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Acquisitions of Subsidiaries - Additional Information (Detail)
$ / shares in Units, $ in Millions
 1 Months Ended 8 Months Ended 10 Months Ended 12 Months Ended
Apr. 30, 2022
HKD ($)
Dec. 31, 2022
HKD ($)
Dec. 31, 2022
HKD ($)
Dec. 31, 2022
HKD ($)
Dec. 31, 2022
USD ($)
$ / shares
Feb. 28, 2022
HKD ($)
Dec. 31, 2021
HKD ($)
Disclosure of detailed information about business combination [line items]              
Capital reserve   $ 7,734,456,434 $ 7,734,456,434 $ 7,734,456,434     $ 4,551,183,728
Gain on bargain purchase       $ 37,966,405      
AMTD Digital [Member]              
Disclosure of detailed information about business combination [line items]              
Percentage of voting equity interests acquired   97.10% 97.10% 97.10% 97.10%    
Percentage of acquisition of ordinary shares   82.70% 82.70% 82.70% 82.70%    
Consideration transferred, acquisition-date fair value         $ 993 $ 9,027,872,459  
Share Price | $ / shares         $ 8.38    
Capital reserve   $ 6,049,000,000 $ 6,049,000,000 $ 6,049,000,000      
Revenue of acquiree since acquisition date     298,000,000        
Profit (loss) of acquiree since acquisition date     $ 250,500,000        
Revenue of combined entity       1,252,400,000      
Profit loss of combined entity       1,130,800,000      
Accounts receivable recognised as of acquisition date           $ 58,752,389  
Acquisition related cost recognized as expense       $ 0      
Percentage of owned issued and outstanding shares   14.40% 14.40% 14.40% 14.40%    
L'Officiel [member]              
Disclosure of detailed information about business combination [line items]              
Percentage of voting equity interests acquired   100.00% 100.00% 100.00% 100.00%    
Consideration transferred, acquisition-date fair value $ 492,824,872 $ 492,824,872 $ 492,824,872 $ 492,824,872      
Revenue of acquiree since acquisition date   59,700,000          
Profit (loss) of acquiree since acquisition date   $ 21,300,000          
Revenue of combined entity       1,391,100,000      
Profit loss of combined entity       1,269,400,000      
Accounts receivable recognised as of acquisition date 14,555,302            
Other receivable recognised as of acquisition date 19,557,396            
Gain on bargain purchase $ 37,966,405            
Acquisition related cost recognized as expense       $ 0