Summary of significant accounting policies - Summary of new standards, amendments and interpretations not yet effective (Details)	12 Months Ended
	Dec. 31, 2025
IAS 21 Lack of Exchangeability (Amendments to IAS 21)
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2025
IFRS 7 and IFRS 9 Classification and Measurement of Financial Instruments (Amendments to IFRS 9 and IFRS 7)
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2026
IFRS 7 and IFRS 9 Contracts Referencing Nature-dependent Electricity (Amendments to IFRS 9 and IFRS 7)
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2026
Annual Improvements to IFRS Accounting Standards-Volume 11
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2026
IFRS 18 Presentation and Disclosure in Financial Statements
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2027
IFRS 19 Subsidiaries without Public Accountability: Disclosures
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2027
IFRS 19 Subsidiaries without Public Accountability: Disclosures (Amendments to IFRS 19)
Disclosure of expected impact of initial application of new standards or interpretations
Date of Reporting Standards Adopted	Jan. 01, 2027