Retirement benefit obligations - Schedule of Weighted Average Duration of Defined Benefit Pension Obligations (Details)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of employee benefits [Abstract]
Duration of the defined benefit obligation	11 years	12 years

The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2025-01-01
-Paragraph 147
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_147_c&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration