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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 ($) | Dec. 31, 2022 HKD ($) | Feb. 28, 2022 HKD ($) | Feb. 28, 2022 USD ($) $ / shares | 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% | 82.70% | 82.70% |
Consideration transferred, acquisition-date fair value |  |  |  |  | $ 9,027,872,459 | $ 993 |
Share Price | $ / shares |  |  |  |  |  | $ 8.38 |
Capital reserve |  |  |  |  | 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% |
L'Officiel [member] |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Percentage of voting equity interests acquired | 100.00% |  |  |  |  |  |
Consideration transferred, acquisition-date fair value | $ 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 |  |  |

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