31.htmValuation and Qualifying Accounts
2119100 - Schedule - Valuation and Qualifying Accounts
- R32.htmSummary of Significant Accounting Policies (Policies)
2201201 - Disclosure - Summary of Significant Accounting Policies (Policies)
- R33.htmSummary of Significant Accounting Policies (Tables)
2301302 - Disclosure - Summary of Significant Accounting Policies (Tables)
- R34.htmRegulatory Matters (Tables)
2302301 - Disclosure - Regulatory Matters (Tables)
- R35.htmContingencies (Tables)
2303301 - Disclosure - Contingencies (Tables)
- R36.htmRevenue from Contracts with Customers (Tables)
2304301 - Disclosure - Revenue from Contracts with Customers (Tables)
- R37.htmProperty, Plant, and Equipment (Tables)
2305301 - Disclosure - Property, Plant, and Equipment (Tables)
- R38.htmAsset Retirement Obligations (Tables)
2306301 - Disclosure - Asset Retirement Obligations (Tables)
- R39.htmConsolidated Entities and Equity Method Investments (Tables)
2307301 - Disclosure - Consolidated Entities and Equity Method Investments (Tables)
- R40.htmFinancing (Tables)
2308301 - Disclosure - Financing (Tables)
- R41.htmCommitments (Tables)
2309301 - Disclosure - Commitments (Tables)
- R42.htmIncome Taxes (Tables)
2310301 - Disclosure - Income Taxes (Tables)
- R43.htmRetirement Benefits (Tables)
2311301 - Disclosure - Retirement Benefits (Tables)
- R44.htmStock Compensation (Tables)
2313301 - Disclosure - Stock Compensation (Tables)
- R45.htmFair Value Measurements (Tables)
2314301 - Disclosure - Fair Value Measurements (Tables)
- R46.htmDerivatives (Tables)
2315301 - Disclosure - Derivatives (Tables)
- R47.htmAcquisitions and Dispositions (Tables)
2316301 - Disclosure - Acquisitions and Dispositions (Tables)
- R48.htmSegment and Related Information (Tables)
2317301 - Disclosure - Segment and Related Information (Tables)
- R49.htmQuarterly Financial Information (Unaudited) (Tables)
2318301 - Disclosure - Quarterly Financial Information (Unaudited) (Tables)
- R50.htmSummary of Significant Accounting Policies - General (Narrative) (Details)
2401403 - Disclosure - Summary of Significant Accounting Policies - General (Narrative) (Details)
- R51.htmSummary of Significant Accounting Policies - Schedule of Specific Impacts of Applying ASC 606 to Revenues from Contracts with Customers (Details)
2401404 - Disclosure - Summary of Significant Accounting Policies - Schedule of Specific Impacts of Applying ASC 606 to Revenues from Contracts with Customers (Details)
- R52.htmSummary of Significant Accounting Policies - Schedule of Costs for Affiliate Transactions (Details)
2401405 - Disclosure - Summary of Significant Accounting Policies - Schedule of Costs for Affiliate Transactions (Details)
- R53.htmSummary of Significant Accounting Policies - Affiliate Transactions (Narrative) (Details)
2401406 - Disclosure - Summary of Significant Accounting Policies - Affiliate Transactions (Narrative) (Details)
- R54.htmSummary of Significant Accounting Policies - Revenues (Narrative) (Details)
2401407 - Disclosure - Summary of Significant Accounting Policies - Revenues (Narrative) (Details)
- R55.htmSummary of Significant Accounting Policies - Concentration of Revenue (Narrative) (Details)
2401408 - Disclosure - Summary of Significant Accounting Policies - Concentration of Revenue (Narrative) (Details)
- R56.htmSummary of Significant Accounting Policies - Schedule of Concentration of Revenue (Details)
2401409 - Disclosure - Summary of Significant Accounting Policies - Schedule of Concentration of Revenue (Details)
- R57.htmSummary of Significant Accounting Policies - Income and Other Taxes (Narrative) (Details)
2401410 - Disclosure - Summary of Significant Accounting Policies - Income and Other Taxes (Narrative) (Details)
- R58.htmSummary of Significant Accounting Policies - Schedule of Total AFUDC and Interest Capitalized (Details)
2401411 - Disclosure - Summary of Significant Accounting Policies - Schedule of Total AFUDC and Interest Capitalized (Details)
- R59.htmSummary of Significant Accounting Policies - Schedule of Average AFUDC Composite Rates (Details)
2401412 - Disclosure - Summary of Significant Accounting Policies - Schedule of Average AFUDC Composite Rates (Details)
- R60.htmSummary of Significant Accounting Policies - Schedule of Goodwill Balances (Details)
2401413 - Disclosure - Summary of Significant Accounting Policies - Schedule of Goodwill Balances (Details)
- R61.htmSummary of Significant Accounting Policies - Schedule of Other Intangible Assets (Details)
2401414 - Disclosure - Summary of Significant Accounting Policies - Schedule of Other Intangible Assets (Details)
- R62.htmSummary of Significant Accounting Policies - Schedule of Amortization of Other Intangible Assets (Details)
2401415 - Disclosure - Summary of Significant Accounting Policies - Schedule of Amortization of Other Intangible Assets (Details)
- R63.htmSummary of Significant Accounting Policies - Goodwill and Other Intangible Assets and Liabilities (Narrative) (Details)
2401416 - Disclosure - Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets and Liabilities (Narrative) (Details)
- R64.htmSummary of Significant Accounting Policies - Transmission Receivables/Prepayments (Narrative) (Details)
2401417 - Disclosure - Summary of Significant Accounting Policies - Transmission Receivables/Prepayments (Narrative) (Details)
- R65.htmSummary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details)
2401418 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details)
- R66.htmSummary of Significant Accounting Policies - Schedule of Storm Damage Reserves (Details)
2401419 - Disclosure - Summary of Significant Accounting Policies - Schedule of Storm Damage Reserves (Details)
- R67.htmSummary of Significant Accounting Policies - Leveraged Leases (Narrative) (Details)
2401420 - Disclosure - Summary of Significant Accounting Policies - Leveraged Leases (Narrative) (Details)
- R68.htmSummary of Significant Accounting Policies - Schedule of Net Investment in Domestic and International Leveraged Leases (Details)
2401421 - Disclosure - Summary of Significant Accounting Policies - Schedule of Net Investment in Domestic and International Leveraged Leases (Details)
- R69.htmSummary of Significant Accounting Policies - Summary of the Components of Income from Leveraged Leases (Details)
2401422 - Disclosure - Summary of Significant Accounting Policies - Summary of the Components of Income from Leveraged Leases (Details)
- R70.htmSummary of Significant Accounting Policies - Natural Gas for Sale (Narrative) (Details)
2401423 - Disclosure - Summary of Significant Accounting Policies - Natural Gas for Sale (Narrative) (Details)
- R71.htmSummary of Significant Accounting Policies - Energy Marketing Receivables and Payables (Narrative) (Details)
2401424 - Disclosure - Summary of Significant Accounting Policies - Energy Marketing Receivables and Payables (Narrative) (Details)
- R72.htmSummary of Significant Accounting Policies - Provision for Uncollectible Accounts (Narrative) (Details)
2401425 - Disclosure - Summary of Significant Accounting Policies - Provision for Uncollectible Accounts (Narrative) (Details)
- R73.htmSummary of Significant Accounting Policies - Concentration of Credit Risk (Narrative) (Details)
2401426 - Disclosure - Summary of Significant Accounting Policies - Concentration of Credit Risk (Narrative) (Details)
- R74.htmSummary of Significant Accounting Policies - Financial Instruments (Narrative) (Details)
2401427 - Disclosure - Summary of Significant Accounting Policies - Financial Instruments (Narrative) (Details)
- R75.htmSummary of Significant Accounting Policies - Schedule of AOCI (Loss) Balances, Net of Tax Effects (Details)
2401428 - Disclosure - Summary of Significant Accounting Policies - Schedule of AOCI (Loss) Balances, Net of Tax Effects (Details)
- R76.htmRegulatory Matters - Schedule of SO Regulatory Assets and Liabilities (Details)
2402402 - Disclosure - Regulatory Matters - Schedule of SO Regulatory Assets and Liabilities (Details)
- R77.htmRegulatory Matters - Gulf Power Regulatory Matters (Details)
2402403 - Disclosure - Regulatory Matters - Gulf Power Regulatory Matters (Details)
- R78.htmRegulatory Matters - Schedule of APC Regulatory Assets and Liabilities (Details)
2402404 - Disclosure - Regulatory Matters - Schedule of APC Regulatory Assets and Liabilities (Details)
- R79.htmRegulatory Matters - APC Regulatory Matters (Details)
2402405 - Disclosure - Regulatory Matters - APC Regulatory Matters (Details)
- R80.htmRegulatory Matters - Schedule of GPC Regulatory Assets and Liabilities (Details)
2402406 - Disclosure - Regulatory Matters - Schedule of GPC Regulatory Assets and Liabilities (Details)
- R81.htmRegulatory Matters - GPC Regulatory Matters (Details)
2402407 - Disclosure - Regulatory Matters - GPC Regulatory Matters (Details)
- R82.htmRegulatory Matters - Nuclear Construction (Details)
2402408 - Disclosure - Regulatory Matters - Nuclear Construction (Details)
- R83.htmRegulatory Matters - Schedule of Nuclear Construction Cost and Schedule (Details)
2402409 - Disclosure - Regulatory Matters - Schedule of Nuclear Construction Cost and Schedule (Details)
- R84.htmRegulatory Matters - Nuclear Construction Joint Owner Contracts (Details)
2402410 - Disclosure - Regulatory Matters - Nuclear Construction Joint Owner Contracts (Details)
- R85.htmRegulatory Matters - Nuclear Construction Regulatory Matters (Details)
2402411 - Disclosure - Regulatory Matters - Nuclear Construction Regulatory Matters (Details)
- R86.htmRegulatory Matters - Nuclear Construction DOE Financing (Details)
2402412 - Disclosure - Regulatory Matters - Nuclear Construction DOE Financing (Details)
- R87.htmRegulatory Matters - Schedule of MPC Regulatory Assets and Labilities (Details)
2402413 - Disclosure - Regulatory Matters - Schedule of MPC Regulatory Assets and Labilities (Details)
- R88.htmRegulatory Matters - MPC Regulatory Matters (Details)
2402414 - Disclosure - Regulatory Matters - MPC Regulatory Matters (Details)
- R89.htmRegulatory Matters - Kemper Regulatory Matters (Details)
2402415 - Disclosure - Regulatory Matters - Kemper Regulatory Matters (Details)
- R90.htmRegulatory Matters - Schedule of GAS Regulatory Assets and Liabilities (Details)
2402416 - Disclosure - Regulatory Matters - Schedule of GAS Regulatory Assets and Liabilities (Details)
- R91.htmRegulatory Matters - GAS Regulatory Matters (Details)
2402417 - Disclosure - Regulatory Matters - GAS Regulatory Matters (Details)
- R92.htmRegulatory Matters - Schedule of GAS Unrecognized Ratemaking Amounts (Details)
2402418 - Disclosure - Regulatory Matters - Schedule of GAS Unrecognized Ratemaking Amounts (Details)
- R93.htmRegulatory Matters - FERC Matters (Details)
2402419 - Disclosure - Regulatory Matters - FERC Matters (Details)
- R94.htmRegulatory Matters - MPC FERC Regulatory Matters (Details)
2402420 - Disclosure - Regulatory Matters - MPC FERC Regulatory Matters (Details)
- R95.htmRegulatory Matters - GAS FERC Regulatory Matters (Details)
2402421 - Disclosure - Regulatory Matters - GAS FERC Regulatory Matters (Details)
- R96.htmContingencies - SO Litigation (Details)
2403402 - Disclosure - Contingencies - SO Litigation (Details)
- R97.htmContingencies - APC Litigation (Details)
2403403 - Disclosure - Contingencies - APC Litigation (Details)
- R98.htmContingencies - GPC Litigation (Details)
2403404 - Disclosure - Contingencies - GPC Litigation (Details)
- R99.htmContingencies - MPC Litigation (Details)
2403405 - Disclosure - Contingencies - MPC Litigation (Details)
- R100.htmContingencies - SPC Litigation (Details)
2403406 - Disclosure - Contingencies - SPC Litigation (Details)
- R101.htmContingencies - GAS Litigation (Details)
2403407 - Disclosure - Contingencies - GAS Litigation (Details)
- R102.htmContingencies - GPC and GAS Environmental Remediation (Details)
2403408 - Disclosure - Contingencies - GPC and GAS Environmental Remediation (Details)
- R103.htmContingencies - Nuclear Fuel Disposal Costs and Nuclear Insurance (Details)
2403409 - Disclosure - Contingencies - Nuclear Fuel Disposal Costs and Nuclear Insurance (Details)
- R104.htmContingencies - Other Matters (Details)
2403410 - Disclosure - Contingencies - Other Matters (Details)
- R105.htmRevenue from Contracts with Customers - Disaggregate Revenue Sources (Details)
2404402 - Disclosure - Revenue from Contracts with Customers - Disaggregate Revenue Sources (Details)
- R106.htmRevenue from Contracts with Customers - Contract Balances (Details)
2404403 - Disclosure - Revenue from Contracts with Customers - Contract Balances (Details)
- R107.htmRevenue from Contracts with Customers - Performance Obligations (Details)
2404404 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (Details)
- R108.htmProperty, Plant, and Equipment - Property, Plant and Equipment (Details)
2405402 - Disclosure - Property, Plant, and Equipment - Property, Plant and Equipment (Details)
- R109.htmProperty, Plant, and Equipment - Additional Information (Narrative) (Details)
2405403 - Disclosure - Property, Plant, and Equipment - Additional Information (Narrative) (Details)
- R110.htmProperty, Plant, and Equipment - Assets Acquired Under a Capital Lease (Details)
2405404 - Disclosure - Property, Plant, and Equipment - Assets Acquired Under a Capital Lease (Details)
- R111.htmProperty, Plant, and Equipment - Composite Straight-Line Rates (Details)
2405405 - Disclosure - Property, Plant, and Equipment - Composite Straight-Line Rates (Details)
- R112.htmProperty, Plant, and Equipment - Depreciation and Amortization (Narrative) (Details)
2405406 - Disclosure - Property, Plant, and Equipment - Depreciation and Amortization (Narrative) (Details)
- R113.htmProperty, Plant, and Equipment - Ownership and Investment in Jointly-Owned Facilities (Details)
2405407 - Disclosure - Property, Plant, and Equipment - Ownership and Investment in Jointly-Owned Facilities (Details)
- R114.htmProperty, Plant, and Equipment - Joint Ownership Agreements (Narrative) (Details)
2405408 - Disclosure - Property, Plant, and Equipment - Joint Ownership Agreements (Narrative) (Details)
- R115.htmProperty, Plant, and Equipment - Assets Subject to Lien (Narrative) (Details)
2405409 - Disclosure - Property, Plant, and Equipment - Assets Subject to Lien (Narrative) (Details)
- R116.htmAsset Retirement Obligations - Details of AROs Included in the Balance Sheets (Details)
2406402 - Disclosure - Asset Retirement Obligations - Details of AROs Included in the Balance Sheets (Details)
- R117.htmAsset Retirement Obligations - Narrative (Details)
2406403 - Disclosure - Asset Retirement Obligations - Narrative (Details)
- R118.htmAsset Retirement Obligations - Investment Securities in the Funds (Details)
2406404 - Disclosure - Asset Retirement Obligations - Investment Securities in the Funds (Details)
- R119.htmAsset Retirement Obligations - Fair Value Increases (Decreases) of the Funds (Details)
2406405 - Disclosure - Asset Retirement Obligations - Fair Value Increases (Decreases) of the Funds (Details)
- R120.htmAsset Retirement Obligations - Accumulated Provisions for the External Decommissioning Trust Funds (Details)
2406406 - Disclosure - Asset Retirement Obligations - Accumulated Provisions for the External Decommissioning Trust Funds (Details)
- R121.htmAsset Retirement Obligations - Estimated Costs of Decommissioning (Details)
2406407 - Disclosure - Asset Retirement Obligations - Estimated Costs of Decommissioning (Details)
- R122.htmConsolidated Entities and Equity Method Investments - SEGCO Equity Method Investments Narrative (Details)
2407402 - Disclosure - Consolidated Entities and Equity Method Investments - SEGCO Equity Method Investments Narrative (Details)
- R123.htmConsolidated Entities and Equity Method Investments - SPC Noncontrolling Interests and VIEs Narrative (Details)
2407403 - Disclosure - Consolidated Entities and Equity Method Investments - SPC Noncontrolling Interests and VIEs Narrative (Details)
- R124.htmConsolidated Entities and Equity Method Investments - Redeemable Noncontrolling Interest (Details)
2407404 - Disclosure - Consolidated Entities and Equity Method Investments - Redeemable Noncontrolling Interest (Details)
- R125.htmConsolidated Entities and Equity Method Investments - Net Income (Details)
2407405 - Disclosure - Consolidated Entities and Equity Method Investments - Net Income (Details)
- R126.htmConsolidated Entities and Equity Method Investments - GAS Equity Method Investments Narrative (Details)
2407406 - Disclosure - Consolidated Entities and Equity Method Investments - GAS Equity Method Investments Narrative (Details)
- R127.htmConsolidated Entities and Equity Method Investments - Balance Sheet Information (Details)
2407407 - Disclosure - Consolidated Entities and Equity Method Investments - Balance Sheet Information (Details)
- R128.htmConsolidated Entities and Equity Method Investments - Income Statement Information (Details)
2407408 - Disclosure - Consolidated Entities and Equity Method Investments - Income Statement Information (Details)
- R129.htmFinancing - Securities Due Within One Year (Details)
2408402 - Disclosure - Financing - Securities Due Within One Year (Details)
- R130.htmFinancing - Maturities of Long-Term Debt (Details)
2408403 - Disclosure - Financing - Maturities of Long-Term Debt (Details)
- R131.htmFinancing - Long-Term Debt (Details)
2408404 - Disclosure - Financing - Long-Term Debt (Details)
- R132.htmFinancing - Long-Term Debt Narrative (Details)
2408405 - Disclosure - Financing - Long-Term Debt Narrative (Details)
- R133.htmFinancing - DOE Loan Guarantee Borrowings (Details)
2408406 - Disclosure - Financing - DOE Loan Guarantee Borrowings (Details)
- R134.htmFinancing - Other Long-Term Debt Narrative (Details)
2408407 - Disclosure - Financing - Other Long-Term Debt Narrative (Details)
- R135.htmFinancing - Capital Leases Narrative (Details)
2408408 - Disclosure - Financing - Capital Leases Narrative (Details)
- R136.htmFinancing - Secured Debt (Details)
2408409 - Disclosure - Financing - Secured Debt (Details)
- R137.htmFinancing - Bank Credit Arrangements (Details)
2408410 - Disclosure - Financing - Bank Credit Arrangements (Details)
- R138.htmFinancing - Bank Credit Arrangements Narrative (Details)
2408411 - Disclosure - Financing - Bank Credit Arrangements Narrative (Details)
- R139.htmFinancing - Notes Payable (Details)
2408412 - Disclosure - Financing - Notes Payable (Details)
- R140.htmFinancing - Notes Payable Narrative (Details)
2408413 - Disclosure - Financing - Notes Payable Narrative (Details)
- R141.htmFinancing - Outstanding Classes of Capital Stock Narrative (Details)
2408414 - Disclosure - Financing - Outstanding Classes of Capital Stock Narrative (Details)
- R142.htmFinancing - Diluted Earnings Per Share (Details)
2408415 - Disclosure - Financing - Diluted Earnings Per Share (Details)
- R143.htmFinancing - Schedule of Temporary Equity (Details)
2408416 - Disclosure - Financing - Schedule of Temporary Equity (Details)
- R144.htmFinancing - Preferred Stock Redemption (Details)
2408417 - Disclosure - Financing - Preferred Stock Redemption (Details)
- R145.htmFinancing - Dividend Restrictions and Structural Considerations Narrative (Details)
2408418 - Disclosure - Financing - Dividend Restrictions and Structural Considerations Narrative (Details)
- R146.htmCommitments - Fuel and Power Purchase Agreements Narrative (Details)
2409402 - Disclosure - Commitments - Fuel and Power Purchase Agreements Narrative (Details)
- R147.htmCommitments - Fuel Expenses (Details)
2409403 - Disclosure - Commitments - Fuel Expenses (Details)
- R148.htmCommitments - Capacity Expenses (Details)
2409404 - Disclosure - Commitments - Capacity Expenses (Details)
- R149.htmCommitments - Estimated Long-term Obligations (Details)
2409405 - Disclosure - Commitments - Estimated Long-term Obligations (Details)
- R150.htmCommitments - GPC Fuel and Purchased Power, Affiliate Narrative (Details)
2409406 - Disclosure - Commitments - GPC Fuel and Purchased Power, Affiliate Narrative (Details)
- R151.htmCommitments - Pipeline Charges, Storage Capacity, and Gas Supply Narrative (Details)
2409407 - Disclosure - Commitments - Pipeline Charges, Storage Capacity, and Gas Supply Narrative (Details)
- R152.htmCommitments - Contractual Obligations - Pipeline Charges, Storage Capacity, and Gas Supply (Details)
2409408 - Disclosure - Commitments - Contractual Obligations - Pipeline Charges, Storage Capacity, and Gas Supply (Details)
- R153.htmCommitments - Rent Expense (Details)
2409409 - Disclosure - Commitments - Rent Expense (Details)
- R154.htmCommitments - Operating Leases, Guarantees, and Assets Subject to Lien Narrative (Details)
2409410 - Disclosure - Commitments - Operating Leases, Guarantees, and Assets Subject to Lien Narrative (Details)
- R155.htmIncome Taxes - Current and Deferred Income Tax Provisions (Details)
2410402 - Disclosure - Income Taxes - Current and Deferred Income Tax Provisions (Details)
- R156.htmIncome Taxes - Narrative (Details)
2410403 - Disclosure - Income Taxes - Narrative (Details)
- R157.htmIncome Taxes - Amortization of Deferred Credits (Details)
2410404 - Disclosure - Income Taxes - Amortization of Deferred Credits (Details)
- R158.htmIncome Taxes - Reconciliation of Federal Statutory Income Tax Rate (Details)
2410405 - Disclosure - Income Taxes - Reconciliation of Federal Statutory Income Tax Rate (Details)
- R159.htmIncome Taxes - Deferred Tax Assets and Liabilities (Details)
2410406 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Details)
- R160.htmIncome Taxes - Federal ITC/PTC Carryforwards (Details)
2410407 - Disclosure - Income Taxes - Federal ITC/PTC Carryforwards (Details)
- R161.htmIncome Taxes - NOL Carryforwards (Details)
2410408 - Disclosure - Income Taxes - NOL Carryforwards (Details)
- R162.htmIncome Taxes - Changes in Unrecognized Tax Benefits (Details)
2410409 - Disclosure - Income Taxes - Changes in Unrecognized Tax Benefits (Details)
- R163.htmIncome Taxes - Impact of Unrecognized Tax Benefits on Effective Tax Rate, If Recognized (Details)
2410410 - Disclosure - Income Taxes - Impact of Unrecognized Tax Benefits on Effective Tax Rate, If Recognized (Details)
- R164.htmRetirement Benefits - Narrative (Details)
2411402 - Disclosure - Retirement Benefits - Narrative (Details)
- R165.htmRetirement Benefits - Defined Benefit Plan Related to Gulf Power (Details)
2411403 - Disclosure - Retirement Benefits - Defined Benefit Plan Related to Gulf Power (Details)
- R166.htmRetirement Benefits - Actuarial Assumptions (Details)
2411404 - Disclosure - Retirement Benefits - Actuarial Assumptions (Details)
- R167.htmRetirement Benefits - Schedule of Health Care Cost Trend Rates (Details)
2411405 - Disclosure - Retirement Benefits - Schedule of Health Care Cost Trend Rates (Details)
- R168.htmRetirement Benefits - Accumulated Benefit Obligation (Details)
2411406 - Disclosure - Retirement Benefits - Accumulated Benefit Obligation (Details)
- R169.htmRetirement Benefits - Changes in Projected Benefit Obligations and Fair Value of Plan Assets (Details)
2411407 - Disclosure - Retirement Benefits - Changes in Projected Benefit Obligations and Fair Value of Plan Assets (Details)
- R170.htmRetirement Benefits - Amounts Recognized in Balance Sheets and Amounts in AOCI (Details)
2411408 - Disclosure - Retirement Benefits - Amounts Recognized in Balance Sheets and Amounts in AOCI (Details)
- R171.htmRetirement Benefits - Components of Accumulated OCI and Changes in Regulatory Assets (Details)
2411409 - Disclosure - Retirement Benefits - Components of Accumulated OCI and Changes in Regulatory Assets (Details)
- R172.htmRetirement Benefits - Components of Net Periodic Benefit Cost and Estimated Future Benefit Payments (Details)
2411410 - Disclosure - Retirement Benefits - Components of Net Periodic Benefit Cost and Estimated Future Benefit Payments (Details)
- R173.htmRetirement Benefits - Fair Values of Pension Plan and Other Postretirement Benefit Plan Assets (Details)
2411411 - Disclosure - Retirement Benefits - Fair Values of Pension Plan and Other Postretirement Benefit Plan Assets (Details)
- R174.htmRetirement Benefits - 401K Plan Matching Contributions (Details)
2411412 - Disclosure - Retirement Benefits - 401K Plan Matching Contributions (Details)
- R175.htmStock Compensation - Schedule of Employees Participating in Stock-Based Compensation Programs (Details)
2413402 - Disclosure - Stock Compensation - Schedule of Employees Participating in Stock-Based Compensation Programs (Details)
- R176.htmStock Compensation - Performance Shares Narrative (Details)
2413403 - Disclosure - Stock Compensation - Performance Shares Narrative (Details)
- R177.htmStock Compensation - Performance Shares, Assumptions Used (Details)
2413404 - Disclosure - Stock Compensation - Performance Shares, Assumptions Used (Details)
- R178.htmStock Compensation - Performance Shares, Compensation Costs and Related Tax Benefit (Details)
2413405 - Disclosure - Stock Compensation - Performance Shares, Compensation Costs and Related Tax Benefit (Details)
- R179.htmStock Compensation - Restricted Stock Units Narrative (Details)
2413406 - Disclosure - Stock Compensation - Restricted Stock Units Narrative (Details)
- R180.htmStock Compensation - Stock Options Narrative (Details)
2413407 - Disclosure - Stock Compensation - Stock Options Narrative (Details)
- R181.htmStock Compensation - Stock Option Activity (Details)
2413408 - Disclosure - Stock Compensation - Stock Option Activity (Details)
- R182.htmStock Compensation - Aggregate Intrinsic Value for Options Exercised (Details)
2413409 - Disclosure - Stock Compensation - Aggregate Intrinsic Value for Options Exercised (Details)
- R183.htmStock Compensation - Merger Stock Compensation (Details)
2413410 - Disclosure - Stock Compensation - Merger Stock Compensation (Details)
- R184.htmFair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
2414402 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
- R185.htmFair Value Measurements - Narrative (Details)
2414403 - Disclosure - Fair Value Measurements - Narrative (Details)
- R186.htmFair Value Measurements - Financial Instruments, Carrying Amount Not Equal to Fair Value (Details)
2414404 - Disclosure - Fair Value Measurements - Financial Instruments, Carrying Amount Not Equal to Fair Value (Details)
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2415402 - Disclosure - Derivatives - Narrative (Details)
- R188.htmDerivatives - Energy-Related Derivative Contracts (Details)
2415403 - Disclosure - Derivatives - Energy-Related Derivative Contracts (Details)
- R189.htmDerivatives - Interest Rate Derivatives (Details)
2415404 - Disclosure - Derivatives - Interest Rate Derivatives (Details)
- R190.htmDerivatives - Foreign Currency Derivatives (Details)
2415405 - Disclosure - Derivatives - Foreign Currency Derivatives (Details)
- R191.htmDerivatives - Financial Statement Presentation (Details)
2415406 - Disclosure - Derivatives - Financial Statement Presentation (Details)
- R192.htmDerivatives - Pre-Tax Effects of Unrealized Derivative Gains (Losses) (Details)
2415407 - Disclosure - Derivatives - Pre-Tax Effects of Unrealized Derivative Gains (Losses) (Details)
- R193.htmDerivatives - Pre-Tax Effects of Derivatives Designated as Cash Flow Hedging (Details)
2415408 - Disclosure - Derivatives - Pre-Tax Effects of Derivatives Designated as Cash Flow Hedging (Details)
- R194.htmDerivatives - Pre-Tax Effects of Derivatives Designated as Cash Flow and Fair Value Hedging (Details)
2415409 - Disclosure - Derivatives - Pre-Tax Effects of Derivatives Designated as Cash Flow and Fair Value Hedging (Details)
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2415410 - Disclosure - Derivatives - Cumulative Basis Adjustments for Fair Value Hedges (Details)
- R196.htmDerivatives - Pre-Tax Effects of Derivatives Not Designated as Hedging (Details)
2415411 - Disclosure - Derivatives - Pre-Tax Effects of Derivatives Not Designated as Hedging (Details)
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2416402 - Disclosure - Acquisitions and Dispositions - SO Acquisitions and Dispositions Narrative (Details)
- R198.htmAcquisitions and Dispositions - Acquisitions and Dispositions Table (Details)
2416403 - Disclosure - Acquisitions and Dispositions - Acquisitions and Dispositions Table (Details)
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2416404 - Disclosure - Acquisitions and Dispositions - SPC Acquisitions and Dispositions Narrative (Details)
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2416405 - Disclosure - Acquisitions and Dispositions - Pro Forma Consolidated Information (Details)
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2416406 - Disclosure - Acquisitions and Dispositions - Construction Projects (Details)
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2416407 - Disclosure - Acquisitions and Dispositions - GAS Acquisitions and Dispositions Narrative (Details)
- R203.htmAcquisitions and Dispositions - Held For Sale (Details)
2416408 - Disclosure - Acquisitions and Dispositions - Held For Sale (Details)
- R204.htmAcquisitions and Dispositions - Pre-tax Profit (Details)
2416409 - Disclosure - Acquisitions and Dispositions - Pre-tax Profit (Details)
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2417402 - Disclosure - Segment and Related Information - Narrative (Details)
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2417403 - Disclosure - Segment and Related Information - Financial Data for Business Segments and Products and Services (Details)
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2417404 - Disclosure - Segment and Related Information - Electric Utilities' Revenues (Details)
- R208.htmSegment and Related Information - Gas Revenues (Details)
2417405 - Disclosure - Segment and Related Information - Gas Revenues (Details)
- R209.htmQuarterly Financial Information (Unaudited) (Details)
2418402 - Disclosure - Quarterly Financial Information (Unaudited) (Details)
- R210.htmValuation and Qualifying Accounts (Details)
2419401 - Schedule - Valuation and Qualifying Accounts (Details)