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Cash And Bank Balances And Restricted Cash - Summary of detailed information about cash and bank balances (Detail) - HKD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Cash and cash equivalents [abstract] |  |
Cash on hand | $ 1,497 | $ 595,992
General bank accounts | 1,078,409,838 | 525,610,116
Total cash and bank balances | $ 1,078,411,335 | $ 526,206,108

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- Definition Total cash and bank balances. + References No definition available. + Details
Name: | amtd_TotalCashAndBankBalances
Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of cash balances held at banks. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_BalancesWithBanks
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | ifrs-full_CashAndCashEquivalentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of cash held by the entity. This does not include demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_CashOnHand
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant