The amount of treasury stock cancelled or not reissued during the period.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

The cancelled borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	hafn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	hafn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents number of vessels sold and delivered.

+ References

No definition available.

+ Details

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Namespace Prefix:	hafn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The maturity of borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

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Balance Type:	na
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- Definition

The number of share options granted in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_b_ii&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b_ii&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b_ii&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 16
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_16_a&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Details

Name:	ifrs-full_BorrowingsByNameAxis=hafn_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=hafn_ChinaMerchantsBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=hafn_ICBCBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Events occurring after balance sheet date (Details) $ in Thousands						12 Months Ended
	Apr. 09, 2026 Vessel	Apr. 03, 2026 USD ($)	Mar. 27, 2026 shares	Mar. 17, 2026 shares	Feb. 27, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2026 USD ($)
Events after reporting period [Abstract]
Purchase of property, plant and equipment						$ 146,199	$ 49,600	$ 184,392
Subsequent Event [Member]
Events after reporting period [Abstract]
Cancellation of treasury share \| shares			12,721,253
Purchase of property, plant and equipment		$ 405,000
Number of vessels sold and delivered \| Vessel	2
Subsequent Event [Member] \| Credit Facility [Member]
Events after reporting period [Abstract]
Cancelled borrowings									$ 473,000
Subsequent Event [Member] \| China merchants bank [Member]
Events after reporting period [Abstract]
Facility amount					$ 100,000
Borrowings maturity					27-Feb-29
Subsequent Event [Member] \| ICBC bank [Member]
Events after reporting period [Abstract]
Facility amount					$ 100,000
Borrowings maturity					5-Mar-27
Subsequent Event [Member] \| LTIP 2026 [Member]
Events after reporting period [Abstract]
Number of share options granted (in shares) \| shares				2,489,948