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Basis of Presentation - Summary of Principal Annual Rates (Detail)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Hotel property	Over the shorter of the useful life of 40 years and the remaining lease term
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Percentage on Property Plant And Equipment Owned Accumulated Depreciation	20.00%
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Percentage on Property Plant And Equipment Owned Accumulated Depreciation	33.33%

X

- Definition

Description of property plant and equipment useful life.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage on property plant and equipment owned accumulated depreciation.

+ References

No definition available.

+ Details

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Namespace Prefix:	amtd_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

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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:

X

- Details

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