The amount of additional shares.

No definition available.

Name:	crml_AdditionalShares
Namespace Prefix:	crml_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the value of certain costs.

+ References

No definition available.

+ Details

Name:	crml_CertainCosts
Namespace Prefix:	crml_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the value of interest free loan arrangement.

+ References

No definition available.

+ Details

Name:	crml_InterestFreeLoanArrangementAmount
Namespace Prefix:	crml_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Issued capital rate.

+ References

No definition available.

+ Details

Name:	crml_IssuedCapitalRate
Namespace Prefix:	crml_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Premium vested options.

+ References

No definition available.

+ Details

Name:	crml_PremiumVestedOptions
Namespace Prefix:	crml_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of purchases of acquisition.

+ References

No definition available.

+ Details

Name:	crml_PurchasesOfAcquisition
Namespace Prefix:	crml_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represent the amount of capital contributions.

+ References

No definition available.

+ Details

Name:	crml_ReceivedCapitalContributions
Namespace Prefix:	crml_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The per share of share issued price per share.

+ References

No definition available.

+ Details

Name:	crml_ShareIssuedPricePerShare
Namespace Prefix:	crml_
Data Type:	dtr:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares revised.

+ References

No definition available.

+ Details

Name:	crml_SharesRevised
Namespace Prefix:	crml_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the value of supplementary financing.

+ References

No definition available.

+ Details

Name:	crml_supplementaryFinancing
Namespace Prefix:	crml_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 1
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2025-en-r&anchor=para_31_b&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_DeemedCostOfInvestmentsForWhichDeemedCostIsFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 106
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_106_d&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_NumberOfSharesIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares issued by the entity, for which full payment has been received.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B10
-Subparagraph a
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B10_a_ii&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 160
-Subparagraph a
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_160_a_ii&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 79
-Subparagraph a
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_79_a_ii&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_NumberOfSharesIssuedAndFullyPaid
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of current payables due to related parties. [Refer: Total for all related parties [member]; Payables to related parties]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 78
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=crml_CriticalMetalsCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_TanbreezMiningGreenlandASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_DirectorsAndKeyManagementPersonnelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_SteveParkesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_MichaelRyanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=srt_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_BellatrixCorporatePtyLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_TonySageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=crml_NorthGreenlandApSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfAntidilutiveInstrumentsAxis=ifrs-full_RestrictedShareUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Disclosures (Details) - USD ($)				2 Months Ended	12 Months Ended
Related Party Disclosures (Details) - USD ($)	Apr. 29, 2026	Apr. 28, 2025	Jan. 25, 2025	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2024	May 06, 2026	Nov. 01, 2025	Jun. 30, 2025	May 16, 2025	Feb. 26, 2025	Jan. 28, 2025	Jul. 23, 2024	Jul. 01, 2024	Jun. 07, 2024
Related Party Disclosures [Line Items]
Capital contributions (in Dollars)					$ 4,445,741
Owing amount (in Dollars)				$ 5,671,129	5,671,129				$ 5,854,852
Additional shares		5,000,000
Deemed value (in Dollars)		$ 6,850,000
Supplementary financing (in Dollars)	$ 5,200,000
Interest free loan arrangement amount (in Dollars)	$ 4,500,000
Certain costs (in Dollars)					$ 15,249	$ 313,931
Critical Metals Corp [Member]
Related Party Disclosures [Line Items]
Shares issued price per share (in Dollars per share)		$ 1.37
Tanbreez Mining Greenland A/S [Member] \| Critical Metals Corp [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance													8,395,523
Directors and Key Management Personnel [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance								5,110,000
Premium vested options								6,030,000
Shares issued to directors and management									89,243
Shares revised			2,240,000
Steve Parkes [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance												100,000
Michael Ryan [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance												100,000
Director [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance										1,810,000
Bellatrix Corporate Pty Ltd [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance			100,000
Tony Sage [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance											500,000
North Greenland ApS [Member]
Related Party Disclosures [Line Items]
Issued capital rate							70.00%
Purchases of acquisition				$ 2,631,544
RSU’s [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance				2,535,000	2,535,000			6,230,000
RSU’s [Member] \| Directors and Key Management Personnel [Member]
Related Party Disclosures [Line Items]
No of shares, Opening balance								315,000						1,285,000	955,000