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Related Party Transactions - Schedule of Addition to the Transactions Disclosed Elsewhere in these Consolidated Financial Statements (Parenthetical) (Detail) $ in Thousands, $ in Millions | 6 Months Ended | 12 Months Ended | 18 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2022 HKD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 HKD ($) | Aug. 31, 2022 | Jan. 01, 2021 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Asset acquisition consideration transferred or transferrable |  | $ (268,000) |  |  |  |  |
Unsecured debt current |  | $ 55,803 | $ 0 | $ 0 |  |  | $ 0
HIBOR [Member] | Short Term Debt Tranche One Variable Rate Of Interest [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Debt instrument variable interest spread percentage |  | 1.15% |  |  |  |  |
Amtd Assets [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Business combination voting interest percentage |  | 100.00% |  |  |  | 96.10% |
Related Company [Member] | Unlisted Equity Investment [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Gain loss on disposal of equity investments without readily determinable fair value |  |  |  | 16,094 |  |  |
Immediate Holding Company [Member] | Staff And Premises Costs [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Fixed Service Fee Per Quarter | $ 6 |  |  |  | $ 9 |  |
Immediate Holding Company [Member] | Loan Receivable On Demand [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Related party transaction rate of interest |  | 2.00% |  |  |  |  |
Loans receivable gross current |  | $ 1,057,007 | 287,178 | 275,127 |  |  |
Financing receivable allowance for credit loss current |  | 4,988 | $ 0 | $ 0 |  |  |
Immediate Holding Company [Member] | Disposal of Financial Assets [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Proceeds from Sale of Financial Assets at Fair Value through Profit or Loss to Immediate Holding Company |  | 80,155 |  |  |  |  |
Immediate Holding Company [Member] | Asset Acquisition [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Asset acquisition consideration transferred or transferrable |  | 268,000 |  |  |  |  |
Immediate Holding Company [Member] | AMTD Digital [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Business combination voting interest percentage |  |  | 82.70% |  |  |  |
Business combination consideration transferred |  |  | $ 993,000 |  |  |  |
Non Controlling Shareholder [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Unsecured debt current |  | 22,681 |  |  |  |  |
Non Controlling Shareholder [Member] | HIBOR [Member] | Short Term Debt Tranche One Variable Rate Of Interest [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Unsecured debt current |  | 7,643 |  |  |  |  |
Non Controlling Shareholder [Member] | HIBOR [Member] | Short Term Debt Tranche Two Variable Rate Of Interest [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Unsecured debt current |  | $ 25,479 |  |  |  |  |
Debt instrument variable interest spread percentage |  | 1.15% |  |  |  |  |
AMTD Assets Alpha Group [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Additional Percentage Interests Acquired In Subsidiaries |  |  |  | 19.90% |  |  |

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