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Subsequent events (Details) - Dividend Declared for Q4 [Member]	Oct. 29, 2025 $ / shares
Dividend Payments [Abstract]
Dividend declare date	Oct. 29, 2025
Dividend declared (in dollars per share)	$ 0.18
Dividend payable date	Nov. 19, 2025
Dividend record date	Nov. 12, 2025

X

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	dht_DividendDeclareDate
Namespace Prefix:	dht_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The declared dividend, payable date in CCYY format.

+ References

No definition available.

+ Details

Name:	dht_DividendPayableDate
Namespace Prefix:	dht_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The dividend paid was declared, in CCYY format.

+ References

No definition available.

+ Details

Name:	dht_DividendPayableRecordDate
Namespace Prefix:	dht_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	dht_DividendPaymentAbstract
Namespace Prefix:	dht_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of dividends payable per ordinary share.

+ References

No definition available.

+ Details

Name:	dht_DividendsPayableOrdinarySharesPerShare
Namespace Prefix:	dht_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=dht_DividendDeclaredForQ4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: