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Staff costs and Directors' remuneration - Summary of Director's Remuneration (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Director
Disclosure of Directors Emoluments [Line Items]
Base salaries, fees, annual performance payments and benefits	$ 7.8	$ 6.9	$ 6.9

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- 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 112
-Subparagraph c
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-URIDate 2025-03-27

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- Definition

Disclosure of Director's emoluments.

+ References

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