Acquisitions of Subsidiaries - Summary of Reserve Arising on Acquisition (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Consideration transferred	$ 268,000
Less: recognized amounts of net liabilities acquired	3,154
Total	275,154
AMTD Idea Group [Member]
Business Acquisition [Line Items]
Consideration transferred		$ 1,155,392
Plus: non-controlling interests of AMTD		11,427
Less: recognized amounts of net liabilities acquired		(395,290)
Total		774,197
AMTD Digital [Member]
Business Acquisition [Line Items]
Plus: non-controlling interests of AMTD	(1,019)
Amtd Assets [Member]
Business Acquisition [Line Items]
Plus: non-controlling interests of AMTD	(336)
Less: recognized amounts of net liabilities acquired	(3,154)
Amtd Assets Subsidiaries [Member]
Business Acquisition [Line Items]
Plus: non-controlling interests of AMTD	$ 5,355
Amtd Assets Subsidiaries [Member] \| AMTD Idea Group [Member]
Business Acquisition [Line Items]
Plus: non-controlling interests of AMTD		$ 2,668

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Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.

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