Employee compensation and benefits - Key actuarial assumptions for the principal plan (Details)	Dec. 31, 2024	Dec. 31, 2023
Disclosure of defined benefit plans [line items]
Inflation rate (CPI)	2.88%	2.67%
Pension Plan \| Principal plan
Disclosure of defined benefit plans [line items]
Discount rate	5.54%	4.65%
Inflation rate (RPI)	3.33%	3.23%
Rate of increase for pensions	3.22%	3.14%
Rate of pay increase	3.63%	3.42%

Actuarial Assumption Of Expected Rates Of Inflation, Consumer Price Index

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- Definition

Actuarial Assumption Of Expected Rates Of Inflation, Retail Price Index

+ References

No definition available.

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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 2024-01-01
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard
-URIDate 2024-03-27

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- Definition

The expected rate of increases in pension that is 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]]

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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]]

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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.

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No definition available.

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