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Retirement benefit obligations - Disclosure of main actuarial assumptions used to measure the retirement benefit obligations (Details) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of defined benefit plans [line items] |  |  |
Discount Rate (IBoxx Corporates AA) | 3.70% | 3.34% | 0.90%
Salary increase rate | 3.00% |  |
Turnover rate, average exit rate | 2.02% | 2.05% |
Employee contribution rate | 45.00% | 45.00% | 45.00%
Top of range |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Turnover rate |  |  | 5.80%
Bottom of range |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Turnover rate | 0.00% | 0.00% | 0.05%
Key magement |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Retirement age | 65 years | 65 years | 65 years
Salary increase rate |  | 3.00% | 3.00%
Other employees |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Retirement age | 64 years | 64 years | 63 years
Salary increase rate |  | 2.55% | 2.55%

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- Definition Actuarial Assumption Of Employee Contribution Rate + References No definition available. + Details
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- Definition Actuarial Assumption Of Expected Rates Of Turnover + References No definition available. + Details
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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_144&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_144&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The retirement age used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_144&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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