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Financial Assets At Fair Value Through Profit Or Loss - (Additional Information) (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2022
HKD ($)
Dec. 31, 2021
HKD ($)
Dec. 31, 2022
USD ($)
Jun. 01, 2022
May 05, 2022
Feb. 28, 2022
HKD ($)
Dec. 28, 2021
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Unrealized gain on stock loan $ 70,293,600            
AMTD Digital [Member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Equity interests of acquirer           $ 7,756,228,581  
AMTD Digital [Member] | Class A and Class B Ordinary Shares [Member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Equity interests of acquirer     $ 993        
Investment A [member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Effective interest rate of financial assets reclassified out of financial assets at fair value through profit or loss       2.00% 2.00%   2.00%
Investment H [Member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Extinguishment of Debt, Amount 163,180,000            
Listed Equity Shares [member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Unrealized gain on stock loan   $ 47,378,880          
Listed Equity Shares [member] | Stock Loan [member]              
Financial Assets At Fair Value Through Profit or Loss [Line Items]              
Fair value of listed equity shares $ 169,583,400 $ 211,331,400