Related Party Disclosures - Summary of Disclosure of Transactions Between Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
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

The description of the nature of the related party relationships. [Refer: Related parties [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2022-03-24
-Paragraph 18
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2022-en-r&anchor=para_18&doctype=Standard
-URIDate 2022-03-24

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- Definition

The description of related party transactions. [Refer: Related parties [member]]

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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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
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-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

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Balance Type:	debit
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- Definition

The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 24
-IssueDate 2022-03-24
-Paragraph 21
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2022-en-r&anchor=para_21_c&doctype=Standard
-URIDate 2022-03-24

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The amount of services received in related party transactions. [Refer: Related parties [member]]

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