Document and Entity Information Document Information [Table] Document Information [Line Items] Document Type Document Quarterly Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS Statement [Table] Statement [Line Items] Revenue from Contract with Customer, Excluding Assessed Tax Net sales (including sales to related parties, see note 5) Net sales Costs and Expenses [Abstract] Operating cost and expenses: Cost of Revenue Cost of sales (exclusive of depreciation, amortization and depletion shown separately below) Cost of sales (exclusive of depreciation, amortization and depletion) Selling, General and Administrative Expense Selling, general and administrative Depreciation, Depletion and Amortization Depreciation, amortization and depletion Exploration Expense Exploration Costs and Expenses Total operating costs and expenses Operating Income (Loss) Operating income Interest Costs Incurred Interest expense Interest Costs Capitalized Adjustment Capitalized interest Investment Income, Interest Interest income Other Nonoperating Income (Expense) Other income (expense) Other income (expense) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income before income taxes Amount of current and royalty income tax expense (benefit) pertaining to income (loss) from continuing operations. Current and Royalty Taxes Income taxes (including royalty taxes, see Note 4) Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments but after income tax. Income (Loss) from Continuing Operations After Income Taxes and Before Income (Loss) from Equity Method Investments Net income before equity earnings of affiliate Income (Loss) from Equity Method Investments Equity earnings of affiliate, net of income tax Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income and comprehensive income Net Income (Loss) Attributable to Noncontrolling Interest Less: Net income attributable to the non-controlling interest Net earnings Net Income (Loss) Available to Common Stockholders, Basic Net income attributable to SCC EARNINGS PER SHARE: Per common share amounts attributable to SCC: Earnings Per Share, Basic Net earnings-basic Common shares-basic (in dollar per share) Earnings Per Share, Diluted Net earnings-diluted Common shares-diluted (in dollar per share) Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding-basic Weighted average common shares outstanding-basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted average shares outstanding-diluted Weighted average common shares outstanding-diluted (in shares) CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] COMPREHENSIVE INCOME: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to the non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to SCC CONDENSED CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalent Cash and cash equivalents Short-Term Investments Short-term investments Total Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable trade Trade receivables Amount, after allowance for credit loss, of right to consideration from customer for other service rendered in normal course of business, classified as current. Accounts Receivable Other Accounts receivable other (including related parties 2026- $10.9 and 2025 - $16.2) Inventory, Net Inventories Total current inventory Prepaid Taxes Prepaid taxes Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property and mine development, net Inventory, Ore Stockpiles on Leach Pads, Gross Ore stockpiles on leach pads Intangible Asset, Including Goodwill, after Accumulated Amortization Intangible assets, net Operating Lease, Right-of-Use Asset Right-of-use assets, net Deferred Income Tax Assets, Net Deferred income tax Equity Method Investments Equity method investment Other Assets, Noncurrent Other non-current assets Assets Total assets Total assets Liabilities [Abstract] LIABILITIES Liabilities: Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable (including related parties 2026- $122.5 and 2025- $138.4) Accrued Income Taxes, Current Accrued income taxes Statutory profit sharing of workers in Peru and Mexico based on a percentage established by law due within one year or within the normal operating cycle if longer. Accrued Workers Participation Accrued workers' participation Interest Payable, Current Accrued interest Operating Lease, Liability, Current Lease liabilities current Other Accrued Liabilities, Current Other accrued liabilities Liabilities, Current Total current liabilities Long-Term Debt, Excluding Current Maturities Long-term debt Operating Lease, Liability, Noncurrent Lease liabilities Deferred Income Tax Liabilities, Net Deferred income taxes Liability for Uncertainty in Income Taxes, Noncurrent Non-current taxes payable Other Liabilities, Noncurrent Other liabilities and reserves Asset Retirement Obligations, Noncurrent Asset retirement obligation Liabilities, Noncurrent Total non-current liabilities Commitments and Contingencies Commitments and contingencies (Note 10) Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] STOCKHOLDERS' EQUITY (NOTE 11) Common Stock, Value, Issued Common stock par value $0.01; shares authorized, 2026 and 2025-2,000; shares issued, 2026 and 2025-884.6 Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Treasury Stock, Value Treasury stock, at cost, common shares Equity, Attributable to Parent Total Southern Copper Corporation stockholders' equity Equity, Attributable to Noncontrolling Interest Balance at the end of the period Balance at the beginning of the period Non-controlling interest Equity, Including Portion Attributable to Noncontrolling Interest Balance at end of year Balance at beginning of year Balance at end of year Balance at beginning of year Total equity Liabilities and Equity Total liabilities and equity Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Affiliated Entity [Member] Affiliates Other Receivables, Net, Current Accounts receivable, related parties Related parties receivable current: Other Liabilities, Current Related parties payable: Accounts payable, related parties Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued (in shares) CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] OPERATING ACTIVITIES Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Adjustments to reconcile net earnings to net cash provided from operating activities: Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Equity earnings of affiliate, net of dividends received Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Loss on foreign currency transaction effect Deferred Income Tax Expense (Benefit) Provision (benefit) for deferred income taxes Other Noncash Income (Expense) Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Change in operating assets and liabilities: Increase (Decrease) in Accounts and Other Receivables Decrease (increase) in trade accounts receivable Increase (Decrease) in Inventories (Increase) decrease in inventories Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (decrease) in accounts payable and accrued liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Increase in other operating assets and liabilities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] INVESTING ACTIVITIES Payments to Acquire Property, Plant, and Equipment Capital expenditures Payments for (Proceeds from) Short-Term Investments Proceeds from (purchase) sale of short-term investments, net Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] FINANCING ACTIVITIES Repayments of Long-Term Debt Repayments of debt Proceeds from Issuance of Debt Proceeds from issuance of debt Payments of Debt Issuance Costs Payments of debt issuance costs Issuance costs Payments of Ordinary Dividends, Common Stock Cash dividends paid to common stockholders Proceeds from (Payment for) Other Financing Activity Other, net Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by (used in) financing activities Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Effect of exchange rate changes on cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents, at end of period Cash and cash equivalents, at beginning of period CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Equity Components [Axis] Equity Component [Domain] Common Stock [Member] CAPITAL STOCK Additional Paid-in Capital [Member] ADDITIONAL PAID-IN CAPITAL Additional Paid-in capital Treasury Stock, Common [Member] TREASURY STOCK Treasury Stock Retained Earnings [Member] RETAINED EARNINGS AOCI Attributable to Parent [Member] ACCUMULATED OTHER COMPREHENSIVE INCOME Parent [Member] STOCKHOLDERS' EQUITY Noncontrolling Interest [Member] NON-CONTROLLING INTEREST Consolidated Entities [Axis] Consolidated Entities [Domain] Parent Company [Member] Parent Company (Grupo Mexico) common shares Southern Copper common shares Represents information pertaining to Grupo Mexico, the holding company of the entity. Parent Company (Grupo Mexico) Parent Company (Grupo Mexico) Parent Company common shares Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Dividends, Common Stock, Cash Dividends declared and paid Value of stock issued to shareholders as a dividend during the period. Stock Issued During Period, Stock Dividend Value Dividends paid in common stock Dividends paid in common stock Stock Issued During Period, Value, Treasury Stock Reissued Used for corporate purposes Used for corporate purposes Represents the value of other activity impacting treasury stock including dividend, interest and foreign currency translation effect. Treasury Stock Value Other Activity Including Dividend, Interest And Foreign Currency Transaction Effect Other activity, including dividend, interest and foreign currency translation effect Other activity, including dividend, interest and foreign currency translation effect Stockholders' Equity, Other Other activity of the period Common Stock, Dividends, Per Share, Cash Paid Cash dividends declared and paid, common stock (in dollars per share) DESCRIPTION OF THE BUSINESS: Nature of Operations [Text Block] DESCRIPTION OF THE BUSINESS: SHORT-TERM INVESTMENTS: Investment in Debt and Equity Securities and Other Trading Assets [Text Block] SHORT-TERM INVESTMENTS: INVENTORIES: Inventory Disclosure [Text Block] INVENTORIES: INCOME TAXES: Income Tax Disclosure [Text Block] INCOME TAXES: RELATED PARTY TRANSACTIONS: Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS: FINANCING: Debt Disclosure [Text Block] FINANCING: LEASES: Lessee, Operating Leases [Text Block] LEASES: ASSET RETIREMENT OBLIGATION: Asset Retirement Obligation Disclosure [Text Block] ASSET RETIREMENT OBLIGATION: BENEFIT PLANS: Retirement Benefits [Text Block] BENEFIT PLANS: COMMITMENTS AND CONTINGENCIES: Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES: STOCKHOLDERS'EQUITY: Equity [Text Block] STOCKHOLDERS'EQUITY: FAIR VALUE MEASUREMENT: Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENT: REVENUE: Revenue from Contract with Customer [Text Block] REVENUE: SEGMENT AND RELATED INFORMATION: Segment Reporting [Text Block] SEGMENT AND RELATED INFORMATION: Earnings Per Share [Text Block] EARNINGS PER SHARE: SUBSEQUENT EVENTS: