Revenue from Contracts with Customers [Abstract] Revenue from Contracts with Customers [Abstract] Citibank Revolving Credit Facility Citibank Revolving Credit Facility [Member] Citibank Revolving Credit Facility Shareholders of GLOBALFOUNDRIES INC. Other comprehensive income, attributable to owners of parent Non- controlling Interest Non-controlling interests [member] Statement of financial position [abstract] Other noncurrent liabilities Other non-current liabilities Purchases from Purchases of goods, related party transactions Effective income tax rate Tax rate effect from change in tax rate Types of share-based payment arrangements [axis] Types of share-based payment arrangements [axis] Levels of fair value hierarchy [axis] Levels of fair value hierarchy [axis] Disclosure of joint ventures [table] Disclosure of joint ventures [table] Amortization of intangible assets Adjustments for amortisation expense Total comprehensive income (loss) for the period Comprehensive income Research and development expenses Research and development expense Amounts invoiced Current Unbilled Receivables, Amounts Invoiced Current Unbilled Receivables, Amounts Invoiced Purchases of intangible assets Purchase of intangible assets, classified as investing activities Share of profit of joint ventures Share of profit (loss) of joint ventures accounted for using equity method Related party [Abstract] Related party [Abstract] Accumulated deficit Retained earnings Summary of commitments Disclosure of commitments [text block] Related Party Disclosures Disclosure of related party [text block] Advances and proceeds from sale of property, plant and equipment and intangible assets Proceeds from disposals of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets CASH FLOWS FROM INVESTING ACTIVITIES Cash flows from (used in) investing activities [abstract] Statistical Measurement [Domain] Statistical Measurement [Domain] Disclosure of joint ventures [line items] Disclosure of joint ventures [line items] Investments in joint Ventures Disclosure Of Business Combinations And Interest In Other Entities [Text Block] Disclosure Of Business Combinations And Interest In Other Entities Additional Paid-In Capital Additional paid-in capital [member] Borrowings by name [axis] Borrowings by name [axis] Deferred tax assets Deferred tax assets Income Taxes Disclosure of income tax [text block] Commencement period (in years) Share-Based Payment Arrangement, Commencement Period Share-Based Payment Arrangement, Commencement Period Net earnings (loss) per share attributable to the equity holders of the Company: Earnings per share [abstract] Property, plant and equipment, net Property, plant and equipment Weighted average shares outstanding, basic (in shares) Weighted average number of ordinary shares used in calculating basic earnings per share Selling, general and administrative expenses Selling, general and administrative expense Non-controlling interest Non-controlling interests Commencement percentage (as a percent) Share-Based Payment Arrangement, Annual Increase Percentage Share-Based Payment Arrangement, Annual Increase Percentage Provisions Other provisions Cost of revenue Cost of sales Amendment Flag Amendment Flag Profit or loss [abstract] Range [axis] Range [axis] Liabilities [member] Liabilities [member] Net proceeds from borrowings Proceeds from borrowings, classified as financing activities Raw materials and supplies, net Current raw materials Cash and cash equivalents Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Cash and cash equivalents Due within the next 12 months Contractual Capital And Operating Commitments, Current Contractual Capital And Operating Commitments, Current Basic loss per share (in USD per share) Total basic EPS attributable to equity shareholders (in USD per share) Basic earnings (loss) per share Other transactions with Other Purchases Of Goods, Related Party Transactions Other Purchases Of Goods, Related Party Transactions Goodwill and intangible assets, net Intangible assets and goodwill Other receivables Other current receivables Contracts for capital expenditures Contractual capital commitments Income taxes [Abstract] Income taxes [Abstract] Entity's total for joint ventures [member] Entity's total for joint ventures [member] Noncurrent liabilities Non-current liabilities [abstract] Total current assets Current assets Other current financial assets Derivative assets Other current financial assets Bank guarantees Bank Guarantees Bank Guarantees Derivatives Derivatives [member] Voting rights (as a percent) Proportion of voting rights held in joint venture Level 3 Level 3 of fair value hierarchy [member] Effect of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Additional paid-in capital Additional paid-in capital Number of shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Number of shares outstanding CORPORATE INFORMATION Disclosure of notes and other explanatory information [text block] Statement of changes in equity [abstract] Profit (loss) from operations Profit (loss) from operating activities 2018 Tool Equipment Purchase and Lease Financing 2018 Tool Equipment Purchase and Lease Financing [Member] 2018 Tool Equipment Purchase and Lease Financing Other Provisions, Contingent Liabilities, and Contingent Assets [Abstract] Other Provisions, Contingent Liabilities, and Contingent Assets [Abstract] Interests in other entities [Abstract] Interests in other entities [Abstract] Schedule of unbilled accounts receivables Disclosure Of Detailed Information About Activity In Unbilled Accounts Receivables [Table Text Block] Disclosure Of Detailed Information About Activity In Unbilled Accounts Receivables Noncurrent portion of long-term debt Noncurrent total Non-current portion of non-current borrowings Total noncurrent assets Non-current assets Operating expenses Operating expense Disclosure of detailed information about borrowings [table] Disclosure of detailed information about borrowings [table] Marketable securities Marketable Securities, Non-current Marketable Securities, Non-current Disclosure of transactions between related parties [line items] Disclosure of transactions between related parties [line items] Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of contingent liabilities [line items] Disclosure of contingent liabilities [line items] Categories of financial assets [axis] Categories of financial assets [axis] Revenue recognized over time Goods or services transferred over time [member] Inventories Total Current inventories Disclosure of terms and conditions of share-based payment arrangement [line items] Disclosure of terms and conditions of share-based payment arrangement [line items] Repayments of debt and finance lease obligations Payments Of Debt And Finance Lease Obligations Payments Of Debt And Finance Lease Obligations Maximum Maximum [Member] Effective portion of changes in the fair value of cash flow hedges Other comprehensive income, before tax, cash flow hedges Corporate Information And Statement Of IFRS Compliance [Abstract] Corporate Information And Statement Of IFRS Compliance [Abstract] Share-based compensation Adjustments for share-based payments Disclosure Of Financial Assets Disclosure Of Financial Assets [Table Text Block] Disclosure Of Financial Assets Trade and other payables Adjustments for increase (decrease) in trade and other payables Receivables, prepayments and other assets Current prepayments and other current assets Current prepayments and other current assets Current assets: Current: Current assets [abstract] 2019 EUR Dresden Equipment Financing 2019 EUR Dresden Equipment Financing [Member] 2019 EUR Dresden Equipment Financing Document Type Document Type Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Disclosure of fair value measurement of assets and liabilities [table] Entity's total for joint operations [member] Entity's total for joint operations [member] Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] [Line Items] for Disclosure of fair value measurement of assets and liabilities [table] Statutory income tax rate Applicable tax rate Equity Equity [member] SGD EDB Loan SGD EDB Loan [Member] SGD EDB Loan Proceeds from issuance of equity instruments Proceeds from issuance of equity instruments Proceeds from issuance of equity instruments Product and Service [Domain] Product and Service [Domain] Disclosure of detailed information about borrowings [line items] Disclosure of detailed information about borrowings [line items] Attributable to: Comprehensive income attributable to [abstract] Net cash provided by operating activities Cash flows from (used in) operating activities Equity attributable to the shareholders of GLOBALFOUNDRIES INC. Equity attributable to owners of parent Gain on disposal of property, plant and equipment and other Adjustments for gain (loss) on disposals, property, plant and equipment Elimination of reserve upon sale of inventory Inventory Reserve, Current, Elimination Of Reserve Upon Sale Of Inventory Inventory Reserve, Current, Elimination Of Reserve Upon Sale Of Inventory Assets [member] Assets [member] Societe Generale Singapore Revolving Credit Facility(1) Societe Generale Singapore Revolving Credit Facility [Member] Societe Generale Singapore Revolving Credit Facility Document Period End Date Document Period End Date Current portion of long-term debt Various Current portion of non-current borrowings Financial assets, category [member] Financial assets, category [member] Joint operations Joint operations [member] Commitments and Contingencies Disclosure of commitments and contingent liabilities [text block] performance period (in years) Share-Based Payment Arrangement, Performance Period Share-Based Payment Arrangement, Performance Period All levels of fair value hierarchy [member] All levels of fair value hierarchy [member] Total liabilities and equity Equity and liabilities Silicon Manufacturing Partners Pte Ltd. (“SMP”) SMP [Member] SMP Proceeds from sale of marketable securities Proceeds From Sale Of Marketable Securities Proceeds From Sale Of Marketable Securities Non-trade receivables Non-Current Nontrade Receivables Non-Current Nontrade Receivables Total Equity attributable to owners of parent [member] Current portion of deferred income from government grants Current government grants Accounting Policies, Changes In Accounting Estimates And Errors [Abstract] Accounting Policies, Changes In Accounting Estimates And Errors [Abstract] Accounting Policies, Changes In Accounting Estimates And Errors [Abstract] Net cash provided by (used in) financing activities Cash flows from (used in) financing activities Non-controlling interest Profit (loss), attributable to non-controlling interests Shares available (in shares) Share-Based Payment Arrangement, Shares Available Share-Based Payment Arrangement, Shares Available Total current liabilities Current liabilities USD Term Loan A USD Term Loan A [Member] USD Term Loan A Engineering and other pre-fabrication services Engineering And Other Pre-Fabrication Services [Member] Engineering And Other Pre-Fabrication Services Finance expenses, net Adjustments for finance costs Noncurrent portion of lease obligations Non-current lease liabilities Disclosure of terms and conditions of share-based payment arrangement [table] Disclosure of terms and conditions of share-based payment arrangement [table] Disclosure of detailed information about borrowings Disclosure of detailed information about borrowings [text block] Gross profit Gross profit Foreign Currency Translation Reserve Reserve of exchange differences on translation [member] Accounts Receivable Factoring Accounts Receivable Factoring [Member] Accounts Receivable Factoring Level 2 Level 2 of fair value hierarchy [member] Other Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax Unutilized borrowing facilities Undrawn borrowing facilities Purchase of investment in marketable securities Purchase Of Investment In Marketable Securities Purchase Of Investment In Marketable Securities Share of foreign exchange fluctuation reserve of joint ventures Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, before tax EUR Term Loan A EUR Term Loan A [Member] EUR Term Loan A Share-based compensation Increase (decrease) through share-based payment transactions, equity Receivables from related parties Current receivables due from related parties Marketable securities Marketable Securities, Current Marketable Securities, Current ASSETS Assets [abstract] Entity Registrant Name Entity Registrant Name Investment in equity instruments Debt securities [member] Net revenue Revenue Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of disaggregation of revenue from contracts with customers [table] Finance expenses, net Finance costs Due to related parties Amounts payable, related party transactions Statement of cash flows [abstract] Cover [Abstract] Fair value measurements of assets and liabilities [Abstract] Fair value measurements of assets and liabilities [Abstract] Minimum Minimum [Member] Inventories Adjustments for decrease (increase) in inventories Due from related parties Amounts receivable, related party transactions Balance, beginning of period Balance, end of period Investments in joint ventures accounted for using equity method Maximum shares issuable (in shares) Share-Based Payment Arrangement, Maximum Grant Limit Share-Based Payment Arrangement, Maximum Grant Limit Revenue recognized during the period Current Unbilled Receivables, Revenue Recognized During The Year Current Unbilled Receivables, Revenue Recognized During The Year Share-based payment arrangements [Abstract] Share-based payment arrangements [Abstract] Interest and income taxes paid Interest And Income Taxes Paid Interest And Income Taxes Paid Total Loans and borrowings Borrowings Amortization of deferred income from government grants Adjustments For Amortization Of Deferred Income From Government Grants Adjustments For Amortization Of Deferred Income From Government Grants Total liabilities Total financial liabilities Liabilities Mubadala Technology (reimbursement of expenses) Other related parties [member] Loan from Shareholder Loan From Shareholder [Member] Loan From Shareholder Classes of liabilities [axis] Classes of liabilities [axis] Net cash used in investing activities Cash flows from (used in) investing activities Share capital Issued capital Total other comprehensive income (loss) for the period Other comprehensive income that will be reclassified to profit or loss, net of tax Current portion of lease obligations Current lease liabilities Current Fiscal Year End Date Current Fiscal Year End Date Employee Share Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Total noncurrent liabilities Non-current liabilities Components of equity [axis] Components of equity [axis] Risk-free interest rate (as a percent) Risk free interest rate, share options granted PILOT Bonds, Letters Of Credit PILOT Bonds, Letters Of Credit [Member] PILOT Bonds, Letters Of Credit Disclosure of transactions between related parties [table] Disclosure of transactions between related parties [table] 2019 USD Dresden Equipment Financing 2019 USD Dresden Equipment Financing [Member] 2019 USD Dresden Equipment Financing Fair value