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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration