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Derivative Financial Asset - Additional Information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 $ / shares | Dec. 31, 2022 USD ($) shares | Jun. 30, 2022 USD ($)
AMTD Investment Solutions Group And Amtd Strategic Investments [Member] |  |  |  |  |  |  |
Derivative Financial Asset [Line Items] |  |  |  |  |  |  |
Number of shares of investment disposed | shares |  |  |  |  |  | 2,673,000 |
Upside Participation and Profit Distribution Agreements [Member] |  |  |  |  |  |  |
Derivative Financial Asset [Line Items] |  |  |  |  |  |  |
Number of shares of investment disposed | shares |  |  |  |  |  | 2,673,000 |
Sale of stock price per share | $ / shares |  |  |  |  | $ 3.27 |  |
Disposal of Investment | $ 56,142 | $ 1,963 | $ 5,697 |  |  |  |
Future Settlement Contract [Member] |  |  |  |  |  |  |
Derivative Financial Asset [Line Items] |  |  |  |  |  |  |
Disposal of Investment |  |  | $ 17,681 |  |  |  |
Aggregate price |  |  |  |  |  |  | $ 53,272
Fair value of underlying shares |  |  |  |  |  | $ 70,953 |
Net fair value changes recognized in profit or loss |  |  |  | $ 17,681 |  |  |

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- Definition Consideration received from disposal of investment. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Derivative financial asset. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value of underlying items for contracts with direct participation features. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Gains losses on derivative financial assets at fair value through profit or loss mandatorily measured at fair value. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Number of shares of investment partially sold. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Shares entitled to be received at mutually agreed price as per future settlement contract derivatives. + References No definition available. + Details
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Namespace Prefix: | amtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
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
Name: | amtd_AgreementAxis=amtd_UpsideParticipationAndProfitDistributionAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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