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Credit facilities and long-term debt - Letters of Credit and Bonds Issued (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of detailed information about borrowings [line items] |  |
Available facility amount | $ 254,623 | $ 202,346
Letters Of Credit Facilities With Banks |  |
Disclosure of detailed information about borrowings [line items] |  |
Facility amount | 60,000 | 55,000
Less letters of credit issued in support of: | 11,637 | 12,534
Available facility amount | 48,363 | 42,466
Letters Of Credit Facilities With Banks | Insurance programs |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | (11,302) | (12,199)
Letters Of Credit Facilities With Banks | Performance obligations |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | (100) | (100)
Letters Of Credit Facilities With Banks | Other payment obligations |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | (235) | (235)
Performance Bond Facility |  |
Disclosure of detailed information about borrowings [line items] |  |
Facility amount | 60,000 | 60,000
Less letters of credit issued in support of: | 18,761 | 35,140
Available facility amount | 41,239 | 24,860
Performance Bond Facility | Other payment obligations |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | (10,178) | (26,557)
Performance Bond Facility | Excavation and reclamation obligations |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | (4,954) | (4,954)
Performance Bond Facility | Surety bond |  |
Disclosure of detailed information about borrowings [line items] |  |
Less letters of credit issued in support of: | $ (3,629) | $ (3,629)

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 50 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_50_a&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Borrowings, Letters Of Credit + References No definition available. + Details
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Namespace Prefix: | ttam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |