Amendment Description Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity [Domain] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Legal Entity [Axis] Accounts Receivable, Net, Current Receivables, net of allowance for uncollectible accounts of $6 and $9 Receivables, net of allowance for uncollectible accounts of $3 and $3 Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Nonutility property, accumulated depreciation Amortization Allowance for Doubtful Accounts Receivable, Current Receivables, allowance for uncollectible accounts Asset retirement obligations and related funding Asset Retirement Obligations, Noncurrent Asset retirement obligations CONDENSED CONSOLIDATED BALANCE SHEETS Basis swap Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents, January 1 Cash and Cash Equivalents, June 30 Cash and cash equivalents Interest Paid, Net Cash paid for - Interest (net of capitalized interest of $5 and $5) Cash paid for - Interest (net of capitalized interest of $4 and $5) Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepayments and other Increase (Decrease) in Receivables Receivables Proceeds from (Repayments of) Short-term Debt Short-term borrowings, net Increase (Decrease) in Accounts Payable Accounts payable Commercial Paper. Outstanding commercial paper (270 or fewer days) Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income attributable to SCANA Corporation Fuel Costs Cost of Purchased Oil and Gas Gas purchased for resale Cost of Purchased Power Current Liabilities: Liabilities, Current [Abstract] Liabilities, Current Total Current Liabilities Customer Advances and Deposits, Current Customer deposits and customer prepayments Debt Disclosure [Text Block] LONG-TERM DEBT AND LIQUIDITY Debt Instrument, Face Amount Face value of Industrial Revenue Bonds issued, proceeds of which were availed as loan Debt Instrument, Interest Rate, Stated Percentage Stated interest rate (as a percent) Debt Instruments [Abstract] Long-term Debt Debt Instrument [Axis] Debt Instrument [Line Items] Long-term Debt and Liquidity Schedule of Long-term Debt Instruments [Table] Assets held in trust, net-nuclear decommissioning Decommissioning Fund Investments Assets held in trust, net - nuclear decommissioning Deferred Income Tax Expense (Benefit) Deferred income taxes, net Accumulated deferred income taxes Depreciation, Amortization and Accretion, Net Depreciation and amortization Derivative Assets Derivative, by Nature [Axis] Derivative Instruments and Hedging Activities Disclosure [Text Block] DERIVATIVE FINANCIAL INSTRUMENTS Derivative [Line Items] Natural Gas Derivative Contracts and Interest Rate Swaps Outstanding Fair value of energy-related derivatives and interest rate derivatives Derivative [Table] Earnings Per Share, Diluted Diluted Earnings Per Share of Common Stock (in dollars per share) Electric Revenue Electric Energy Related Inventory Fuel and gas supply Environmental remediation costs Assets Held-in-trust CONDENSED CONSOLIDATED STATEMENTS OF INCOME INCOME TAXES Income Tax Disclosure [Text Block] Income Taxes Paid, Net Cash paid for - Income taxes Increase (Decrease) in Other Operating Assets Changes in other assets Interest Expense Interest charges, net of allowance for borrowed funds used during construction of $3, $3, $5 and $5 Interest charges, net of allowance for borrowed funds used during construction of $3, $3, $4 and $5 Derivative financial instruments Interest Rate Cash Flow Hedge Liability At Fair Value Interest Rate Derivative Assets, at Fair Value Interest rate contracts Interest Rate Derivative Liabilities, at Fair Value Interest rate contracts Inventories (at average cost): Inventory, Net [Abstract] Other Inventory, Supplies Materials and supplies Nuclear electric generation units Capitalization and Liabilities Liabilities and Stockholders' Equity [Abstract] Liabilities and Stockholders' Equity Total Line of Credit Facility, Amount Outstanding LOC advances Line of Credit Facility, Maximum Borrowing Capacity Committed long-term line of credit, Total Line of Credit Facility, Remaining Borrowing Capacity Available amount under lines of credit Line of Credit Facility [Abstract] Lines of credit: Line of Credit Facility [Axis] Long-term Debt, Current Maturities Current portion of long-term debt Long-term Debt, Excluding Current Maturities Long-Term Debt, net Loss Contingencies [Line Items] Commitments and contingencies Net Cash Provided by (Used in) Financing Activities Net Cash Provided From (Used For) Financing Activities Net Cash Provided by (Used in) Investing Activities Net Cash Used For Investing Activities Net Cash Provided by (Used in) Operating Activities Net Cash Provided From Operating Activities Net Income (Loss) Available to Common Stockholders, Basic Income Available to Common Shareholders of SCANA Income Available to Common Shareholders Net Income Cash and Cash Equivalents, Period Increase (Decrease) Net Increase (Decrease) In Cash and Cash Equivalents Nonoperating Income (Expense) Total Other Expense Deferred Credits and Other Liabilities: Liabilities, Noncurrent [Abstract] Liabilities, Noncurrent Total Deferred Credits and Other Liabilities Nonmonetary Notional Amount of Price Risk Cash Flow Hedge Derivatives Commodity and other energy management contracts designated as cash flow hedges (in DT) Nonmonetary Notional Amount of Price Risk Derivative Instruments Not Designated as Hedging Instruments Commodity and other energy management contracts not designated as hedges (in DT) Nonmonetary Notional Amount of Price Risk Derivatives Commodity and other energy management contracts (in DT) Notional Amount of Interest Rate Cash Flow Hedge Derivatives Aggregate notional amount of interest rate swaps designated as cash flow hedge (in dollars) Notional Amount of Interest Rate Fair Value Hedge Derivatives Aggregate notional amount of interest rate swaps designated as fair value hedge (in dollars) Operating Income (Loss) Operating Income Operating Income Operating Revenues: Revenues [Abstract] Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Losses on cash flow hedging activities Gain (Loss) Reclassified from Accumulated OCI into Income, net of tax (Effective Portion) Other Assets, Current Prepayments and other Other Inventory Emission allowances Other Long-term Investments Other investments Other Nonoperating Expense Other expenses Other Nonoperating Income Other income Other Postretirement Benefits Payments to Acquire Other Property, Plant, and Equipment Nonutility property additions Payments of Dividends Dividends Payments for Repurchase of Equity Redemption/Repurchase of Equity Securities Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE BENEFIT PLANS Pension Benefits Defined Benefit Plan, Expected Return on Plan Assets Expected return on assets Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit cost Defined Benefit Plan, Service Cost Service cost Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plan Disclosure [Line Items] Pension and Other Postretirement Benefit Plans Schedule of Defined Benefit Plans Disclosures [Table] Price Risk Derivative Assets, at Fair Value Commodity contracts Price Risk Derivative Liabilities, at Fair Value Commodity contracts Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Property, Plant and Equipment, Net Nonutility property, net of accumulated depreciation of $127 and $118 Nonutility property, net of accumulated depreciation RATE AND OTHER REGULATORY MATTERS Public Utilities Disclosure [Text Block] Public Utilities, Property, Plant and Equipment, Amount of Construction Work in Process Included in Rate Base Construction Work in Progress Public Utilities, Property, Plant and Equipment, Plant Acquisition Adjustments for Intangible Utility Plants Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Accumulated Depreciation and Amortization Public Utilities, Property, Plant and Equipment, Plant in Service Utility Plant In Service Payments to Acquire Investments Purchase of investments Payments to Acquire Property, Plant, and Equipment Utility property additions and construction expenditures Inventory, Raw Materials and Supplies Regulated Operating Revenue, Gas Gas - regulated Gas Regulated and Unregulated Operating Revenue Total Operating Revenues External Revenue Regulatory Asset [Axis] Deferred employee benefit plan costs Regulatory Assets, Noncurrent Regulatory assets Regulatory assets, expected recovery period (in years) Regulatory Noncurrent Asset, Amortization Period Regulatory Liability, Noncurrent Regulatory liabilities Related Party Transactions Disclosure [Text Block] AFFILIATED TRANSACTIONS Repayments of Long-term Debt Repayment of long-term debt Schedule of Line of Credit Facilities [Table Text Block] Schedule of line of credit facilities