measurement Disclosure of fair value measurement [text block] Current liabilities: Current liabilities [abstract] Joint ventures [axis] Joint ventures [axis] Contracts for operating expenditures Contractual Operating Commitments Contractual Operating Commitments Noncurrent assets: Non-current: Non-current assets [abstract] Work in progress, net Current work in progress Accumulated Deficit Retained earnings [member] Contractual capital and operating commitments Contractual Capital And Operating Commitments Contractual Capital And Operating Commitments Attributable to: Other comprehensive income [abstract] Repayment of loan from shareholder Increase (Decrease) Through Transactions With Owners, Repayment Of Loan To Shareholder Increase (Decrease) Through Transactions With Owners, Repayment Of Loan To Shareholder Other investing activities Other inflows (outflows) of cash, classified as investing activities Societe Generale Singapore Factoring Societe Generale Singapore Factoring [Member] Societe Generale Singapore Factoring Advances to suppliers Non-current prepayments Purchases of property, plant and equipment Purchase of property, plant and equipment, classified as investing activities LIABILITIES AND EQUITY Equity and liabilities [abstract] Change in assets and liabilities: Change In Assets And Liabilities [Abstract] Change In Assets And Liabilities Provisions Non-current provisions Trade payables and other current liabilities Trade and other current payables Nominal Interest Rate Borrowings, interest rate Net increase/(decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents after effect of exchange rate changes Cash equivalents Cash And Cash Equivalents [Member] Cash And Cash Equivalents [Member] Share of profits for the period Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method Trade receivables, other than related parties Current trade receivables Amounts payable for intangible assets Amounts Payable For Intangible Assets Amounts Payable For Intangible Assets Noncash investing and financing activities: Non-Cash Investing And Financing Activities [Abstract] Non-Cash Investing And Financing Activities BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Disclosure of significant accounting policies [text block] Earnings Per Share Disclosure of earnings per share [text block] Other Other non-current assets Total other comprehensive income (loss) for the period Other comprehensive loss Other comprehensive income Revenue Revenue from contracts with customers Product and Service [Axis] Product and Service [Axis] Borrowings by name [member] Borrowings by name [member] Level 1 Level 1 of fair value hierarchy [member] Amounts payable for property, plant and equipment Amounts Payable For Property, Plant And Equipment Amounts Payable For Property, Plant And Equipment Schedule of related party transactions Disclosure of transactions between related parties [text block] Other(1) Other Undrawn Borrowing Facilities [Member] Other Undrawn Borrowing Facilities Net Revenues Disclosure of revenue from contracts with customers [text block] Other Current Unbilled Receivables, Reclassifications Current Unbilled Receivables, Reclassifications Vesting percentage (as a percent) Share-Based Payment Arrangement, Vesting Percentage Share-Based Payment Arrangement, Vesting Percentage Disclosure of fair value measurement of assets and liabilities Disclosure of fair value measurement of assets [text block] Receivables, prepayments, other assets and other noncurrent assets Adjustments for decrease (increase) in trade and other receivables Statement of comprehensive income [abstract] Number of shares issued (in shares) Number of shares issued Shareholders of GLOBALFOUNDRIES INC. Comprehensive income, attributable to owners of parent Other income (expense), net Other operating income (expense) Items that may be reclassified subsequently to profit or loss: Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] Net income (loss) for the period Net income (loss) Profit (loss) Earnings Per Share Description of accounting policy for earnings per share [text block] Fair value (loss) on investments measured at fair value through other comprehensive income Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax Other noncurrent financial assets Other non-current financial assets Schedule of inventories Schedule Of Inventory, Current [Table Text Block] Schedule Of Inventory, Current Wafer fabrication Water Fabrication [Member] Water Fabrication Timing of transfer of goods or services [member] Timing of transfer of goods or services [member] Trade and other current receivables [abstract] Proceeds from issuance of equity instruments (in shares) Increase (decrease) in number of ordinary shares issued Receivables, prepayments and other assets Total Non-Current Prepayments And Other Current Assets Non-Current Prepayments And Other Current Assets Inventories Disclosure of inventories [text block] Diluted loss per share (in USD per share) Total basic diluted earnings per share attributable to equity shareholders (in USD per share) Diluted earnings (loss) per share Various Loans Two Various Loans Two [Member] Various Loans Two Noncurrent portion of deferred income from government grants Non-current government grants Property, plant and equipment acquired through lease Property, Plant And Equipment Acquired Through Lease Property, Plant And Equipment Acquired Through Lease Schedule of basic and diluted earnings per share Earnings per share [text block] Par value per share (in dollars per share) Par value per share Carrying Amount Financial assets Statistical Measurement [Axis] Statistical Measurement [Axis] CASH FLOWS FROM OPERATING ACTIVITIES Cash flows from (used in) operating activities [abstract] Share-Based Payments Disclosure of share-based payment arrangements [text block] Dividends declared during the period Dividends received Income tax expense Tax expense (income) Receivables, Prepayments and Other Assets Disclosure of trade and other receivables [text block] Entity Central Index Key Entity Central Index Key 2020 USD Equipment Financing 2020 USD Equipment Financing [Member] 2020 USD Equipment Financing Schedule of disaggregation of revenue Disclosure of disaggregation of revenue from contracts with customers [text block] Fair Value Financial assets, at fair value Classes of assets [axis] Classes of assets [axis] Inventories [Abstract] Inventories [Abstract] Income tax effect Income tax relating to components of other comprehensive income that will be reclassified to profit or loss Receivables from government grants Current Receivables From Government Grants Current Receivables From Government Grants Share-based payment arrangements [member] Share-based payment arrangements [member] SMP Joint ventures where entity is venturer [member] Borrowing costs Abstract [Abstract] Borrowing costs [Abstract] Disclosure of contingent liabilities [table] Disclosure of contingent liabilities [table] Expected dividend payment Expected dividend, share options granted Unbilled accounts receivable Balance, beginning of period Balance, end of period Current Unbilled Receivables Current Unbilled Receivables Common Share Issued capital [member] Profit (loss) before income taxes Profit (loss) before tax Timing of transfer of goods or services [axis] Timing of transfer of goods or services [axis] Diluted weighted average common shares outstanding (in shares) Weighted average shares outstanding, diluted (in shares) Weighted average number of ordinary shares used in calculating diluted earnings per share Various Debt One Various Debt One [Member] Various Debt One Disclosure of reconciliation of summarised financial information of joint venture accounted for using equity method to carrying amount of interest in joint venture Disclosure of reconciliation of summarised financial information of joint venture accounted for using equity method to carrying amount of interest in joint venture [text block] Proceeds from issuance of equity instruments and other Proceeds from issuing other equity instruments Equity: Equity [abstract] Shareholders of GLOBALFOUNDRIES INC. Net income (loss) attributable to equity shareholders of the Company Profit (loss), attributable to owners of parent Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments to reconcile profit (loss) [abstract] Total assets Total financial assets Assets Schedule of accounts receivable Disclosure Of Detailed Information About Accounts Receivable [Table Text Block] Disclosure Of Detailed Information About Accounts Receivable Non-controlling interest Comprehensive income, attributable to non-controlling interests Attributable to: Profit (loss), attributable to [abstract] Accumulated other comprehensive loss Accumulated other comprehensive income Long-Term Debt Disclosure of borrowings [text block] Provisions Current provisions Repayments of shareholder loan Repayments Of Shareholder Loans Repayments Of Shareholder Loans Statement of changes in equity [line items] Statement of changes in equity [line items] Entity's total for related parties [member] Entity's total for related parties [member] 2019 Tool Equipment Purchase and Lease Financing 2019 Tool Equipment Purchase and Lease Financing [Member] 2019 Tool Equipment Purchase and Lease Financing Revenue recognized at a point in time Goods or services transferred at point in time [member] Ranges [member] Ranges [member] Long-term debt Long-term borrowings [member] Deferred income taxes, net Adjustments for deferred tax expense Non-controlling interest Other comprehensive income, attributable to non-controlling interests Total equity Beginning balance Ending balance Equity Joint operations [axis] Joint operations [axis] Marketable securities Marketable securities [Member] Marketable securities Categories of related parties [axis] Categories of related parties [axis] Hedging Reserve Reserve of cash flow hedges [member] CASH FLOWS FROM FINANCING ACTIVITIES Cash flows from (used in) financing activities [abstract] Depreciation Adjustments for depreciation expense Attributable to: Comprehensive income [abstract] Statement of changes in equity [table] Statement of changes in equity [table]