Basis of preparation (Details)	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
U.S. Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1.093	1.081
Closing foreign exchange rate	1.172	1.071	1.039
Swiss Franc
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	0.941	0.962
Closing foreign exchange rate	0.935	0.963	0.941
Chinese Renminbi
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	7.924	7.801
Closing foreign exchange rate	8.397	7.775	7.583
Pound Sterling
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	0.842	0.855
Closing foreign exchange rate	0.856	0.846	0.829
Hong Kong Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	8.517	8.454
Closing foreign exchange rate	9.200	8.359	8.069
Singapore Dollar
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1.446	1.456
Closing foreign exchange rate	1.494	1.451	1.416
United Arab Emirates Dirham
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	4.013	3.971
Closing foreign exchange rate	4.304	3.931	3.815
Japanese Yen
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	162.120	164.461
Closing foreign exchange rate	169.170	171.940	163.060
South Korea Won
Disclosure In Tabular Form Of Foreign Exchange Rates Used For Translation [Line Items]
Average foreign exchange rate	1,556.502	1,460.315
Closing foreign exchange rate	1,588.21	1,474.86	1,532.15

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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-IssueDate 2025-01-01
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-URIDate 2025-03-27

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