Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses and Other Current Liabilities Trade receivables, net Accounts receivable, net Accounts Receivable, Net, Current Accumulated other comprehensive income, beginning of period Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income, end of period Accumulated other comprehensive losses Other Comprehensive Income [Abstract] Accumulated Other Comprehensive Losses [Abstract] Earnings per share of common stock Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Less accumulated depreciation, depletion, amortization and impairment Acquisition of Curragh, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Additional paid-in capital Additional Paid in Capital, Common Stock Capital expenditures Payments To Acquire Productive Assets Loss on disposal of idled asset Gain Loss On Sale Of Other Assets Unrealized loss, net of tax Unrealized Gain Loss On Derivatives Unrealized gain on derivative AmortizationOfFinancingCosts Amortization of deferred financing costs Asset Impairment Charges Impairment of Assets Impairment of assets Total Impairment of assets held for sale Impairment of assets Impairment of Assets [Abstract] Asset Retirement Obligation Asset [Member] Asset Retirement Obligation Current Asset retirement obligations Less current portion Asset Retirement Obligations Noncurrent Asset retirement obligations Asset retirement obligation, excluding current portion Disposal Group, Including Discontinued Operation, Assets, Current Total assets of disposal group Assets held for sale Condensed Consolidated Balance Sheets [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Basic Earnings per share of common stock Interest Paid, Net Cash payments for interest Accounts receivable Increase (Decrease) in Accounts Receivable Reduction in accounts receivable Change in estimate of asset retirement obligation Increase (Decrease) in Asset Retirement Obligations Reclamation of asset retirement obligations Increase (Decrease) in Income Taxes Payable Income tax payable Inventories Increase (Decrease) in Inventories Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase Decrease In Accounts Payable Accounts payable Increase Decrease In Accrued Liabilities Accrued expenses and other current liabilities Cash Collateral for Borrowed Securities Cash Collateral Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock shares issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Common stock $0.01 par value; 1,000,000,000 shares authorized,167,645,373 shares issued and outstanding as of March 31, 2026 and December 31, 2025 Common Stock, Value, Issued Comprehensive Income Net Of Tax Total comprehensive loss attributable to Coronado Global Resources Inc. 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Metallurgical Coal [Member] Metallurgical Coal [Member] Raw coal Raw Coal Raw coal. Saleable coal Saleable Coal Saleable coal. Segment adjusted EBITDA Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization. Consolidated Adjusted EBITDA Thermal Coal [Member] Thermal Coal [Member] Coal Revenues [Member] Coal Revenues From Related Parties [Member] Amortization Of Contract Obligations Amortization of contract obligations Amortization of non-market contracts Current Installments Of Contract Obligation Current portion of non-market contracts. Contract obligations Contract obligations, Current Contract Obligations, Excluding Current Portions Non-Current portion of non-market contracts. Contract obligations Contract obligations, Non-current Increase Decrease In Operating Lease Liabilities Increase Decrease In Operating Lease Liabilities Operating lease liabilities Reconciliation of EBITDA to Net Income Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations Net Of Income Taxes [Table Text Block] Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations Net Of Income Taxes [Table Text Block] Product Groups [Member] Other Products [Member] Other [Member] Plant, Machinery, Mining Equipment And Transportation Vehicles [Member] Accrued Freight Costs Accrued freight costs Accrued Freight Costs Accrued Mining Fees Accrued mining fees Accrued Mining Fees Take-Or-Pay Arrangement Term Take-Or-Pay Arrangement Term Take-or-pay arrangement term Litigation Contingency, Rail Access Entitlement Litigation contingency, rail access entitlement (in MMtpa) Litigation Contingency, Rail Access Entitlement Litigation congtingency, estimate of annual payment Litigation Congtingency, Estimate Of Annual Payment Litigation Congtingency, Estimate Of Annual Payment Litigation congtingency, term of deed Litigation Congtingency, Term of Deed Litigation Congtingency, Term of Deed Litigation contingency, term of rail access entitlement Litigation Contingency, Term Of Rail Access Entitlement Litigation Contingency, Term Of Rail Access Entitlement Rail Links Litigation Versus Aurizon [Member] Other Legal Proceedings [Member] Total Coal Revenue [Member] Acquisition related accruals Acquisition Related Accruals Acquisition Related Accruals Stamp duty payable Stamp Duty Payable Stamp Duty Payable Facility A [Member] Facility B [Member] Bank Guarantees Bank guarantees [Member] Deferred consideration of asset acquired. Deferred consideration liability Deferred Compensation Liabilities Classified Noncurrent Freight Expenses Freight expenses Freight Expenses Cost And Expenses, Rebates Stanwell rebate Cost And Expenses, Rebates Reclamation Of Asset Retirement Obligations Reclamation of asset retirement obligations Reclamation Of Asset Retirement Obligations Facility C [Member] Net Unrealized Gain (Loss) On Cash Flow Foreign Currency Hedge [Member] Accumulated Gain Loss Net Cash Flow Foreign Currency Hedge [Member] Debt instrument term, extension period Debt Instrument Extension Period Debt Instrument Extension Period Debt instrument term, possible repayment or extension period Debt Instrument, Possible Repayment Or Extension Period Debt Instrument, Possible Repayment Or Extension Period Return of capital Return of stockholder other than member capital Return of capital Stockholder other than member capital Amount of cash outflow for debt, and other financial liabilities Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Principal payments on interest bearing liabilities and other financial liabilities Non-current other financial liabilities Other financial liabilities Other Financial Liabilities Noncurrent Reconciliation of Capital Expenditures Reconciliation Of Capital Expenditures [Table Text Block] Reconciliation Of Capital Expenditures [Table Text Block] Depreciation and depletion credit Property, Plant and Equipment, Depreciation And Depletion Credit Property, Plant and Equipment, Depreciation And Depletion Credit Depreciation and depletion Depreciation And Depletion Depreciation and depletion Current lease obligation Present value of lessee's discounted obligation for lease payments from leases, classified as current. Lease liabilities Lease Liability Current Non-current lease obligation Present value of lessee's discounted obligation for lease payments from leases, classified as non-current. Lease liabilities Lease Liability Non-Current Australia Segment [Member] United States Segment [Member] Cost reduction Debt Instrument, Credit Reduction Debt Instrument, Credit Reduction Gain on operating lease derecognition Gain (Loss) On Operating Lease Derecognition Gain (Loss) On Operating Lease Derecognition Losses on idled assets Gain (Loss) On Idled Assets Held For Sale Gain (Loss) On Idled Assets Held For Sale Share-based compensation for equity classified awards Share-based compensation for equity classified awards Amount of decrease to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. Adjustments To Additional Paid In Capital, Share-based Payment Arrangement, Decrease for Cost Recognition Value ABL Facility [Member] Predecessor ABL Facility [Member] ARO Change In Estimate To Underlying Asset Other adjustments ARO Change In Estimate To Underlying Asset EMG [Member] 10.750% Senior Secured Notes Due In 2026 [Member] Senior Secured Notes due 2026 [Member] Senior Secured Notes [Member] Multicurrency Revolving Syndicated Facility [Member] Redemption period Debt instrument, redemption period Debt default, percentage of principal due Debt Instrument, Debt Default, Percentage Of Principal Due Percentage of principal issued Debt Instrument, Percentage of Principal Issued Fixed charge coverage ratio Fixed charge coverage ratio Debt Instrument, Redemption, Change of Control [Member] Debt Instrument, Redemption, Changes in Tax Law [Member] Debt Instrument, Redemption, Period Two Final Maturity Debt Instrument, Final Maturity Debt Instrument, Final Maturity Restricted cash Supplemental Cash Flow Information, Restricted Cash Payment for capital acquired in prior periods Payment for capital acquired in prior periods Payment for capital acquired in prior periods Payment for capital acquired in prior periods Change in enacted tax law Effective Income Tax Rate Reconciliation, Change in Enacted Tax Law, Amount Effective Income Tax Rate Reconciliation, Change in Enacted Tax Law, Amount Swingline loans Swingline loans [Member] Accruals for capital expenditures Net movement in accruals for capital expenditures Accruals For Capital Expenditures Curragh producing mine complex [Member] Producing mine complexes, Buchanan and Logan [Member] Producing mine complexes [Member] Development properties, Mon Valley and Russell County [Member] Acquisition related accruals Acquisition related accruals [Member] Stamp duty on Curragh acquisition Stamp duty on Curragh acquisition [Member] Unpaid tax interest Unpaid tax interest [Member] Discrete tax expense (benefit) Effective Income Tax Rate Reconciliation, Discrete Tax, Amount Effective Income Tax Rate Reconciliation, Discrete Tax, Amount Related Parties Related Parties [Member] Advance payment to acquire long lead capital items Net movement in deposits to acquire long lead capital Advance payment to acquire long lead capital Bank guarantees certain rail and port arrangements Bank guarantees certain rail and port arrangements [Member] Surety bonds Surety bonds Surety Bonds Total finance lease costs Finance lease costs Operating And Finance Lease Obligations Operating And Finance Lease Obligations Total Lease liability Weighted Average Remaining Lease Term (Years) Weighted Average Discount Rate Equipment Embedded Within Mining Service Contracts [Member] Right of use assets derecognized Right of use assets derecognized Lease liabilities derecognized Lease liabilities derecognized Operating lease, not yet commenced, amount Lessee Operating Lease Lease Not Yet Commenced, Amount Lessee Operating Lease Lease Not Yet Commenced, Amount Asset Based Revolving Credit Facility [Member] Leverage ratio Debt Instrument, Leverage Ratio Debt Instrument, Leverage Ratio Interest coverage leverage ratio Debt Instrument, Interest Coverage Leverage Ratio Debt Instrument, Interest Coverage Leverage Ratio Letters of credit outstanding after expiration or termination date Letters Of Credit Outstanding After Expiration Or Termination Date Letters Of Credit Outstanding After Expiration Or Termination Date Long service leave receivable Long Service Leave Receivable, Current Long Service Leave Receivable, Current Tax credits receivable Employment Enhancement Tax Credit, Current, Receivable Employment Enhancement Tax Credit, Current, Receivable Deposits to acquire capital items Deposits To Acquire Capital Items, Current Deposits To Acquire Capital Items, Current Percent of redeemed debt outstanding benchmark Debt Instrument, Percent Of Redeemed Debt Outstanding Benchmark Debt Instrument, Percent Of Redeemed Debt Outstanding Benchmark Delisting or trading halt days, triggering event Debt Instrument, Delisting Or Trading Halt Days, Triggering Event Debt Instrument, Delisting Or Trading Halt Days, Triggering Event Review event period Debt Instrument, Review Event Period Debt Instrument, Review Event Period Bank guarantees amount Debt Instrument, Bank Guarantees Amount Debt Instrument, Bank Guarantees Amount 2027 Take-or-pay arrangements, due within the next year Future Minimum Royalties Due In Two Years Future Minimum Royalties Due In Three Years 2028 Future Minimum Royalties Due In Three Years Future Minimum Royalties Due In Four Years 2029 Future Minimum Royalties Due In Four Years Future Minimum Royalties Due In Five Years 2030 Future Minimum Royalties Due In Five Years Future Minimum Royalties Due Thereafter Thereafter Future Minimum Royalties Due Thereafter Future Minimum Royalties Due Total Take-or-pay arrangements, total Future Minimum Royalties Due 2026 Future Minimum Royalties Due, Next Twelve Months Future Minimum Royalties Due, Next Twelve Months CDIs [Member] Series A Share [Member] Membership Interest Purchase Agreement [Member] Coronado Group LLC [Member] Termination Fee Revenue Termination fee revenue Termination Fee Revenue Taxation Administration Act 2002, Total Assessed Stamp Duty, Amount Taxation Administration Act 2002, Total Assessed Stamp Duty, Amount Taxation Administration Act 2002, total assessed stamp duty, amount Taxation Administration Act 2002, Total Assessed Stamp Duty Unpaid Interest, Amount Taxation Administration Act 2002, Total Assessed Stamp Duty Unpaid Interest, Amount Taxation Administration Act 2002, total assessed stamp duty unpaid interest, amount Other Non-Cash Adjustments Other Non-Cash Adjustments Other non-cash adjustments Number of extinguished terminal service contracts Number Of Extinguished Terminal Service Contracts Number Of Extinguished Terminal Service Contracts Common stock conversion basis Common Stock Conversion Basis1 Common Stock Conversion Basis1 Loan - Curragh Housing Agreement [Member] Summary of Other Financial Liabilities Other Financial Liabilities [Table Text Block] Other Financial Liabilities [Table Text Block] Other Financial Liabilities Current Other Financial Liabilities Current Less: current portion Financial liability, current Other current financial liabilities Other Financial Liabilities [Abstract] Other Financial Liabilities Other Financial Liabilities Disclosure [Text Block] Other Financial Liabilities Disclosure [Text Block] Number of extinguished mining services contracts Number Of Extinguished Mining Services Contracts Number Of Extinguished Mining Services Contracts The cash inflow from interest bearing liabilities and other financial liabilities Proceeds from interest bearing liabilities and other financial liabilities Proceeds From Interest Bearing Liabilities And Other Financial Liabilities Number of modified mining equipment lease contracts Operating Lease, Number Of Modified Leases Contracts Operating Lease, Number Of Modified Leases Contracts Modified Mining Equipment Lease Contracts [Member] 9.250% Senior Secured Notes Due In 2029 [Member] Percent of redeemed outstanding amount, from change of control scenario Debt Instrument, Percent Of Redeemed Outstanding Amount, From Change Of Control Scenario Debt Instrument, Percent Of Redeemed Outstanding Amount, From Change Of Control Scenario Debt Instrument, Redemption, One Or More Occasions Prior To October 1, 2026 [Member] Percent of aggregate principal amount of debt issued under the indenture remains outstanding after each such redemption Debt Instrument, Percent Of Aggregate Principal Amount Of Debt Issued Under The Indenture Remains Outstanding After Each Such Redemption Debt Instrument, Percent Of Aggregate Principal Amount Of Debt Issued Under The Indenture Remains Outstanding After Each Such Redemption Debt Instrument, Period After Date Of Closing For Redemption Purposes Debt Instrument, Period After Date Of Closing For Redemption Purposes Period after date of closing for redemption purposes Debt Instrument, Events Of Default, Percent Of Holders Of Aggregate Principal Amount Debt Instrument, Events Of Default, Percent Of Holders Of Aggregate Principal Amount Events of default, percent of holders of aggregate principal amount Operating Lease Right Of Use Asset Amount Modified Operating Lease Right Of Use Asset Amount Modified Operating lease right of use asset amount modified Operating Lease Liabilities Amount Modified Operating Lease Liabilities Amount Modified Operating lease liabilities amount modified Mining Costs Mining Costs Mining costs Other And Unallocated Items Other And Unallocated Items Other and unallocated costs O 2025 Q1 Dividends [Member] Chess Depositary Interests [Member] Debt Agreement, Required Aggregate Cash Balance Debt Agreement, Required Aggregate Cash Balance Required aggregate cash balance Debt Instrument, Defer Financial Covenants Test Period Debt Instrument, Defer Financial Covenants Test Period Defer financial covenants test period Finance Lease Liability Incurred During Period Finance Lease Liability Incurred During Period Finance lease liability Current Assets Net Current Assets Net Current assets, net Going Concern, Net Losses Going Concern, Net Losses Net losses Debt Agreement, Required Cash Collateralization Amount Debt Agreement, Required Cash Collateralization Amount Required cash collateralization amount, debt agreement covenants Capital Expenditures, Total Capital Expenditures, Total Capital expenditures Capital expenditures per segment detail Capital Acquired Through Finance Lease Capital acquired through finance leases Capital acquired through finance lease Available Liquidity Aggregate sources of liquidity Aggregate sources of liquidity Line Of Credit, Percent Of Drawn In Which Covenants Apply Line Of Credit, Percent Of Drawn In Which Covenants Apply Percent of drawn an which covenants apply Other Financial Liabilities Debt Issuance Cost Other Financial Liabilities Debt Issuance Cost Debt issuance costs Other Financial Liabilities Total other financial liabilities Total other financial liabilities Total other financial liabilities Payable To Third-Party Financing Companies [Member] Other Financial Liabilities Gross Carrying Amount Collateralized financial liabilities Collateralized financial liabilities Contract Obligation, Prepayment Future Coal Sales Contract Obligation, Prepayment Future Coal Sales Prepayment future coal sales Debt Instrument, Review Event Period, Delisting Period Debt Instrument, Review Event Period, Delisting Period Review event period, delisting period Debt Instrument, Review Event Period, Possible Prepayment Period Debt Instrument, Review Event Period, Possible Prepayment Period Review event period, possible prepayment period Stanwell Liabilities [Abstract] Contract Obligations Disclosure [Text Block] Contract Obligations Disclosure [Text Block] Stanwell Liabilities Schedule Of Contract Obligations [Table Text Block] Schedule Of Contract Obligations [Table Text Block] Schedule of Contract Obligations Contract Obligations [Line Items] Contract Obligations [Table] Stanwell Reserve Area Deferred Consideration [Member] Stanwell Prepaid Coal Supply Liability [Member] Amount Of Near Term Liquidity Provided From Agreement Amount of near-term liquidity provided from agreement Amount Of Near Term Liquidity Provided From Agreement Thermal Coal Discount From Agreement Thermal Coal Discount From Agreement Thermal coal amount discount from agreement Prepayment, Discount Period Prepayment, Discount Period Prepayment, discount period Prepaid Coal Supply Liability Interest Rate Prepaid coal supply liability interest rate Prepaid Coal Supply Liability Interest Rate Estimated Value Of Rebate Estimated Value Of Rebate Estimated value of rebate Stanwell Below Market Coal Supply Agreement [Member] Contract Liability Contract Liability Contract obligations Non Market Portion Of Coal Leases Non Market Portion Of Coal Leases Non-market portion of coal leases Coal Delivery Period Coal Delivery Period Coal delivery period Credit Facility, Availability Period Credit Facility, Availability Period Credit facility, availability period Period In Which Borrowings Are Subject To An Interest Make-Whole Premium Period In Which Borrowings Are Subject To An Interest Make-Whole Premium Period in which borrowings are subject to an interest make-whole premium Other Financing Costs Other Financing Costs Other financing costs Unsecured Notes Payable To Insurance Premium Finance Company [Member] Estimated Rehabilitation Cost Estimated Rehabilitation Cost Estimated rehabilitation cost Contribution Percent Allowed Of Estimated Rehabilitation Cost Contribution Percent Allowed Of Estimated Rehabilitation Cost Contribution percent allowed of estimated rehabilitation cost Proposed Transaction [Member] Percent Of Difference Between Current Contracted Prices And Calculated Market Price Equivalent Percent Of Difference Between Current Contracted Prices And Calculated Market Price Equivalent Percent of difference between current contracted prices and calculated market price equivalent Liquidity Benchmark Under Agreement Liquidity Benchmark Under Agreement Liquidity benchmark under agreement Percent Applied To Additional Prepayment Of Price Difference Percent Applied To Additional Prepayment Of Price Difference Percent applied to additional prepayment of price difference Scenario One [Member] Scenario Two [Member] Accumulated Prepayment Amount, Interest Rate Accumulated Prepayment Amount, Interest Rate Accumulated prepayment amount, interest rate Accrued Interest Amount, Capped Benchmark Accrued Interest Amount, Capped Benchmark Accrued interest amount, capped benchmark Scenario Three [Member] Percent Of Disposed Controlling Interest Benchmark In Agreement Percent Of Disposed Controlling Interest Benchmark In Agreement Percent of disposed controlling interest benchmark in agreement Scenario Four [Member] Maximum Discount To Market Percent Under Agreement Maximum Discount To Market Percent Under Agreement Maximum discount to market percent under agreement Idle Mine Complex [Member] Idle mine complex [Member] Receivable From Agreement Receivable From Agreement Stanwell receivable Minimum Threshold For Review Events Minimum Threshold For Review Events Minimum threshold for review events Contract Obligation That Includes Deferred Consideration, Supply Liability, And Prepayment And Deferred Payment Contract Obligation That Includes Deferred Consideration, Supply Liability, And Prepayment And Deferred Payment Stanwell liabilities Stanwell Prepayment And Deferred Payment [Member] Contractual Pre-Tax Discount Rate Contractual Pre-Tax Discount Rate Contractual pre-tax discount rate Liquidity Benchmark For Prepayments Liquidity Benchmark For Prepayments Liquidity benchmark for prepayments Second Amendment Deed [Member] Range Of Broader Annual Nominations Range Of Broader Annual Nominations Range of broader annual nominations Liquidity Benchmark For Prepayment Settlement Liquidity Benchmark For Prepayment Settlement Liquidity benchmark for prepayment settlement Prepayment And Deferred Payment Balance Interest Rate Prepayment And Deferred Payment Balance Interest Rate Prepayment and deferred payment balance interest rate Accrued Interest Amount Capped Percent Accrued Interest Amount Capped Percent Accrued interest amount capped percent Cumulative Rebate Amount Cumulative Rebate Amount Cumulative rebate amount Cash Liquidity Benchmark For Distributions Cash Liquidity Benchmark For Distributions Cash liquidity benchmark for distributions Change Of Control Provision Change Of Control Provision Change of control provision Control Of Interest Percent Disposed To Trigger Payout In Agreement Control Of Interest Percent Disposed To Trigger Payout In Agreement Control of interest percent disposed to trigger payout in agreement Logan Mining Property [Member]