XML 64 R38.htm IDEA: XBRL DOCUMENT
v3.25.2

Nature of Operations (Details) | Apr. 28, 2025 km² item
--- | ---
Nature of Operations |
Number of applications for exploration licenses | item | 2
Number of applications made for commercial recovery permit. | item | 1
Area of land for exploration license (in square km) | km² | 199,895
Area of land for commercial recovery (in square km) | km² | 25,160

X
- Definition Area of land for which applications submitted to secure commercial recovery. + References No definition available. + Details
Name: | tmc_CommercialRecoveryAreaOfLand
Namespace Prefix: | tmc_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area of land for which applications submitted to secure exploration license. + References No definition available. + Details
Name: | tmc_ExplorationLicenseAppliedAreaOfLand
Namespace Prefix: | tmc_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of application made for exploration licenses + References No definition available. + Details
Name: | tmc_NumberOfApplicationForCommercialRecoveryPermit
Namespace Prefix: | tmc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of application made for exploration licenses. + References No definition available. + Details
Name: | tmc_NumberOfApplicationForExplorationLicenses
Namespace Prefix: | tmc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration