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Financial instruments, Fair value of derivative financial instruments (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 USD ($) Swap | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Financial instruments [Abstract] |  |  |
Number of interest rate swaps | Swap | 8 |  |
Fair value loss on derivative financial liabilities | $ | $ (170) | $ 0 | $ (504)

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- Definition The number of interest rate swaps. + References No definition available. + Details
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Namespace Prefix: | dht_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_85&doctype=Standard -URIDate 2025-03-27 + Details
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Namespace Prefix: | ifrs-full_
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Balance Type: | credit
Period Type: | duration