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Share-based compensation - Performance-Based Restricted stock units - Changes in the PRSUs (Details)	12 Months Ended
	Dec. 31, 2024 D shares	Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of trading days | D	30
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance as at the beginning	38,713
PRSUs granted (in shares)	47,894	38,713
Balance as at the end (none of which are vested)	86,607	38,713
PRSUs | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total quantity of PRSUs eligible to vest (as a percentage)	0.00%
PRSUs | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total quantity of PRSUs eligible to vest (as a percentage)	200.00%

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- Definition

The percentage of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Threshold number of trading days taken to determine total shareholder return under a share based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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