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Regulatory Requirement - Additional Information (Detail) - HKD ($)	Jan. 01, 2022	Dec. 31, 2021
AMTD Risk Solutions Group Limited [Member]
Regulatory Requirement [Line Items]
Paid-up Share Capital and Net Assets	$ 300	$ 100

X

- Definition

Minimum paid up share capital and net assets required to maintain for insurance brokerage subsidiary.

+ References

No definition available.

+ Details

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Namespace Prefix:	hkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Regulatory requirement.

+ References

No definition available.

+ Details

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Namespace Prefix:	hkd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: