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General information (Details)	12 Months Ended
	Dec. 31, 2019 Subsidiaries CrudeCarrier t
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	35
Number of large crude carriers | CrudeCarrier	27
Total carrying capacity | t	8,360,850
Top of Range [Member]
Disclosure of subsidiaries [abstract]
Weight of tankers | t	320,000
Bottom of Range [Member]
Disclosure of subsidiaries [abstract]
Weight of tankers | t	200,000
Marshall Island [Member]
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	23
Number of vessel-owning subsidiaries	20
Cayman Islands [Member]
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	7
Number of vessel-owning subsidiaries	7
Singapore [Member]
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	3
Monegasque [Member]
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	1
Norwegian [Member]
Disclosure of subsidiaries [abstract]
Number of wholly owned subsidiaries	1

X

- Definition

Number of large crude carriers by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
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Balance Type:	na
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X

- Definition

This element represents number of vessel-owning subsidiaries by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

This element represents number of wholly owned subsidiaries by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	dht_
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X

- Definition

Total carrying capacity of tankers.

+ References

No definition available.

+ Details

Name:	dht_TotalCarryingCapacity
Namespace Prefix:	dht_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

X

- Definition

This element represents weight of tankers in different size ranges.

+ References

No definition available.

+ Details

Name:	dht_WeightOfTankers
Namespace Prefix:	dht_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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- Details

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- Details

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X

- Details

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Namespace Prefix:
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X

- Details

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- Details

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- Details

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- Details

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