Accumulated Depreciation [Member] Additions Additions other than through business combinations, property, plant and equipment Expenses [Abstract] Total assets Assets Assets Segment assets [Abstract] Assets [abstract] Cash at bank Bank charges Bank and similar charges Basic earnings per share (in dollars per share) Loan amount Minimum [Member] Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Carrying amount [member] Cash and cash equivalents at the end of the period Cash and cash equivalents at the beginning of the period Cash and cash equivalents Cash and cash equivalents Current assets - cash and cash equivalents [Abstract] Net cash from financing activities Cash flows from (used in) financing activities Cash flows from financing activities Net cash used in investing activities Cash flows from (used in) investing activities Cash flows from investing activities Net cash used in operating activities Cash flows from (used in) operating activities Cash flows from operating activities Changes in equity Changes in equity [abstract] Employee benefits expensed [abstract] Classes of employee benefits expense [abstract] Classes of property, plant and equipment [axis] Classes of property, plant and equipment [domain] Components of equity [axis] Components of equity [domain] 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] Total comprehensive income for the period Comprehensive income Total comprehensive income for the period attributable to the owners of ioneer Limited Comprehensive income, attributable to owners of parent Counterparties [axis] Counterparties [domain] Accrued expenses Total current assets Current assets Current assets Current assets [abstract] Lease liabilities Current lease liabilities Total current liabilities Total current liabilities Current liabilities Current liabilities Current liabilities - payables [Abstract] Current liabilities [abstract] Prepayments Current prepayments Provisions Current provisions Current liabilities - provisions [Abstract] Provisions for employee benefits Depreciation and amortisation Depreciation expense Depreciation, property, plant and equipment Diluted earnings per share (in dollars per share) Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [table] Basis of preparation and Material accounting policies Disclosure of basis of preparation of financial statements [text block] Current assets - cash and cash equivalents Disclosure of cash and cash equivalents [text block] New or amended Accounting Standards and Interpretations Disclosure of changes in accounting policies [text block] Contingent liabilities [Abstract] Disclosure of contingent liabilities [abstract] Disclosure of contingent liabilities [line items] Disclosure of contingent liabilities [table] Employee benefits expensed [Abstract] Non-Current Assets - Property, Plant and Equipment Disclosure of detailed information about property, plant and equipment [text block] Equity - dividends Disclosure of dividends [text block] Employee benefits expensed Disclosure of employee benefits [text block] Operating segments Disclosure of entity's operating segments [text block] Events after the reporting period Non-current assets - exploration and evaluation Net Finance Income Disclosure of finance income (cost) [text block] Net finance income Financial risk management [Abstract] Financial risk management Issued Capital Disclosure of issued capital [text block] Events after the reporting period [Abstract] Operating segments [Abstract] Segment Information Disclosure of operating segments [line items] Disclosure of operating segments [table] Non-Current Assets - Other Other Expenses Disclosure of other operating expense [text block] Contingent assets and liabilities Non-current assets - property, plant and equipment [Abstract] Non-current assets - property, plant and equipment Disclosure of detailed information about property, plant and equipment [line items] Disclosure of detailed information about property, plant and equipment [table] Current liabilities - provisions Disclosure of provisions [text block] Equity - issued capital Dividends paid Dividends paid, ordinary shares Dividends declared Earnings per share Effects of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Total employee benefit expense Employee benefits expense Employee benefits expense Total equity Ending balance Beginning balance Equity Equity Equity [abstract] Contingent liabilities Expenses Share-based payments Finance costs Finance costs Finance costs Finance income Finance income Net finance income Net financing (expense)/income General and administration expenses Plant and Equipment - Right-of-use [Member] Gross carrying amount [member] Statement of profit or loss and other comprehensive income [Abstract] Income tax expense Tax expense (income) Net increase/(decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Share-based payments expensed/capitalised Increase (decrease) through share-based payment transactions, equity Transfers in/(out) Lease interest Interest expense on lease liabilities Interest received Interest revenue calculated using the effective interest method Issued capital Balance at the beginning of the period Balance at the end of the financial period Capital amount Issued capital [Member] Issued