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Financial Instruments - Summary of entity internal credit risk grading assessment (Detail)
 12 Months Ended
Apr. 30, 2023
Normal Risk [Member]  
Disclosure of internal credit grades [line items]  
Description The counterparty has a low risk of default and usually settled within credit period
Normal Risk [Member] | Commission receivable from digital solutions services—financial services, accounts receivable arising from digital solutions services—non financial services and accounts receivable from hotel operations, hospitality and VIP services [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Lifetime ECL-not credit-impaired
Normal Risk [Member] | Other Financial Assets [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses 12-month ECL
Doubtful [Member]  
Disclosure of internal credit grades [line items]  
Description There have been significant increases in credit risk since initial recognition through information developed internally or external resources
Doubtful [Member] | Commission receivable from digital solutions services—financial services, accounts receivable arising from digital solutions services—non financial services and accounts receivable from hotel operations, hospitality and VIP services [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Lifetime ECL-not credit-impaired
Doubtful [Member] | Other Financial Assets [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Lifetime ECL-not credit-impaired
Loss [Member]  
Disclosure of internal credit grades [line items]  
Description There is evidence indicating the asset is credit-impaired
Loss [Member] | Commission receivable from digital solutions services—financial services, accounts receivable arising from digital solutions services—non financial services and accounts receivable from hotel operations, hospitality and VIP services [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Lifetime ECL-credit-impaired
Loss [Member] | Other Financial Assets [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Lifetime ECL-credit-impaired
Write-off [Member]  
Disclosure of internal credit grades [line items]  
Description There is evidence indicating that the debtor is in severe financial difficulty and the Group has no realistic prospect of recovery
Write-off [Member] | Commission receivable from digital solutions services—financial services, accounts receivable arising from digital solutions services—non financial services and accounts receivable from hotel operations, hospitality and VIP services [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Amount is written off
Write-off [Member] | Other Financial Assets [Member]  
Disclosure of internal credit grades [line items]  
Method of Assessment of Expected Credit Losses Amount is written off