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Related Party Disclosures - Summary of Disclosure of Transactions Between Related Parties (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2021
Disclosure of transactions between related parties [line items] |  |  |
Purchase of treasury shares | $ 318,882 |  |
Immediate Holding Company [Member] | Repurchase of shares of the Company [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Immediate holding company |  |
Description of nature of transactions | Repurchase of shares of the Company |  |
Purchase of treasury shares | $ 318,882 | $ 0 | $ 0
Immediate Holding Company [Member] | Consideration for acquisition of AMTD Assets |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Immediate holding company |  |
Description of nature of transactions | Consideration for acquisition of AMTD Assets |  |
Revenue from rendering of services, related party transactions | $ 266,647 | 0 | 0
Fellow Subsidiaries [Member] | Digital solutions services—financial services rendered [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Fellow subsidiaries |  |
Description of nature of transactions | Digital solutions services—financial services rendered |  |
Revenue from rendering of services, related party transactions | $ 52 | 74 | 11
A Related Company [Member] | Digital solutions services—non financial services income [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | A related company |  |
Description of nature of transactions | Digital solutions services—non financial services rendered |  |
Revenue from rendering of services, related party transactions | $ 0 | 0 | 645
Ultimate Holding Company [Member] | Digital solutions services—financial services rendered [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Ultimate holding company |  |
Description of nature of transactions | Digital solutions services—financial services rendered |  |
Revenue from rendering of services, related party transactions | $ 7 | 11 | 62
Ultimate Holding Company [Member] | Digital solutions services—non financial services income [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Ultimate holding company |  |
Description of nature of transactions | Digital solutions services—non financial services rendered |  |
Revenue from rendering of services, related party transactions | $ 2,168 | 1,642 | 963
Ultimate Holding Company [Member] | Corporate expenses allocated [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Ultimate holding company |  |
Description of nature of transactions | Corporate expenses allocated |  |
Services received, related party transactions | $ 1,212 | 910 | 803
Ultimate Holding Company [Member] | Interest Income [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Description of related party relationship | Ultimate holding company |  |
Description of nature of transactions | Interest income |  |
Revenue from rendering of services, related party transactions | $ 6,612 | $ 0 | $ 0

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- Definition The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_106_d&doctype=Standard -URIDate 2022-03-24 + Details
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