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CORPORATE INCOME TAX - Valuation allowance for deferred tax assets (Details) ₫ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 VND (₫)	Dec. 31, 2023 VND (₫)	Dec. 31, 2022 VND (₫)
Movement of valuation allowance
Balance at beginning of the year	$ 514,204,849	₫ 12,513,175	₫ 7,911,734	₫ 2,840,310
Net change in valuation allowance	271,305,897	6,602,229	4,601,441	5,071,424
Balance at end of the year	$ 785,510,746	₫ 19,115,404	₫ 12,513,175	₫ 7,911,734

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_ValuationAllowanceAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration