Basis of preparation (Details)	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
U.S. Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1.167	1.093
Closing foreign exchange rate	1.139	1.172	1.175
Swiss Franc
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	0.918	0.941
Closing foreign exchange rate	0.922	0.935	0.931
Chinese Renminbi
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	8.007	7.924
Closing foreign exchange rate	7.731	8.397	8.226
Pound Sterling
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	0.867	0.842
Closing foreign exchange rate	0.862	0.856	0.873
Hong Kong Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	9.127	8.517
Closing foreign exchange rate	8.935	9.200	9.146
Singapore Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1.491	1.446
Closing foreign exchange rate	1.475	1.494	1.511
United Arab Emirates Dirham
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	4.284	4.013
Closing foreign exchange rate	4.184	4.304	4.315
Japanese Yen
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	184.459	162.120
Closing foreign exchange rate	185.080	169.170	184.090
South Korea Won
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1,730.659	1,556.502
Closing foreign exchange rate	1,767.08	1,588.21	1,696.94

The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
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