capital [member] Leasehold Improvements [Member] Total liabilities Liabilities Liabilities Segment liabilities [Abstract] Liabilities [abstract] Net assets Assets (liabilities) Net foreign exchange gain Net foreign exchange gain Total non-current assets Non-current assets Non-current assets Non-current assets [abstract] Lease liabilities Non-current lease liabilities Total Non-current liabilities Total non-current liabilities Non-current liabilities Non-current liabilities Non-current liabilities [abstract] Payables Trade and other non-current payables Receivables Trade and other non-current receivables Principal amount Number of shares issued [abstract] Balance at the end of the financial period (in shares) Balance at the beginning of the period (in shares) Ordinary shares - fully paid (in shares) Operating Segments [Member] Operating segments [member] Other assets Other comprehensive income for the period, net of tax Other comprehensive income Other comprehensive income Other comprehensive income [abstract] Foreign currency translation Foreign currency translation differences Other debtors Other expenses Other expense, by function Total other expenses Other expenses, by nature Other Other expenses Reserves Transaction costs related to issues of equity securities Payments for share issue costs Repayment of lease liabilities Payments of lease liabilities, classified as financing activities Payments to suppliers and employees Payments to suppliers for goods and services and to and on behalf of employees Proceeds from issue of shares Consulting and professional costs Loss before income tax Loss after income tax expense for the period Profit (loss) Loss after income tax expense for the period attributable to the owners of ioneer Limited Profit (loss), attributable to owners of parent Loss before income tax expense Profit (loss) before tax Property, plant and equipment Closing balance Plant and equipment Opening balance Property, plant and equipment Plant and equipment [Abstract] Plant and Equipment [Member] Property, plant and equipment [member] Expenditure on exploration and evaluation Purchase of mining assets Payments for plant and equipment Purchase of property, plant and equipment, classified as investing activities Range [axis] Range [domain] Reconciliation of written down [Abstract] Reconciliations of written down [Abstract] Reconciliation of changes in property, plant and equipment [abstract] Reconciliation of movement [Abstract] Reconciliation of number of shares outstanding [abstract] Foreign currency translation reserve [Member] Reserve of exchange differences on translation [member] Equity compensation reserve [Member] Reserve of share-based payments [member] Accumulated losses Accumulated losses [Member] Retained earnings [member] Revenues Revenue Interest income from external parties Right-of-use assets Right-of-use assets Segment consolidation items [axis] Segment consolidation items [domain] Share issue costs from capital raise Share issue costs from capital raise (Note 13) Share issue related cost Cash on deposit Employee benefits expense Short-term employee benefits expense Statement of cash flows [Abstract] Statement of changes in equity [Abstract] Statement of changes in equity [line items] Statement of changes in equity [table] Statement of financial position [Abstract] Exploration and evaluation Exploration assets Opening balance Ending balance Exploration assets Rhyolite Ridge [Member] Maximum [Member] Payables Payables Trade and other current payables Current liabilities - payables [Abstract] Trade payables Current trade payables Receivables Total current receivables Trade and other current receivables Current assets - receivables [Abstract] Transfers into Level 3 of fair value hierarchy, assets Transfers into Level 3 of fair value hierarchy, liabilities Transfers into Level 3 of fair value hierarchy, liabilities Transfers out of Level 1 into Level 2 of fair value hierarchy, assets Transfers out of Level 1 into Level 2 of fair value hierarchy, liabilities Transfers out of Level 1 into Level 2 of fair value hierarchy, liabilities held at end of reporting period Transfers out of Level 2 into Level 1 of fair value hierarchy, assets Transfers out of Level 2 into Level 1 of fair value hierarchy, liabilities Transfers out of Level 3 of fair value hierarchy, assets Transfers out of Level 3 of fair value hierarchy, assets Transfers out of Level 3 of fair value hierarchy, liabilities Plant and equipment useful life Cover [Abstract] Document Type Amendment Flag Document Period End Date Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Geographical [Domain] Geographical [Axis] North America [Member] Australia [Member] Equity - dividends [Abstract] The increase (decrease) in equity resulting from the performance rights vested. Increase (decrease) through performance rights vested Performance rights vested The shares issued as part of a capital raise transaction. Share issue from capital raise, shares Share issue from capital raise (in shares) Number of votes by members present in meeting or by proxy. Number of votes by member or proxy Number of votes by member or proxy Number of share schemes in operation. Number of share schemes Number of share schemes The increase (decrease) in equity shares resulting from the performance rights vested. Increase (decrease) through performance rights vested, shares Performance rights vested (in shares) Number of votes per in meeting. Number of votes per share Number of votes per share Number of share issued as a result of stock option exercised during a period. Share issued, stock option exercised Stock option exercised (in shares) The number of progress payments made to Boundary Peak under the agreement. Number of progress payments made Number of progress payments made The name of an entity. Boundary Peak Minerals LLC [Member] Boundary Peak Minerals LLC [Member] The amount of contingent liability settlement amount to be payable on settlement. Contingent liability settlement payable amount Contingent liability settlement payable amount The exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Exchange rate Exchange rate The term of current payables, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Current payables, term Current liability term period The description of the entity's accounting policy for the corporate information. Description of accounting policy for corporate information [Text Block] Corporate information The description of the entity's accounting policy for the basis of preparation. Description of accounting policy for basis of preparation [Text Block] Basis of preparation The description of the entity's accounting policy for the change in fiscal year. Description of accounting policy for change in fiscal year [Text Block] Change in fiscal year The amount of shares issued from capital raise. Shares issued from capital raise Share issue from capital raise Share issued from capital raise (Note 13) The increase (decrease) in equity resulting from the performance rights vested. Increase (decrease) through performance rights vested, equity Fair value of performance rights vested (Note 13) The disclosure of detailed information about trade and other current payables. Disclosure of detailed information about trade and other current payables [Table Text Block] Current Liabilities - Payables The entire disclosure for trade and other current payables. Disclosure of trade and other current payables [Text Block] Current liabilities - payables The amount of additions to tangible exploration and evaluation assets. Additions of tangible exploration and evaluation assets Additions - Rhyolite Rydge The amount of non core exploration and evaluation expenditure. Exploration expenditure - non core Exploration expenditure - noncore The disclosure for exploration and evaluation assets. Disclosure of exploration and evaluation assets [Table Text Block] Non-Current Assets - Exploration and Evaluation Non-current assets - exploration and evaluation [Abstract] Basis of Preparation and Material Accounting Policies [Abstract] The disclosure of detailed information about trade and other current receivables. Disclosure of detailed information about trade and other current receivables [Table Text Block] Current Assets - Receivables The entire disclosure for trade and other current receivables. Disclosure of trade and other current receivables [Text Block] Current assets - receivables The amount of fees paid or payable to Non-executive directors. Non-executive director fees Non-executive director fees The amount of fees paid or payable to executive directors. Executive director fees Executive director fees The number of major customers of the entity. Number of major customers The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment and other expenses. Employee benefits expense and other expenses Employee benefits and other expenses The amount of current provisions, including provisions for employee benefits. [Refer: Provisions] Current provision Provisions The amount of current trade payables and current other payables and the amount of lease liabilities. Payables Payables Segment information [Abstract] Segment information [Abstract] The disclosure of movements in issued ordinary share capital. Disclosure of movements in ordinary share capital [Table Text Block] Movement in Ordinary Share Capital The tabular disclosure of expenses recognized for employee benefits. Disclosure of employee benefits expense [Table Text Block] Employee Benefits Expensed Equity - issued capital [Abstract] Amount of interest capitalized during the period. Interest cost capitalized Capitalized interest Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements. Unamortized loan fees Unamortized loan fees The maturity period of borrowings, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Borrowings maturity period Loan term The disclosure of detailed information about cash and cash equivalents. Disclosure of cash and cash equivalents [Table Text Block] Cash and Cash Equivalents Net finance income [Abstract] The entire disclosure for expenses. Expenses [Text Block] Expenses The disclosure of other non-current financial assets. Other non current financial assets [Text Block] Non-current assets - other Non-current assets - other [Abstract] Contingent assets and liabilities [Abstract] The disclosure of detailed information about current provisions. Disclosure of detailed information about current provisions [Table Text Block] Current Liabilities - Provisions