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v3.26.1

Related Party Transactions - Schedule of Compensation of Key Management (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Related Party Transactions [Abstract] |  |  |
Total remuneration | $ 558 | $ 898 | $ 1,465

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- Definition Total key management personnel. + References No definition available. + Details
Name: | amtd_KeyManagerialPersonnelRemuneration
Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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