Acquisitions of Subsidiaries - Summary of Reserve Arising on Acquisition (Parenthetical) (Detail)	12 Months Ended
Dec. 31, 2022
Business Combinations [Abstract]
Percentage Of Non Controlling Interest Recognized At Acquisition Date	2.91

Percentage Of Non Controlling Interest Recognized At Acquisition Date.

No definition available.

Name:	amtd_PercentageOfNonControllingInterestRecognizedAtAcquisitionDate
Namespace Prefix:	amtd_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration