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v3.23.1

Subsequent event - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | Apr. 19, 2023 | Feb. 28, 2023 | Dec. 31, 2022
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Disclosure of non-adjusting events after reporting period [line items] |  |  |
Consideration paid |  |  | $ 993.0
Major ordinary share transactions [member] |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |
Consideration paid |  | $ 268.0 |
Share per price |  | $ 8.68 |
Major ordinary share transactions [member] | AMTD Assets Group [member] |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |
Consideration transferred, acquisition-date fair value |  | $ 500.0 |
Percentage of equity transferred |  | 100.00% |
Class A Ordinary Shares [Member] | Major ordinary share transactions [member] |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |
Newly issued ordinary shares | 90,000,000 |  |
Proceeds from issuing shares | $ 93.6 |  |
Class B Ordinary Shares [Member] | Major ordinary share transactions [member] |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |
Newly issued ordinary shares |  | 30,875,576 |

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